E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
Nov. 10, 2025
I. Classification by Angle (Most Commonly Used) This is the most frequently mentioned method in construction and procurement:
45° Elbow: Gentle turn, suitable for pipelines with low pressure and slow flow.
90° Elbow: Most widely used, used to change direction.
180° Elbow: Commonly used in reflux, circulation, and heat exchange systems.
In addition, non-standard angles can also be made, such as 30°, 60°, 75°, 135°, etc., customized according to requirements.
II. Classification by Manufacturing Process
Push-formed elbows:** Smooth surface, low fluid resistance, commonly used in high-pressure, large-diameter applications.
Stamped elbows:** Formed by pressing steel plates, suitable for medium to large diameters.
Welded elbows:** Butt-welded to the pipe, good sealing, high strength, used in high-pressure environments.
Pipe-bending elbows:** Bent from a single pipe, fewer weld joints, complete structure.
III. Classification by Connection Method
Butt-welded elbows:** Most commonly used, high strength, good sealing, used in medium to high-pressure pipelines.
Threaded elbows:** Small diameter, easy to install and disassemble, mostly used in low-pressure pipelines.
Flanged elbows:** Suitable for pipelines requiring frequent disassembly or maintenance.
Socket-welded elbows:** Commonly found in small-diameter high-pressure pipelines, providing even better sealing after welding.
IV. Classification by Bending Radius
Long radius elbows (LR):** R=1.5D, low flow resistance, most commonly used in industrial pipelines.
Short radius elbows (SR):** R=1.0D Used when pipeline space is limited, but with greater fluid resistance.
V. Classification by Pressure Rating
Common Standards: ANSI, GB, HG, SH… Pressure ratings range from PN1.0MPa to PN40MPa, selected according to working conditions for petroleum, chemical, boiler, etc.
VI. Classification by Application/Industry Specialty
General Fluid Transport Elbows
Wear-resistant Elbows (for transporting pulverized coal, mortar)
Corrosion-resistant Lined Elbows (lined with rubber, plastic, or ceramic)
Pressure Pipeline Special Elbows (requires testing and certification)
VII. Classification by Carbon Content
1. By Carbon Content Percentage: Low-carbon steel (C: ≤0.25%), Medium-carbon steel (C: 0.25% ≤ C ≤ 0.6%), High-carbon steel (C: >0.6%). Higher carbon content results in higher hardness and strength, but lower plasticity.
2. Classification by steel quality (mainly referring to the content of impurities sulfur and phosphorus): Ordinary carbon steel (S ≤0.055%, P ≤0.045%), high-quality carbon steel (S ≤0.040%, P ≤0.040%), and premium high-quality carbon steel (S ≤0.030%, P ≤0.035%).
3. Classification by application field: Carbon structural steel: mainly used in bridges, ships, building components, and mechanical parts.
Cangzhou Aosendike Pipe Fittings Manufacturing Co., Ltd. is a large-scale manufacturer specializing in elbows, tees, reducers, and pipe caps. We can execute ASTM, ANSI, JIS, DIN, GB, and other standards, basically covering all types of steel.
For any purchasing needs or inquiries, please contact us.
Mobile: 86-13668807131
Website: https://www.authenticfitting.com/
Address: Mengcun Hui Autonomous County, Cangzhou City, Hebei Province
Email: authentic013@steelpipes-fitting.com
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Authentic is here to help you find the right pipe fittings and flanges for your specific needs.
FAQ
What certifications do your products have?
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.
How can I get some samples?
If you need, we will offer you samples for free, but new customers are expected to pay express charge.
To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru, USA, Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.)
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authentic013@steelpipes-fitting.com
+86 13668807131
Donghe Industrial Zone, Mengcun County, Cangzhou City, Hebei Province
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