easier install and maintainenance use of the combination of elbow and branch pipes and seamless steel pipes DR steel elbow bend pipe1 Size 1/2"-96" DN15-DN12002 Wall thickness Sch5-Sch160XXS 3 Standard ISO, SNSI, JIS, DIN, GB/T124594 Material:Duplex2205/S31803,904L,317L,347H,316Ti,321,304