Steel pipe.
Municipal Code of Chicago § 18-28-1107.4.1
in effect18-28-1107.4.1 Steel pipe.
Steel pipe up to 1 1/2-inches (38.1 mm) industry pipe standard (IPS) shall be ASTM A53-1978 Grade B. Steel Pipe 2-inches (50.8 mm) (IPS) and larger shall be either ASTM A53-1978 Grade B seamless or ASTM A106-1978 Grade B seamless. ASTM Schedule 40 or heavier steel pipe shall be used where fabricated and assembled by the fusion-welded process. If fabricated and assembled by the threading process, ASTM Schedule 80 steel pipe shall be used. Threaded and flanged fittings shall be cast steel.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2688936Fetched: 10/24/2026
