The structure of the chemical thermocouple type B fixed flange is a flat welded steel flange (JB81-94), which is equivalent to the standard of the Ministry of Chemical Industry (HG5010-58, HG5019-58). It adopts a smooth sealing surface, and the nominal pressure is Pgu003d25kgf/ cm2. For general requirements. C type fixed flange, which is also a flat welded steel flange (JB81—94), which is equivalent to the standard of the Ministry of Chemical Industry (HG5010—58, HG5019—58). It adopts a concave and convex sealing surface. The nominal pressure Pgu003d25kgf/ cm2 is suitable for toxic and harmful media. Has a strong anti-leakage performance. The D-type fixed flange is a butt-welded steel flange (JB82—94) which is equivalent to the standard of the Ministry of Chemical Industry (HG5016—58). It adopts a concave and convex sealing surface. The nominal pressure Pgu003d100kgf/cm 2 has good sealing performance and is suitable for Where there are certain requirements for sealing and pressure resistance. Application of chemical thermocouple The thermocouple protection tube adopts a special structure to make it close to the inside of the cracking furnace tube without affecting the flow of materials. It is suitable for the temperature measurement and control of the cracking furnace during the production of ethylene. It is suitable for petroleum, chemical industry, etc. Temperature measurement and control of high temperature and high pressure places in the production process. It is an indispensable temperature for oil refineries and high pressure polyethylene.
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