... 1/2"-72" thickness:1.7mm-60mm certificate: ISO9001:2000 Flangestainless welding neck flange 1. Pipe Fittings according to ... MSS SP-75 ,ASME B16.9 , ASME16.28 , JIS, DIN,GB, SNSIMaterialA234-WPB, A420-WPL6, A234-WP12, A234-WP11, A234-WP5 ... , A403-WP304, A403-WP304L,A403-WP316.A403-WP316LCertificateGB/T19001-2000-ISO9001:2000Applications Petroleum,Chemical, Power, Gas, Construction, Metallurgy, etc ...