Standard Code | Standard Title | Standard Class | Order |
---|---|---|---|
GB/T 40080-2021 |
Nondestructive testing of steel tubes—Automated electromagnetic testing of seamless and welded (except submerged arc-welded) steel tubes for the verification of hydraulic leaktightness 钢管无损检测 用于确认无缝和焊接钢管(埋弧焊除外)水压密实性的自动电磁检测方法 |
China National Standards leaktightness |
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GB/T 39383-2020 |
Thermoplastics piping systems for underground non-pressure applications—Test method for leaktightness of elastomeric sealing ring type joints 埋地用无压热塑性塑料管道系统 弹性密封圈接头的密封性能试验方法 |
China National Standards leaktightness |
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GB/T 19471.2-2004 |
Plastics piping systems--Elastomeric-sealing-ring-type socket joints of unplasticized poly(vinyl chloride)(PVC-U)for use with PVC-U pipes--Test method for leaktightness under negative pressure 塑料管道系统 硬聚氯乙烯(PVC-U)管材弹性密封圈式承口接头 负压密封试验方法 |
China National Standards leaktightness |
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