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阀门磁粉检测标准MSS SP53 2002.pdf


MSS SP-53-1999
Reaffirmed 2002

Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components Magnetic Particle Examination Met

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Standard Practice Dev eloped and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Part Street, NE Vienna, Virginia 22180 (703) 281-6613

MSS

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MSS

STANDARD PRACTICE

SP-53

An MSS Standard Practice is intended as a basis for common practice by the manufacturer, the user, and the general public. The existence of an MSS Standard Practice does not in itself preclude the manufacture, sale, or use of products not conforming to the Standard Practice. Mandatory conformance is established only by reference in a code, specification, sales contract, or public law, as applicable. Unless otherwise specifically noted in this MSS SP, any standard referred to herein is identified by the date of issue that was applicable to the referenced standard(s) at the date of issue of this MSS SP. (See Annex A.) In this Standard Practice all notes, annexes, tables, and figures are construed to be essential to the understanding of the message of the standard, and are considered part of the text unless noted as "supplemental". All appendices appearing in this document are construed as "supplemental". "Supplemental" information does not include mandatory requirements. U.S. customary units in this SP are the standard; the metric units are for reference only.

Substantive changes in this 1999 edition are "flagged" by parallel bars as shown on the margins of this paragraph. The specific detail of the change may be determined by comparing the material flagged with that in the previous edition.

Non-toleranced Dimensions in this Standard Practice are nominal, and, unless otherwise specified, shall be considered "for reference only." Any part of this standard may be quoted. Credit lines should read 'extracted from MSS SP-53, 1999, with permission of the publisher, the Manufacturers Standardization Society.' Reproduction prohibited under copyright convention unless written permission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.

Originally Approved February, 1957

Copyright, 1985 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A.

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MSS

STANDARD PRACTICE

SP-53

FOREWORD

The standard practice provides methods and acceptance standards for magnetic particle examination of ferritic steel valves, flanges, fittings and other piping components by use of dry magnetic powder or wet magnetic particles. It is applicable to examination of repairs as well as to initial examination of castings and forgings.

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MSS

STANDARD PRACTICE

SP-53

TABLE O F CO NTENTS

SECTIO N

PAGE

TERMS AND CONDITIONS.................................................................................................. i FOREWORD ........................................................................................................................ ii T ABLE OF CONT ENT S....................................................................................................... iii 1. SCOPE............................................................................................................................ 1 2. DEFINITIONS................................................................................................................ 1 3. PROCEDURES............................................................................................................... 1 4. ACCEPT ANCE ST ANDARDS........................................................................................ 2 5. REFERENCE PHOTOGRAPHS ...................................................................................... 2 6. REMOVAL AND REPAIR OF DISCONT INUIT IES........................................................ 2 T ABLE 1: Acceptance Standards............................................................................................ 3 ANNEX A: Referenced Standards and Applicable Dates.......................................................... 4

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MSS

STANDARD PRACTICE

SP-53

Q UALITY STANDARD FOR STEEL CASTINGS AND FORGINGS FOR VALVES, FLANGES & FITTINGS & OTHER PIPING COMPONENTS 1. SCOPE 1.1 The methods of Section 3.0 provide uniform procedures which will produce satisfactory and consistent results upon which the acceptance standards of Table 1 may be used. 1.2 This examination guide may be used on a voluntary basis or when specified in the inquiry, contract, or order and when mutually agreed upon by the manufacturer and the purchaser. 1.3 This Standard Practice includes the examination of pressure containing castings and forgings. 2. DEFINITIONS 2.1 Pressure Containing Piece - A piece whose failure would permit the contained fluid to escape to the atmosphere. For valves the body and bonnet (cover) and end pieces (of multi-piece valve bodies, e.g., ball valves) shall be considered the pressure containing pieces. 2.2 Indication A detectable magnetic particle accumulation resulting from a distortion of the magnetic field. 2.3 Linear Indication An indication in which the length is more than three times the width. 2.4 Rounded Indication An indication which is circular or elliptical with its length less than three times its width. 2.5 Standard Definitions ASTM E 1316 Terminology Nondestructive Examination. 3. PROCEDURE 3.1 All exterior and accessible interior surfaces of the pressure containing parts shall be examined by the magnetic particle method. Examination may occur prior to machining or after machining at the manufacturer's option. This standard practice may also be used for examination of other parts when mutually agreed upon by the manufacturer and the purchaser. See for

