Designation: A 333/A 333M – 99
An American National Standard
Standard Speci?cation for
Seamless and Welded Steel Pipe for Low-Temperature Service1
tandard is issued under the ?xed designation A 333/A 333M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 1.1 This speci?cation2 covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several grades of ferritic steel are included as listed in Table 1. Some product sizes may not be available under this speci?cation because heavier wall thicknesses have an adverse affect on low-temperature impact properties. 1.2 Supplementary Requirement S1 of an optional nature is provided. This shall apply only when speci?ed by the purchaser. 1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the speci?cation. The inch-pound units shall apply unless the “M” designation of this speci?cation is speci?ed in the order.
NOTE 1—The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”
E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation6 3. Ordering Information 3.1 Orders for material under this speci?cation should include the following, as required, to describe the material adequately: 3.1.1 Quantity (feet, centimetres, or number of lengths), 3.1.2 Name of material (seamless or welded pipe), 3.1.3 Grade (Table 1), 3.1.4 Size (NPS or outside diameter and schedule number of average wall thickness), 3.1.5 Length (speci?c or random), (Section 12) (Permissible Variations in Length Section of Speci?cation A 530/A 530M), 3.1.6 End ?nish (Ends Section of Speci?cation A 530/ A 530M), 3.1.7 Optional requirements, (Heat analysis requirement in the Chemical composition Section of A 530/A530M; 4.2.5 stress relieving; 10 repair by welding, 14.1.1 other temperatures for impact test; 15 hydrostatic test or nondestructive electric test), 3.1.8 Test report required, (Certi?cation Section of Speci?cation A 530/A 530M), 3.1.9 Speci?cation designation, and 3.1.10 Special requirements or exceptions to this speci?cation. 4. Materials and Manufacture 4.1 Manufacture—The pipe shall be made by the seamless or welding process with the addition of no ?ller metal in the welding operation. Grade 4 shall be made by the seamless process.
NOTE 2—For electric-fusion-welded pipe, with ?ller metal added, see Speci?cation A 671.
2. Referenced Documents 2.1 ASTM Standards: A 370 Test Methods and De?nitions for Mechanical Testing of Steel Products3 A 530/A530M Speci?cation for General Requirements for Specialized Carbon and Alloy Steel Pipe4 A 671 Speci?cation for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures4 E 23 Test Methods for Notched Bar Impact Testing of Metallic Materials5 E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing6
This speci?cation is under the jurisdiction of ASTM Committee A-1 on Steel, Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee A01.10 on Tubing. Current edition approved Jan. 10, 1999. Published May 1999. Originally published as A 333 – 50 T. Last previous edition A 333/A 333M – 98. 2 For ASME Boiler and Pressure Vessel Code applications see related Speci?cation SA-333 in Section II of that Code. 3 Annual Book of ASTM Standards, Vol 01.03. 4 Annual Book of ASTM Standards, Vol 01.01. 5 Annual Book of ASTM Standards, Vol 03.01. 6 Annual Book of ASTM Standards, Vol 03.03.
4.2 Heat Treatment: 4.2.1 All seamless and welded pipe, other than Grades 8 and 11, shall be treated to control their microstructure in accordance with one of the following methods: 184.108.40.206 Normalize by heating to a uniform temperature of not less than 1500°F [815°C] and cool in air or in the cooling chamber of an atmosphere controlled furnace. 220.127.116.11 Normalize as in 18.104.22.168, and, at the discretion of the manufacturer, reheat to a suitable tempering temperature. 22.214.171.124 For the seamless process only, reheat and control hot
Copyright ? ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
A 333/A 333M
TABLE 1 Chemical Requirements
Element Grade 1A Carbon, max Manganese Phosphorus, max Sulfur, max Silicon Nickel Chromium Copper Aluminum Vanadium, max Columbium, max Molybdenum, max Cobalt
Composition, % Grade 3 0.19 0.31–0.64 0.025 0.025 0.18–0.37 3.18–3.82 ... ... ... ... ... ... ... Grade 4 0.12 0.50–1.05 0.025 0.025 0.08–0.37 0.47–0.98 0.44–1.01 0.40–0.75 0.04–0.30 ... ... ... ... Grade 6A 0.30 0.29–1.06 0.025 0.025 0.10 min ... ... ... ... ... ... ... ... Grade 7 0.19 0.90 max 0.025 0.025 0.13–0.32 2.03–2.57 ... ... ... ... ... ... ... Grade 8 0.13 0.90 max 0.025 0.025 0.13–0.32 8.40–9.60 ... ... ... ... ... ... ... Grade 9 0.20 0.40–1.06 0.025 0.025 ... 1.60–2.24 ... 0.75–1.25 ... ... ... ... ... Grade 10 0.20 1.15–1.50 0.035 0.015 0.10–0.35 0.25 max 0.15 max 0.15 max 0.06 max 0.12 0.05 0.05 ... Grade 11 0.10 0.60 max 0.025 0.025 0.35 max 35.0–37.0 0.50 max ... ... ... ... 0.50 max 0.50 max
0.30 0.40–1.06 0.025 0.025 ... ... ... ... ... ... ... ... ...
