46 CFR § 52.15-5 - Tube connections (modifies PWT-9 and PWT-11).
---
identifier: "/us/cfr/t46/s52.15-5"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 52.15-5 - Tube connections (modifies PWT-9 and PWT-11)."
title_number: 46
title_name: "Shipping"
section_number: "52.15-5"
section_name: "Tube connections (modifies PWT-9 and PWT-11)."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "F"
subchapter_name: "MARINE ENGINEERING"
part_number: "52"
part_name: "POWER BOILERS"
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. 3306, 3307, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.3."
regulatory_source: "CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by USCG-2020-0634, 89 FR 50095, June 12, 2024, unless otherwise noted."
cfr_part: "52"
---
# 52.15-5 Tube connections (modifies PWT-9 and PWT-11).
(a) Tubes, pipe, and nipples must be attached to sheets, heads, headers, and fittings as indicated in PWT-11 of Section I of the ASME BPVC (incorporated by reference; see § 52.01-1) except as noted otherwise in this section.
(b) (Replaces PWT-9.2 and PWT-11.3.) Threaded boiler tubes are not permitted as described by PWT-9.2 and PWT-11.3 of Section I of the ASME BPVC.
(c) In welded wall construction employing stub and welded wall panels that are field welded, 10 percent of the field welds must be checked using any acceptable nondestructive test method.
(d) Nondestructive testing of the butt-welded joints must meet the requirements of § 56.95-10 of this subchapter.
[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGFR 69-127, 35 FR 9976, June 17, 1970; CGD 81-79, 50 FR 9434, Mar. 8, 1985; USCG-2003-16630, 73 FR 65161, Oct. 31, 2008]