Isolation joint

High insulation Steel degrees Long lifespan Buried installation

   QDQ - JD series insulation joint is referred to electric insulation performance of the pipe joint that the sealing performance and electrical method corrosion protection engineering demand accord with buried steel requirements . It contains assembly, insulating plate, filler, seal ring, nozzle stub, etc.The insulation joint with welding end integral structur manufacturing (buried, free maintenance) is the Italian high and new technologywhich is introduced by company in the ninety s, the internal structure type O or U o-ring seal, leading in the domestic market up to now. Strict implementation of production and manufacturing accord with GB1501998 "steel pressure vessel", HG20583-98 "steel chemical container structure design regulations and JB4730-2005" pressure vessel NDT "and so on, the quality of the product is improved steadily.

 

Structure characteristics

 

QDQ - JD series insulation joint welding end integral structure. Main structure for whole forging or forging ontology and nipple (steel plate or steel tube) welding connection structure.

 

QDQ - JD series of the insulation joint pressure seal type O or U type self-tightening sealing ring and ring by molding, have permanent residual elastic ensure joint reliable seal.

 

QDQ - JD series insulation joint insulation ring using a high pressure resistance (not less than 350N/mm2), low water absorption, high electrical insulating strength, anti-aging materials, insulation resistance value is more than 10MΩ, far bigger than other insulation joint resistance, thus greatly improving the insulation and to reduce the leakage current, , give full play to the cathode protection,improve the operation life of protected pipeline