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ASME B16.11 Forged Steel Threaded Pipe Fittings Specification

Views: 130     Author: Site Editor     Publish Time: 2022-12-29      Origin: Site

When we talk about “ANSI/ASME B16.11 forged fittings”, usually it refers to two kinds of pipe fittings that socket weld and threaded. Forged pipe fittings are made from solid blocks of steel, and machined to the final shapes as above standard. Shanghai Zhucheng manufacturer in China offers Class 2000/3000/6000 Threaded Fittings in accordance to standard of ASME / ANSI B16.11, these forged pipe fittings are available in various shapes. 

ASME B16.11 Forged Steel Threaded pipe Fittings

Types of Threaded Pipe Fittings

Generally speaking, ASME/ANSI B16.11 threaded connections are commonly used for small size piping which is smaller than 2 inches. In the majority situation, threaded fittings are used in the plumbing industry. Among them, there are various kinds of thread types like NPT, BSPP, BSPT, PF, PT, MPT. Even though threaded fittings are mostly used for small bore piping connection, in actual order , their size could be up to 4” (NPS 4) sizes and can be customized.

Ranges from usage and functions,ASME/ANSI B16.11 threaded pipe fittings includes ElbowTee, CrossCoupling, Cap, Swage Nipple, Bushing, Plug, Nipple, Union, Hex Nipple,Threadolet.


What is ASME B16.11 Standard Scope

ASME B16.11 including pressure-temperature ratings, dimensions, tolerances, marking and material requirements is the standard for forged fittings.This article shows the relevant content in the following table.


Specification of ASME/ANSI B16.11 Threaded Fittings

Shape Elbow,Tee, Cross, Coupling, Cap, Swage Nipple, Bushing, Plug, Swage Nipple, Union, Hex Nipple,Threadolet.
Size Range 1/8" –  4" / DN6 - DN100
Pressure Rating Class 2000, Class 3000, Class 6000, 2000LBS, 3000LBS, 6000LBS
Thread Type NPT, PT, BSPP, BSPT, PF


Material Grades in Carbon Steel, Alloy Steel and Stainless steel

Carbon Steel Threaded Fittings

Grade: ASTM A105 / A105N, ASTM A350 LF2/LF3, ASTM A694 F42 / 46 / 56 / 60 / 65, P235GH, P265GH, P280GH, P355GH


Alloy Steel ANSI B 16.11 Threaded Fittings

Grade: ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 / 22


Stainless Steel Threaded Fittings

Grade: ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317, 347, 904L, 1.4404, 1.4437


Duplex Stainless Steel

Grade: ASTM A182 F51, F53, F44


Advantages of ASME B16.11 Threaded Fitting Connections

(1) Quick installation.

(2) Suitable for low-pressure applications, leakage integrity is good.

(3) Installation is easy, Special installation skill is not required.

(4) Less force is required for joining.

(5) Parts can be detached.

(6) Economic and cheaper.


Disadvantages of ANSI B16.11 Threaded Connections

(1) Not suitable for high temperature-pressure applications.

(2) Threads may suffer from corrosion in a corrosive environment.

(3) Temperature changes may cause leakage problems.

(4) Fatigue damage can occur for cyclic services.

(5) Strength is less as compared to welding.


Shanghai Zhucheng Pipe Fittings Manufacturing Co Ltd. is a large manufacturer and supplier of pipe fittings in different grades, sizes and types.

We have a large stock ASME/ANSI B16.11 of threaded fittingsthat are available in pressure ratings of class 2000, 3000 and 6000. We are constantly adding to our diverse product range in order to better serve our valued customers.


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