Carbon steel pipe fittings are used in many industrial piping systems because they provide strength, weldability and cost efficiency. Two material specifications buyers often see are ASTM A234 WPB and ASTM A105. Although both are carbon steel materials, they are used for different types of piping components.
What is ASTM A234 WPB?
ASTM A234 WPB is commonly specified for wrought carbon steel butt weld fittings such as elbows, tees, reducers and caps. These fittings are frequently used in pressure piping systems for oil and gas, chemical processing, power plants, water systems and general industrial service.
What is ASTM A105?
ASTM A105 is commonly used for forged carbon steel piping components, especially flanges, forged fittings and valves. If a project requires carbon steel flanges, A105 is one of the most common material specifications.
ASTM A234 WPB vs ASTM A105
- A234 WPB: commonly used for wrought butt weld fittings.
- A105: commonly used for forged flanges and forged fittings.
- Applications: both can be used in pressure piping, but component type determines the correct material specification.
- Standards: A234 WPB fittings often follow ASME B16.9, while A105 flanges often follow ASME B16.5.
When to choose carbon steel fittings
Carbon steel is a strong choice when corrosion conditions are moderate and the system requires good mechanical strength at a competitive cost. It is common in process piping, boiler systems, oil and gas facilities, fire protection systems and many utility lines.
Important ordering details
When ordering carbon steel fittings, include the fitting type, size, schedule or pressure class, material grade, standard, end connection and quantity. If the fittings require heat treatment, testing, coating, marking or third-party inspection, include those details in the inquiry.
Related products
For carbon steel components, review our pipe elbows, pipe tees, pipe reducers and pipe flanges.
FAQ
Is ASTM A234 WPB used for flanges?
No. ASTM A234 WPB is mainly used for wrought fittings. Carbon steel flanges are commonly specified as ASTM A105.
Are carbon steel fittings suitable for corrosive fluids?
They can be used in many systems, but corrosive fluids may require coatings, corrosion allowance or stainless steel materials.
Need carbon steel pipe fittings? Contact PipingFitting.com with your specification and quantity for a project quote.