For each reduction of 0.01 % carbon below 0.30 %, an increase of 0.05 % manganese above 1.06 % would be permitted to a maximum of 1.35 % manganese.
working and the temperature of the hot-?nishing operation to a ?nishing temperature range from 1550 to 1750°F [845 to 945°C] and cool in air or in a controlled atmosphere furnace from an initial temperature of not less than 1550°F [845°C]. 126.96.36.199 Treat as in 188.8.131.52 and, at the discretion of the manufacturer, reheat to a suitable tempering temperature. 184.108.40.206 Seamless pipe of Grades 1, 6, and 10 may be heat treated by heating to a uniform temperature of not less than 1500°F [815°C], followed by quenching in liquid and reheating to a suitable tempering temperature, in place of any of the other heat treatments provided for in 4.2.1. 4.2.2 Grade 8 pipe shall be heat treated by the manufacturer by either of the following methods: 220.127.116.11 Quenched and Tempered—Heat to a uniform temperature of 1475 6 25°F [800 6 15°C]; hold at this temperature for a minimum time in the ratio of 1 h/in. [2 min/mm] of thickness, but in no case less than 15 min; quench by immersion in circulating water. Reheat until the pipe attains a uniform temperature within the range from 1050 to 1125°F [565 to 605°C]; hold at this temperature for a minimum time in the ratio of 1 h/in. [2 min/mm] of thickness, but in no case less than 15 min; cool in air or water quench at a rate no less than 300°F [165°C]/h. 18.104.22.168 Double Normalized and Tempered— Heat to a uniform temperature of 1650 6 25°F [900 6 15°C]; hold at this temperature for a minimum time in the ratio of 1 h/in. [2 min/mm] of thickness, but in no case less than 15 min; cool in air. Reheat until the pipe attains a uniform temperature of 1450 6 25°F [790 6 15°C]; hold at this temperature for a minimum time in the ratio of 1 h/in. [2 min/mm] of thickness, but in no case less than 15 min; cool in air. Reheat to a uniform temperature within the range from 1050 to 1125°F [565 to 605°C]; hold at this temperature for a minimum time of 1 h/in. [2 min/mm] of thickness but in no case less than 15 min; cool in air or water quench at a rate not less than 300°F [165°C]/h. 4.2.3 Whether to anneal Grade 11 pipe is per agreement between purchaser and supplier. When Grade 11 pipe is annealed, it shall be normalized in the range of 1400 to 1600°F [760 to 870°C]. 4.2.4 Material from which test specimens are obtained shall be in the same condition of heat treatment as the pipe furnished. Material from which specimens are to be taken shall be heat treated prior to preparation of the specimens.
4.2.5 When speci?ed in the order the test specimens shall be taken from full thickness test pieces which have been stress relieved after having been removed from the heat-treated pipe. The test pieces shall be gradually and uniformly heated to the prescribed temperature, held at that temperature for a period of time in accordance with Table 2, and then furnace cooled at a temperature not exceeding 600°F [315°C]. Grade 8 shall be cooled at a minimum rate of 300°F [165°C]/h in air or water to a temperature not exceeding 600°F [315°C]. 5. Chemical Composition 5.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 1. 5.2 When Grades 1, 6, or 10 are ordered under this speci?cation, supplying an alloy grade that speci?cally requires the addition of any element other than those listed for the ordered grade in Table 1 is not permitted. However, the addition of elements required for the deoxidation of the steel is permitted. 6. Product Analysis 6.1 At the request of the purchaser, an analysis of one billet or two samples of ?at-rolled stock from each heat or of two pipes from each lot shall be made by the manufacturer. A lot of pipe shall consist of the following:
TABLE 2 Stress Relieving of Test Pieces
Metal TemperatureA,B Grades 1, 3, 6, 7, and 10 °F 1100 1050 1000 °C 600 565 540 Grade 4C °F 1150 1100 1050 °C 620 600 565 1 [2.4] 2 [4.7] 3 [7.1] Minimum Holding Time, h/in. [min/mm] of Thickness
A For intermediate temperatures, the holding time shall be determined by straight-line interpolation. B Grade 8 shall be stress relieved at 1025 to 1085°F, [550 to 585°C], held for a minimum time of 2 h for thickness up to 1.0 in. [25.4 mm], plus a minimum of 1 h for each additional inch [25.4 mm] of thickness and cooled at a minimum rate of 300°F [165°C]/h in air or water to a temperature not exceeding 600°F [315°C]. C Unless otherwise speci?ed, Grade 4 shall be stress relieved at 1150°F [620°C].
