GB/T 20324-2006
G系列圆柱管螺纹圆板牙
Circular dies for parallel pipe threads - G series
2006-07-20
GB/T 20328-2023
R系列圆锥管螺纹圆板牙
Circular screwing dies of R series for taper pipe threads
2023-09-07
JB/T 8364.1-2010
60°圆锥管螺纹刀具 第1部分：60°圆锥管螺纹圆板牙
Tools for taper pipe threads with 60°thread angle-Part 1:Circular screwing die for taper pipe threads with 60°thread angle
2010-02-21
GB/T 7306.1-2000
55°密封管螺纹 第1部分:圆柱内螺纹与圆锥外螺纹
Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads--Part 1:Parallel internal and taper external threads
2000-07-24
GB/T 22091.1-2008
55°密封管螺纹量规 第1部分：用于检验圆柱内螺纹与圆锥外螺纹
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
2008-06-25