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:#

Standard size inch (millimeter) Nominal O.D. inch (millimeter) Wall thickness inch (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) 11⁄4 (32) 1.375 (35).055 (1.40).0045 (.1143) 11⁄2 (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 °F and 14.7 psia (15.6 °C and one atmosphere) of gas.#