尊龙凯时



      The four national valve standards will be implemented on May 1, 2020

      Column：Industry trends Time ：2019-11-16
      Recently, the state administration for market supervision and administration of China (Standardization Administration of China) approved and issued 343 national standards and 2 revision orders of national standards, including...

      Recently, the state administration for market supervision and administration of China (Standardization Administration of China) approved and issued 343 national standards and 2 revision orders of national standards, including "dimensions, product geometric specifications (GPS) and tolerance values of radial bearing stop groove and stop ring".

      No
      		Standard codingStandard nameSubstitute standard numberImplementation date
      1
      		GB/T 12234-2019

      Steel gate valve with stud to cover for petroleum and natural gas

      		GB/T 12234-20072020-5-1
      2
      		GB/T 22652-2019Surfacing welding process evalsuation of valve sealing surfaceGB/T 22652-20082020-5-1
      3
      		GB/T 24925-2019Technical conditions of cryogenic valvesGB/T 24925-20102020-5-1
      4
      		GB/T 38202-2019Installation, use and maintenance of all welded valves
      		2020-5-1