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Alloy Steel Buttweld Fittings

We are specialized in manufacturing Alloy Steel Fittings and supply Alloy Steel Buttweld Fittings,If you are interested in any of our Alloy Steel Buttweld Fittings.or would like to discuss a custom order, please feel free to contact us.

Alloy Steel Buttweld Fittings Heat Treatment

Heat Treatment Procedures – fittings, after forming at an elevated temperature below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air. Heat treatment temperature specified are metal (part) temperatures. Heat- treatment fittings shall be treated according to paragraph 7 in specification A960/A960M.

WPB, WPC, and WPR Fittings

Hot-formed WPB, WPC, and WPR fittings upon which the final forming operation is completed at a temperature above 1150 °F [620° C ] and below 1800 °F [980 °C] need not be heat treatment provided they are cooled in still air. 7.2.2 Hot-formed or forged WPB, WPC, and WPR fitting finished at temperature in excess of 1800 °F [980 °C] shall subsequently be annealed, normalised, or normalized and tempered. Hot-forged fittings NPS 4 or smaller need not be heat treated.

WPB, WPC, and WPR fittings over NPS 12, produced by locally heating a portion of the fitting stock to any temperature for forming, shall be subsequently annealed, normalized, or normalized and tempered. fittings such as elbows tees, header tees, reducers and lap joint stub ends with a carbon content less than 0.26%, NPS 12 and under, shall not require heat treatment after forming a locally heated portion of the fitting.

Fittings of Grades ASTM A234 WP1, WP11 Class 1, WP11 Class 2, WP11 Class 3, WP12 Class 1, WP12 Class 2, WP22 Class 1, WP22 Class 3, WP5, and WP9 shall be finished in the full-annealed, isothermal – annealed, or normalized and tempered condition. If normalized and tempered, the tempering temperature for WP11 Class 1, WP11 Class 2, WP11 Class3, WP12 Class 1, and WP12 Class 2 shall not be less than 1150 °F [620 °C] for Grades WP5, WP9, WP22 Class 1, and WP22 Class 3 the tempering temperature shall not be less than 1250 °F [675 °C]

A234 Wp11 Alloy Steel Buttweld Fittings Specifications

MaterialSize (mm)SCH/ ClassThicknessSpecificationManufacturing

Alloy Steel

Buttweld Fittings

15NB to 600NB

200NB to 1800NB

SCH40 to XXS

SCH10, 20, 30, 40, 80

3.91 to 60mm

6.35 to 60mm

A234 WP

A234 WP



Alloy Steel ANSI B16.9 / B16.28 Pipe Fittings Specifications 

Dimensions : ANSI/ASME B16.9, B16.28, MSS-SP-43

Designation : ASTM A234, ASME SA234, WP1 / WP5 / WP9 / WP11 / WP22 / WP91

Range : 1/8” NB – 48” NB

Type : Seamless / Welded / Fabricated

Schedules : 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS

Grade SpecificationAlloy Steel: ASTM/ASME A234/ SA234
ASTM A234 Wp11 Fittings SizeSeamless:from 1/2" to 24"
Welded:from 24" to 96"(or as customer requirements)
ASTM A234 Wp11 Fittings Degree22.5 deg, 30deg,45 deg,90 deg,180 deg, 1.0D, 1.5D, 2.0D, 2.5D, 3D,4D,5D,6D,7D-40D.
ASTM A234 Wp11 Fittings ThicknessSCH10, SCH20, SCH30, STD SCH40,
SCH60, XS, SCH80., SCH100,
SCH120, SCH140, SCH160, XXS
StandardASME B16.9, ASME B16.25, MSS SP-75 
DIN2605 JISB2311 JISB2312 JISB2313,
Alloy Steel MaterialAlloy Steel 
ASTM A234 WPB, A234WPC, A420 WPL6, etc
Stainless steel
ASTM A403 WP304, 304L, 316, 316L, 321,etc
Alloy steel
ASTM A234 WP12, WP11, WP22, WP5, WP9, WP91, etc
ASTM A234 Wp11 Fittings TypeSeamless / Welded / Fabricated
ASTM A234 Wp11 Fittings Bending RadiusR=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
ASTM A234 Wp11 Fittings Range

½" NB to 48" NB in Sch 10s, 40s, 80s, 160s, XXS.
From 1/2 to 30 (Seamless Pipe Fittings), 

Form16 to 100 (Seam Pipe Fittings)

DimensionsANSI/ASME B16.9, B16.28, MSS-SP-43.
Applicable Standards1-ASME B 16.9 for large Bore 
2-ASME B 16.11 for small Bore (socket welded)
3-ASME B 16.25 for butt weld ends
4-ASME B 16.28 for small radius elbow
Seamless/ Welded 100% Radiography Teste

ASTM A182/A182MForged or rolled alloy steel pipe flanges, forged fittings and valves and parts for high temperature service. Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
ASTM A403/A403MWrought austenitic stainless steel piping fittings.
ASTM A815/A815MWrought ferritic, ferritic/austenitic and martensitic stainless steel piping fittings.
AS 2129Flanges for pipes, valves and fittings
ANSI/ASME B1.20.1Pipe threads, general purpose (inch).
ANSI B16.5Steel pipe flanges and flanged fittings.
ANSI B16.9Factory-made wrought steel butt-welding fittings.
ANSI B16.11Forged steel fittings socket-welding and threaded.
Socket Welding and Threaded Forged Fittings
ANSI B16.25Butt-welding ends.
MSS SP43Wrought stainless steel butt-welding fittings.
Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications
ISO 4144Stainless steel fittings threaded to ISO 7-1.
MSS SP-95Swage(d) Nipples and Bull Plugs
BS3799Specification for Steel pipe fittings, screwed and Socket-welding for the petroleum industry
ANSI – B 16.9



Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings

API 590-605
ASME B16.9
Factory-Made Wrought Buttwelding Fittings
ASME B16.25Buttwelding Ends
ASME B16.28Wrought Steel Buttwelding Short Radius Elbows and Returns

We are higher quality Manufacturer of Alloy Steel Buttweld Pipe Fittings, alloy steel butt welding pipe fittings, A403 Gr WP304, A403 Gr WP 304L, A403 Gr WP316, A403 Gr WP316L, A403 Gr WP316Ti, A403 Gr WP321, A403 Gr WP321H, A403 Gr WP347, A403 Gr WP347H, A403 Gr WP317, A403 Gr WP 317L,  A420 Fittings, Carbon Steel Buttweld Fittings, A105 Flanges, ASTM A350 Carbon Steel Flanges, A694 Carbon Steel Flanges, Alloy Steel Pipe Fittings, ASTM A234 Fittings, A234 Alloy Steel Pipe Fittings, Alloy Steel Buttweld Fittings, 


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