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Butt Welding Pipe Fitting Manufacturers in China

ASME B16.9 is the standard for factory-made wrought butt-welding pipe fittings in sizes 1/2" through 48". Generally speaking, butt-welding pipe fittings are fabricated pieces of pipe that are used either to make changes of direction(elbow&return), close the pipeline end(end caps), branch from the main pipe(tee), or make a reduction in line size(reducer). They can be made from seamless pipes, welded pipes or plates.


The standard for butt welding pipe fittings as below:

ASME(ANSI) Standards 

B16.9    Factory-Made Wrought Steel Butt-Welding Fittings

B16.28   Wrought Steel Butt-Welding Short Radius Elbows and Returns

B16.25   Butt Welding Ends

B36.10   Welded and Seamless Wrought Steel Pipe

B36.19   Stainless Steel Pipe 


ASTM Standards 

A105    Standard Specification for Carbon Steel Forgings for Piping Applications

A234    Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service

A403    Wrought Austenitic Stainless Steel Piping Fittings

A420    Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low Temperature Service

A815    Wrought Ferric, Ferric/Austenitic, and Martensitic Stainless Steel Piping Fittings

MSS Standards

SP-43    Wrought Stainless Steel Butt-Welding Fittings

SP-75    High Test Wrought Butt-Welding Fittings

SP-79    Socket Welding Reducer Inserts

SP-87    Factory-Made Butt-Welding Fittings for Class I Unclear Piping Applications

JIS/KS Standards

JIS B2311/KS B1522    Steel Butt-Welding Pipe Fittings for Ordinary Use

JIS B2312/KS B1541    Steel Butt-Welding Pipe Fittings

JIS B2313/KS B1543    Steel Plate Butt-Welding Pipe Fittings

JIS B2220    Steel Welding Pipe Flanges

DIN Standards

2605-1    Steel Butt-Welding Pipe Fittings; Elbows and Bends with Reduced Pressure Factor

2609        Steel Butt-Welding Pipe Fittings; Technical Delivery Conditions 

2615-1    Steel Butt-Welding Pipe Fittings; Tees with Reduced Pressure Factor 

2615-2    Steel Butt-Welding Pipe Fittings; Tees for Use at Full Service Factor

2616-1    Steel Butt-Welding Pipe Fittings; Eccentric Reducers with Reduced Pressure Factor

2616-2    Steel Butt-Welding Pipe Fittings; Reducers for Use at Full Service Pressure Factor

2617        Steel Butt-Welding Pipe Fittings; Caps

BS Standards

BS1965   Steel Butt-Welding Pipe Fittings

BS4504   Circular Flanges for Pipes, Valves and Fittings

EN Standards

10253-1   Butt-Welding Pipe Fittings; Wrought Carbon Steel for General Use and Without Specific Inspection Requirements


Material Selection of Butt Welding Pipe Fittings

EATHU provides a wide selection of butt weld pipe fitting in both ferrous and non-ferrous materials. Basically speaking, there is a wide selection of various materials for butt-welding pipe fittings.


1) ASTM A234 Grade. WPB, WPC, WP1, WP12 CL1, WP12 CL2, WP11 CL1, WP11 CL2,WP11 CL3, WP22 CL1, WP22 CL3, WP5 CL1, WP5 CL3, WPR, WP91, WP911(pipe fittings of carbon steel & alloy steel for moderate and high temperature service)


2) ASTM A860 Grade. WPHY 42, WPHY 46, WPHY 52, WPHY 60, WPHY 65, WPHY 70 (butt weld pipe fittings of high strength ferrictic steel, matching with API 5L pipelines)


3) ASTM A403 Grade. WP304, WP304L, WP316, WP316L, WP317, WP317L, WP347,WP310S, WPS31254, WP321, WPS31725, WPS31726, WPS33228,WPS34565, WP347H, WP348(butt weld pipe fittings of austenitic stainless steel)


4) ASTM B366 Gr. N02200(Ni), N04400(Ni-Cu, Monel), N06600(Ni-Cr-Fe, Inconel 600), N08020(Cr-Ni-Fe-Mo-Cu-Cb, Alloy 20), N08825(Ni-Fe-Cr-Mo-Cu, Incoloy 825), N08031(Ni-Fe-Cr-Mo-Cu-Low C, Alloy 31), N06625(Ni-Cr-Mo-Cb,Inconel 625), N02201(Ni-Low Carbon), N08800(Ni-Fe-Cr, Incoloy 800),N08810(Ni-Fe-Cr, Incoloy 810), N10276(Low C-Ni-Mo-Cr, Hastelloy C276),N06022(Low C-Ni-Mo-Cr, Hastelloy C22), N08904(Ni-Fe-Cr-Mo-Cu, 904L)(butt weld pipe fittings of nickel alloy and super stainless steel for corrosion service)


5) Aluminium Alloy: EN AW-1050 / 1060, EN AW-5083, EN AW-6060 / 6061 / 6063,EN AW-6082, EN AW-5754(butt weld pipe fittings made from aluminium or aluminium alloy).


6) ASTM B363 Titanium Gr.1, Gr. 2, Gr. 3, Gr. 4, Gr. 5, Gr. 7, Gr. 9, Gr. 12(butt weld pipe fittings made from titanium or titanium alloy).


For price list, tolerance, weight, material and welding bevels of butt welding pipe fittings please check files from PRICE LIST AND TECH


Butt welding pipe fittings standard: 

ASME B16.49-2007 Factory-Made,Wrought Steel, Buttwelding Induction Bends for Transportation and 

ASME-B16.9-2007 Factory-Made Wrought Butt Welding Fitting

DIN2617-1991 Steel butt-welding pipe fittings

JIS G3452 SGP 1997  Steel Butt-welding pipe fittings for ordinary use

Weight for butt welding pipe fitting

Tolerances for ASME DIN JIS MSS Butt Welding Pipe Fittings

Wall Thickness Schedules (ASME B36.10 B36.19)

Eathu have stock for 2"-8" 90 elbow LR STD and reducer STD, can give you the soonest delivery time!

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