... even, clean and not exist defects which can affect the function of product such as nick, hollow space, bubble and so ... ,165h no seepage, no brokenPassedQualified5)95,4.4 MPa of hoop stress,1000h no seepage, no brokenPassedQualified Specification: Φ ... -resistance AnticorrosiveLong service lifeEasy reliable installationService Range:Supply system of direct potable pure waterCold and hot water system in ...