Radiographic and ultrasonic examination of welded joints must be as described in PW-11 of section I of the ASME Boiler and Pressure Vessel Code (incorporated by reference; see 46 CFR 52.01-1), 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, must be nondestructively examined as required by Sec. 56.95-10 of this subchapter even though they may be exempted by the limits on size specified in table PW-11 and PW-41.1 of section I of the ASME Boiler and Pressure Vessel Code. [USCG-2003-16630, 73 FR 65162, Oct. 31, 2008]