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Zizi supplies high quality A105 threaded cap in NPT and BSP thread, their dimensions are conform to ASME B16.11.
Threaded cap is often used at under 4” pipeline to stop the flow. Threaded plug is a pipe fitting which has the same function with threaded caps. Carbon steel threaded cap is cost effective and widely used, the most popular is A105 carbon steel cap.
As a manufacturer of steel pipe cap, we purchase top class row material form China leading steel mills, take advance of up-to-date techniques to produce pipe fittings by our skilled workers. To ensure the high quality, we take strict in factory inspection and supply third party inspection for any products. No matter the quantity is large or small, we will offer the same high quality threaded pipe cap.
Based on the different thread type, we divided threaded cap into NPT cap and BSP cap
NPT Cap
NPT refers to national pipe threaded which is conform to American standard ASME B1.20.1. NPT cap has tapered thread with 60 degree thread angle, its seal requires 2 turns of sealant.
BSP Cap
BSP threaded cap are British standard threaded fittings and can be further divided into BSPP cap and BSPT cap.
BSPP Cap is parallel threaded fittings and uses bonded seal rings to do the sealing. This type threaded fittings are most popular in the UK, Asia, South Africa and Europe.
BSPT cap is similar to NPT thread fittings that has tapered thread, but it thread angle is 55 degree which is different with NPT thread. Even through they are tapered thread, NPT threaded fittings cannot be connected with BSPT threaded fittings.
Size | 1/8" to 4" / DN6 to DN100 |
Pressure Rating | Class 3000, 6000 |
Standard | ASME B16.11 and BS3799 |
Surface | Anti-rust Oil or Galvanized |
Thread Type | NPT, BSPP, BSPT |
Stainless Steel | ASTM A182 F304/304L, F304H, F316/316L, F310, F317, F321 |
Caron Steel | ASTM A105, A350 LF2, LF3, A694 F52, F60, F65, F70 |
Alloy Steel | ASTM A182 F1, F5, F9, F11, F12, F22, F91 |
Duplex Steel | ASTM A182 F51, F53, F55, S 31803, S 32205, S 32550, S 32750, S 32760 |
In Factory Inspection
Check the surface, marking, dimension and thread of A105 threaded cap.
Third Party Inspection