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ASME PRESSURE VESSEL GENERAL


BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 2 of 23

PRESSURE VESSELS PER ASME - GENERAL

Rec

ord of Revisions
Revision No. A 1 2 3 4 5 Date 2001-03-16 2001-09-20 2001-11-16 2002-03-07 2002-06-22 2002-09-25 Issue for review. Issue for design. Revised as marked. Issue for design. BASF comments incorporated. Revised as marked. Issue for design. Specifications and Drawings added/deleted/corrected, as marked. Issue for design. MDMT defined, page 10. Issued for design. Revised as indicated Description

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 3 of 23

PRESSURE VESSELS PER ASME - GENERAL

Table of Contents Section
1.0

Page

GENERAL .....................................................................................................................................................5 1.1 1.2 1.3 1.4 Scope of Specification ....................................................................................................................5 Requirements For Regulatory Agencies .......................................................................................5 Conformance ...................................................................................................................................5 Definitions........................................................................................................................................5

2.0

CODES, SPECIFICATIONS AND REFERENCES ..................................................................................5 2.1 2.2 2.3 2.4 2.5 2.6 2.7 General.............................................................................................................................................5 ASCE (American Society of Civil Engineers) ...............................................................................5 ASME (American Society of Mechanical Engineers)...................................................................5 AWS (American Welding Society).................................................................................................6 BASF-YPC, IPS Project Specifications.........................................................................................6 BASF-YPC, IPS Project Standard Drawings ...............................................................................6 Purchaser Drawings........................................................................................................................7

3.0 4.0

PRECEDENCE .............................................................................................................................................7 SUBMITTALS...............................................................................................................................................7 4.1 4.2 4.3 4.4 General.............................................................................................................................................7 Documents For Review ...................................................................................................................8 Drawings and documents ...............................................................................................................8 Calculations .....................................................................................................................................9

5.0

PRODUCTS...................................................................................................................................................9 5.1 General.............................................................................................................................................9

6.0

DESIGN .......................................................................................................................................................10 6.1 6.2 6.3 6.4 6.5 Design Criteria ..............................................................................................................................10 Corrosion Allowance.....................................................................................................................11 Shells and Heads............................................................................................................................12 Supports .........................................................................................................................................12 Connections, Nozzles, and Flange................................................................................................13

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BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 4 of 23

PRESSURE VESSELS PER ASME - GENERAL 6.6 6.7 6.8 6.9 7.0 Internal Piping...............................................................................................................................15 Manholes, Handholes and Inspection Openings.........................................................................15 Equipment Erection......................................................................................................................16 Sealing Collars on Apparatus with Insulation............................................................................16

BASIC MATERIALS AND METHODS...................................................................................................17 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 General...........................................................................................................................................17 Substitutions ..................................................................................................................................17 Internals .........................................................................................................................................17 External Pressure Stiffening Rings..............................................................................................18 Bolting ............................................................................................................................................18 Gaskets ...........................................................................................................................................18 Support and External Appurtenances.........................................................................................19 Accessories .....................................................................................................................................19

8.0

FABRICATION AND MANUFACTURE ................................................................................................19 8.1 8.2 8.3 8.4 General...........................................................................................................................................19 Welding ..........................................................................................................................................19 PWHT (Postweld Heat Treatment) Of Welds ............................................................................20 Cleaning and Painting ..................................................................................................................20

9.0

INSPECTION AND TESTING..................................................................................................................20 9.1 9.2 9.3 9.4 General...........................................................................................................................................20 Inspection.......................................................................................................................................20 Pressure Tests................................................................................................................................20 Leak Tests ......................................................................................................................................21

10.0

IDENTIFICATION AND MARKING ......................................................................................................21 10.1 General...........................................................................................................................................21

11.0

PREPARATION FOR SHIPMENT ..........................................................................................................22 11.1 General...........................................................................................................................................22

12.0

REQUIREMENTS FOR CODE DATA, MATERIAL AND QUALITY CONTROL RECORDS......22 12.1 12.2 12.3 Scope ..............................................................................................................................................22 General...........................................................................................................................................22 Requirements.................................................................................................................................23

13.0

ATTACHMENTS........................................................................................................................................23

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 5 of 23

PRESSURE VESSELS PER ASME - GENERAL

1.0

GENERAL 1.1 Scope of Specification

This specification prescribes the design, fabrication, inspection, and testing of pressure vessels, complete with accessories as shown on vessel drawings, standard drawings, and as specified herein. 1.2 Requirements For Regulatory Agencies All Pressure Vessels imported into the People’s Republic of China are required to be manufactured under a SAFETY QUALITY LICENSE (SQL) certificate issued by the Ministry of Labor in China. More information on this requirement can be obtained at www.cbpvi.com 1.3 Conformance The design, fabrication and testing of pressure vessels shall be in accordance with specification 40-010-00-V-0-00-001 and conform to the requirements of ASME Code, Section VIII, Division 1, 2 or 3, as applicable, and additional requirements as stated on Purchaser datasheets, drawings and specifications. Any deviation from this specification requires approval in writing by the Purchaser prior to commencement of fabrication. 1.4 Definitions Vendor: Owner: Licensor: Purchaser: The word Vendor will be used for the main seller or supplier The word Owner will be used for BASF-YPC The Licensors are BASF or BASELL etc Party responsible for issuing the Purchase Order. This may be the main Engineering, Procurement and Construction (EPC) Contractor acting as an agent for the Owner. 2.0 CODES, SPECIFICATIONS AND REFERENCES 2.1 General

The publications listed below form part of this specification. Each publication shall be the latest revision and addendum in effect on the date of issue of Purchase Order unless noted otherwise. Except as modified by the requirements specified herein or the details of the drawings, Work included in this specification shall conform to the applicable provisions of these publications. 2.2 ASCE-7 1.1 ASCE (American Society of Civil Engineers) Minimum Design Loads for Buildings and other Structures ASME (American Society of Mechanical Engineers)

