Active Standard ASTM B474 | Developed by Subcommittee: B02.07
Book of Standards Volume: 02.04
Historical (view previous versions of standard)
This specification covers electric fusion welded pipe suitable for high-temperature or corrosive service. The pipes are designated into five classes namely Class 1, Class 2, Class 3, Class 4 and Class 5, according to how they are to be welded. The joints shall be full penetration double-welded or single-welded butt joints employing fusion welding processes. The furnished pipe shall undergo heat treatment and a chemical analysis shall be employed for both plate and weld. Each pipe shall be subjected to transverse tension test, transverse guided weld bend test and hydrostatic pressure test.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers electric fusion welded pipe suitable for high-temperature or corrosive service as listed in Table 1. (Although no restrictions are placed on the sizes of pipe that may be furnished under this specification, commercial practice is commonly limited to sizes not less than 8 in. (203 mm) nominal diameter.)
1.2 Five classes of pipe are covered as follows:
1.2.1 Class 1—Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.
1.2.2 Class 2—Pipe shall be double welded by processes employing filler metal in all passes. No radiography is required.
1.2.3 Class 3—Pipe shall be single welded by processes employing filler metal in all passes and shall be completely radiographed.
1.2.4 Class 4—Same as Class 3 except that the weld pass exposed to the inside pipe surface may be made without the addition of filler metal.
1.2.5 Class 5—Pipe shall be double welded by processes employing filler metal in all passes and shall be spot radiographed.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
TABLE 1 Recommended Heat Treatment
|Alloy||UNS Designation||PWHTA, B|
Deg. F. (Deg. C)
|200 (Ni)||N02200||1650-1700 (900 to 928)||Rapid Air/water|
|201 (Low C)||N02201||1650-1700 (900 to 928)||Rapid Air/water|
|400 (Ni-Cu)||N04400||1650-1700 (900 to 928)||Rapid Air/water|
|X (Ni-Cr-Mo-Fe)||N06002||2150 (1177)C||Rapid Air/water|
|C22D (Low C-Ni-Mo-Cr)||N06022||2050-(1120)C||Rapid Air/water|
|G30D (Ni-Cr-Fe-Mo-Cu)||N06030||2150 (1177)C||Rapid Air/water|
|C2000D(Ni-Cr-Mo-Cu)||N06200||2075-2125 (1135-1163)B||Rapid Air/water|
|230D (Ni-Cr-W-Mo)||N06230||2150-2250 (1177-1232)B||Rapid Air/water|
|600 (Ni-Cr-Fe)||N06600||1800-1850 (983 to 1010)||Rapid Air/water|
|601 (Ni-Cr-Fe-Al)||N06601||1600-1650 (874 to 900)E||Rapid Air/water|
|625 (Ni-Cr-Mo-Cb) Grade 1||N06625||1600 (871)C||Rapid Air/water|
|625 (Ni-Cr-Mo-Cb) Grade 2||N06625||2000 (1093)C||Rapid Air/water|
|G3D (Ni-Cr-Fe-Mo-Cu)||N06985||2100-2150 (1147 to 1177)B||Rapid Air/water|
|Alloy 20 (Cr-Ni-Fe-Mo-Cu-Cb)||N08020||1700-1850 (927 to 1010)||Rapid Air/water|
|...||N08024||1925-1975 (1052 to 1079)||Rapid Air/water|
|...||N08026||2050-2200 (1121 to 1204)||Rapid Air/water|
|825 (Ni-Fe-Cr-Mo-Cu)||N08825||1700-1800 (930 to 980)E||Rapid Air/water|
|C276 (Low C-Ni-Mo-Cr)||N10276||2050 (1121)C||Rapid Air/water|
|B2 (Ni-Mo)||N10665||1950 (1065)C||Rapid Air/water|
|B3D (Ni-Mo)||N10675||1950 (1065)C||Rapid Air/water|
A Recommended temperatures—Different temperatures may be selected by either the purchaser or the manufacturer.
B Set temperatures, ±25°F (±14°C).
C Minimum set temperature.
D Registered Trademark of Haynes International.
E Heat treatment is highly dependent on intended service temperature — consult material manufacturer for specific heat treatments for end use temperature.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
B127 Specification for Nickel-Copper Alloy (UNS N04400) Plate, Sheet, and Strip
B162 Specification for Nickel Plate, Sheet, and Strip
B168 Specification for Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, N06045, and N06696), Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617), and Nickel-Iron-Chromium-Tungsten Alloy (UNS N06674) Plate, Sheet, and Strip
B333 Specification for Nickel-Molybdenum Alloy Plate, Sheet, and Strip
B424 Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825, UNS N08221, and UNS N06845) Plate, Sheet, and Strip
B435 Specification for UNS N06002, UNS N06230, UNS N12160, and UNS R30556 Plate, Sheet, and Strip
B443 Specification for Nickel-Chromium-Molybdenum-Columbium Alloy(UNS N06625) and Nickel-Chromium-Molybdenum-SiliconAlloy (UNS N06219) Plate, Sheet, and Strip
B463 Specification for UNS N08020 Alloy Plate, Sheet, and Strip
B536 Specification for Nickel-Iron-Chromium-Silicon Alloys (UNS N08330 and N08332) Plate, Sheet, and Strip
B575 Specification for Low-Carbon Nickel-Chromium-Molybdenum, Low-Carbon Nickel-Chromium-Molybdenum-Copper, Low-Carbon Nickel-Chromium-Molybdenum-Tantalum, and Low-Carbon Nickel-Chromium-Molybdenum-Tungsten Alloy Plate, Sheet, and Strip
B582 Specification for Nickel-Chromium-Iron-Molybdenum-Copper Alloy Plate, Sheet, and Strip
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
B899 Terminology Relating to Non-ferrous Metals and Alloys
E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys
American Society of Mechanical Engineers StandardASME Boiler and Pressure Vessel Code, Section IX and Section VIII, Div. 1
ICS Number Code 77.150.40 (Nickel and chromium products)