ASTM A234 Gr WPB
ASTM A234 Gr WPB Pipe Fittings
Emirerri Steel is a trusted manufacturer and supplier of ASTM A234 Gr WPB Pipe Fittings, engineered to connect seamless and welded steel pipes in pressure and high-temperature service applications. These fittings are made from carbon steel material and are ideal for use in oil & gas, petrochemical, power generation, and process industries.
The ASTM A234 Grade WPB standard covers wrought carbon steel and alloy steel butt-weld fittings, designed to withstand severe mechanical stress and corrosive environments.
Key Features
Excellent strength and durability under pressure
Suitable for high-temperature applications
Superior corrosion and oxidation resistance
Good weldability and machinability
High dimensional accuracy and smooth surface finish
Compatible with seamless and welded pipes
Specification
| Standard | Specification |
|---|---|
| Product | Carbon Steel Butt Weld Pipe Fittings |
| Grade | ASTM A234 Gr WPB |
| Standard | ASME B16.9, ASME B16.11, MSS-SP-75 |
| Material Type | Wrought Carbon Steel |
| Manufacturing Process | Seamless / Welded / Fabricated |
| Size Range | ½” NB to 48” NB |
| Dimensions | ASME/ANSI B16.9, B16.28 |
| Type | Elbow, Tee, Reducer, Cap, Stub End, Bend |
| Pressure Rating | SCH 10S, SCH 40, SCH 80, SCH 160, XXS |
| End Connection | Beveled, Plain, or Threaded End |
| Form | Seamless / ERW / Welded / Fabricated |
Equivalent Grades
| Standard | Grade Equivalent |
|---|---|
| ASTM | A234 WPB |
| ASME | SA234 WPB |
| EN | 10253-2 Grade S235 / S275 |
| DIN | St37.0 / St52.0 |
| JIS | G3456 STPT370 / STPT410 |
Available Sizes
Seamless: ½” NB to 24” NB
Welded / Fabricated: 24” NB to 72” NB
Wall Thickness: SCH 10 to SCH 160, XXS, Custom thickness on request
ASTM A234 Gr WPB Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.30 |
| Manganese (Mn) | 0.29 – 1.06 |
| Phosphorus (P) | ≤ 0.050 |
| Sulfur (S) | ≤ 0.058 |
| Silicon (Si) | 0.10 – 0.35 |
| Nickel (Ni) | ≤ 0.40 |
| Chromium (Cr) | ≤ 0.40 |
| Copper (Cu) | ≤ 0.40 |
| Molybdenum (Mo) | ≤ 0.15 |
ASTM A234 Gr WPB Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 415 MPa (min) |
| Yield Strength | 240 MPa (min) |
| Elongation | 20% (min) |
| Hardness (HB) | 197 (max) |
ASTM A234 Gr WPB Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1425 – 1540°C |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 60.5 W/m·K |
| Specific Heat | 486 J/kg·K |
Types of ASTM A234 Gr WPB Pipe Fittings
Elbow (45°, 90°, 180° – Long/Short Radius)
Equal & Reducing Tee
Concentric & Eccentric Reducer
End Cap
Stub End (Short / Long Pattern)
Pipe Bend (2D, 3D, 5D, 10D Radius)
Cross Fittings
Corrosion Resistance
ASTM A234 Gr WPB Pipe Fittings possess good resistance to mild corrosive environments, including atmospheric and industrial exposures. The fittings can be coated, galvanized, or painted to enhance corrosion resistance, especially for offshore and marine applications.
Heat Resistance
These fittings exhibit excellent performance in temperatures up to 600°C, making them ideal for use in boilers, heat exchangers, and high-temperature piping systems. Beyond this range, alloy steel fittings are generally preferred.
Heat Treatment
ASTM A234 WPB fittings are typically normalized, tempered, or stress-relieved after forming to refine the grain structure and ensure mechanical integrity. Heat treatment eliminates residual stresses, enhancing ductility and toughness.
Welding
These fittings can be welded using conventional welding methods such as MIG, TIG, and SMAW without requiring preheating for thin sections. However, post-weld heat treatment (PWHT) is recommended for thicker sections to avoid cracking and maintain strength.
Fabrication
ASTM A234 Gr WPB fittings are easily machinable, bendable, and formable. Fabrication processes such as cutting, drilling, and shaping can be performed using standard carbon steel techniques while maintaining high dimensional precision.
Applications
Oil & Gas Pipelines
Petrochemical Plants
Power Generation Units
Water Treatment Systems
Shipbuilding and Offshore Industries
Heat Exchangers & Pressure Vessels
Refineries and Chemical Industries