(a) Material subject to stress due to pressure must conform to specifications as indicated in paragraphs PG-5 through PG-13 of section I of the ASME Boiler and Pressure Vessel Code (incorporated by reference; see 46 CFR 52.01-1) except as noted otherwise in this section.

(b) Material not fully identified with an ASME Boiler and Pressure Vessel Code-approved specification may be accepted as meeting Coast Guard requirements providing it satisfies the conditions indicated in paragraph PG-10 of section I of the ASME Boiler and Pressure Vessel Code.

(c) (Modifies PG-5.) When the maximum allowable working pressure (See PG-21) exceeds 15 pounds per square inch, cross pipes connecting the steam and water drums of water tube boilers, headers, cross boxes, and all pressure parts of the boiler proper, shall be made of a wrought or cast steel listed in tables 1A and 1B of section II of the ASME Boiler and Pressure Vessel Code (incorporated by reference; see 46 CFR 52.01-1).

(d) (Modifies PG-8.2.) The use of cast iron is prohibited for mountings, fittings, valves, or cocks attached directly to boilers operating at pressures exceeding 15 pounds per square inch.

[USCG-2003-16630, 73 FR 65161, Oct. 31, 2008]