In high-pressure and high-temperature industries, the reliability of pipe fittings is critical for ensuring system safety and efficiency. ASTM A234 WPB pulled bends are widely used for changing the direction of fluid flow in pipelines without compromising strength or integrity. Manufactured under strict standards, these bends combine excellent mechanical properties with proven durability, making them a preferred choice for power plants, refineries, petrochemical facilities, and offshore projects.

Haihao Group pulled bends ready for shipment to Vietnam

What Are ASTM A234 WPB Pulled Bends?

ASTM A234 WPB refers to wrought carbon steel fittings designed for moderate and high-temperature service. Unlike standard elbows, pulled bends are formed by a hot induction bending process that gradually curves the pipe to the required angle—typically 90° or 180°—without welding seams.

• Material: Carbon steel grade WPB ensures good toughness, weldability, and resistance to stress.
• Manufacturing: The induction bending process minimizes wall thinning, ovality, and internal defects.
• Design: Pulled bends are available in multiple radii (e.g., 3D, 5D, or custom) to match pipeline design requirements.

ASTM A234 WPB 90 degree 3D pulled bend supplied by Haihao Group

Key Advantages of Pulled Bends

• Seamless Construction: No weld seams, reducing risk of leakage or corrosion.
• Enhanced Flow Efficiency: Smooth curvature lowers pressure drop compared to welded elbows.
• Dimensional Accuracy: Precise radius control meets exact engineering specifications.
• Strength and Reliability: Suitable for pipelines under high pressure, thermal cycling, and heavy loads.

Carbon steel 2D, 3D, and 5D pulled bends ASME B16.9

Applications Across Industries

Pulled bends made of ASTM A234 WPB carbon steel are integral to many industries where durability and safety cannot be compromised:

• Petrochemical & Refinery Units: For handling hydrocarbons under high pressure and temperature.
• Power Generation: In steam lines and boiler systems requiring thermal stress resistance.
• Offshore & Marine Engineering: Reliable in corrosive environments with continuous fluid flow.
• Oil & Gas Pipelines: Long-distance pipelines where seamless bends improve efficiency and reduce maintenance.

Quality Assurance by Haihao Group

At Haihao Group, each ASTM A234 WPB pulled bend is produced under rigorous quality control. From raw material inspection to final dimensional checks, our process ensures compliance with international standards. We provide full documentation, including:

• Material test certificates (MTC)
• Dimensional measurement reports
• Non-destructive testing (NDT) results
• Protective end caps and proper packaging for safe delivery

ASTM A234 WPB pulled bends represent a reliable and cost-effective solution for pipeline systems requiring strength, precision, and long-term performance. With their superior forming process and robust mechanical properties, these fittings continue to support critical infrastructure worldwide.