A 333/A 333M
NPS Designator Under 2 2 to 6 Over 6 Length of Pipe in Lot 400 or fraction thereof 200 or fraction thereof 100 or fraction thereof
6.2 The results of these analyses shall be reported to the purchaser or the purchaser’s representative and shall conform to the requirements speci?ed. 6.3 If the analysis of one of the tests speci?ed in 6.1 does not conform to the requirements speci?ed, an analysis of each billet or pipe from the same heat or lot may be made, and all billets or pipe conforming to the requirements shall be accepted. 7. Tensile Requirements 7.1 The material shall conform to the requirements as to tensile properties prescribed in Table 3. 8. Impact Requirements 8.1 For Grades 1, 3, 4, 6, 7, 9, and 10, the notched-bar impact properties of each set of three impact specimens, including specimens for the welded joint in welded pipe with wall thicknesses of 0.120 in. [3 mm] and larger, when tested at temperatures in conformance with 14.1 shall be not less than the values prescribed in Table 4. The impact test is not required for Grade 11. 8.1.1 If the impact value of one specimen is below the minimum value, or the impact values of two specimens are less than the minimum average value but not below the minimum value permitted on a single specimen, a retest shall be allowed. The retest shall consist of breaking three additional specimens and each specimen must equal or exceed the required average value. When an erratic result is caused by a defective specimen, or there is uncertainty in test procedures, a retest will be allowed. 8.2 For Grade 8 each of the notched bar impact specimens shall display a lateral expansion opposite the notch of not less than 0.015 in. [0.38 mm]. 8.2.1 When the average lateral expansion value for the three impact specimens equals or exceeds 0.015 in. [0.38 mm] and the value for one specimen is below 0.015 in. [0.38 mm] but not below 0.010 in. [0.25 mm], a retest of three additional specimens may be made. The lateral expansion of each of the retest specimens must equal or exceed 0.015 in. [0.38 mm]. 8.2.2 Lateral expansion values shall be determined by the procedure in Test Methods and De?nitions A 370. 8.2.3 The values of absorbed energy in foot-pounds and the fracture appearance in percentage shear shall be recorded for information. A record of these values shall be retained for a period of at least 2 years. 9. Lengths 9.1 If de?nite lengths are not required, pipe may be ordered in single random lengths of 16 to 22 ft (Note 3) with 5 % 12 to 16 ft (Note 4), or in double random lengths with a minimum average of 35 ft (Note 4) and a minimum length of 22 ft (Note 4) with 5 % 16 to 22 ft (Note 3).
NOTE 3—This value(s) applies when the inch-pound designation of this speci?cation is the basis of purchase. When the “M” designation of this speci?cation is the basis of purchase, the corresponding metric value(s) shall be agreed upon between the manufacturer and purchaser.
