Home > News > Industry News > What is a large diameter elbow?

What is a large diameter elbow?

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

Previous: The role of stainless steel elbows in the oil and gas industry

Next: Which pipe fittings are suitable for fire protection engineering?

Latest News

Industry News

Nov. 28, 2025

What are the common specifications and models of elbow pipe fittings?

What are the common specifications and models of elbow pipe fittings?
Industry News

Nov. 26, 2025

What are the uses of seamless steel pipes?

Seamless steel pipe (SMLS) is a type of steel pipe with a hollow cross-section and no seams around its perimeter, widely used in various fields. Its applications and usage scenarios are as follows:
Industry News

Nov. 24, 2025

The role of stainless steel elbows in the oil and gas industry

Stainless steel elbows are critical pipeline connectors in the oil and gas industry. They are used not only to change pipeline direction but also to ensure safe transport under high pressure, high temperature, and highly corrosive environments, making them an indispensable part of oil and gas systems.

Authentic is here to help you find the right pipe fittings and flanges for your specific needs.

Pipe Fittings

Flanges

Carbon Steel Elbow

Stainless Steel Elbow

Alloy Elbow

Carbon Steel Tee

PL Flange

Flat Welding Flange with Neck

Carbon Steel Welded Flange

Alloy Steel Butt Welding Flange

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.)

Get Quote

Have questions or need a custom solution? Reach out to us!

Our team at Authentic is here to help you find the right pipe fittings and flanges for your specific needs.