... 1"-12" THK: From SCH10s-SCH160s. GUOBANG STEEL have Pipe and Pipe Fittings process workshop,ISO9001:2008,PED97/23/EC ... ,and AD2000,GOST and RTN certfied, month output:550metric ton for pipe, 300metric ton ... ).WP6XN(N08367).N06601,N08028 etc4) Surface: Sand blasting. polishing.5) Size and Style: ANSI,GB,DIN,JIS etc.6) Application: Liquid Equipment Parts ...