1. Product Features

High strength: The neck design enhances the strength and bearing capacity of the flange, and can withstand higher pressure and temperature.

Wide range of application: Suitable for various media, especially in high temperature, high pressure, low temperature and chemical corrosion environment.

Excellent sealing: Through welding connection, the combination between the flange and the pipeline is very strong, with excellent sealing performance, reducing the risk of leakage.

Reduced stress concentration: The neck design can effectively reduce stress concentration and avoid the possible breakage of traditional flanges under high pressure.

Applicable to a variety of materials: Neck welding flanges of different materials such as carbon steel, stainless steel, alloy steel, chrome-molybdenum steel, etc. can be selected according to needs to adapt to different working conditions.

High corrosion resistance: Especially in chemical process pipelines, neck welding flanges made of stainless steel, alloy steel and other materials can effectively resist corrosion.

2. Product type

Standard neck welding flange: Conforms to common standards such as GB, ANSI, DIN, JIS, etc., and adapts to the needs of various industries and pipelines.

Long-neck butt-weld flange: The flange has a longer neck and is suitable for systems that require high strength and high sealing.

Blind plate butt-weld flange: It is used to close the opening in the pipeline system to prevent medium leakage and has the same characteristics as the standard butt-weld flange.

3. Technical parameters

4. Material selection

Carbon Steel: Economical and durable, suitable for normal temperature and pressure environment, widely used in oil, gas and other industries.

Stainless Steel: Has good corrosion resistance, widely used in chemical, food, pharmaceutical and other industries, suitable for acid and alkali environment.

Alloy Steel: Suitable for high temperature and high pressure environment, can effectively withstand extreme conditions, suitable for pipelines such as high temperature steam and chemical media.

5. Application field

Oil and gas industry: Neck welding flanges are often used in high-pressure oil and natural gas pipeline systems to ensure the sealing and strength of pipeline connections.

Chemical industry: Suitable for chemical pipelines, especially in environments requiring corrosion resistance and high temperature resistance.

Power industry: Commonly used for the connection of components such as boilers, steam pipelines, and high-pressure cooling systems to ensure the efficient operation of the system.

Pharmaceutical and food industries: Especially stainless steel neck welding flanges are suitable for food, pharmaceutical, beverage and other production environments, and meet hygiene standards.

Marine engineering: Suitable for marine engineering fields such as offshore oil platforms and seawater desalination equipment, resisting seawater corrosion and high pressure.

6. Installation and use

Installation method: The butt-welded flange with neck is connected to the pipeline by butt welding. When welding, the surface of the connection between the flange and the pipeline is required to be smooth to ensure the welding strength.

Welding requirements: When welding, the flange and the end of the pipeline should be clean, the welding process should meet the standards, the weld should be uniform and crack-free, and the welding strength and sealing should be ensured.

Check the sealing: After welding, a pressure test or water pressure test should be performed to ensure that there is no leakage at the flange connection and meet the system's use requirements.

7. Quality assurance

Precision machining: The butt-welded flange with neck adopts precise machining technology during the production process to ensure the dimensional accuracy and surface finish of the flange and ensure the compatibility during installation.

Material testing: All raw materials are strictly inspected to ensure that the material of the flange meets the relevant standards and requirements.

Factory inspection: Each batch of products needs to undergo multiple tests such as pressure testing, welding strength inspection, and appearance inspection to ensure that the product quality meets the use requirements.

Warranty period: Most manufacturers provide a 12-month warranty period, during which free repairs or replacements can be made.

8. Packaging and Transportation

Packing method: Neck welding flanges are usually packaged with wooden boxes, bubble film, steel strips and other packaging materials to ensure that they are not damaged during transportation.

Transportation method: Choose a variety of transportation methods such as road, rail, and sea transportation according to the order volume and destination to ensure timely delivery.

9. Price and customization

Price: The price of neck welding flanges varies according to factors such as material, specification, and pressure level. It is usually more expensive and suitable for high-demand pipeline systems.

Customization service: It can be customized according to customer needs, including neck welding flanges with special materials, non-standard sizes and different pressure levels to meet the needs of special working conditions.

10. Summary

Neck welding flanges have become an indispensable connection component in pipeline systems under high pressure, high temperature and high corrosion environments due to their high strength, good sealing and wide range of applications. It can not only effectively withstand high pressure and high temperature, but also ensure the sealing and safety of the pipeline system. Choosing a suitable neck welding flange can provide a strong guarantee for the stable operation of the pipeline system and is widely used in many industries such as petroleum, chemical industry, and electric power.