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STANDARD PRACTICE

SP-53

3.2 Magnetic particle procedures and personnel qualification requirements for casting examination shall be in accordance with ASTM E 709. For forging, the examination procedures and personnel qualification requirements shall be in accordance with ASTM A 275/A 275M. 4. ACCEPTANCE STANDARDS Acceptance Standards for magnetic particle indications shall be as shown in Table 1. 5. REFERENCE PHOTOGRAPHS 5.1 Typical Magnetic Particl e Indications are shown in ASTM E 125, Reference Photographs for Magnetic Particle Indications on Ferrous Castings. 5.2 Indications of weld discontinuities illustrated in ASTM E 125 are merely examples of discontinuites in weld repairs and not degree of severity. 5.3 The ten examples of false indications and magnetic anomalies illustrated in ASTM E 125 are necessary as a guide to the type of indications and not necessarily indicative of any conditions concerning integrity or usefulness under the scope of quality herein defined. It is recognized that in some instances surveys by methods other than magnetic particle examination may be necessary to establish what indications belong to these categories.

6. REMOVAL AND REPAIR OF DISCONTINUITIES 6.1 Parts rejected through the application of these standards may be repaired. If welding is required, it shall be in accordance with the requirement specified in the applicable steel casting or forging specifications. 6.2 Discontinuities in excess of those represented by acceptable indications shall be removed by suitable means. If removal of surface discontinuities to an acceptable level does not result in reducing the wall thickness below the acceptable minimum, the area shall be blended smoothly into surrounding surface. Where removal of discontinuities results in a wall thickness below the acceptable minimum, the resultant cavity may be repaired by welding. Welded areas shall be blended smoothly into surrounding surface. 6.3 Areas which as a result of magnetic particle examination, have been weld repaired or from which discontinuities have been removed without requirement for weld repair, shall be re-examined by the magnetic particle method. 6.4 The acceptance standards for magnetic particle re-examination required under Section 6.3 shall be as shown in Table 1.

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MSS

STANDARD PRACTICE

SP-53

TABLE 1 - ACCEPTANCE STANDARDS A. Castings Maximum acceptable indications are as follows: Linear indications as defined in Subsection 2.3 0.3" ( 8 mm) long for materials up to 0.5" (13 mm) thick 0.5" (13 mm) long for materials 0.5" to 1" (13 mm to 25 mm) thick 0.7" (18 mm) long for materials over 1" (25 mm) thick For linear indications, the indications must be separated by a distance greater than the length of an acceptable indication. Rounded indications as defined in Subsection 2.4 0.3" ( 8 mm) dia. for materials up to 0.5" (13 mm) thick 0.5" (13 mm) dia. for materials over 0.5" (13 mm) thick Four or more rounded indications in a line separated by 0.06" (2 mm) or less edge to edge are unacceptable. B. Forgings Maximum acceptable indications are as follows: Linear indentions as defined in Subsection 2.3 0.2" ( 5 mm) long for materials 0.5" (13 mm) or less thick 0.4" (10 mm) long for materials 0.5" to 1" (13 mm to 25 mm) thick 0.6" (15 mm) long for materials over 1" (25 mm) thick For linear indications, the indications must be separated distance greater than the length of an acceptable indication. Rounded indications as defined in Subsection 2.4 0.2" (5 mm) dia. for materials up to 0.5" (13 mm) thick 0.3" (8 mm) dia. for materials over 0.5" (13 mm) thick Four or more rounded indications in a line separated by 0.06" (2 mm) or less edge to edge are unacceptable. by a