ASME Boiler and Pressure Vessel Code: Section II Parts A, B, C, D Materials

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BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 6 of 23

PRESSURE VESSELS PER ASME - GENERAL Section V Section IX Code Cases ASME B16.47 ASME B16.5 ASME B16.20 ASME B1.1 ASME B1.20.1 1.2 Large Diameter Steel Flanges Steel Pipe Flanges and Flanged Fittings Metallic Gaskets for Pipe Flanges Ring-Joint, Spiral-Wound, and Jacketed Unified Inch Screw Threads Pipe Inch Threads, General purpose Non-Destructive Examination Welding and Brazing Qualifications

Section VIII Division 1, 2 or 3 (as applicable) Pressure Vessels

AWS (American Welding Society) Standard Symbols for Welding, Brazing and Non-Destructive Examination

AWS A2.4 1.3

BASF-YPC, IPS Project Specifications Welding & NDE of Pressure Vessels and Heat Exchangers Positive Material Identification Painting Thermal Insulation. Surface Treatment of Stainless Steels. Welding Core Requirements. General Specification for Equipment Suppliers. Welding of Miscellaneous Equipment. 1? Cr-? Mo. Vessels - Supplementary Requirements Heavy Wall CS Vessels-Supplemental Requirements Vessel Trays - General Structural Data for Mechanical Equipment Lifting Lugs and Trunnions Project Site Design Conditions Sealing Collars on Apparatus with Insulation

40-010-00-0-0-00-002 40-010-00-0-0-00-003 40-010-00-0-0-00-004 40-010-00-0-0-00-005 40-010-00-0-0-00-008 40-010-00-0-0-00-016 40-010-00-0-0-00-017 40-010-00-0-0-00-019 40-010-00-V-0-00-002 40-010-00-V-0-00-003 40-010-00-V-0-00-004 10-010-00-0-0-00-016 40-300-00-V-0-00-013 01-050-00-0-0-00-001 BASF Std. WN 7-082 2.3

BASF-YPC, IPS Project Standard Drawings Non Exit Stair and Grating 1/2 - Typical Details Non Exit Stair and Grating 2/2 – Typical Details Grating and Deck – Typical Details

10-650-00-0-0-00-001 10-650-00-0-0-00-002 10-650-00-0-0-00-003

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 7 of 23

PRESSURE VESSELS PER ASME - GENERAL 10-650-00-0-0-00-004 10-650-00-0-0-00-005 40-300-00-V-0-00-001 40-300-00-V-0-00-002 40-300-00-V-0-00-003 40-300-00-V-0-00-004 40-300-00-V-0-00-005 40-300-00-V-0-00-006 40-300-00-V-0-00-007 40-300-00-V-0-00-008 40-300-00-V-0-00-009 40-300-00-V-0-00-010 40-300-00-V-0-00-012 40-300-00-V-0-00-014 40-300-00-V-0-00-015 2.4 Purchaser Drawings Ladder and Safety Cage 1/2 - Typical Details Ladder and Safety Cage 2/2 - Typical Details DELETED Vertical Vessels Skirt Base Details Support Leg and Base Plate Details Saddle details for Horizontal Vessels Supports for Hot Insulation and FireProofing Supports For Cold Insulation and FireProofing Supports - Vessel Piping Guides - Vessel Piping Hinge and Davit Details for Manholes Vortex Breaker Details Mist Eliminator Details Nameplate and Bracket Detail Earthing Lug

Vessel Drawings and Datasheets 3.0 PRECEDENCE The order of precedence of instructions shall be as follows: · · · IPS Project drawings and datasheets BASF-YPC IPS Project specifications ASME Code

In the event of conflict between documents, Vendor shall immediately notify Purchaser and request a resolution. Vendor is not at liberty to assume which instruction shall govern. 4.0 SUBMITTALS 4.1 General

Vendor drawings, calculations and engineering data submitted to Purchaser shall be in the English language.

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 8 of 23

PRESSURE VESSELS PER ASME - GENERAL The SI system of units shall be used, with the exception that nozzles, pipe fittings and flange sizes shall be expressed in inches. Text in the language of the Vendor may be used provided the English translation is also shown. This translation shall be signed by a certified and approved translator. 4.2 Documents For Review Vendor shall submit (at least) all engineering data listed hereunder for review. Documents shall be in reproducible form and the quality shall allow for microfilming without loss of clarity. Documents shall be signed as checked prior to submittal. Unchecked data will not be accepted for review. Vendor shall not proceed with fabrication until authorized by Purchaser. Review of Vendor's documents by Purchaser does not relieve Vendor of the responsibility for compliance to the applicable codes, standards, Purchaser datasheets, drawings and specifications, or the accuracy of shop dimensions. 4.3 Drawings and documents Drawings and documents, including those of sub Vendors, required for the complete fabrication of pressure vessels, shall be complete and shall include, as a minimum, the following information: · · Item number and P.O. (Purchase Order) number. References - Vendor shall include on the drawings and documents, references to all applicable codes, ASME Code Cases, standards, Purchaser specifications, including date of issue, and the applicable Vendor's standards. When reference is made to Vendor's own standards, copies of all such standards shall be included with the submitted drawings. External design pressure and temperature. Internal design pressure and design temperature. Minimum and maximum working temperature. Minimum Design Metal Temperature (MDMT). MAWP (maximum allowable working pressure) based on the nominal material thickness, in the corroded condition at design temperature and limiting component (internal and external, if applicable). Weld joint efficiencies. Corrosion allowances, if applicable. PWHT requirements if applicable. Hydrostatic test pressure, test water temperature and holding time. Basis for hydrostatic test pressure, and limiting part. Welds shall be either detailed or identified by use of the standard welding symbols of AWS A2.4. NDE (nondestructive examination) symbols shall comply with AWS A2.4. Weld map indicating WPS cross references. Requirements for radiographic examination. Relevant fabrication, inspection, and non-destructive examination requirements. Thickness of all components, including cladding thickness, if applicable. Material specifications for all components. Estimated weight of vessel, empty and full of water. Cleaning, surface preparation, painting, and marking requirements.

