Carbon Steel Pipe Bends

Carbon steel buttweld pipe bends are essential fittings designed to alter the flow direction in piping systems. They are a dominant component in industrial pipelines, accounting for approximately 80% of all fittings used. Our buttweld pipe bends are ideal for applications requiring gradual, long-distance transitions. The primary materials for these fittings are ASTM A234 WPB and A106B, ensuring reliability and performance.

Key Features:

Function: Efficiently changes the direction of fluid flow in pipelines.
Dominant Use: The most widely used fitting in piping systems.
Primary Materials: Manufactured from high-quality carbon steel grades such as ASTM A234 WPB and A106B.

What is ASTM A234 WPB?

ASTM A234 WPB refers to Wrought Carbon Steel Pipe Fittings suitable for moderate and high-temperature service. It is the most commonly used material grade for butt weld fittings such as elbows, tees, reducers, and bends.
ASTM A234 is a Standard Specification for steel pipe fittings includes carbon and alloy steel material for moderate and high temperature services. It covers steel fittings of seamless and welded types.

Grades in ASTM A234
ASTM A234 specification has many grades, such as WPB, WPC, WP5, WP9 WP11, WP12, WP22, WP91 and so on.

Pipe Bend vs. Pipe Elbow

While both pipe bends and elbows serve to change pipe direction, the key difference lies in their bending radius.
Pipe Bends: Feature a larger bending radius, typically greater than 1.5 times the pipe diameter (D). Common radii include 2D, 2.5D, 3D, 5D, and up to 10D, allowing for a smoother flow and less pressure drop.
Pipe Elbows: Have a tighter radius, available in 1D (Short Radius) and 1.5D (Long Radius) configurations.

Specifications

Available Grades: ASTM A234 WPB, WPC; ASTM A106B; ASTM A860 WPHY 42, 46, 52, 60, 65, 70.
Size Range: DN20 to DN1200.
Common Angles: 45°, 90°, and 180°.

Available Types

We offer both seamless and welded pipe bends to meet diverse project requirements.

1. Seamless Pipe Bends

Manufactured from seamless pipes, these bends are ideal for high-temperature and high-pressure applications.
Manufacturing: Wrought from a single piece of seamless pipe.
Advantages:
Excellent resistance to high temperatures and impacts.
Superior thermal conductivity.
Provides strong, dynamic branch connections.

2. Welded Pipe Bends

Constructed from steel plates with a welded seam, these bends offer a cost-effective and precise solution.
Manufacturing: Fabricated from steel plate with a longitudinal weld seam. All welded bends undergo rigorous flaw detection.
Advantages:
Cost-effective and simple to manufacture.
High precision and consistency.
Excellent overall performance for a wide range of applications.

Testing & Quality Assurance：

• Dimensional & Visual Inspection
• Hydro Testing (on request)
• Ultrasonic / Radiography (for special projects)
• Third-Party Inspection (TPI) available

Applications:

• Steam & Thermal Piping
• Oil Refineries & Gas Plants
• Boiler & Power Piping
• Chemical Processing
• Water Treatment & Fabrication

We stand by the principles of quality and safety, exporting good-quality carbon steel pipe bends.
Our Carbon Steel ASTM A234 WPB Seamless Pipe Bend products are supplied with test certificates and with finished products.