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STANDARD PRACTICE

SP-53

ANNEX A REFERENCE STANDARDS AND APPLICABLE DATES This Annex is an integral part of this Standard Practice and is placed after the main text for convenience. Standard Name or Description

ASTM A 275/A 275 M-1996 Standard Test Method for Magnetic Particle Examination of steel castings

E 125-1997 Standard Reference Photographs for Magnetic Particle Indications on Ferrous Castings E 709-1995 Examination E 1316-1997b Examination Standard Guide for Magnetic Particle

Standard Terminology for Nondestructive

Publications of the following organization appear in the above list. ASTM 19428-2959 American Society for Testing and Materials 100 Barr Harbor Drive, West Conshohocken, PA

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List of MSS Standard Practices (Price List Available Upon Request)
Number SP-6-2001 SP-9-2001 SP-25-1998 SP-42-1999 SP-43-1991 SP-44-1996 SP-45-1998 SP-51-2000 SP-53-1999 Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings Spot Facing for Bronze, Iron and Steel Flanges Standard Marking System for Valves, Fittings, Flanges and Unions Class 150 Corrosion Resistant Gate, Globe, Angle and Check Valves with Flanged and Butt Weld Ends (R 01) Wrought Stainless Steel Butt-Welding Fittings (R 01) Steel Pipeline Flanges Bypass and Drain Connections Class 150LW Corrosion Resistant Cast Flanges and Flanged Fittings (R 02) Quality Standard for Steel Castings and Forgings for Valves. Flanges and Fittings and Other Piping Components - Magnetic Particle Examination Method SP-54-1999 (R 02) Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Piping Components - Radiographic Examination Method SP-55-2001 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual Method for Evaluation of Surface Irregularities SP-58-1993 Pipe Hangers and Supports - Materials, Design and Manufacture SP-60-1999 Connecting Flange Joint Between Tapping Sleeves and Tapping Valves SP-61-1999 Pressure Testing of Steel Valves SP-65-1999 High Pressure Chemical Industry Flanges and Threaded Stubs for Use with Lens Gaskets SP-67-2002 Butterfly Valves SP-68-1997 High Pressure Butterfly Valves with Offset Design SP-69-1996 Pipe Hangers and Supports - Selection and Application SP-70-1998 Cast Iron Gate Valves, Flanged and Threaded Ends SP-71-1997 Gray Iron Swing Check Valves, Flanged and Threaded Ends SP-72-1999 Ball Valves with Flanged or Butt Welding Ends for General Service SP-73-1991 (R 96) Brazing Joints for Wrought and Cast Copper Alloy Solder Joint Pressure Fittings SP-75-1998 Specification for High Test Wrought Butt Welding Fittings SP-77-1995 (R 00) Guidelines for Pipe Support Contractual Relationships SP-78-1998 Cast Iron Plug Valves, Flanged and Threaded Ends SP-79-1999a Socket-Welding Reducer Inserts SP-80-1997 Bronze Gate, Globe, Angle and Check Valves SP-81-2001 Stainless Steel, Bonnetless, Flanged Knife Gate Valves SP-82-1992 Valve Pressure Testing Methods SP-83-2001 Class 3000 Steel Pipe Unions, Socket Welding and Threaded SP-85-1994 Cast Iron Globe & Angle Valves, Flanged and Threaded Ends SP-86-2002 Guidelines for Metric Data in Standards for Valves, Flanges, Fittings and Actuators SP-88-1993 (R 01) Diaphragm Valves SP-89-1998 Pipe Hangars and Supports - Fabrication and Installation Practices SP-90-2000 Guidelines on Terminology for Pipe Hangers and Supports SP-91-1992 (R 96) Guidelines for Manual Operations of Valves SP-92-1999 MSS Valve User Guide SP-93-1999 Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components-Liquid