Where the working pressure is less than 100 pounds, all pipe used in systems for transferring and venting of flammable liquids shall be of the standard full weight, ANSI Schedule ten wrought iron, steel, stainless steel, brass type pipe, Type K copper tube or copper pipe. All pipe shall be connected with standard malleable fittings or welded. Copper tubing shall be connected with flare joints or sweat fittings employing solder having a melting point of 1,000 degrees Fahrenheit or more. Where the working pressure is in the excess of 100 pounds per square inch, extra heavy wrought steel pipe (ASTM Schedule 80) and fittings shall be used. All aboveground piping shall be rigidly supported. Swing joints shall be made with butt or close nipples. Cast iron fittings shall not be permitted. Underwriters' Laboratories, Inc. listed expansion joints or flexible underground pipe connectors not exceeding 24 inches in length shall be permitted. No flexible underground pipe connector shall be connected to any impact check valve or within five feet of any remote pumping dispenser.
(Prior code § 129.1-36; Amend Coun. J. 2-7-96, p. 15463)