E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
Nov. 19, 2025
Large-diameter elbows, simply put, are pipe bends with a larger diameter, typically referring to elbows with a nominal diameter of DN300 and above. Some also include elbows with DN400, DN500, DN600, and even those exceeding 1000mm in diameter.
Let me explain in more detail: What is a large-diameter elbow?
A large-diameter elbow is a type of bending pipe fitting installed on large-diameter pipelines to change the direction of the pipeline. Because of its large diameter, thick walls, and high pressure requirements, its manufacturing process and installation requirements are more stringent than those of ordinary elbows.
Where are they typically used?
Large-diameter elbows are commonly found in: Municipal pipe networks (water supply, drainage, rainwater) Fire protection system main pipelines Petrochemical pipelines Power plant boilers and circulating water systems Large factories or underground pipe corridors Common materials Carbon steel (Q235, Q345) Stainless steel (304/316) Alloy steel Ductile iron PE (polyethylene) large-diameter elbows Why are large-diameter elbows special?
They are more "difficult to manufacture" than ordinary elbows, mainly because: 1. High manufacturing difficulty Due to their large diameter, conventional molds cannot be used directly. They require: Push forming Pressing Roll welding Segmented welding 2. Difficult transportation and hoisting DN600 and DN800 elbows are very large, requiring cranes for handling and positioning. 3. High Welding Requirements: Long welds and thick walls easily generate stress, requiring: Multi-layer, multi-pass welding; Post-weld flaw detection; Some require heat treatment. Cangzhou Aosendike Pipe Fittings Manufacturing Co., Ltd. is a large-scale manufacturer specializing in elbows, tees, reducers, and pipe caps. We can execute standards such as ASTM, ANSI, JIS, DIN, and GB, 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
Latest News
Industry News
Aug. 07, 2026
Advantages of seamless carbon steel elbows
The raw material for seamless carbon steel elbows is seamless steel pipe. The main production process involves heating and piercing a round tube billet, then rolling it using three-roll cross rolling, continuous rolling, or extrusion to set (or reduce) the outer diameter of the pipe. After cooling, it is straightened. It undergoes direct hydrostatic testing (or flaw detection), is marked, and then stored. Schxx represents the wall thickness grade; 180e (S) indicates a short-radius 180° carbon steel elbow, and 180e (L) indicates a long-radius 180° elbow; 90E (S) indicates a short-radius 90° carbon steel elbow, and 90e (L) indicates a long-radius 90° elbow; 45
Industry News
Aug. 05, 2026
180° carbon steel pipe elbow manufacturing process
The most common manufacturing process for carbon steel pipe bends is hot forming. Hot forming is divided into two types: hot push bending and hot heating bending. Our 180° carbon steel pipe bends are manufactured using the hot push process. The process flow diagram is shown below.
Industry News
Aug. 03, 2026
What are the advantages of using sliding flanges?
A sliding flange is a type of slip-on flange. Slip-on welding involves welding only the outer layer, not the inner layer. Slip-on flanges are typically used for medium- and low-pressure pipelines with a nominal pressure less than 2.5 MPa. There are four types of sealing faces for slip-on flanges: flat face, raised face (RF), FM/M, and tongue and groove (TG). Flat face is the most widely used and the cheapest. A sliding flange is a slip-on flange with a short neck. Carbon steel sliding flanges, or SO flanges, are generally cheaper than welded neck flanges, which is why customers often choose sliding flanges. As the name suggests, a sliding flange fits over a
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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Our team at Authentic is here to help you find the right pipe fittings and flanges for your specific needs.
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authentic013@steelpipes-fitting.com
+86 13668807131
Donghe Industrial Zone, Mengcun County, Cangzhou City, Hebei Province
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