... Carbon Steel A105 Flange Certificate: ISO9001:2008 Size: 1/2"-48" Product: SO Flange, WN Flange, Blind ... ,etc Pipe Carbon Steel A105 FlangeCertificate: ISO9001:2008Size: 1/2"-48"Product: SO Flange, WN Flange, Blind, ... Standard: ASME, AISI, JIS, DIN , GB,BS3) Size:1/2604) Material: A234 WPB, WP11, WP22, WP91,304, ... used in oil, chemical industry, electric power, shipping industry and other pipe projects