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21 Ιουν 2024 · In this article, we’ll explain the straight pipe thread and NPS thread, NPS and NPT differences, and focus on NPSM/NPSL thread dimensions charts. What Is Straight Pipe Thread? Straight pipe thread, also known as parallel thread or non-tapered thread, is a type of thread used to connect pipes or tubes in a piping system.
NPSC is a lesser-known pipe thread standard series defined in ASTM B1.20. These Internal Straight (parallel) Pipe Threads are used to manufacture pressure-tight fittings when assembled with an NPT external taper thread. This series applies to internal threads only.
NPSC Pipe Thread ANSI B 1.20.1-1983 (R1992) The parallel pipe thread N ational P ipe S traight C oupling is combined with the tapered fitting threa N ational P ipe T aper using a sealant. The flank angle is 60°, the profile was originated by William Sellers. Advertising:
The following table chart defines Straight Pipe Threads for Mechanical Joints, NPSM and NPSL ANSI/ASME B1.20.1, American Pipe Threads Standard. Straight pipe threads are designated NPSC = National Pipe Straight Coupling. Also generically referred to as "IPS Threads" or "Iron Straight Threads".
The following table chart defines Straight Pipe Threads for Mechanical Joints, NPSM and NPSL ANSI/ASME B1.20.1, American Pipe Threads Standard. Straight pipe threads are designated NPSC = National Pipe Straight Coupling. Also generically referred to as "IPS Threads" or "Iron Straight Threads".
The NPSL thread series is designed to produce a pipe thread with the largest diameter possible to cut on a standard pipe. The internal and external thread dimensions are designed to have a “loose fit”, and a locknut with an O-ring is required to create a seal.
Standard Pipe Tap: 3/8-18, NPSC, 4 Flutes, High Speed Steel, Bright/Uncoated. 1-1/16" Thread Length, 2-9/16" OAL, Series 1687