· · · · · · · · · · · · · · · · · ·

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BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 9 of 23

PRESSURE VESSELS PER ASME - GENERAL · · ·

Pertinent dimensions, including location of weld seams, nozzle location and projection, location of vessel supports, insulation supports, and other information necessary for a complete description of the vessel. Locations and details of tray supports and nozzles, numbered and lettered identically with Purchaser vessel drawings and sketch. Tray support details. [Tray support design is the responsibility of the tray Supplier]

Vendor shall also submit a separate outline drawing of the pressure vessel, with appropriate markings to cross reference the individual pressure vessel components such as plates, heads, nozzles, forgings, flanges and skirts to the specified mill certificates applicable to all the steels used in the construction of the pressure vessel. 4.4 Calculations Vendor shall submit to Purchaser all required design calculations, signed as checked, for review in due time, enabling him to undertake corrective action if required. In the event Vendor submits computer-generated calculations, those calculations shall show all input data, calculations performed, including all equations and formulae used. The input and output data shall be formatted in a manner that is comprehensible to a person not familiar with the program, its calculation methods and its printout. 5.0 PRODUCTS 5.1 General

Vessels shall be furnished complete as shown on the vessel drawings and as specified. Vendor shall provide full service bolting and 2 each service gaskets for all manholes, handholes, and other flanges for which Vendor provides a blind flange or mating flange. One gasket shall be used for pressure testing and shipping. The unused gasket shall be shipped as a spare. These spare gaskets shall be suitably packaged to prevent damage in transit, clearly marked with the PO number and item number, and be shipped together with the vessel. Gaskets intended for hydrostatic testing shall be identical to the service gaskets, unless indicated otherwise by Purchaser. Vendor shall supply and install all internals and internal piping, unless specified otherwise by means of notices on the drawings, descriptions in documents, instructions by the Purchaser or excluded in the PO. Vendor is responsible for designing and providing bracing as required in order to support internals during shipment. Vendor shall provide and install all clips, attachments and other members that are welded or attached to the inside or outside surface of the vessel or vessel supports. NOTE: Request For Quotations (RFQ's) are generally accompanied by a drawing entitled "Vessel Appurtenances (For Quotation Only)," which outlines exterior clip requirements. This shall be used as the basis for Bidder's quotation for supply and installation of the same. Drawings marked "Approved for Construction" shall specify the requirements and locations of these clips.

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BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 10 of 23

PRESSURE VESSELS PER ASME - GENERAL 6.0 DESIGN 6.1 Design Criteria

In case Purchaser vessel outline drawings indicate any material thickness, this thickness is the minimum thickness, including corrosion allowance, to withstand pressure. Vendor's specified minimum material thickness must not be less than this value. Vendor's analysis shall consider all the applicable loadings during testing, transport, erection and operation, additional to pressure and corrosion, to which the vessel may be subjected. Vendor shall provide additional material on the thickness of any component subject to thinning due to forming or scaling during fabrication. The design pressure specified on the data sheet is the design pressure at the top of the vessel. The design pressure at the bottom of the vessel shall be this pressure plus the hydrostatic head caused by the maximum operating liquid level specified in the data sheet, using a specific gravity as specified or 1.0, whichever is the greater. The Minimum Design Metal Temperature (MDMT) shall be minus 14°C (-14°C) or the lowest possible operating temperature as specified on the data sheets, whichever is the lowest. Pressure vessels shall be designed to undergo hydrostatic tests with water while the vessel is in its operating position. For this, the maximum shell membrane stress in the vessel, as well as in the corroded condition, shall not exceed 90 percent of the specified minimum yield strength for ferritic steels, nor 100 percent of the specified minimum yield strength for austenitic steels or non-ferrous materials. The appropriate weld joint efficiency factor shall be used in these calculations. Integral cladding, weld overlay, or additional thickness provided in excess of thickness required for strength may be considered effective in calculating hydrostatic test stresses only. Credit for cladding thickness or weld overlay shall not be taken for stress calculations. Steam Drums shall be designed for their internal design pressures, and for full vacuum. Vessels and their supports shall be designed to withstand a combination of loads and forces within the limits of allowable stress. Wind and earthquake shall be considered not to occur simultaneously. When the shell thickness is increased due to the effect of external loading e.g. wind forces, re-boiler support, etc., the incremented fraction shall be excluded from the calculations for maximum allowable working pressure (MAWP) or nozzle reinforcement for pressure containment. However, credit may be taken for this to withstand erection loads. The minimum effective outer diameter of a vertical vessel to be considered in determining the overturning moment due to wind shall be: (vessel outside diameter) + (2x vessel insulation thickness) + (outside diameter of the largest piped nozzle, including its insulation thickness). The design metal temperature of internally insulated vessels shall be calculated using the maximum operating fluid temperature, a 43° C ambient temperature and no wind.