10. Workmanship, Finish, and Appearance 10.1 The pipe manufacturer shall explore a sufficient number of visual surface imperfections to provide reasonable assurance that they have been properly evaluated with respect to depth. Exploration of all surface imperfections is not required but may be necessary to assure compliance with 11.2. 10.2 Surface imperfections that penetrate more than 12 1?2 % of the nominal wall thickness or encroach on the minimum wall thickness shall be considered defects. Pipe with such defects shall be given one of the following dispositions: 10.2.1 The defect may be removed by grinding provided that the remaining wall thickness is within speci?ed limits. 10.2.2 Repaired in accordance with the repair welding provisions of 10.5. 10.2.3 The section of pipe containing the defect may be cut off within the limits of requirements on length. 10.2.4 The defective pipe may be rejected. 10.3 To provide a workmanlike ?nish and basis for evaluating conformance with 10.2, the pipe manufacturer shall remove by grinding the following: 10.3.1 Mechanical marks, abrasions and pits, any of which imperfections are deeper than 1?16 in. [1.6 mm], and 10.3.2 Visual imperfections commonly referred to as scabs, seams, laps, tears, or slivers found by exploration in accordance with 10.1 to be deeper than 5 % of the nominal wall thickness. 10.4 At the purchaser’s discretion, pipe shall be subject to rejection if surface imperfections acceptable under 10.2 are not scattered, but appear over a large area in excess of what is considered a workmanlike ?nish. Disposition of such pipe shall be a matter of agreement between the manufacturer and the purchaser. 10.5 When imperfections or defects are removed by grinding, a smooth curved surface shall be maintained, and the wall thickness shall not be decreased below that permitted by this speci?cation. The outside diameter at the point of grinding may be reduced by the amount so removed. 10.5.1 Wall thickness measurements shall be made with a mechanical caliper or with a properly calibrated nondestructive testing device of appropriate accuracy. In case of dispute, the measurement determined by use of the mechanical caliper shall govern. 10.6 Weld repair shall be permitted only subject to the approval of the purchaser and in accordance with Speci?cation A 530/A 530M. 10.7 The ?nished pipe shall be reasonably straight. 11. General Requirements 11.1 Material furnished to this speci?cation shall conform to the applicable requirements of the current edition of Speci?cation A 530/A 530M unless otherwise provided herein. 12. Mechanical Required 12.1 Transverse or Longitudinal Tensile Test and Flattening Test—For material heat treated in a batch-type furnace, tests shall be made on 5 % of the pipe from each lot. When heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5 % of the lot, but in no case less than 2 pipes.
A 333/A 333M
TABLE 3 Tensile Requirements
Grade 1 psi Tensile strength, min Yield strength, min 55 000 30 000 MPa 380 205 Grade 3 psi 65 000 35 000 MPa 450 240 Grade 4 psi 60 000 35 000 MPa 415 240 Grade 6 psi 60 000 35 000 MPa 415 240 Grade 7 psi 65 000 35 000 MPa 450 240 Grade 8 psi 100 000 75 000 MPa 690 515 Grade 9 psi 63 000 46 000 MPa 435 315 Grade 10 psi 80 000 65 000 MPa 550 450 Grade 11 psi MPa
65 000 450 35 000 240 Longitudinal
Longi- Trans- Longi- Trans- Longi- Trans- Longi- Trans- Longi- Trans- Longi- Trans- Longi- Trans- Longi- Transtudinal verse tudinal verse tudinal verse tudinal verse tudinal verse tudinal verse tudinal verse tudinal verse Elongation in 2 in. or 50 mm, (or 4D), min, %: 35 Basic minimum elongation for walls 5?16 in. [8 mm] and over in thickness, strip tests, and for all small sizes tested in full section When standard round 28 2-in. or 50-mm gage length or proportionally smaller size test specimen with the gage length equal to 4D (4 times the diameter) is used For strip tests, a de- 1.75B duction for each 1?32 in. [0.8 mm] decrease in wall thickness below 5?16 in. [8 mm] from the basic minimum elongation of the following percentage Wall Thickness Grade 1 in. (0.312) (0.281) 1?4 (0.250) 7?32 (0.219) 3?16 (0.188) 5?32 (0.156) 1?8 (0.125) 3?32 (0.094) 1?16 (0.062)
5 16 9 32
Elongation in 2 in. or 50 mm, min, %C Grade 3 Longitudinal 30 28 27 26 24 22 21 20 18 Transverse 20 19 18 ... ... ... ... ... ... Grade 4 Longitudinal 30 28 27 26 24 22 21 20 18 Transverse 16 15 15 ... ... ... ... ... ... Grade 6 Longitudinal 30 28 27 26 24 22 21 20 18 Transverse 16 15 15 ... ... ... ... ... ... Grade 7 Longitudinal 30 28 27 26 24 22 21 20 18 Transverse 22 21 20 ... ... ... ... ... ... Grade 8 Longitudinal 22 21 20 18 17 16 15 13 12 Transverse ... ... ... ... ... ... ... ... ... Grade 9 Longitudinal 28 26 25 24 22 20 19 18 16 Transverse ... ... ... ... ... ... ... ... ... Grade 10 Longitudinal 22 21 20 18 17 16 15 13 12 Transverse ... ... ... ... ... ... ... ... ...
mm 8 7.2 6.4 5.6 4.8 4 3.2 2.4 1.6
Longitudinal 35 33 32 30 28 26 25 23 21
Transverse 25 24 23 ... ... ... ... ... ...
