RTJ flange

There are many types of RTJ flanges, which are mainly classified according to their nominal diameter (Type A and Type B, i.e. metric and British system), nominal pressure, purpose, structural form, material, sealing surface form, and connection method (diameter and pressure grade are not included). They are divided into plate type flat welding flange (PL), neck type flat welding flange (SO), neck type butt welding flange (WN), integral flange (IF), socket welding flange (SW), threaded flange (Th), loose flange (PJ/PE) Ring loose flange (PJ/JR); According to the form of sealing surface, it can be divided into: RF, MFM, TG, FF and RJ; Flange cover is not included here; According to materials, it can be divided into: cast iron flange, cast steel, forging, Q235, stainless steel flange, plastic flange, etc

The RTJ flange is not easy to deform, has good sealing, and is widely used. It has corresponding requirements for rigidity and elasticity and reasonable butt welding thinning transition. The distance between the weld crater and the joint surface is large, and the joint surface is free from welding temperature deformation. It adopts a more complex trumpet shape structure, which is suitable for pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature. It is generally used for the connection of pipes and valves with PN greater than 2.5MPa; It is also used to transport expensive, flammable and explosive media on the pipeline

The use methods of RTJ flange are as follows:

2. RTJ flange is a kind of pipe fitting, which refers to the flange with neck, with pipe transition and butt welding connection with pipe. RTJ flange is not easy to deform, has good sealing, and is widely used. It has corresponding rigid and elastic requirements and reasonable butt welding thinning transition. The distance between the weld crater and the joint surface is large, and the joint surface is free from welding temperature deformation