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BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 11 of 23

PRESSURE VESSELS PER ASME - GENERAL Horizontal vessels on saddle supports shall be investigated for buckling, local circumferential bending and shear stresses. The method of L.P Zick, shown in ASME Publication, Pressure Vessels and Piping: Design and Analysis, Vol. II, 1972 may be used for this investigation. Vendor shall consider the following loadings: Dead Loads Erection dead load of the vessel shall generally be the weight of the empty vessel without insulation, removable internals, or external attachments. When the vessel is pre-dressed with insulation, internal and external attachments prior to erection, the erection dead load shall include all such additional items. Empty dead load shall be the erection dead load of the vessel fully dressed with insulation, ladders, platforms, etc and with all internals and externals installed. Operating dead load shall be the erection weight plus internals, external attachments, external and internal insulation, and operating fluid weights. Field hydrostatic-test dead load shall be the operating dead load with internal insulation omitted, if applicable, except the vessel shall be filled with test fluid in place of operating contents. Shutdown load shall be equal to the operating dead load at design temperature minus the operating fluid weights. Dynamic Loads The design for wind and earthquake shall be performed in accordance with the requirements of the Code or Standard indicated. The basic wind speed, wind exposure, earthquake zone number and whether or not the design for earthquake is required will be listed on the project data sheet, all in accordance with Spec No. 10-010-00-0-0-00-016 - "Structural Data for Mechanical Equipment". Importance factor shall be specified on vessel drawing. The maximum wind-induced deflection of the vessel shall be 150 mm / 30 meters in operating wind. Operating wind shall be considered to be 66% of maximum wind velocity. Where tower vibrations are predicted, fatigue shall be evaluated for cross wind analysis. For vessels with h/d ratio of 18 or greater, the analysis approach given in ASCE-7 shall be investigated and the method resulting in the higher velocity pressure used for design. Internal details are frequently indicated without being fully designed. This permits Vendor to submit his design for review. It is intended that Vendor shall provide a design based upon the information specified. 6.2 Corrosion Allowance The corrosion allowance shall be 3 mm for carbon and low alloy steel vessels, unless specified otherwise in the Materials of Construction Specification or Mechanical Data Sheet. High alloy steel vessels require no corrosion allowance, unless specified on the data sheet. Corrosion allowance on removable internal parts, except for trays and stainless steel components, shall be 50% of the vessel corrosion allowance applied to all exposed surfaces.

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BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 12 of 23

PRESSURE VESSELS PER ASME - GENERAL Corrosion allowance on non-removable internal parts shall be the same as the vessel corrosion allowance applied to all exposed surfaces, except when specified otherwise. 6.3 Shells and Heads The minimum required plate thickness, excluding corrosion allowance, for shells and heads shall be as follows: Carbon & Low-alloy steels Vessel Diameters ≤ 1200 mm Vessel Diameters > 1200 mm ≥ 2140 mm Vessel Diameters above 2140 mm High alloy steels 5 mm 7 mm 9 5 mm 3 mm

An additional 2 mm thickness shall be added to the above values to give the minimum shell plate thickness for trayed towers. Heads shall be semi-ellipsoidal, unless otherwise specified on the datasheet. Thin heads shall be avoided on agitating vessels where excessive deflection/resonance may occur. Thrust and bending loads for agitator mounting nozzles will be specified by Purchaser. 6.4 Supports Vertical vessels shall be supported on skirts, legs, or lugs. In case a vessel is supported on a skirt attached to the underside of the bottom head, the center-line of the skirt plate and the center-line of the shell plate (after deducting corrosion allowance) shall be approximately coincident. Skirt openings shall be adequately reinforced to prevent buckling. The minimum skirt thickness shall be 6 mm. All skirts shall have vent holes to remove trapped gases. At least four vents shall be provided. The vents shall be minimum 6 inch NPS (150 mm), schedule 80 pipe sleeve, and shall be equally spaced at a maximum of 1800 mm around the skirt circumference. All skirts shall have at least one access opening, unless access is possible from below the vessel. Access openings shall be at least 460 mm inside diameter for vessels with skirts up to 3 m high; and 610 mm by 915 mm obround for vessels with skirts over 3 m high. If the skirt is specified to be fireproofed or insulated, the vents and access hole sleeves shall be of sufficient length so that the ends will be flush with the inner and outer surfaces of the finished installation. During lifting, the skirt shall be temporarily braced to accommodate erection forces, if required. The minimum number of anchor bolts for skirt supported vessels shall be four and thereafter in multiples of four. Unless otherwise specified, these bolts shall straddle the North/South centre-line of the vessel. The minimum size of anchor bolts shall be M18.

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BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 13 of 23

PRESSURE VESSELS PER ASME - GENERAL The thickness of each skirt at the anchor bolt chairs location shall be checked in order to determine its ability to withstand the effects of forces on skirt by bolt chairs. All openings in the skirt shall be reinforced as required to compensate for the loss of material. Drums supported on concrete saddles shall be provided with corrosion plates between the saddle and the vessel. These plates shall be 6 mm thick, shall extend 50 mm beyond the periphery of the bearing area of the concrete saddle and shall be seal-welded to the vessel. A 6 mm weep hole shall be provided in each corrosion plate. This shall be plugged with a sealant immediately after the vessel has been pressure tested. 6.5 Connections, Nozzles, and Flange Nozzle flanges shall be in accordance with ASME B16.5. Flanges larger than the scope of ASME B16.5 shall be in accordance with ASME B16.47 Series A. For flanges outside the scope of these standards, special design shall be in accordance with the ASME Code, Section VIII, Division 1, 2 or 3 as applicable The finish of the gasket contact surface of flange facings shall conform to ASME B16.5. Flanges for non-pressure connections shall be of the flat faced type and may be of light plate construction. Nozzles in portions of vessels with internal gunite linings shall have internal projections such that the nozzle end is flush with the lining. Unless otherwise specified in the ASME Code details, the inside edge of all nozzle necks 3 inches NPS (75 mm) and larger shall be ground to a radius of approximately ? inch (6 mm) with all slag and burrs removed. Pad reinforced nozzles are not permitted whenever the vessel design temperature is 427°C or greater. Flanged connections shall not be inside the skirt of skirt supported vessels. Nozzle necks shall be seamless, except that nozzle necks over 12 inch diameter may be fabricated from plate material (of the same grade of material as specified for the vessel shell or head to which they are attached) and double butt-welded and 100% radiographed. Electric-resistance welded pipes shall not be used as nozzle neck material. Manyway necks may be fabricated from plate material (of the same grade of material as specified for the vessel shell or head to which they are attached), double butt-welded and subjected to the same degree of radiography as the vessel. The bore of nozzle necks and welding neck flanges shall match, or shall be tapered to match in accordance with ASME Code. The minimum thickness after tapering shall not be less than that required by ASME Code. Unless otherwise specified, flanges shall be weld neck or long weld neck type. Slip-on type flanges are not permitted. Special flanges and blind flanges fabricated from plate material shall require prior approval of Purchaser. Flange bolt holes shall straddle natural center-lines as shown on Attachment 01.

