Introduction to ASTM A234 Fittings
The ASTM A234 specification covers carbon and alloy steel pipe fittings widely used in industrial pipeline projects. These fittings are designed for moderate to high temperature services and are supplied in both seamless and welded types. As a reliable B2B supplier, Jizhong provides ASTM A234 fittings with consistent quality to meet global engineering standards.
What Are Steel Pipe Fittings?
Steel pipe fittings are produced from carbon steel or alloy steel pipes, plates, or forgings and processed into various shapes to support functions such as changing flow direction, adjusting fluid rate, or connecting pipelines. Common fittings include:
These components are essential in oil & gas, water supply, power plants, and other heavy industries where strong and durable connections are required.
ASTM A234 WPB Specification
ASTM A234 WPB is the most widely used grade in this standard.
- W means weldable
- P means pressure
- B refers to Grade B steel, ensuring reliable mechanical strength
Raw material sources include seamless pipes like ASTM A106 Gr.B/C or plates such as ASTM A516 Gr.70. These fittings are manufactured for butt-weld connections, making them suitable for long-term use in pressure pipelines and vessel fabrications.
Mechanical Properties of ASTM A234 WPB
- Tensile Strength: 415 MPa (60,000 psi)
- Yield Strength: 240 MPa (35,000 psi)
- Pressure Ratings: 150 LBS – 9000 LBS
Chemical Composition (Key Limits)
- Carbon: ≤ 0.35%
- Manganese: ≤ 1.35%
- Silicon: ≤ 0.35%
- Cu + Ni + Nb + Mo: ≤ 1.00%
Manufacturing Process at Jizhong
At Jizhong, ASTM A234 fittings are produced through advanced forming methods such as forging, pressing, rolling, bending, and machining. Every stage follows strict inspection and testing protocols:
- Hydrostatic testing
- Hardness & tensile testing
- Surface inspection to avoid defects
We ensure fittings are cooled under controlled conditions to maintain structural integrity.
ASTM A234 Dimensions
- Standards: ANSI / ASME B16.9, B16.28, MSS-SP-43
- Sizes: ½” – 48”
- Thickness: SCH 10 – SCH XXS
Available in forged, threaded, butt-weld, and seamless types.
Alloy Steel Grades in ASTM A234
ASTM A234 also includes alloy grades such as WP1, WP5, WP11, WP22, WP91, suitable for high-pressure and corrosive environments. Jizhong alloy steel fittings are widely used in oil refineries, chemical plants, and power generation industries.
Products include:
- Long radius & short radius elbows
- Eccentric & concentric reducers
- Tees, crosses, couplings, caps, and nipples
Why Choose Jizhong for ASTM A234 Fittings?
- Full compliance with ASTM & ASME standards
- Strict quality control for every batch
- On-time delivery to support contractors and distributors
- Competitive B2B pricing for long-term partnerships
Whether you are sourcing for oil & gas projects, industrial pipelines, or power plant construction, Jizhong ASTM A234 fittings provide durability, reliability, and international standard compliance.
