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| International Standard Category: Measuring instruments |
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
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;
| Category No.: | 17.040.30 | Valid Status: | valid |
| Issued Organization: | AQSIQ; SAC | Issued Date: | 2008-6-25 |
| Implemented Date: | 2009-1-1 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
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