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 14 of 23

PRESSURE VESSELS PER ASME - GENERAL Nozzle connections shall be set-in type. Set-on nozzle connections shall have prior approval of Purchaser. Gaskets for raised face flanges shall have the outside diameter and inside diameter conform to the dimensions specified by ASME B16.5, Annex "E." The outside diameter shall extend to the inside edge of the bolts or shall be provided with a centering ring. Couplings larger than 1?" are not permitted on vessels. Openings - Estimated External Piping Loads All nozzles, including vents, drains, instrument and spare nozzles, shall be designed to resist the following estimated external loads and moments due to attached piping based on the formulae below. Nozzles subjected to large forces and moments in excess of those specified below, shall be analyzed for forces and moments listed on the Pressure Vessel datasheets. Assessment shall be in accordance with WRC Bulletins 107 and 297 against 3 times the allowable stress (3Sm). The nozzle/shell reinforcement shall be incremented if found necessary. Each process nozzle shall be capable of withstanding the specified moments and forces from external piping under design conditions which are considered to be acting at the intersection of nozzle and shell in the corroded condition. The indicator “D” in the formulae is the nominal diameter in inches up to a maximum of 60 inches. The ‘b’ value in the formulae depends upon the rating of the nozzle flange as follows:

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 15 of 23

PRESSURE VESSELS PER ASME - GENERAL

Flange Rating 150 lb 300 lb 600 lb 900 lb 1500 lb 2500 lb

‘b’ value Vessels 0.6 0.7 0.8 1.8 3.0 3.3

‘b’ value Heat Exchangers 0.75 0.75 1.25 3.00 4.00 5.60

Nozzle to Shell Loading Longitudinal Bending Moment Circumferential Bending Moment Resultant Bending Moment Torsional Moment Longitudinal Force Circumferential Force Resultant Shear Force Axial Tension or Compression Force (ML) = b x 0.130 x D kNm (M?) = b x 0.100 x D2 kNm (MB) = b x 0.164 x D2 kNm (MT) = b x 0.150 x D2 kNm (FL) = (F?) = (FR) = b x 2.0 x D kN b x 1.5 x D kN b x 2.5 x D kN
2

Nozzle to Head Loading

(MB) = b x 0.164 x D2 kNm (MT) = b x 0.150 x D2 kNm

(FR) = b x 2.5 x D kN (FA) = b x 2.0 x D kN

(FA) = b x 2.0 x D kN

The loads can be expected to apply in the positive and negative directions. Refer to figure in WRC bulletin No. 107 for sign convention. 6.6 Internal Piping Internal pressure piping shall be as required by the service, with due allowance for corrosion on both surfaces. Internal non-pressure piping shall be as follows: · · 6.7 Carbon and low alloy steel (4 to 6 percent Cr-Mo maximum): standard weight, Schedule 40 or ? inch (6.4 mm) nominal wall thickness, whichever is less. High alloy steel (over 4 to 6 percent Cr-Mo) and stainless steel: Schedule 10S or fabricated from No.12 USS gauge sheet. Manholes, Handholes and Inspection Openings

Unless otherwise specified, the following minimum criteria shall apply:

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 16 of 23

PRESSURE VESSELS PER ASME - GENERAL

Vessel Inside Diameter < 300 mm 300 mm ≥ 500 mm 501 mm ≥ 1500 mm > 1500 mm

Item Handhole Handhole Handhole Manway

Size (NPS) (Min.) 2” 3” 4” 18”

No off (Min.) 1 2 2 1

Flanged connections for instruments of listed sizes or larger may be considered as hand holes. Vessels with internals which are not provided with a Manway shall be provided with one end flange (Body/Girth Flange). Davit facilities shall be provided for each blind flange and cover weighing over 34 Kgs. A hand grip shall be furnished inside vessel for each manhole located in a vertical plane. 6.8 Equipment Erection Attachments for erection shall be provided on vertical vessels. Unless otherwise specified by Purchaser, trunnions and tailing lugs shall be provided. Erection attachments shall conform to the following: · · · · To provide for impact, erection attachments shall be designed to support at least twice the dead load of the vessel. Vessel shells shall be analyzed for local buckling, bending, and shear stress imposed during erection. Vessel shell areas and attachment components (including welds) shall be inspected, including ultrasonic examination, to assure that the plates are free of laminations or other defects. Any unacceptable defects shall be repaired. The allowable stresses shall be as follows: (a) Stresses in the shell and other components shall be limited to those listed in Appendix 4 of ASME Section VIII, Division 2. (b) No increase in allowable stress is permitted due to the short duration of the erection loads. Welds used to attach the trunnions shall be no closer than the greater of 25 mm or twice the weld size from the closest weld. Nozzles provided for other purposes may be used for erection trunnions provided they are properly located and designed in accordance with the above requirements. Sealing Collars on Apparatus with Insulation

· · 6.9

For insulated vertical vessels whose insulation has to be protected against the ingress of water, a sealing collar shall be provided in accordance with Specification WN 7-082 (See Attachment 3). The sealing collar must be continuous. Its positioning relative to nozzles in the upper region must always be considered and it must not obstruct the removal of bolts from adjacent nozzle flanges. The thickness of attachment weld shown is across the throat. For severe service conditions, a full penetration weld may be required. Where the weld crosses the over the main vertical shell seam welds, the

