WNRF flange full name called welding neck flange. It is produced with forged process. It can be divided many types according to different standards, materials, and sizes. Due to the transition structure of the cone neck and the butt welding connection, the strength and rigidity of the flange are strengthened, and the sealing performance is better than that of the slip on flange and plate flange. This type of flange is widely used for the places where request high pressure, temperature and leakproofness.

Some datas about carbon steel WNRF flange:

About the sealing surface “RF”:

“RF” is the short name of raised face a kind of sealing face of flanges. The sealing surface of the flange is flat, and the gasket contact area is large. After pretightening, the gasket is easy to extend or move to both sides, and the sealing property is poor, which is only suitable for low-pressure occasions. Except for RF there are other types of sealing faces such as FM(female and male), RJ (ring joint) and TG(tongue and groove) which have better performance in sealing property can be used for high pressure occasions.

The standard of Welding neck flange:

Carbon steel WNRF flange can be produced according to many kinds of standards including Chinese standard, ASME B16.5 / B16.47, DIN2630/2631/2632/2633/2634/2635/2636/2637, JIS B2220, GOST12821, and EN1092. ASME standard is the most popular flange that adopted worldly.

The surface treatment of carbon steel WNRF flange:

Black painting, yellow painting, anti-rust oil, and epoxy are all surface treatments for flanges. Generally if the customers don’t have special request, anti-rust oil is the commonly used.

Hot saled products weld neck flange, different long weld neck flange and weld neck flange. As a flange manufacturer more than 36 years, we promise to provide high quality product with available price.

Different long weld neck flange and weld neck flange:
1.The specimen destroys the common attack in the experimental steel tube, in which the long weld neck flange weld and the experimental steel tube in the middle of the cylinder body is most likely to be destroyed. M20,M30 bolts in the experiment can satisfy the request, not attack damage.
2.Under design load, all parts of long weld neck flange specimen are in elastic stage. The yield bearing capacity of experimental steel tube and flange neck can reach more than 1.4 times times of design load, and has higher safe storage.
3.In view of the typical specimen of long weld neck flange, the influence of flange diameter, flange plate thickness, flange neck height, pipe diameter, flange neck diameter and flange bolt position on the stress of flange neck and flange plate is discussed.The proposed method can reduce the flange thickness of the specimen to 1000, and the bearing capacity of flange plate and flange neck can reach more than 1.4 times times of design load, and has higher safe storage.
4.Long weld neck flange in the experimental process has a larger bearing capacity, structure before the destruction of the obvious omen, with high safety storage, complete to meet the design load of the strength of the request, safe and reliable, can be implemented in the project application.