46 C.F.R. § 128.450 Liquid-mud systems.
Title 46 - Shipping
(a) Liquid-mud piping systems may use resiliently seated valves of Category A to comply with §§56.20–15 and 56.50–60 of this chapter. (b) Tanks for oil-based liquid mud must be fitted with tank vents equipped with flame screens. Vents must not discharge to the interior of the vessel.
Title 46: Shipping
PART 128—MARINE ENGINEERING: EQUIPMENT AND SYSTEMS
Subpart D—Design Requirements for Specific Systems
§ 128.450 Liquid-mud systems.
