[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: 46CFR54.20-2] [Page 162] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 54_PRESSURE VESSELS--Table of Contents Subpart 54.20_Fabrication by Welding Sec. 54.20-2 Fabrication for hazardous materials (replaces UW-2(a)). (a) Pressure vessels containing hazardous materials as defined in Sec. 150.115 of this chapter must be of the class and construction required by subchapter D, I, O, or, when not specified, of a class determined by the Commandant. (b) Class III pressure vessels must not be used for the storage or stowage of hazardous materials unless there is specific authorization in subchapters D, I, or O. [CGD 77-147, 47 FR 21810, May 20, 1982]