PIPE THREAD SIZES - MAKING SENSE OF PIPE THREADS

By A Mystery Man Writer

PIPE THREAD SIZES - MAKING SENSE OF PIPE THREADS The most common global pipe thread forms are: NPT American Standard Pipe Taper Thread NPSC American Standard Straight Coupling Pipe Thread NPTR American Standard Taper Railing Pipe Thread NPSM American Standard Straight Mechanical Pipe Thread NPSL American Standard Straight Locknut Pipe Thread NPTF American Standard Pipe Thread Tapered (Dryseal) BSPP British Standard Pipe Thread Parallel BSPT British Standard Pipe Thread Tapered Plastic injection molded thread forms are manufactured to ANSI B2.1 and SAE J476 standards. Pipe Thread Sizes Pipe thread sizes are based on an inside diameter (ID) or flow size. For example, “1/2–14 NPT” identifies a pipe thread with a nominal inside diameter of 1/2 inch and 14 threads to the inch, made according to the NPT standard. If “LH” is added, the pipe has a left hand thread. The
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