Flat Face Weld Neck Flange

Many customers have recognized our flat face weld neck flange. If you need it, our company’s products are your best choice. Welcome everyone to communicate with Elite Piping Manufacture. 

Flat Face Weld Neck Flange Composition

The flat face weld neck flange gasket is positioned between the sealing surfaces of two flanges. When the nut is tightened, a specific pressure is applied to the gasket’s surface, causing it to deform and fill the sealing surface, ensuring a tight and leak-proof connection. Bolts can be inserted into the holes on the flange to connect the two flanges securely, and gaskets are used to seal the flanges.

Connection Method

A flat face weld neck flange is mainly a part that connects pipes. According to its structural type, it can be constructed by threaded connection or welding. A flange connection involves a pair of flanges, gaskets, bolts, and nuts.

Flat Face Weld Neck Flange Characteristic

Flat dace weld neck flanges are mainly used for gas valves and natural gas pipelines because the short neck can improve the stiffness and load-bearing capacity of the flange. Flat welding flanges are used for general media, and necked flat welding flanges are suitable for flammable, explosive, corrosive, and toxic places.

The sealing surface of a flat face weld neck flange can be a convex surface, concave, and convex surface, and tongue and groove surface, which are different in structure, sealing effect, and strength.

Product Process

 The steel plate that produces flat welding flanges should be inspected by ultrasonic and have no delamination defects. Cut the steel into strips, bend and butt weld them to form a circular ring, and create a ring cylinder on the steel’s surface.

When producing butt welding flanges, steel plates must not be directly machined into neck flanges, and certain processes must be used for production and processing.

Sealing Surface Type

The sealing surface types include basic types such as flat surface, raised surface, concave and convex surface, tongue and groove surface, and ring connection surface blue cover.

Manufacturing Process

When connecting flanges and pipes, flat welding and butt welding are the methods typically used. In flat welding, only one side of the flange is welded, and there is no need to weld the inner part of the pipe and flange connection.

The welding installation of the butt welding flange requires double-sided welding of the flange. Therefore, flat welding flanges are generally used for low and medium-pressure pipelines, and butt welding flanges are used for the connection of medium and high-pressure pipelines.

Flat Face Weld Neck Flange Advantages

The flat face weld neck flange saves space and reduces weight while preventing leaks and providing good sealing performance. The smaller flange size is achieved by reducing the seal diameter, which reduces the sealing surface’s cross-section.

Sealing Principle

The sealing principle of a flat  face weld neck flange is that the two sealing surfaces of the bolts squeeze the flange gasket against each other to form a seal. However, this squeezing action can lead to the destruction of the seal. A substantial bolt force must be maintained to maintain the seal, which requires larger bolts.

Application Of  Flat Face Weld Neck Flange

Flat-face weld neck flanges are suitable for relatively low-pressure pipeline systems where pressure fluctuations, vibrations, and oscillations are not serious. The advantage of a flat face weld neck flange is that it is easier to center during welding and assembly, and the price is relatively low, so it has been widely used. 

Maintenance Service 

Flat face weld neck flanges will damage the end face or sealing groove during long-term production and operation, resulting in leakage accidents.

Slinlik flange repair technology and high-precision, fully automatic professional equipment eliminate leakage points and leave no safety hazards. The repair time is short; polymer composite materials can be repaired directly on-site to make the sealing surface meet the technical requirements of sealing, reducing disassembly, transportation time, and costs.

After-Sales Service 

We will maintain close contact with customers after the products are sold. Customers can provide feedback on product problems to us through various methods such as phone calls, emails, and website messages. We will solve customers’ problems as soon as possible. Develop corresponding solutions including but not limited to repair, product replacement, or refund to ensure customer satisfaction.

Other Services

We will promptly inform customers about product updates and upgrades to ensure that customers can purchase the highest quality products. We will also have corresponding preferential services, which are extremely cost-effective.

Precautions

The neck flat welding flange is inserted into the inner hole of the pipe body for overlap welding. The material of the pipe body and the material of the flange can form a three-dimensional weld, thereby improving the welding stability between the flange and the pipe body.

Flat Face Weld Neck Flange Manufacturer

Elite Piping Manufacture Co., Ltd is a manufacturer of flanges and a supplier of pipe fittings and line pipes. You can be sure that our commitment to quality and customer satisfaction backs the products you get. We provide competitive prices, fast transportation time and excellent customer service to ensure you get the best experience.

Our Flat Face Weld Neck Flange Flange

Our flat face weld neck flange has a reasonable structure, high strength, and rigidity, and can withstand various high-temperature and high pressure, repeated bending bad environments, and temperature fluctuations, and will not reduce the sealing performance.