46 CFR § 154.548 - Cargo piping: Flow capacity.
---
identifier: "/us/cfr/t46/s154.548"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 154.548 - Cargo piping: Flow capacity."
title_number: 46
title_name: "Shipping"
section_number: "154.548"
section_name: "Cargo piping: Flow capacity."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "O"
subchapter_name: "CERTAIN BULK DANGEROUS CARGOES"
part_number: "154"
part_name: "SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted."
cfr_part: "154"
---
# 154.548 Cargo piping: Flow capacity.
Piping with an excess flow valve must have a vapor or liquid flow capacity that is greater than the rated closing flow under § 154.546.