塑料管道系统。热塑塑料压力管道用的弹性密封环型接头和机械接头。外部液压条件下防漏密封试验方法。
Plastics piping systems. elastomeric sealing ring type joints and mechanical joints for thermoplastics pressure piping. test method for leaktightness under external hydrostatic pressure.
在土壤压力、规定的管道操作压力和厂内或现场的水压测试下，整个绝缘接头保持完好。
The whole insulation joint is in good condition under soil pressure, specified pipeline operation pressure and factory or field hydraulic test.
在土壤压力、规定的管道操作压力和厂内或现场的水压测试下，整个绝缘接头保持完好。
The whole insulation joint is in good condition under soil pressure, specified pipeline operation pressure and factory or field hydraulic test.
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