TITLE 46 - SHIPPING

CHAPTER I - COAST GUARD, DEPARTMENT OF HOMELAND SECURITY

SUBCHAPTER L - OFFSHORE SUPPLY VESSELS

PART 128 - MARINE ENGINEERING: EQUIPMENT AND SYSTEMS

subpart d - DESIGN REQUIREMENTS FOR SPECIFIC SYSTEMS

128.450 - Liquid - mud systems.

  (a) Liquid-mud piping systems may use resiliently seated valves of Category A to comply with 56.2015 and 56.5060 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.