49 CFR § 178.337-11 - Emergency discharge control.
---
identifier: "/us/cfr/t49/s178.337-11"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 178.337-11 - Emergency discharge control."
title_number: 49
title_name: "Transportation"
section_number: "178.337-11"
section_name: "Emergency discharge control."
chapter_name: "PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "HAZARDOUS MATERIALS REGULATIONS"
part_number: "178"
part_name: "SPECIFICATIONS FOR PACKAGINGS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97."
cfr_part: "178"
---
# 178.337-11 Emergency discharge control.
(a) *Emergency discharge control equipment.* Emergency discharge control equipment must be installed in a liquid discharge line as specified by product and service in § 173.315(n) of this subchapter. The performance and certification requirements for emergency discharge control equipment are specified in § 173.315(n) of this subchapter and are not a part of the cargo tank motor vehicle certification made under this specification.
(b) *Engine fuel lines.* On a truck-mounted cargo tank, emergency discharge control equipment is not required on an engine fuel line of not more than
3/4 NPT equipped with a valve having an integral excess flow valve or excess flow feature.
[64 FR 28050, May 24, 1999]