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BSPP High Pressure Threaded Coupling

BSP Pipe Fittings Specification:
Type: Elbow /Tee /Cross /Coupling /Cap/Union /Nipple /Plug /Bushing
Standard: ASME B16.11, BS3799
Size: 1/8IN-4IN/DN6-DN10
Rating: 2000lbs,3000lbs,6000lbs
British Standard Pipe Parallel (BSPP)

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British Standard Pipe Parallel (BSPP)

A British Standard Pipe Parallel is the straight equivalent of a BSPT thread. BSPP connections require a bonded seal ring, which is sandwiched in between the shoulder of the male fitting and the face (opening) of the female fitting.

Threaded fittings are available in pressure ratings Class 2000, 3000, and 6000;

3000lb steel pipe fittings if common used in connection of piping.

Threaded Coupling or Half Coupling is a short piece with screw in NPT or BSP ends or one end, which is available in stainless steel, alloy steel and carbon steel. The size range is DN6-DN100. The common grade of Carbon Steel Threaded Pipe Coupling is ASTM A105/A105N

Forged threaded pipe fittings are named by its manufacturing forging process and produced according to ASME B16.11, MSS-SP-79\83\95\97 and BS3799 standards. It is a connector in between nominal bore pipes. Their material can be made of carbon steel A105 and stainless steel SS316 & 304. Threaded fittings are mainly used for small pipe diameters, generally for piping whose nominal diameter is NPS 2 or smaller. Threaded joints probably represent the oldest method of joining piping systems.

Steel pipe elbow can be divided into 3 types as buttweld, threaded, socket weld in accordance with connection. The material specification are ASTM A234, A182, A403, A105, A694, A350, A420 and A860.


Threaded Pipe Fittings Specification
Shape Elbow,Tee, Cross, Coupling, Cap, Swage Nipple, Bushing, Plug, Nipple, Union, Hex Nipple,Threadolet.
Size Range 1/8″ –  4″ / DN6 – DN100
Pressure Rating Class 2000lbs, 3000lbs, 6000lbs
Thread Type NPT, PT, BSPP, BSPT, PF
Standard ASME B16.11, BS3799, EN 10241, MSS SP-83, MSS SP-97
Carbon Steel ASTM A105 / A105N, ASTM A350 LF2/LF3, ASTM A694 F42 / 46 / 56 / 60 / 65, P235GH, P265GH, P280GH, P355GH
Alloy Steel ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 / 22
Stainless Steel ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317, 347, 904L,1.4404, 1.4437.
Duplex Stainless Steel ASTM A182 F51, F53, F44

Threaded Coupling Drawing and Dimension




Application of Threaded Pipe Fittings

Oil and Gas
Water Pipeline
Noncritical Applications
Power station
Fire Protection


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