---
kind: "section"
citation: "46 C.F.R. § 154.310"
title: "46"
number: "154.310"
heading: "Cargo piping systems."
url: "https://uscodex.org/cfr/46/154.310"
---

# §154.310. Cargo piping systems.


Cargo liquid or vapor piping must:

- (a) Be separated from other piping systems, except where an interconnection to inert gas or purge piping is required by [§ 154.901(a)](/cfr/46/154.901.md?p=a);
- (b) Not enter or pass through any accommodation, service, or control space;
- (c) Except as allowed under [§ 154.703](/cfr/46/154.703.md), not enter or pass through a machinery space other than a cargo pump or compressor room;
- (d) **Be in the cargo area except—**
  - (1) As allowed under [§ 154.703](/cfr/46/154.703.md);
  - (2) Bow and stern loading piping; and
  - (3) **Emergency jettisoning piping.**
- (e) **Be above the weather deck except—**
  - (1) As allowed under [§ 154.703](/cfr/46/154.703.md);
  - (2) Pipes in a trunk traversing void spaces above a cargo containment system; and
  - (3) Pipes for draining, venting, or purging interbarrier and hold spaces;
- (f) **Connect into the cargo containment system above the weather deck except—**
  - (1) Pipes in a trunk traversing void spaces above a cargo containment system; and
  - (2) **Pipes for draining, venting, or purging interbarrier and hold spaces.**
- (g) Be inboard of the transverse cargo tank location required by [§ 154.235](/cfr/46/154.235.md), except for athwartship shore connection manifolds not subject to internal pressure at sea.

## Notes

### Authority

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.