1. Product Features

Enhanced strength: The neck design enhances the connection strength between the flange and the pipe, and is particularly suitable for high-pressure pipeline systems.

Wide range of applications: Widely used in petroleum, chemical, electric power and other industries, suitable for pipeline connections under various temperature and pressure conditions.

High sealing: Through welding connection, it provides better sealing performance than bolt connection and reduces the risk of leakage.

Reduce stress concentration: The neck design helps to disperse stress and avoid problems such as flange rupture under high pressure.

Diverse materials: Different materials such as carbon steel, stainless steel, alloy steel, etc. can be selected according to the needs of the pipeline system to adapt to different working environments.

High reliability: Suitable for pipeline systems under extreme working conditions such as high temperature, high pressure, and low temperature to ensure long-term stable operation.

2. Product type

Standard flat welding flange with neck: It complies with common international standards (such as ANSI, DIN, JIS, etc.) and is widely used in oil, natural gas, chemical and other fields.

Long neck flat welding flange with neck: The flange has a longer neck and is suitable for pipeline systems that need to withstand higher pressure and temperature, providing better strength and stability.

Blind flange with neck: used to close the port of the pipeline to prevent medium leakage, and has the characteristics of standard flat welding flange with neck.

3. Technical parameters

4. Material selection

Carbon steel: economical and durable, suitable for pipeline connection under normal pressure and normal temperature, widely used in oil, natural gas, coal gas and other industries.

Stainless steel: has excellent corrosion resistance, suitable for pipeline connection under acid and alkali corrosion environment, widely used in chemical, food and pharmaceutical and other fields.

Alloy steel: suitable for high temperature and high pressure environment, commonly used in oil, chemical, electric power and other industries, and withstand extreme working conditions.

5. Application field

Oil and gas industry: Neck flat welding flange is widely used in oil and gas pipeline systems, and can withstand pipeline connection requirements under high pressure and high temperature environment.

Chemical industry: suitable for chemical transportation pipelines, especially systems that require corrosion resistance and high temperature resistance, neck flat welding flange provides good sealing and reliability.

Power industry: commonly used in the connection of high temperature and high pressure systems such as boilers and steam pipelines to ensure the strength and safety of pipeline connections.

Food and pharmaceutical industry: Stainless steel neck flat welding flange is widely used in the food and pharmaceutical fields, meets hygiene standards, and is easy to clean and maintain.

Marine engineering: Pipeline systems suitable for seawater pipelines and offshore platforms, corrosion-resistant, and able to operate stably and long-term in marine environments.

6. Installation and use

Installation method: The flat-welded flange with neck is connected to the port of the pipeline by butt welding. During installation, attention should be paid to the cleaning of the welding surface and the welding process to ensure that the strength of the welding is qualified and the sealing performance is good.

Welding requirements: During welding, the welding should be strictly operated in accordance with the standards and specifications to ensure that the weld is uniform and firm, and to avoid leakage due to welding defects.

Pressure test: After welding, a pressure test or water pressure test must be performed to ensure that there is no leakage at the flange connection and meet the working requirements of the system.

Maintenance and overhaul: Regularly check the sealing and welding strength of the flange connection, and promptly clean the dirt that may affect the sealing performance to ensure the long-term stable operation of the pipeline system.

7. Quality assurance

Material testing: All raw materials used for the flat-welded flange with neck will be strictly tested to ensure compliance with relevant standards and technical requirements.

Process assurance: Use advanced production processes and equipment to ensure the processing accuracy and surface finish of the flange and the quality of the flange.

Factory inspection: Each batch of products will undergo multiple inspections before leaving the factory, including dimensional measurement, pressure testing, appearance inspection, etc., to ensure that the quality of the flange meets the design requirements.

Warranty period: Most manufacturers provide a 12-month warranty period. If there are quality problems during the warranty period, returns or repairs can be made.

8. Packaging and transportation

Packaging method: Neck flat welding flanges are usually packaged with wooden boxes, bubble film, steel belts and other packaging materials to avoid damage during transportation.

Transportation method: According to needs and destinations, you can choose a variety of transportation methods such as road, rail, and sea transportation to ensure on-time delivery.

9. Price and customization

Price: The price of neck flat welding flanges will vary according to factors such as material, specification, pressure level, etc. The price is usually more reasonable and suitable for medium and low pressure pipeline systems.

Customization service: Customization services can be provided according to customer needs, including special materials, sizes, pressure levels, etc., to meet the pipeline connection requirements under specific working conditions.

10. Summary

Neck-welded flanges have the characteristics of enhanced strength, good sealing and wide applicability, and are widely used in pipeline systems with high temperature, high pressure and corrosive media. It connects pipelines by welding, can effectively provide safe and reliable sealing and strength, and is suitable for multiple industries such as oil, natural gas, chemical industry, and electricity. Choosing a suitable neck-welded flange can not only improve the safety of the pipeline system, but also ensure its long-term stable operation.