Elongation of Grade 11 is for all walls and small sizes tested in full section. The following table gives the calculated minimum values C Calculated elongation requirements shall be rounded to the nearest whole number. Note—The preceding table gives the computed minimum elongation values for each 1?32-in. [0.80-mm] decrease in wall thickness. Where the wall thickness lies between two values shown above, the minimum elongation value is determined by the following equation:
Grade 1 3 4 6 7 8 and 10 9
Direction of Test Longitudinal Transverse Longitudinal Transverse Longitudinal Transverse Longitudinal Transverse Longitudinal Transverse Longitudinal Longitudinal E E E E E E E E E E E E = = = = = = = = = = = = 56t 40t 48t 32t 48t 32t 48t 32t 48t 32t 40t 48t + + + + + + + + + + + +
Equation 17.50 [E = 2.19t + 17.50] 12.50 [E = 1.56t + 12.50] 15.00 [E = 1.87t + 15.00] 10.00 [E = 1.25t + 10.00] 15.00 [E = 1.87t + 15.00] 6.50 [E = 1.25t+ 6.50] 15.00 [E = 1.87t + 15.00] 6.50 [E = 1.25t + 6.50] 15.00 [E = 1.87t + 15.00] 11.00 [E = 1.25t + 11.00] 9.50 [E = 1.56t + 9.50] 13.00 [E = 1.87t + 13.00]
where: E = elongation in 2 in. or 50 mm, in %, and t = actual thickness of specimen, in. [mm].
NOTE 4—The term “lot” applies to all pipe of the same nominal size and wall thickness (or schedule) which is produced from the same heat of
steel and subjected to the same ?nishing treatment in a continuous furnace. When ?nal heat treatment is in a batch-type furnace, the lot shall
A 333/A 333M
TABLE 4 Impact Requirements for Grades 1, 3, 4, 6, 7, 9, and 10
Size of Specimen, mm Minimum Average Notched Bar Impact Value of Each Set of Three SpecimensA ft·lbf 10 10 10 10 10 10 by by by by by by 10 7.5 6.67 5 3.33 2.5 13 10 9 7 5 4 J 18 14 12 9 7 5 Minimum Notched Bar Impact Value of One Specimen Only of a SetA ft·lbf 10 8 7 5 3 3 J 14 11 9 7 4 4
axis of the pipe with the notch of the specimen in the welded joint and perpendicular to the surface. When diameter and thickness do not permit obtaining transverse specimens, longitudinal specimens in accordance with 13.2 shall be obtained; the bottom of the notch shall be located at the weld joint. 14. Impact Test 14.1 Except when the size of the ?nished pipe is insufficient to permit obtaining subsize impact specimens, all material furnished to this speci?cation and marked in accordance with Section 16 shall be tested for impact resistance at the minimum temperature for the respective grades as shown in Table 5. 14.1.1 Special impact tests on individual lots of material may be made at other temperatures as agreed upon between the manufacturer and the purchaser. 14.1.2 When subsize Charpy impact specimens are used and the width along the notch is less than 80 % of the actual wall thickness of the original material, the speci?ed Charpy impact test temperature for Grades 1, 3, 4, 6, 7, 9, and 10 shall be lower than the minimum temperature shown in Table 5 for the respective grade. Under these circumstances the temperature reduction values shall be by an amount equal to the difference (as shown in Table 6) between the temperature reduction corresponding to the actual material thickness and the temperature reduction corresponding to the Charpy specimen width actually tested. Appendix X1 shows some examples of how the temperature reductions are determined. 14.2 The notched bar impact test shall be made in accordance with the procedure for the simple beam, Charpy-type test of Methods E 23. 14.3 Impact tests speci?ed for temperatures lower than 70°F [20°C] should be made with the following precautions. The impact test specimens as well as the handling tongs shall be cooled a sufficient time in a suitable container so that both reach the desired temperature. The temperature shall be measured with thermocouples, thermometers, or any other suitable devices and shall be controlled within 3°F [2°C]. The specimens shall be quickly transferred from the cooling device to the anvil of the Charpy impact testing machine and broken with a time lapse of not more than 5 s. 15. Hydrostatic or Nondestructive Electric Test 15.1 Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise
TABLE 5 Impact Temperature
Grade Minimum Impact Test Temperature °F 1 3 4 6 7 8 9 10 ?50 ?150 ?150 ?50 ?100 ?320 ?100 ?75 °C ?45 ?100 ?100 ?45 ?75 ?195 ?75 ?60
Straight line interpolation for intermediate values is permitted.
include only that pipe which is heat treated in the same furnace charge.
