[Code of Federal Regulations]
[Title 46, Volume 2]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR54.25-7]

[Page 163]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 54_PRESSURE VESSELS--Table of Contents
 
 Subpart 54.25_Construction With Carbon, Alloy, and Heat Treated Steels
 
Sec. 54.25-7  Requirement for postweld heat treatment (modifies UCS-56).

    (a) Postweld heat treatment is required for all carbon and low alloy 
steel Class I, I-L, and II-L vessels regardless of thickness. (Refer to 
Table 54.01-5(b) for applicable requirements.)
    (b) Cargo tanks which are fabricated of carbon or low alloy steel as 
Class II pressure vessels, designed for pressures exceeding 100 pounds 
per square inch gage and used in the storage or transportation of 
liquefied compressed gases shall be postweld heat treated regardless of 
thickness.

[CGFR 69-127, 35 FR 9977, June 17, 1970]