---
kind: "section"
citation: "46 C.F.R. § 52.15-5"
title: "46"
number: "52.15-5"
heading: "Tube connections (modifies PWT-9 and PWT-11)."
url: "https://uscodex.org/cfr/46/52.15-5"
---

# §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](/cfr/46/52.01-1.md)) 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](/cfr/46/56.95-10.md) of this subchapter.

## Notes

### Amendments

[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]

### Authority

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.

### Source

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.

### Amendments

[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]