12.2 Hydrostatic Test—Each length of pipe shall be subjected to the hydrostatic test. 12.3 Impact Test—One notched bar impact test, consisting of breaking three specimens, shall be made from each heat represented in a heat-treatment load on specimens taken from the ?nished pipe. This test shall represent only pipe from the same heat and the same heat-treatment load, the wall thicknesses of which do not exceed by more than 1?4 in. [6.3 mm] the wall thicknesses of the pipe from which the test specimens are taken. If heat treatment is performed in continuous or batchtype furnaces controlled within a 50°F [30°C] range and equipped with recording pyrometers so that complete records of heat treatment are available, then one test from each heat in a continuous run only shall be required instead of one test from each heat in each heat-treatment load. 12.4 Impact Tests (Welded Pipe)—On welded pipe, additional impact tests of the same number as required in 12.2 or 12.3 shall be made to test the weld. 12.5 Specimens showing defects while being machined or prior to testing may be discarded and replacements shall be considered as original specimens. 12.6 Results obtained from these tests shall be reported to the purchaser or his representative. 13. Specimens for Impact Test 13.1 Notched bar impact specimens shall be of the simple beam, Charpy-type, in accordance with Test Methods E 23, Type A with a V notch. Standard specimens 10 by 10 mm in cross section shall be used unless the material to be tested is of insufficient thickness, in which case the largest obtainable subsize specimens shall be used. Charpy specimens of width along the notch larger than 0.394 in. [10 mm] or smaller than 0.099 in. [2.5 mm] are not provided for in this speci?cation. 13.2 Test specimens shall be obtained so that the longitudinal axis of the specimen is parallel to the longitudinal axis of the pipe while the axis of the notch shall be perpendicular to the surface. On wall thicknesses of 1 in. [25 mm] or less, the specimens shall be obtained with their axial plane located at the midpoint; on wall thicknesses over 1 in. [25 mm], the specimens shall be obtained with their axial plane located 1?2 in. [12.5 mm] from the outer surface. 13.3 When testing welds the specimen shall be, whenever diameter and thickness permit, transverse to the longitudinal
A 333/A 333M
TABLE 6 Impact Temperature Reduction
Specimen Width Along Notch or Actual Material Thickness in. 0.394 0.354 0.315 0.295 0.276 0.262 0.236 0.197 0.158 0.131 0.118 0.099
Temperature Reduction, Degrees ColderA °F 0 0 0 5 8 10 15 20 30 35 40 50 °C 0 0 0 3 4 5 8 11 17 19 22 28
mm 10 (standard size) 9 8 7.5 (3?4 std. size) 7 6.67 (2?3 std. size) 6 5 (1?2 std. size) 4 3.33 (1?3 std. size) 3 2.5 (1?4 std. size)
Straight line interpolation for intermediate values is permitted.
speci?ed in the purchase order.7 15.2 The hydrostatic test shall be in accordance with Speci?cation A 530/A 530M. 15.3 Nondestructive Electric Test: Nondestructive electric tests shall be in accordance with Practice E 213 or E 309. Unless speci?cally called out in the purchase order, the selection of the nondestructive electric test will be at the option of the manufacturer. The range of pipe sizes that may be examined by each method shall be subject to the limitations in the scope of the respective practices. 15.3.1 The following information is for the bene?t of the user of this speci?cation: 15.3.2 The reference standards de?ned in 15.3.3 through are convenient standards for calibration of nondestructive testing equipment. The dimensions of these standards should not be construed as the minimum size imperfection detectable by such equipment. 15.3.3 The ultrasonic testing (UT) can be performed to detect both longitudinally and circumferentially oriented defects. It should be recognized that different techniques should be employed to detect differently oriented imperfections. The examination may not detect short, deep, defects. 15.3.4 The eddy-current testing (ET) referenced in this speci?cation. (Practice E 309), has the capability of detecting signi?cant discontinuities, especially the short abrupt type. 15.3.5 A purchaser interested in ascertaining the nature (type, size, location, and orientation) of discontinuities that can be detected in the speci?c application of these examinations should discuss this with the manufacturer of the tubular product. 15.4 Time of Examination: 15.4.1 Nondestructive testing for speci?cation acceptance shall be performed after all mechanical processing, heat treatments, and straightening operations. This requirement does not preclude additional testing at earlier stages in the processing. 15.5 Surface Condition: 15.5.1 All surfaces shall be free of scale, dirt, grease, paint, or other foreign material that could interfere with interpretation
