Malleable Iron 291 Plain Plug BSPT Thread

Size: 1/4”-6”
Material: BS EN 1562,EN-GJMB-350-10,KTH350-10
Dimension: BS EN 10242
Thread: ISO 7-1,BS 21,BSPT
Pressure Rating: PN16/PN25
Surface Treatment:Hot-dip Galvanized,Electro Galvanized,Black
Certificate: UL Listed / FM Approved / NSF 61
Application: Fire Protection,Waterworks,HVAC,Plumbing,GAS,Irrigation,or other piping systems

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Product Description

Products Details

Malleable Iron pipe fittings 291 Plain Plug. Plug has two type 290 beaded plain and 291 plain plug. According to the Surface treatment ,hot-dip Galvanized plain plug,electro Galvanized plug and black plug.According to thread Standard ,plain plug with BSP male thread, plain plug with NPT male thread. According to the material ,Malleable iton plug and steel plug,steel plug price is cheaper than Malleable cast iron plug.

Product Drawing


Size L B S PCS/ Size L B S PCS/
mm mm mm CTN. mm mm mm CTN.
1/4” 15.5 10 6 2400 1   1/2” 31 21 22 200
3/8” 17 10 7 2200 2” 36 25 26 120
1/2” 22.5 13 10 1400 2   1/2” 40.5 26.5 30 72
3/4” 24 14 12 800 3” 45.5 29.5 34 64
1” 27 16.5 15 500 4” 57 38 44 36
1 1/4” 30 20 18 300 6”


Cast iorn Plain Plug made of Malleable cast iron are used for closing the pipe. Also called end cap. A part of the pipe fittings are used to seal the pipe fittings, including gasket fittings, head fittings, flange blind fittings, pipe plugging fittings and welded plug fittings

Thread plug is a type of plug.
Plug: Just plug the unwanted mouth in the pipeline to play a closing role. Same as blinds, heads and caps.

Thread are used to plug holes by welding.
The plug is divided into four-square plug, hexagonal plug, round plug, and the implementation standard is ANSI B16.11, GB/T14383, BS 3799.

Plugs, also known as pipe caps, caps, pipe caps, and stuffed heads, are mounted on the external thread of the pipe end to cover the pipe fittings that plug the pipe. It is used to close the pipeline, the function is the same as the pipe plug, and it can be directly rotated on the pipe, without the need for other pipe fittings. Plugs include convex plugs, conical shells, reducers, flat covers and shrinkage ports. Thread plug is used at the end of the pipeline, to prevent the leakage of the pipeline, play the role of sealing, is a commonly used pipe fittings in the installation of plumbing systems, the nominal pressure is 1-1.6Mpa and 2.5Mpa pipeline systems.

Application and Case

Malleable Iron 291 Plain Plug BSPT Thread are used in fire protection system, water system, HVAC system, plumbing, gas system, irrigation system, etc.American Standard Malleable Iron Fittings are used in many projects , such as Beijing Airport, Shanghai World Trade Center, Canton Tower and other famous landmark projects.