46 C.F.R. § 59.10-15 Rivets and staybolts.
Title 46 - Shipping
(a) It is not permitted to reinforce or build up by welding the heads of rivets or staybolts that have deteriorated. Such rivets or staybolts shall be replaced. The seal welding of rivet heads to secure tightness is prohibited. (b) Where leaks develop around staybolts which are otherwise in good condition, the nuts may be replaced with a beveled collar formed around the end of the stay by means of welding. In such cases, the depth of collar measured on the stay and the width measured on the plate, shall be equal to one-half the diameter of the staybolt.
Title 46: Shipping
PART 59—REPAIRS TO BOILERS, PRESSURE VESSELS AND APPURTENANCES
Subpart 59.10—Welding Repairs to Boilers and Pressure Vessels in Service
§ 59.10-15 Rivets and staybolts.
