46 CFR 57.06-1: -1 Production test plate requirements.

(a) Production test plates must be provided for Class I, Class I-L, Class II, and Class II-L pressure vessels are specified in this section.

(b) Main power boilers must meet the test plate requirements for Class I pressure vessels.

(c) Test plates are not required for heating boilers or Class III pressure vessels. Test plates are not required for main power boilers or pressure vessels constructed of P1 material as listed in QW/QB 422 of Section IX of the ASME BPVC (incorporated by reference; see § 57.02-1) whose welded joints are fully radiographed as required by part 52 or 54 of this subchapter as applicable except when toughness tests are required in accordance with § 57.06-5. When toughness tests are required, all prescribed production tests must be performed.