รายละเอียดเอกสาร

This specification establishes requirements for dimensions and gaging of taper pipe threads used on threaded plastic pipe and fittings. Threads meeting this specification shall only be used on those plastic materials deemed suitable by the manufacturer. Specialty threads or threads not requiring a leak-tight joint are not covered in this specification. NOTE 1: The terms “wrench makeup” and “wrench tight” are standard terminology for tightness and do not imply using a pipe wrench or other tools which would damage plastic pipe and fittings. The terms “hand-tight” and “hand-tight engagement” refer only to thread gaging (not pipe and fitting connections) and is the definition of the L1 gage length. Thread Designations—The type of pipe threads included in this specification are designated by specifying in sequence the nominal pipe size, number of threads per inch, and the thread series symbols as follows in accordance with ANSI/ASME B 1.20.1: 3/8-18 NPT. For left-hand threads add LH to the end of the designation, otherwise right-hand threads will be understood. For example: 3/8-18 NPT-LH.

...