7 Society for Nondestructive Testing, 1711 Arlingate Plaza, PO Box 28518, Columbus, OH, 43228-0518.
of test results. The methods used for cleaning and preparing the surfaces for examination shall not be detrimental to the base metal or the surface ?nish. 15.5.2 Excessive surface roughness or deep scratches can produce signals that interfere with the test. 15.6 Extent of Examination: 15.6.1 The relative motion of the pipe and the transducer(s), coil(s), or sensor(s) shall be such that the entire pipe surface is scanned, except as in 15.6.2 The existence of end effects is recognized, and the extent of such effects shall be determined by the manufacturer, and, if requested, shall be reported to the purchaser. Other nondestructive tests may be applied to the end areas, subject to agreement between the purchaser and the manufacturer. 15.7 Operator Quali?cations: 15.7.1 The test unit operator shall be certi?ed in accordance with SNT-TC-1A, or an equivalent recognized and documented standard. 15.8 Test Conditions: 15.8.1 For eddy-current testing, the excitation coil frequency shall be chosen to ensure adequate penetration yet provide good signal-to-noise ratio. 15.8.2 The maximum eddy-current coil frequency used shall be as follows: On speci?ed walls up to 0.050 in.—100 KHz max On speci?ed walls up to 0.150 in.—50 KHz max On speci?ed above 0.150 in.—10 KHz max 15.8.3 Ultrasonic—For examination by the ultrasonic method, the minimum nominal transducer frequency shall be 2.00 MHz and the maximum nominal transducer size shall be 1.5 in. (1) If the equipment contains a reject notice ?lter setting, this shall remain off during calibration and testing unless linearity can be demonstrated at that setting. 15.9 Reference Standards: 15.9.1 Reference standards of convenient length shall be prepared from a length of pipe of the same grade, size (NPS, or outside diameter and schedule or wall thickness), surface ?nish and heat treatment condition as the pipe to be examined. 15.9.2 For Ultrasonic Testing, the reference ID and OD notches shall be any one of the three common notch shapes shown in Practice E 213, at the option of the manufacturer. The depth of each notch shall not exceed 121?2 % of the speci?ed nominal wall thickness of the pipe or 0.004 in., whichever is greater. The width of the notch shall not exceed twice the depth. Notches shall be placed on both the OD and ID surfaces. 15.9.3 For Eddy-Current Testing, the reference standard shall contain, at the option of the manufacturer, any one of the following discontinuities: (1) Drilled Hole—The reference standard shall contain three or more holes, equally spaced circumferentially around the pipe and longitudinally separated by a sufficient distance to allow distinct identi?cation of the signal from each hole. The holes shall be drilled radially and completely through the pipe wall, with care being taken to avoid distortion of the pipe while drilling. One hole shall be drilled in the weld, if visible. Alternately, the producer of welded pipe may choose to drill one hole in the weld and run the calibration standard through
A 333/A 333M
the test coils three times with the weld turned at 120° on each pass. The hole diameter shall vary with NPS as follows:
NPS Designator ? above 1?2 to 11?4 above 11?4 to 2 above 2 to 5 above 5
Hole Diameter 0.039 in. (1 mm) 0.055 in. (1.4 mm) 0.071 in. (1.8 mm) 0.067 in. (2.2 mm) 0.106 in. (2.7 mm)
(2) Transverse Tangential Notch—Using a round tool or ?le with a 1?4 in. (6.4 mm) diameter, a notch shall be ?led or milled tangential to the surface and transverse to the longitudinal axis of the pipe. Said notch shall have a depth not exceeding 121?2 % of the speci?ed nominal wall thickness of the pipe or 0.004 in. (0.102 mm), whichever is greater. (3) Longitudinal Notch—A notch 0.031 in. or less in width shall be machined in a radial plane parallel to the tube axis on the outside surface of the pipe, to have a depth not exceeding 121?2 % of the speci?ed wall thickness of the pipe or 0.004 in., whichever is greater. The length of the notch shall be compatible with the testing method. 15.9.4 More or smaller reference discontinuities, or both, may be used by agreement between the purchaser and the manufacturer. 15.10 Standardization Procedure: 15.10.1 The test apparatus shall be standardized at the beginning and end of each series of pipes of the same size (NPS or diameter and schedule or wall thickness). Grade and heat treatment condition, and at intervals not exceeding 4 h. More frequent standardization may be performed at the manufacturer’s option or may be required upon agreement between the purchaser and the manufacturer. 15.10.2 The test apparatus shall also be standardized after any change in test system settings, change of operator, equipment repair, or interruption due to power loss, process shutdown or when a problem is suspected. 15.10.3 The reference standard shall be passed through the test apparatus at the same speed and test system settings as the pipe to be tested. 15.10.4 The signal-to-noise ratio for the reference standard shall be 21?2 to 1 or greater. Extraneous signals caused by identi?able causes such a dings, scratches, dents, straightener marks, etc., shall not be considered noise. The rejection amplitude shall be adjusted to be at least 50 % of full scale of the readout display. 15.10.5 Upon any standardization, the rejection amplitude has decreased by 29 % (3 dB) of peak height from the last standardization, the pipe since the last calibration shall be rejected. The test system settings may be changed, or the transducer(s), coil(s) or sensor(s) adjusted, and the unit restandardized, but all pipe tested since the last acceptable standardization must be retested for acceptance. 15.11 Evaluation of Imperfections: 15.11.1 Pipes producing a signal equal to or greater than the lowest signal produced by the reference standard(s) shall be
