[Code of Federal Regulations] [Title 49, Volume 3] [Revised as of October1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR192.125] [Page 39] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 192--TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS--Table of Contents Subpart C--Pipe Design Sec. 192.125 Design of copper pipe. (a) Copper pipe used in mains must have a minimum wall thickness of 0.065 inches (1.65 millimeters) and must be hard drawn. (b) Copper pipe used in service lines must have wall thickness not less than that indicated in the following table: ------------------------------------------------------------------------ Wall thickness inch (millimeter) Standard size inch Nominal O.D. inch --------------------------------- (millimeter) (millimeter) Nominal Tolerance ------------------------------------------------------------------------ \1/2\ (13) .625 (16) .040 (1.06) .0035 (.0889) \5/8\ (16) .750 (19) .042 (1.07) .0035 (.0889) \3/4\ (19) .875 (22) .045 (1.14) .004 (.102) 1 (25) 1.125 (29) .050 (1.27) .004 (.102) 1\1/4\ (32) 1.375 (35) .055 (1.40) .0045 (.1143) 1\1/2\ (38) 1.625 (41) .060 (1.52) .0045 (.1143) ------------------------------------------------------------------------ (c) Copper pipe used in mains and service lines may not be used at pressures in excess of 100 p.s.i. (689 kPa) gage. (d) Copper pipe that does not have an internal corrosion resistant lining may not be used to carry gas that has an average hydrogen sulfide content of more than 0.3 grains/100 ft\3\ (6.9/m\3\) under standard conditions. Standard conditions refers to 60 deg.F and 14.7 psia (15.6 deg.C and one atmosphere) of gas. [35 FR 13257, Aug. 19, 1970, as amended by Amdt. 192-62, 54 FR 5628, Feb. 6, 1989; Amdt. 192-85, 63 FR 37502, July 13, 1998]