... 71.4Qualified3Longitudinal reversion, %≤31.1Qualified4Hydraulic Test1)20,12.0 MPa of hoop stress,1h no seepage, no brokenPassedQualified2)95, ... stress,22h no seepage, no brokenPassedQualified4)95,4.6 MPa of hoop stress,165h no seepage, no brokenPassedQualified5)95 ... ,4.4 MPa of hoop stress,1000h no seepage, no brokenPassedQualified Specification: ...