[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: 46CFR58.16-17] [Page 261-262] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 58_MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS--Table of Contents Subpart 58.16_Liquefied Petroleum Gases for Cooking and Heating Sec. 58.16-17 Piping and fittings. (a) The piping between the cylinders and the appliances shall be seamless annealed copper tubing or such other seamless tubing as may be approved by the Commandant. (b) All high pressure tubing between the cylinders and the regulators shall have a minimum wall thickness of 0.049 inch. All low- pressure tubing between the regulator and appliances shall have [[Page 262]] a minimum wall thickness of 0.032 inch. (c) Tubing connecting fittings shall be of the flare type; or connections may be soldered or brazed with material having a melting point in excess of 1,000 [deg]F.