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 17 of 23

PRESSURE VESSELS PER ASME - GENERAL latter shall be ground flush with the shell surface and the weld surface, plus 50 mm each side of the weld, shall be radiographed for flaws before performing the attachment weld. Welding electrodes used shall be chosen to suit the shell material The seal must be attached to the vessel prior to any Post Weld Heat Treatment Related insulation support parts in carbon steel or Aluminium must be prevented from being in contact with the shell surface of stainless steel vessels. 7.0 BASIC MATERIALS AND METHODS 7.1 General

Only those materials specified on the vessel drawing or datasheet shall be used for construction, except as provided in item 7.2 (below). The carbon content in carbon steels shall not exceed 0.22 percent. For vessels in low temperature services below -20°C, or for vessels with a design temperature above 250°C, and for alloy or high alloy vessels, the top 500 mm of skirts of vertical vessels shall be of identical material as the bottom head, as a minimum. Saddle wear-plates of horizontal vessels shall be of identical material as the shell. 7.2 Substitutions Substitution of material requires written approval from Purchaser and Owner before being used in construction. A request by Vendor for substitution of materials must be accompanied by the ASME designation or complete data relating to chemical and mechanical properties, including proposed thickness and relevant Code cases. 7.3 Internals Unless otherwise specified, internal flanges shall have heavy hex head bolts and heavy hex nuts of the same type of material as the flanges. Internal flanges may be 150# rating slip-on flanges or be fabricated from steel plate. Internal flange bolting shall be securely tightened. Bolt head and nuts shall be tack welded. Unless otherwise specified, removable internals shall be sectioned to assure to be removable through the nearest, or specified vessel manhole. All baffles, tray support beams or other internals spanning a chord or diameter of the vessel shall be provided with a means of allowing for differential expansion between the part and the vessel shell or be subject to special design consideration. For towers less than 600 mm internal diameter, internals whether trays or packing, shall be designed to permit removal without internal access. The design shall ensure that internal fittings cannot be loosened by vibration or other means.

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 18 of 23

PRESSURE VESSELS PER ASME - GENERAL 7.4 External Pressure Stiffening Rings

When a specific ring size is shown on Purchaser vessel drawings, this size shall be used. When a specific ring size is not indicated, Vendor shall provide rings adequate for the moment of inertia and area specified on Purchaser vessel drawings. 7.5 Bolting

Bolt sizes (including studs and nuts), threads, and marking shall conform to ASME B 1.1 with threads Class 2A External and 2B Internal. Bolts 1 inch in diameter and smaller shall be coarse thread series (UNC). Bolts over 1 inch in diameter shall be 8 Thread Series (8 UN). External bolting for covers, blind flanges, and shell flanges shall be stud bolt, with 2 heavy hex nuts each. However, in cases of pad type openings, stud bolts with 1 hex. nut each are acceptable. Materials shall be as specified on the vessel drawing. Interval bolting materials shall be resistant to the vessels content, including to all materials being bolted to. Internal bolting used for attachment of major beams etc. shall be fitted with double nuts or equivalent locking devices. 7.6 Gaskets Gaskets for raised face flanges shall be spiral-wound metal flat ring gaskets with a nonmetallic filler and a carbon steel solid ring type centering device conforming to the requirements of ASME B16.20. The spiralwound metal shall be AISI type 316 steel for AISI type 316 solid, lined, or clad steel flanges and AISI type 304 for flanges of other solid, lined, or clad steels. The filler material shall be non-asbestos. Gaskets for raised face flanges shall be spiral-wound metal flat ring gaskets with a nonmetallic filler and a carbon steel solid ring type centering device conforming to the requirements of ASME B16.20. The spiralwound metal shall be AISI type 316 steel for AISI type 316 solid, lined, or clad steel flanges and AISI type 304 for flanges of other solid, lined, or clad steels. The filler material shall be non-asbestos. Gaskets for ring joint flanges shall be of the octagonal type conforming to the requirements of ASME B16.20. Gasket materials shall generally be as follows for the indicated flange, flange lining, or flange cladding material: · Carbon and C-? percent Mo steels: low Carbon Iron or low Carbon steel with a maximum Brinell hardness of 120. · ? to 10 percent Cr-Mo and 11 to 13 percent Cr steels: 5 percent Cr-? percent Mo steel with a maximum Brinell hardness of 130. · AISI type 304, 321, and 347 steels: AISI type 304 steel with a maximum Brinell hardness of 160. · AISI type 316 steels: AISI type 316 steel with a maximum Brinell hardness of 160. Gasket material for internal non-pressure connections if required shall be as specified for the service. Asbestos gasket materials are not permitted.

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 19 of 23

PRESSURE VESSELS PER ASME - GENERAL 7.7 Support and External Appurtenances

Materials for external supports and clips welded to the shell or head shall be of the same grade material as the pressure part to which it is attached. 7.8 Accessories Accessories shown on vessel drawings shall be supplied and installed by Vendor unless specifically excluded on the vessel drawing or datasheet. Tray support rings, downcomer bolting bars, beam supports, and all other tray support components which are welded to the vessel, shall be fully in accordance with the Tray Vendor's drawings and Bidder's Quotation for Supply. NOTE: A drawing titled "Tray Support (For Quotation Only)" showing preliminary size and thickness of tray supports, including corrosion allowances, shall be the basis for Bidder's Quotation for Supply. 8.0 FABRICATION AND MANUFACTURE 8.1 General

All vessel seams shall be located to be clear of welded internals, support clips, etc.. For horizontal vessels, vessel seams shall also be located to be clear of saddle supports. All seams in spherical shells and in builtup heads shall be located to be clear of any openings and their reinforcement, unless each weld is 100% radiographed. Longitudinal welded joints shall not be located within the tray downcomer area or behind any plate or obstruction that prevents internal inspection of the weld.. Circumferential welded joints shall be clear of tray support ring welds by at least 25 mm. Wherever possible, reinforcing pads for nozzles and other attachments shall not be located over longitudinal and circumferential welded joints. If this is unavoidable, the welded joint shall be ground smooth and radiographed for its entire covered length, plus 150 mm on each side. Exposed edges of manhole and nozzle necks shall be rounded off at the inside surface of the vessel. A vessel nameplate and bracket shall be provided, in accordance with the details on Drg. No.40-300-00-V0-00-014: 'Nameplate and Bracket Detail'. Fabrication tolerances shall be according to the applicable ASME code and Attachment 02. 8.2 Welding Shell and head joints shall be full penetration, double welded butt joints. Nozzles, manholes, and couplings shall be welded to the shell and heads with double welded full penetration welds unless specifically noted otherwise on Purchaser vessel drawings, or access for back welding from the inside is not feasible. Welding procedure shall be submitted and reviewed , by Purchaser, before any welding fabrication may start.

