---
kind: "section"
citation: "49 C.F.R. § 178.255-1"
title: "49"
number: "178.255-1"
heading: "General requirements."
url: "https://uscodex.org/cfr/49/178.255-1"
---

# §178.255-1. General requirements.

- (a) Tanks must be of fusion welded construction, cylindrical in shape with seamless heads concave to the pressure. Tank shells may be of seamless construction.
- (b) Tanks must be designed, constructed, certified, and stamped in accordance with Section VIII of the ASME Code (IBR, see [§ 171.7](/cfr/49/171.7.md) of this subchapter).
- (c) Tanks including all permanent attachments must be postweld heat treated as a unit.
- (d) Requirements concerning types of valves, retesting, and qualification of portable tanks contained in §§ [173.32](/cfr/49/173.32.md) and [173.315](/cfr/49/173.315.md) of this chapter must be observed.

## Notes

### Amendments

[29 FR 18972, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 178-7, 34 FR 18250, Nov. 14, 1969; 68 FR 75750, Dec. 31, 2003]

### Source

Source: 29 FR 18972, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.

### Authority

Authority: 49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97.

### Amendments

[29 FR 18972, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 178-7, 34 FR 18250, Nov. 14, 1969; 68 FR 75750, Dec. 31, 2003]