... standardAISI,GB/T14525-1999 or GB/T12777-2008 national standardMaterialcarbon steel , stainless steel , alloy steel , low-temperature steelCertificationCE, API, ISO9001, BV,SGS,LOIYDPackagingWooden cases ... -15100131291Skype: sunny.zhang698Msn:sales18 at lrpipefitting.comWeb: www.lrpipefitting.com stainless steel 304/316l horizontal expansion joints