E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
Mar. 11, 2026
ASTM A234 WPB fittings are a common standard for carbon steel butt-welded pipe fittings in industrial piping systems, widely used in industries such as oil, gas, chemical, power, boilers, and pressure pipelines.
Its name actually contains three key pieces of information: ASTM + A234 + WPB.
I. Meaning of ASTM A234 WPB
1. ASTM: ASTM is an abbreviation for ASTM International, meaning the American Society for Testing and Materials, a globally recognized materials standards system.
2. A234: A234 is a number in the ASTM standard, indicating: Standard for forged carbon steel and alloy steel butt-welded pipe fittings for medium- and high-temperature pressure pipelines. Simply put: A234 = Material standard for butt-welded pipe fittings for pressure pipelines.
3. WPB: WPB is a material grade.
W = Wrought
P = Pipe
B = Grade B (B-grade carbon steel)
This means: Forged carbon steel, Grade B pressure pipe fittings.
WPB is one of the most commonly used material grades in A234. II. Common Pipe Fitting Types in ASTM A234 WPB
ASTM A234 WPB is mainly used for butt weld fittings, commonly including:
Elbow
45° Elbow
90° Elbow
180° Elbow
Tee
Equal diameter tee
Reducing tee
Reducer
Concentric reducer
Eccentric reducer
Cap
III. Material Properties of ASTM A234 WPB
Item Content
Material: Carbon steel
Manufacturing Process: Hot forming / Cold forming / Forging
Connection Method: Butt weld connection
Operating Temperature: Medium to high temperature
Strength Grade: Medium strength
Typical Chemical Composition (approximate):
C ≤ 0.30%
Mn 0.29–1.06%
Si ≤ 0.10%
IV. Commonly Matched Pipe Materials for ASTM A234 WPB
In engineering projects, they are often matched as follows:
Pipe
Fittings
ASTM A106 Gr.B ASTM A234 WPB
ASTM A53 Gr.B ASTM A234 WPB
API 5L Gr.B ASTM A234 WPB
This is the most classic combination in oil and gas projects.
V. ASTM A234 WPB Dimensional Standards
Pipe fitting dimensions are usually based on:
ASME B16.9
(Most common)
Sometimes also used:
ASME B16.28
VI. Summary in one sentence
ASTM A234 WPB pipe fittings = Material standard for carbon steel weld neck fittings used in pressure piping systems (the most common industrial pipe fitting material).
Widely used in:
Oil pipelines
Natural gas pipelines
Chemical plants
Power plant boilers
Pressure piping systems
Cangzhou Aosendike Pipe Fittings Manufacturing Co., Ltd. is a large-scale manufacturer specializing in elbows, tees, reducers, and pipe caps, capable of producing ASTM, ANSI, JIS, DIN, GB, and other standards, basically covering all steel materials.
If you have any purchasing needs or questions, please feel free to contact us.
Mobile: 86-13668807131
Website: https://www.authenticfitting.com/
Address: Mengcun Hui Autonomous County, Cangzhou City, Hebei Province
Email: authentic013@steelpipes-fitting.com
Previous: 45° welded elbow
Latest News
Industry News
May. 08, 2026
With the development of global infrastructure, oil and gas, and energy industries, the international market demand for carbon steel pipe fittings is continuously growing.
Industry News
May. 06, 2026
What are ASTM grades? A must-read guide to pipe fitting procurement.
I. What is an ASTM Grade? When purchasing pipe fittings, flanges, or steel pipes, you will often see markings like ASTM A234 WPB or ASTM A105. ASTM grades are material standard grades established by ASTM International to regulate the performance and applications of metallic materials.
Industry News
Apr. 27, 2026
In industrial piping systems, carbon steel pipe fittings are not merely simple connecting components; they directly affect the safety, durability, and operational efficiency of the entire system. The requirements for carbon steel pipe fittings vary significantly under different operating conditions; incorrect selection can not only affect service life but also potentially introduce safety risks.
Authentic is here to help you find the right pipe fittings and flanges for your specific needs.
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Our products comply with international standards such as ASTM, ANSI, JIS, DIN, and GB. We also hold various certifications to assure quality and reliability, including ISO 9001.
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If you need, we will offer you samples for free, but new customers are expected to pay express charge.
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