49 CFR § 192.147 - Flanges and flange accessories.

---
identifier: "/us/cfr/t49/s192.147"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 192.147 - Flanges and flange accessories."
title_number: 49
title_name: "Transportation"
section_number: "192.147"
section_name: "Flanges and flange accessories."
chapter_name: "PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "D"
subchapter_name: "PIPELINE SAFETY"
part_number: "192"
part_name: "TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 185(w)(3), 49 U.S.C. 5103, 60101  and 49 CFR 1.97."
regulatory_source: "35 FR 13257, Aug. 19, 1970, unless otherwise noted."
cfr_part: "192"
---


# 192.147 Flanges and flange accessories.

(a) Each flange or flange accessory (other than cast iron) must meet the minimum requirements of ASME/ANSI B16.5 (incorporated by reference, see § 192.7), ANSI/MSS SP-44 (incorporation by reference, see § 192.7), or the equivalent.

(b) Each flange assembly must be able to withstand the maximum pressure at which the pipeline is to be operated and to maintain its physical and chemical properties at any temperature to which it is anticipated that it might be subjected in service.

(c) Each flange on a flanged joint in cast iron pipe must conform in dimensions, drilling, face and gasket design to ASME/ANSI B16.1 (incorporated by reference, *see* § 192.7)and be cast integrally with the pipe, valve, or fitting.

[35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192-62, 54 FR 5628, Feb. 6, 1989; 58 FR 14521, Mar. 18, 1993; Amdt. 192-119, 80 FR 181, Jan. 5, 2015; Amdt. 192-135, 89 FR 33281, Apr. 29, 2024]