33 CFR §127.405
The operator must ensure that—
- (a)Equipment repairs are made so that—
- (1)The equipment continues to meet the applicable requirements in this subpart and in NFPA 59A (incorporated by reference, see § 127.003); and
- (2)Safety is not compromised; and
- (b)Welding is done in accordance with NFPA 51B and Section 10.4.3 of NFPA 59A (both incorporated by reference, see § 127.003).