¹ For austenitic materials where two sets of stresses appear, use the lower values.

² Type F (Furnace welded, using open hearth, basic oxygen, or electric furnace only) limited to Class II applications with a maximum service temperature of 450 °F. Type E (ERW grade) limited to maximum service temperature of 650 °F, or less.

³ Electric resistance welded pipe or tubing of this specification may be used to a maximum design pressure of 350 psig.

⁴ Refer to limitations on use of welded grades given in § 56.60-2(b).

⁵ Use generally considered for Classes I-L and II-L applications. For Class I-L service only, the seamless grade is permitted. For other service refer to footnote 4 and to § 56.50-105.

⁶ Furnace lap or furnace butt grades only. Limited to Class II applications only where the maximum service temperature is 450 °F, or less.

⁷ Limited to Class II applications only where maximum service temperature is 300 °F or less for straight seam, and 200 °F or less for spiral seam.

⁸ Limited to Class II applications where the maximum service temperature is 300 °F or less for straight seam and 200 °F or less for spiral seam.

⁹ For Class I applications only the Class I Grade of the specification may be used.

¹⁰ When used in piping systems, a certificate must be furnished by the manufacturer certifying the mechanical properties at room temperature. Without this certification, use is limited to applications within heat exchangers.

¹¹ Hydrostatic testing of these fittings is not required but all fittings must be capable of withstanding a hydrostatic test of 1.5 times the design pressure.

¹² Other acceptable iron castings are in UCI-23 and UCD-23 of Section VIII of the ASME BPVC. (See also §§ 56.60-10 and 56.60-15.) Acceptable castings of materials other than cast iron may be found in Sections I or VIII of the ASME BPVC.

¹³ Acceptable when complying with ANSI standards. Ductile iron is acceptable for temperatures not exceeding 650 °F. For pressure temperature limitations refer to UCD-3 of Section VIII of the ASME BPVC. Other grades of cast iron are acceptable for temperatures not exceeding 450 °F. For pressure temperature limitations refer to UCI-3 of Section VIII of the ASME BPVC.

¹⁴ For limitations in use refer to §§ 56.10-5(c) and 56.60-20.

¹⁵ Copper pipe must not be used for hot oil systems except for short flexible connections at burners. Copper pipe must be annealed before installation in Class I piping systems. See also §§ 56.10-5(c) and 56.60-20.

¹⁶ The stress values must be taken from UNF23 of Section VIII of the ASME BPVC for B75 annealed and light drawn temper as appropriate.

¹⁷ B68 is acceptable if provided with a mill hydrostatic or eddy current test.

¹⁸ Limited to pipe fittings and valves. See § 56.60-15(d) for additional information.

Note 1 to table 1 to § 56.60-1: Table 1 to § 56.60-1 replaces Table 126.1 in ASME B31.1 and sets forth specifications of pipes, tubing, and fittings intended for use in piping-systems. The first column lists acceptable standards from ASTM (all incorporated by reference; see § 56.01-2); the second lists those from ASME (all incorporated by reference; see § 56.01-2). The Coast Guard will consider use of alternative pipes, tubing, and fittings when it receives certification of their mechanical properties.

Note 2 to table 1 to § 56.60-1: When using 104.1.2 in ASME B31.1 to compute wall thickness, the stress shown here must be applied as though taken from the stress tables. An additional factor of 0.8 may be required by § 56.07-10(c) and (e).

¹ All standards incorporated by reference; see § 56.01-2.

² In addition, for bronze valves, adequacy of body shell thickness must be satisfactory to the Marine Safety Center. Refer to § 56.60-10 of this part for cast-iron valves.

³ Mill or manufacturer's certification is not required, except where a needed portion of the required marking is deleted because of size or is absent because of age of existing stocks.

⁴ Because this standard offers the option of several materials, some of which are not generally acceptable to the Coast Guard, compliance with the standard does not necessarily indicate compliance with these rules. The marking on the component or the manufacturer or mill certificate must indicate the specification or grade of the materials as necessary to fully identify the materials. The materials must comply with the requirements in this subchapter governing the particular application.