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 20 of 23

PRESSURE VESSELS PER ASME - GENERAL 8.3 PWHT (Postweld Heat Treatment) Of Welds

In case PWHT is specified, thermocouples shall be firmly attached to the vessel at a minimum of 4.5 m intervals in both longitudinal and circumferential directions, to ensure that the entire vessel is being heated and cooled evenly during the heat treatment operations. Further welding on vessels that have been subject to PWHT is not permitted without prior approval from 8.4 Cleaning and Painting Each vessel shall be thoroughly cleaned inside and outside and shall be free from grease, weld spatter, scale, slag, rust, and any other foreign matter. Vessels that are specified to be primed/painted shall have all exterior surfaces coated including the inside of the skirt and the exterior of the bottom head, fully in accordance with the applicable paint specifications. Painting shall only be applied after hydrostatic testing of the vessel, and shall be fully in accordance with the latest revision of the project Specification for Painting No.40-010-00-0-0-00-004. 9.0 INSPECTION AND TESTING 9.1 General

Materials and work are subject to inspection by Purchaser as well as state, local, and insurance authorities required for Code Stamping. Waiver of any phase of vessel inspection shall be obtained in writing from Purchaser. 9.2 Inspection Vessels constructed of the following materials shall be subjected to a 100 percent radiographic examination: · · · · Carbon steel with a specified minimum tensile strength greater than 485 MPa when the wall thickness is over 19 mm. All Cr-Mo steels when the nominal Cr content is over ? percent. Austenitic steels when the thickness is over 19 mm. Austenitic steels of any thickness when the design metal temperature is over 400°C

When specified, Vessel materials and weldments containing alloying elements other than non-metallic shall undergo Positive Material Identification as per Spec No. 40-010-00-0-0-00-003 9.3 Pressure Tests Vessels shall be tested at the test pressure specified on the vessel drawing. The test procedure shall be in accordance with the ASME Code. When practicable, all pressure vessels shall be subjected to a hydrostatic test. When a field fabricated pressure vessel is to be pneumatically tested, the vessel seams shall be subjected to a 100 percent radiographic examination and all nozzle and attachment welds, except welds attaching welding pins or

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 21 of 23

PRESSURE VESSELS PER ASME - GENERAL studs, shall be subjected to either a magnetic particle or liquid penetrant examination on all exposed surfaces before the pneumatic test is performed. The test medium for hydrostatic testing shall be potable water unless otherwise approved by Purchaser. The maximum chloride content of water used to hydrotest vessels constructed of austenitic stainless steel shall be 25 mg/L. 9.4 Leak Tests Leak test of reinforcing pads shall be performed in accordance with the ASME Code Section V. Each reinforcing pad shall have one test hole, tapped ?" NPS, and located at least 45 degrees off the longitudinal axis of the vessel. This applies to each pad or segment of a multiple piece pad. The welds of each pad or segment shall be given an air and bubble solution pressure test before the test of the vessel. The test pressure shall be at least 0.4 MPa but shall not exceed 0.5 Mpa. All test holes shall be left open for use as tell-tale holes and shall be filled with corrosion inhibiting grease after testing of vessel. For insulated vessels, the Vendor shall furnish and install ?” NPS pipe nipples in tell-tale holes. The length of these nipples shall be approximately 12 mm longer than the insulation thickness. Corrosion inhibiting grease shall be applied in the end of each nipple after testing of the vessel. After completion of the vessel pressure test, additional welding on the pressure-containing part of the vessel is not permitted without prior approval from the Purchaser. 10.0 IDENTIFICATION AND MARKING 10.1 General

Vessels or sections of vessels shall be clearly identified by painting or dye stenciling the PO number and the vessel equipment number in a conspicuous location on the shell head or support. Vertical vessels are to be marked at the base and first 300 mm of the skirt, indicating the North, South, East, and West coordinates of the vessel. These coordinates shall each be indicated with a painted line with subsequent letter for each direction, fully in accordance with the orientations as shown on Purchaser vessel drawing. Identical markings shall be made on the shell, or, if the vessel does not have a skirt, near the bottom tangent line. Horizontal vessels shall have one head marked North, South, East, or West, as shown on the vessel drawings. The centre of gravity shall be marked on all vertical vessels by painting a continuous 75 mm wide circumferential stripe. The letters CG and shipping weight in tons shall be painted at, at least, two locations diametrically opposite and adjacent to the stripe. The location of the centre of gravity specified on Purchaser vessel drawings is that of the vessel as fabricated. Vendor shall make suitable adjustments for shipping supports if they cause the centre of gravity position to move more than 150 mm. The color of paint for marking and lettering shall conspicuously contrast with the vessel surface. Vessels or vessel parts that have been subjected to PWHT (Post Weld Heat Treatment) shall be clearly marked "POST WELD HEAT TREATED. DO NOT FLAME CUT OR WELD THIS VESSEL." The

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 22 of 23

PRESSURE VESSELS PER ASME - GENERAL above requirement shall be clearly marked on the vessel exterior in 150 mm high block letters with a contrasting color and shall be clearly visible. 11.0 PREPARATION FOR SHIPMENT 11.1 General

