Home > News > Industry News > Production and processing technology of welding flange

Production and processing technology of welding flange

Jun. 18, 2025

Welding flange is a part that connects the pipe and is connected to the pipe end. There are holes on the welding flange, and the two flanges are tightly connected with bolts. So, how should we generally produce and process welding flanges? The production and processing technology of welding flanges is specifically introduced as follows: 1. Whether the annealing temperature of the welding flange reaches the specified temperature, the weld treatment generally adopts solution heat treatment, which is commonly known as "annealing", and the temperature range is 1040-1120℃. 2. Annealing atmosphere: Welding flanges generally use pure hydrogen as the annealing atmosphere, and the atmosphere purity is above 99.99%. If the other part of the atmosphere is an inert gas, the purity can be lower. 3. Protective gas pressure in the welding flange: In order to prevent slight leakage of the welding flange, the protective gas in the furnace should maintain a certain positive pressure. If it is a hydrogen protective gas, it is generally required to be above 20kBar. 4. Sealing of the furnace body of the butt-welded flange: The bright annealing furnace of the butt-welded flange should be closed and isolated from the outside air. When hydrogen is used as a protective gas, only one exhaust port is opened. 5. Welding flanges handle water vapor in the casting furnace. On the one hand, check whether the furnace body material is dry. When the furnace is first loaded, the furnace body material must be dried. Secondly, check whether there is too much water stains in the flange pipes entering the furnace, and do not leak into the furnace, otherwise it will destroy the atmosphere in the furnace.

Cangzhou Aosendik Pipe Fittings Manufacturing Co., Ltd. is a large manufacturer specializing in the production of elbows, tees, reducers, elbows and caps. We can implement ASTM, ANSI, JIS, DIN, GB and other standards, basically covering all types of steel.

If you have any purchasing needs or questions, 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: Say goodbye to downtime losses! High-performance pipe elbow selection guide: improve pipeline system reliability and operational efficiency

Next: Carbon Steel Flanges vs. Stainless Steel Flanges: Which is Best for Your Piping System?

Latest News

Industry News

Sep. 18, 2025

How to store stainless steel tees

Stainless steel tees are high-performance, corrosion-resistant pipe fittings. While there are significant differences between tees and elbows, tees are widely used in pipeline construction. Despite their excellent corrosion resistance, care must be taken during storage to prevent quality issues.
Industry News

Sep. 15, 2025

What should you pay attention to when purchasing pipe fittings

When purchasing pipe fittings, consider multiple factors, including quality, compatibility, price, and supplier reputation, to avoid problems during subsequent installation and use. Key considerations are as follows:
Industry News

Sep. 12, 2025

The key to success in wholesale pipe fittings

To succeed in the pipe fitting wholesale business, a comprehensive approach encompassing market, product, service, and management is required. The following are several key factors:

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.