... GB/T8163-2008 2.10#, 20#,35#,45# 3. anneal 4.tolerance on OD+/-0.05 Seamless Carbon Steel tube for ... Liquid Delivery Seamless Carbon Steel tube for Liquid Delivery 1) ... ,2) Spec.: GB/T8163-2008, DIN17175,3) Steel Gr.:10#, 20#,35#,45#4) O.D: 4mm-90mm.5) ... reputations, and welcomed by our clients warmly. Seamless Carbon Steel tube for Liquid Delivery