Preparation for shipment shall be in accordance with Vendor's standards with the following provisions: · Machined surfaces and all threads shall be coated with heavy, rust preventive grease or other approved corrosion preventative. · Flange faces other than those furnished with permanent blinds shall be covered with 10 mm thick plywood or 4 mm steel plate, with an outside diameter identical to the flange, and secured with a minimum of 4 bolts, not less than M12, (unless otherwise noted on the vessel drawings) complete with 3 mm thick rubber gasket. · Welding stub ends shall be protected. · Screwed couplings shall be fitted with bull plugs. Socket-weld couplings shall have plastic caps. · Internal and external parts and piping assembled with the vessel shall be suitably supported and braced to prevent damage during handling and transporting. · Shipping saddles shall be provided when required. · A horizontal vessel may use its welded on saddles for support during shipment. If boot or nozzle projections extend below the saddle base plate, saddle extensions constructed of timber or other suitable materials shall be secured to the saddles to provide adequate ground clearance for the projecting part. · For preparation of vessels for shipment by water, additional requirements may be specified. · Spare gaskets, bolts, nuts etc. and any other loose items shall be boxed separately from the main equipment. Such boxes shall be suitable for site storage and to be clearly and permanently marked with the Clients order number, the part number with reference to which that part belong and all other relevant information required for proper material tracking and identification. · To minimize the risk of stress corrosion, duplex and austenitic steel vessels shall be protected from atmosphere chloride contamination during transport and storage. Stainless steel vessels which are shipped by sea shall be crated and marked "NOT FOR DECK CARGO". In case this may be impracticable due to the size of the equipment or any other valid reason, the equipment shall be suitably be protected by other means, prior to be agreed upon with the Purchaser. 12.0 REQUIREMENTS FOR CODE DATA, MATERIAL AND QUALITY CONTROL RECORDS 12.1 Scope

This section covers the requirements for Vendor’s submittal of code data, material and quality control records for pressure vessels constructed in accordance with the ASME Boiler and Pressure Vessel Code, Section VIII. 12.2 General All required documents shall be assembled as a package for each pressure vessel. Documents that are common to more than one vessel shall be duplicated in each package. The following identification shall be shown on each document:

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40-010-00-V-0-00-001 Date: 2002-09-25 Page 23 of 23

PRESSURE VESSELS PER ASME - GENERAL

· ·

Purchaser Purchase Order Number Purchaser Vessel Equipment Number

All documents shall be in legible reproducible form, and folded to A4 size. 12.3 Requirements · · · · · · · 13.0 "Manufacturer's Data Report" and "Manufacturer's Partial Data Report" as applicable per ASME Code, Section VIII Certified "Manufacturer's Design Report" for each vessel designed in accordance with ASME Code, Section VIII, Division 2 Welding procedure specifications and the results of welding procedure and operator qualification tests. Radiographic film for required radiographic tests and certificates for the results of any required magnetic particle, fluid penetrant, ultrasonic, or other methods of examination. Postweld heat treatment chart Hydrostatic test chart Nameplate rubbing

ATTACHMENTS Attachment 01: Attachment 02: Attachment 03: Figure 1 - Flange Bolt Hole Orientation Figure 2 - Vessel Tolerances (Use conversion factor 1 inch = 25.4 mm) BASF Std. WN 7-082- Sealing Collars on Apparatus with Insulation

--------------End of Specification--------------

D:\Temp\Pressure Vessels-ASME_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40.010.00.V.0.00.001 Date: 2002-09-25 Attachment 01 - Sheet 1 of 1

PRESSURE VESSELS PER ASME - GENERAL Figure 1, Flange Bolt Hole Orientation

D:\Temp\Vessel-ASME Attach#1_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40.010.00.V.0.00.001 Date: 2002-09-25 Attachment 02 - Sheet 1 of 2

PRESSURE VESSELS PER ASME - GENERAL

D:\Temp\Vessel-ASME Attach#2_R5.doc

BASF-YPC Company Ltd. IPS Project Nanjing, China

Specification No. 40.010.00.V.0.00.001 Date: 2002-09-25 Attachment 02 - Sheet 2 of 2

PRESSURE VESSELS PER ASME - GENERAL

D:\Temp\Vessel-ASME Attach#2_R5.doc

BASF Aktiengesellschaft
Works Standard

WN 7-082
Mar 1994

Sealing collars on apparatus with insulation

Dichtkragen an Apparaten mit D?mmung Contents
Page

1 2 3

Scope and field of application ............................................................... 1 Design....................................................................................................... 1 Technical departments ........................................................................... 2

Dimensions in mm

? 1999 BASF Aktiengesellschaft

1 Scope and field of application This works standard applies to the design of sealing collars on insulated apparatus whose insulation has to be protected against the ingress of water on account of the insulating materials used. This applies in all cases to insulating materials used for thermal insulation. Sealing collars are not necessary in the case of materials normally used for low temperature insulation. Sealing collar means, for example, a shaped section welded to the vessel at the transition between upper front face and apparatus shell. 2 Design

Figure 1

Figure 2

Technische Dokumentation und Standardisierung 7-082-eng.doc / 26.04.99

Continued on page 2

WN 7-082 Mar 1994 Page 2

a ≥ 2.5 s, 50 mm min d1 ≤ 2000 mm: t ≥ 3 mm d1 > 2000 mm: t ≥ 4 mm Figure 3: Detail X – Sealing collar at transition upper end – cylindrical shell

Distance ≥ a (bolt length/nut height to be observed)

For dimensions see detail X Figure 4: Detail Y – Sealing collar below flange pair

For apparatus of austenitic CrNi-steel, the sealing collar shall also be made of austenitic CrNi-steel. For unalloyed or low alloyed materials it is recommended to use similar materials. The sealing collar shall be welded to the apparatus shell by means of a fillet welded all round.

3 Technical departments DWY/GI Baubetriebe – Isolierbetrieb Building enterprises – Insulating shop Preparation, performance and inspection of insulating work on technical plants


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