Penetrant Examination Method SP-94-1999 Quality Std for Ferritic and Martensitic Steel Castings for Valves, Flanges, and Fittings and Other Piping Components-Ultrasonic Examination Method SP-95-2000 Swage(d) Nipples and Bull Plugs SP-96-2001 Guidelines on Terminology for Valves and Fittings SP-97-2001 Integrally Reinforced Forged Branch Outlet Fittings-Socket Welding. Threaded, and Buttwelding Ends SP-98-2001 Protective Coatings for the Interior of Valves, Hydrants, and Fittings SP-99-1994 (R 01) Instrument Valves SP-100-1997 Qualification Requirements for Elastomer Diaphragms for Nuclear Diaphragm Type Valves SP-101-1989 (R 01) Part-Turn Valve Actuator Attachment-Flange and Driving Component Dimensions and Performance Characteristics SP-102-1989 (R 01) Multi-Turn Valve Actuator Attachment - Flange and Driving Component Dimensions and Performance Characteristics SP-103-1995 (R 00) Wrought Copper and Copper Alloy Insert Fittings for Polybutylene Systems SP-104-1995 Wrought Copper Solder Joint Pressure Fittings SP-105-1996 (R 01) Instrument Valves for Code Applications SP-106-1990 (R 96) Cast Copper Alloy Flanges and Flanged Fittings, Class 125, 150 and 300 SP-107-1991 (R 00) Transition Union Fittings for Joining Metal and Plastic Products SP-108-2002 Resilient-Seated Cast-Iron Eccentric Plug Valves SP-109-1997 Welded Fabricated Copper Solder Joint Pressure Fittings SP-110-1996 Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends SP-111-2001 Gray-Iron and Ductile-Iron Tapping Sleeves SP-112-1999 Quality Standard for Evaluation of Cast Surface Finishes - Visual and Tactile Method. This SP must be sold with a 10-surface, three dimensional Cast Surface Comparator, which is a necessary part of the Standard. Additional Comparators may be sold separately at $25.00 each. Same quantity discounts apply on total order. SP-113-2001 Connecting Joint between Tapping Machines and Tapping Valves SP-114-2001 Corrosion Resistant Pipe Fittings Threaded and Socket Welding, Class 150 and 1000 SP-115-1999 Excess Flow Valves 1 1/4 NPS and Smaller, for Natural Gas Service SP-116-1996 Service Line Valves and Fittings for Drinking Water Systems SP-117-2002 Bellows Seals for Globe and Gate Valves SP-118-1996 Compact Steel Globe & Check Valves - Flanged, Flangeless, Threaded & Welding Ends (Chemical & Petroleum Refinery Service) SP-119-1996 Belled End Socket Welding Fittings, Stainless Steel and Copper Nickel SP-120-1997 Flexible Graphite Packing System for Rising Stem Steel Valves (Design Requirements) SP-121-1997 Qualification Testing Methods for Stem Packing for Rising Stem Steel Valves SP-122-1997 Plastic Industrial Ball Valves SP-123-1998 Non-Ferrous Threaded and Solder-Joint Unions for Use With Copper Water Tube SP-124-2001 Fabricated Tapping Sleeves SP-125-2000 Gray Iron and Ductile Iron In-Line, Spring-Loaded, Center-Guided Check Valves SP-126-2000 Steel In-Line Spring-Assisted Center Guided Check Valves SP-127-2001 Bracing for Piping Systems Seismic-Wind-Dynamic Design, Selection, Application (R YEAR) Indicates year standard reaffirmed without substantive changes A large number of former MSS Practices have been approved by the ANSI or ANSI Standards, published by others In order to maintain a single source of authoritative information, the MSS withdraws its Standard Practice in such cases

Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, N.E., Vienna, VA 22180-4620 (703) 281-6613 Fax # (703) 281-6671

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