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
MOD ISO 7-2:2000
全国量具量仪标准化技术委员会(SAC/TC 132)
GB/T 22091的本部分规定了55°密封管螺纹量规的设计、尺寸和制造公差、检验、标记等。
本部分规定的量规体系1)适用于检验GB/T 7306.12000规定的圆柱内螺纹和圆锥外螺纹。
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