Threading

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We provide high-precision threading for various steel pipes, including OCTG, complying with API, BSP and NPT standards. Using CNC threading machines and closed-loop detection, we ensure excellent thread accuracy, sealing performance and wear resistance. Our customized service matches subsequent processes, ensuring tight connection of pipeline systems under harsh working conditions.

Common pipe thread types:

1.NPT or NPS (national pipe tapered or straight): Most common in North America.
2.MIP or FIP (male or female iron pipe): Same thread dimensions as NPT.
3.BSP(T) or BSP(S) (British standard pipe tapered or straight): Most common in Europe.
4.Compression: A unique threaded fitting that does not mate with other thread types.
5.UNS (National Unified Special): Some compatible with compression fittings.

NPT Thread Chart

NPT Nominal Size	Actual OD	Hand Tight Turns	Wrench Turns
1/8	0.405″	4.5	2.5
1/4	0.54″	4	3
3/8	0.675″	4.5	3
1/2	0.84″	4.5	3
3/4	1.05″	4.5	3
1	1.32″	4.5	3.25
1 1/4	1.66″	4.5	3.25

BSP Thread Chart

BSP Nominal Size	Major Diameter (OD)	Minor Diameter (ID)
1/8	0.38″	0.34
1/4	0.52″	0.45
3/8	0.65″	0.59
1/2	0.83″	0.73
3/4	1.04″	0.95
1	1.30″	1.19
1 1/4	1.65″	1.53

What are the parts of a pipe thread?

1.The thread dimension refers to the major diameter or outside measurement.
2.The pitch is the distance from the peak of one crest to the opposite of another.
3.The thread angle is the difference between the threads or the valley between the peaks.

We encourage innovative thinking and continuously seek improvement and breakthroughs to meet customer needs and lead industry development.

With the development of the Internet of Things and automation technology, smart valves can achieve remote monitoring and automation control through sensors and control systems, improving the efficiency and reliability of energy systems.

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+86 0731 8867 2086

E-mail

sales@shinestar-steel.com

Address

No.9 Xiangfu Rd, Yuhua District, Changsha, China.