46 C.F.R. Subpart 52.05—Requirements for Boilers Fabricated by Welding
Title 46 - Shipping
(a) Boilers and component parts, including piping, that are fabricated by welding shall be as indicated in PW–1 through PW–54 of the ASME Code except as noted otherwise in this subpart. (a) Vessels and vessel parts shall be preheated and postweld heat treated in accordance with PW–38 and PW–39 of the ASME Code (reproduces PW–10). This includes boiler parts made of pipe material even though they may be nondestructively examined under §52.05–20. Radiographic and ultrasonic examination of welded joints shall be as described in PW–11 of the ASME Code except that parts of boilers fabricated of pipe material, such as drums, shells, downcomers. risers, cross pipes, headers and tubes containing only circumferentially welded butt joints, shall be nondestructively examined as required by §56.95–10 of this subchapter even though they may be exempted by the size limitations specified in PW–11.1.2 and PW–41.1 of the ASME Code. [CGD 81–79, 50 FR 9434, Mar. 8, 1985] (a) The location and minimum size of attachment welds for nozzles and other connections shall be as required by PW–16 of the ASME Code except as noted otherwise in this section. (b) When nozzles or couplings are attached to boilers, as shown in Figure PW–16 (a) and (c) of the ASME Code and are welded from one side only, backing strips shall be used unless it can be determined visually or by acceptable nondestructive test methods that complete penetration has been obtained. (c) When attachments as shown in Figure PW–16 (y) and (z) of the ASME Code are employed they shall be limited to 2-inch pipe size for pressure exceeding 150 pounds per square inch. (a) Circumferential welded joints of pipes, tubes and headers shall be as required by PW–41 of the ASME Code except as noted otherwise in this section. (b) (Modifies PW–41.1) Circumferential welded joints in pipes, tubes, and headers of pipe material must be nondestructively examined as required by §56.95–10 of this subchapter and PW–41 of the ASME Code. (c) (Modifies PW–41.5) Butt welded connections shall be provided whenever radiography is required by §56.95–10 of this subchapter for the piping system in which the connection is to be made. When radiography is not required, welded socket or sleeve type joints meeting the requirements of PW–41.5 of the ASME Code may be provided. [CGFR 68–82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81–79, 50 FR 9434, Mar. 8, 1985]
Title 46: Shipping
PART 52—POWER BOILERS
Subpart 52.05—Requirements for Boilers Fabricated by Welding
§ 52.05-1 General (modifies PW–1 through PW–54).
§ 52.05-15 Heat treatment (modifiesPW–10).
§ 52.05-20 Radiographic and ultrasonic examination (modifies PW–11 and PW–41.1).
§ 52.05-30 Minimum requirements for attachment welds (modifies PW–16).
§ 52.05-45 Circumferential joints in pipes, tubes and headers (modifies PW–41).
