text modify test Caulking and injection sealing When there is leak at the flange sealing surface, we usually apply clamp injection method. We need to design and manufacture clamp before the operation. If the upper and lower flange is not concentric or has irregular shape, it would be difficult to manufacture the clamp. The following is the introduction of the simple way for the sealing method. ⑴ Application scope ① suitable for the gaskets of different shape like round, oval, square, etc. ② suitable for system temperature -180℃～800℃，system pressure -0.1MPa～20MPa； ③ leaking flange connecting gap≤10mm. ⑵ Operation method ① Pack the proper specification of metallic wire into the flange connecting gap. Caulk the flange edge to form the sealing cavity and inject the sealant. ② If the diameter of the leaking flange is large and is partial leak, it could apply partial sealing method. ③ If the system pressure is less than 2MPa, it could apply the screw filling joint and inject the sealant through the threaded channel between flange bolt and bolt hole.
⒈ Application scope and operation method
1-screw filling joint；
2-injection channel；
3-sealing cavity；
4-brass wire
④ If the system pressure is more than 2MPa，it should drill the hole at the flange edge and tap it, and connect the injection valve.
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