• Steel Flanges

    A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system, provides easy access for cleaning, inspection or modification. read more

  • Pipe Fittings

    The ends of all buttweld fittings are bevelled.The shape of the bevel depending upon the actual wall thickness.This bevelled ends are needed to be able to make a "Butt weld". read more

  • Steel Pipes

    Pipe is a hollow tube with round cross section for the conveyance of products. The products include fluids, gas, pellets, powders and more. read more

What is A234 WPB Steel pipe fitting?

A234 WPB steel pipe fittings mean the pipe fitting which material is ASTM A234 WPB , they are used for the pressure piping systems of moderate and high temperature services.  ASTM A234 is the standard of pipe fittings material , it indicates the materials properties of different kinds of carbon steel and alloy steel, WPB is one of the steel grade in this standard  . W means weldable, P means pressure, B is grade b ,refer to the minimum yield strength , like the astm A106  A53, Gr.B or API 5L Gr.B.   A234 WPB is the most common carbon steel pipe fittings material . (ASTM A234 A234M Standard Specification)  

A234 WPB pipe fittings are butt welding ends , commonly used to be welded with the steel pipes of A106, A53, GR.B material, or API 5L GR.B material. 

Chemical Composition (%) of ASTM A234 WPB

Grade C Mn P S Si  
WPB 0.3 0.29-1.06 0.05 0.058 0.1min  
Grade Cr Mo Ni Cu V Nb
WPB 0.4 0.15 0.4 0.4 0.08 0.02

Mechanical properties of ASTM A234 WPB

Item Tensile Strength (KSI) Yield Strength (KSI)
WPB 60 35


Type of the ASTM A234 WPB steel pipe fittings :  

The regular products of A234 WPB pipe fittings are elbows, tees, reducers, caps, cross .   There are seamless and ERW A234 WPB pipe fittings,  the seamless A234 WPB pipe fittings means the fittings are made from the  seamless steel pipes,  ERW means the fittings are made from ERW steel pipes .  Welded A234 WPB pipe fittings mean the large sizes fittings which are pieces welded from steel plates.

Manufacturing process of  ASTM A234 WPB steel pipe fittings:  

The process of A234 WPB pipe fittings manufacturing is called “wrought” which means it could be casted or forged .  Usually  the ASTM A234 WPB elbows , tees, reducers  are made from steel pipes , the caps are made from plates.   But the large sizes pipe fittings are commonly manufactured in pieces and welded together .    

(Manufacturing process of the steel pipe fittings)

(Manufacturing video of the steel pipe fittings)

Hebei haihao Group has more than 20 years experiences in ASTM A234 WPB steel pipe fittings manufacturing , we can supply all the range of the fittings including the elbows ,tees, reducers, and caps of high quality , soon delivery. 


Latest Products

08 2016 04
07 2016 04
19 2016 03
15 2016 03

Our Markets

haihao has been a professional supplier of pipes,fittings and flanges, serving the world industry piping since 1982.
oil and gas industry

as a leading manufacturer,stockist and supplier, our knowledgeable and experienced technical team can understand well what you need . help you find the best solution for your regular and specific requirement.
contact us


Serving the world flowing! Aiming to be the best in the field! Improving level of “Made in China”!”

Tom , Haihao Group

Our References