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Threads commonly used in Piping

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Thread Standards

Most piping threads are produced to national or industry group standards describing threads form - threads angle, pitch and diameter. Common standards are

TPI/Pitch

In general pitch refers to threads per inch (TPI) for fractional screw threads and pipe threads. For metric screw threads pitch refers to the distance between threads.

Piping Threads

Common piping thread standards in the United States are

Other common piping thread standards

More about standards applied for piping threads .

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Related Topics

Dimensions of Pipes and Tubes

Pipe, tube and fittings sizes and dimensions. Inside and outside diameters, weights and more.

Threads

Thread data - metric, unified, ACME and others.

Related Documents

ANSI B1.20.1 - NPS - American National Standard Straight Pipe Threads

NPS pressure tight straight pipe threads with lubricant or sealer.

ANSI B1.20.1 - NPT - American National Standard Taper Pipe Threads

NPT and NPTF pipe threads - dimensions according ANSI/ASME B1.20.1/3.

ASME B31 Pressure Piping - Overview

A survey of one of the most important pressure pipe codes - ASME B31, earlier known as ANSI B31.

British Standard Brass Threads

British Brass Thread is an imperial unit based screw thread.

British Standard Cycle Threads

British Standard Cycle is a British Imperial screw thread standard.

BS 21 - Pressure Tight Pipe Thread Joints

BSPT - British Standard Pipe Taper threads & BSP or BSPF - British Standard Pipe Parallel (Straight) threads.

EN 10226 - Pipe Threads where pressure tight joints are made on the threads - Dimensions

Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external threads and parallel internal threads.

ISO - Pipe, Tube and Fittings Standards and Specifications

International Organization for Standardization - ISO - pipe, tube and fittings standards and specifications.

ISO 228 - Pipe Threads where Pressure Tight Joints are not made on the Threads

Requirements for thread form, dimensions, tolerances and designation for fastening pipe threads, thread sizes.

ISO 2841 - Spark Plugs Metric Threads

Metric threads spark plugs according ISO 28741.

ISO 7 - Pipe Threads where Pressure-tight Joints are made on the Threads

Pressure-tight joints made on the pipe threads.

ISO 724 - Metric Threads

Dimensions of metric threads according ISO 724.

Metric Bolts - Minimum Ultimate Tensile and Proof Loads

Minimum ultimate tensile and proof loads for metric bolts with coarse or fine threads.

NPT Threads - Taps and Drill Sizes

NPT - Briggs Standard Pipe threads - Taps and Drill Sizes.

Pipes - Fractional Equivalents

Fractional vs. decimal inches.

Standards Applied for Piping Threads

Applied threaded standards used for piping connections.

Whitworth Pipe Threads

BSPP (G) - British Standard Pipe Parallel and BSPT (R/Rp) – British Standard Tapered Pipe for pipes and tapered threads - G/R/Rp.

Withworth Threads - Taps and Drill Sizes

Taps and drill sizes used for Whitworth - ISO 7 and ISO 228 threads.

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