identi?ed and separated from the acceptable pipes. The area producing the signal may be reexamined. 15.11.2 Such pipes shall be rejected if the test signal was produced by imperfections that cannot be identi?ed or was produced by cracks or crack-like imperfections. These pipes may be repaired per Sections 11 and 12. To be accepted, a repaired pipe must pass the same non-destructive test by which it was rejected, and it must meet the minimum wall thickness requirements of this speci?cation. 15.11.3 If the test signals were produced by visual imperfections such as in the following: 22.214.171.124 Scratches, 126.96.36.199 Surface roughness, 188.8.131.52 Dings, 184.108.40.206 Straightener marks, 220.127.116.11 Cutting chips, 18.104.22.168 Steel die stamps, 22.214.171.124 Stop marks, or 126.96.36.199 Pipe reducer ripple. The pipe may be accepted based on visual examination provided the imperfection is less than 0.004 in. (0.1 mm) or 121?2 % of the speci?ed wall thickness (whichever is greater). 15.11.4 Rejected pipe may be reconditioned and retested providing the wall thickness is not decreased to less than that required by this or the product speci?cation. The outside diameter at the point of grinding may be reduced by the amount so removed. To be accepted, retested pipe shall meet the test requirement. If the imperfection is explored to the extent that it can be identi?ed as non-rejectable, the pipe may be accepted without further test providing the imperfection does not encroach on the minimum wall thickness. 16. Product Marking 16.1 Except as modi?ed in 15.1.1, in addition to the marking prescribed in Speci?cation A 530/A 530M, the marking shall include whether hot ?nished, cold drawn, seamless or welded, the schedule number and the letters “LT” followed by the temperature at which the impact tests were made, except when a lower test temperature is required because of reduced specimen size, in which case, the higher impact test temperature applicable to a full-size specimen should be marked. 16.1.1 When the size of the ?nished pipe is insufficient to obtain subsize impact specimens, the marking shall not include the letters LT followed by an indicated test temperature unless Supplementary Requirement S1 is speci?ed. 16.1.2 When the pipe is furnished in the quenched and tempered condition, the marking shall include the letters “QT”, and the heat treatment condition shall be reported to the purchaser or his representative. 17. Keywords 17.1 low temperature service; seamless steel pipe; stainless steel pipe; steel pipe; temperature service applications; low
A 333/A 333M
SUPPLEMENTARY REQUIREMENTS The following supplementary requirement shall apply only when speci?ed by the purchaser in the contract or order. S1. Subsize Impact Specimens S1.1 When the size of the ?nished pipe is insufficient to permit obtaining subsize impact specimens, testing shall be amatter of agreement between the manufacturer and the purchaser.
(Nonmandatory Information) X1. DETERMINATION OF TEMPERATURE REDUCTIONS
X1.1 Under the circumstances stated in 14.1.2, the impact test temperatures speci?ed in Table 5 must be lowered. The following examples are offered to describe the application of the provisions of 14.1.2. X1.1.1 When subsize specimens are used (see 10.1) and the width along the notch of the subsize specimen in 80 % or greater of the actual wall thickness of the original material, the provisions of 14.1.2 do not apply. X188.8.131.52 For example, if the actual wall thickness of pipe was 0.200 in. [5.0 mm] and the width along the notch of the largest subsize specimen obtainable is 0.160 in. [4 mm] or greater, no reduction in test temperature is required. X1.1.2 When the width along the subsize specimen notch is less than 80 % of the actual wall thickness of the pipe, the
required reduction in test temperature is computed by taking the difference between the temperature reduction values shown in Table 6 for the actual pipe thickness and the specimen width used. X184.108.40.206 For example, if the pipe were 0.262 in. [6.67 mm] thick and the width along the Charpy specimen notch was 3.33 mm (1/3 standard size), the test temperature would have to be lowered by 25°F [14°C]. That is, the temperature reduction corresponding to the subsize specimen is 35°F [19°C]; the temperature reduction corresponding to the actual pipe thickness is 10°F [5°C]; the difference between these two values is the required reduction in test temperature.
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