View all text of Subpart 56.60 [§ 56.60-1 - § 56.60-25]
§ 56.60-2 - Limitations on materials.
The following restrictions apply to the use of welded pipe and tubing specifications when utilized in piping systems, and not when utilized in heat exchanger, boiler, pressure vessel, or similar components:
(a) Longitudinal joint. Wherever possible, the longitudinal joint of a welded pipe must not be pierced with holes for branch connections or other purposes.
(b) Class II. Use unlimited except as restricted by maximum temperature or pressure specified in table 1 to § 56.60-1 or by the requirements contained in § 56.10-5(b).
(c) Class I. (1) For those specifications in which a filler metal is used, the following applies to the material as furnished prior to any fabrication:
(i) For use in service above 800 °F full welding procedure qualifications by the Coast Guard are required. See part 57 of this subchapter.
(ii) Ultrasonic examination as required by item S-6 in ASTM A376 (incorporated by reference; see § 56.01-2) must be certified as having been met in all applications except where 100 percent radiography is a requirement of the particular material specification.
(2) For those specifications in which no filler material is used in the welding process, the ultrasonic examination as required by item S-6 in ASTM A376 must be certified as having been met for service above 800 °F.
Table 1 to § 56.60-2—Adopted Specifications Not Listed in the ASME BPVC
| ASTM specifications | Supplementary requirements | Bar stock: | A276 (Grades 304-A, 304L-A, 310-A, 316-A, 316L-A, 321-A, 347-A, and 348-A) | Allowable stresses must be the same as those listed in UCS23 of Section VIII of the ASME BPVC for the corresponding SA-182 material. | A575 and A576 (Grades 1010-1030) | Allowable stresses must be the same as in UCS23 of Section VIII of the ASME BPVC for ASME SA-675. Physical testing must be performed the same as for ASME SA-675, except that the bend test is not required. | Bar stock: | B16 2 (soft and half hard tempers) | An ammonia vapor test in accordance with ASTM B858 must be performed on a representative model of each finished product design. | B21 (alloys A, B, and C) | Allowable stresses must be the same as those listed in UNF23 of Section VIII of the ASME BPVC for SB-171, naval brass. | B124: | Alloy 377 2 | An ammonia vapor test in accordance with ASTM B858 must be performed on a prototype for each product design. Tension tests must be performed to determine tensile strength, yield strength, and elongation. Minimum values must be those listed in Table 3 of ASTM B283 | Alloy 464 | Physical testing, including mercurous nitrate test, must be performed as for material manufactured to ASTM B21. Allowable stresses must be the same as those listed in UNF23 of Section VIII of the ASME BPVC for SB-171, naval brass. | Alloy 655 | Physical testing must be performed as for material manufactured to ASTM B96. Allowable stresses must be the same as those listed in UNF23 of Section VIII of the ASME BPVC for SB-96 and must be limited to a maximum allowable temperature of 212 °F. | Alloy 642 | An ammonia vapor test, in accordance with ASTM B858 must be performed on a prototype of each product design. Physical testing must be performed as for material manufactured to ASTM B171, alloy D. Allowable stresses must be the same as those listed in UNF23 of Section VIII of the ASME BPVC for SB-171, aluminum bronze D. | Alloy 630 | An ammonia vapor test, in accordance with ASTM B858 must be performed on a prototype of each product design. Physical testing must be performed as for material manufactured to ASTM B171, alloy E. Allowable stresses must be the same as those listed in UNF23 of Section VIII of the ASME BPVC for SB-171, aluminum bronze, alloy E. | Alloy 485 | Physical testing, including mercurous nitrate test, must be performed as for material manufactured to ASTM B21. Allowable stresses must be the same as those listed in UNF23 of Section VIII of the ASME BPVC for SB-171, naval brass. | Forgings: | B283 2 (forging brass) | An ammonia vapor test, in accordance with ASTM B858, must be performed on a prototype for each product design. Tension tests must be performed to determine tensile strength, yield strength, and elongation. Minimum values must be those listed in Table 3 of ASTM B283. | Castings: | B26 | Tension tests must be performed to determine tensile strength, yield strength, and elongation. Minimum values must be those listed in Table X-2 of ASTM B85. | B85 | Tension tests must be performed to determine tensile strength, yield strength, and elongation. Minimum values must be those listed in Table X-2 of ASTM B85. |
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1 For limitations in use refer to § 56.60-5.
2 Limited to air and hydraulic service with a maximum design temperature of 150 °F. The material must not be used for saltwater service or other fluids that may cause dezincification or stress corrosion cracking.
3 Those alloys with a maximum copper content of 0.6 percent or less are acceptable under this specification. Cast aluminum must not be welded or brazed.