... , construction industry, domestic installation and otherCertificatesISO-9001/2000,API,PEDQualityHigh LeverSpecial steel elbow design available as requirement! NAME:90 DEGREE BUTT-WELDED STEEL ELBOW FOR ... : Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc. NAME:45 DEGREE BUTT-WELDED STEEL ELBOW FOR PIPESMATERIAL:A234-WPB.A420-WPL6.A234-WP12 ...