... 25mm Standard:ASTM A312, D3/T3 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 for pipe fittings.316L mod is the modified 316L, standard ... , A790, B163, B165GOST: 9940, 9941JIS:: G3459, G3463DIN: 17456, 17458EN 10216-5 316LMod/1.4435/724L seamless pipe/tube/pipe fittings-Fertilizer