GB/T 22091.1-2008 《Gauges for pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 1:Verification of parallel internal and taper external threads》 Related products

GB/T 2 2091.1 - 2008 stipulates the first part of the 55 ° sealing pipe thread gauge. Mainly for inspection of cylindrical internal threads and conical external threads, the form, size, tolerance and other key specifications of the gauge are clarified. Strict requirements are put forward for the manufacturing accuracy and surface mass of the gauge, and the inspection method and judgment rules are described in detail. Provide a standard basis for the production, calibrating and use of 55 ° sealing pipe thread gauges, ensure the sealing and interchangeability of cylindrical internal threads and conical external threads, and ensure the relevant pipeline connection mass.