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7月 8, 2019

Threaded Pipe Fittings

Threaded pipe fittings are widely used in piping system, it is similar to socket weld fittings. ASME B16.11 & BS3799 pipe fittings are in 4 inch or below.

Forged steel fittings are usually used for low cost and less demand. For example: domestic water, fire fighting pipeline and industrial cooling system.

What is ASME B16.11?

This Standard covers ratings, dimensions, tolerances, marking and material requirements for socket-welding and threaded forged fittings. These fittings are designated as Class 2000, 3000, and 6000 for threaded end fittings and Class 3000, 6000, and 9000 for socket-weld end fittings

How Many Types of Threaded Pipe Fittings

Threaded Pipe Fittings
Threaded Pipe Fittings

Threaded Elbow, Tee, Coupling, Cap, Plug, Bushing, Nipple and Union.

Screw Coupling

Full Coupling

Threaded Full Coupling
Threaded Full Coupling

Threaded full coupling is to joint two pipes or tubes with screw process.

Half Coupling

Threaded Half Coupling
Threaded Half Coupling

The length is half of full coupling. One end is thread, the other end is plain for welding.

Threaded Pipe Tee

BSP Equal Tee
BSP Equal Tee

Female screw tee is the most common pipe fitting that used to combine or divide fluid flow. It can connect pipes of different diameters or change the direction of a pipe run or both. There are two types that equal & unequal tee or straight & reducing tee.

Threaded Pipe Elbow

NPT Threaded Elbow
NPT Threaded Pipe Elbow

Threaded elbow is installed between two lengths of pipe (or tubing) to allow a change of direction, usually a 90° or 45°. And manufacturing by forging and ends are usually machined for female thread.

Screw (Threaded) Union

Threaded Union Fittings
Threaded Union Fittings

It consists of three parts: a nut, a female end and a male end. That is a type of very compact flange connector.

Threaded Plug

Threaded Plug
Plug

Plug fits inside the pipe segment or fitting. It has three types that square head plug, hex head plug, round head plug.

Bushing

Threaded Cap

Threaded Cap Picture & Drawing
Threaded Cap Picture & Drawing

It is sealing the pipe cap with thread. Same as plug.

3000LB Threaded Fittings Weight Chart

3000LB Threaded Pipe Fittings Weight Chart
3000LB Threaded Pipe Fittings Weight Chart

Material & Grades for Threaded Fittings

Carbon Steel Threaded Fittings

ASTM A105, A694 F52, F60, F65, F70, A350 LF2, LF3

Alloy Steel Forged Threaded Pipe Fittings

ASTM A182 F1, F5, F9, F11, F12, F22, F91

Stainless Steel Screw Pipe Fittings

ASTM A182 F304/304L/304H, F316/316L, F310, F317, F321, F309, F347, F904L

Super Duplex Steel Pipe Fittings

ASTM A182 F51, F53, F55, F56, F57, F60

Our Supply Range for Forged Steel Fittings

Size: 1/8”, 1/4”, 3/8”, 1/2”, 3/4”, 1”, 1 1/4”, 1 1/2”, 2”, 2 1/2”, 3”, 4”
Pressure: 3000LB, 6000LB, 9000LB
Thread: NPT, MPT, PT, BSPP, BSPT
Types: Socket Weld Fittings and Threaded Fittings

What is Tolerance for Threaded Fittings?

Threaded Pipe Fittings Tolerance Chart
Threaded Pipe Fittings Tolerance Chart
Knowledge