Description:

18.000 inches nominal pipe size designation, plain first end style, identical second end relationship with first end, straight seamed construction.

Properties:

A straight, one piece metallic pipe in excess of 12 inches (304 mm) in length. It may have external or internal threads or may be unthreaded. For pipe having external threads 12 inches (304 mm) or less in length see nipple,pipe. For pipe having internal threads 12 inches (304 mm) or less in lenght see coupling,pipe.