... seamless steel pipeStandardsASTM, BS, DIN, JIS, GB, etc.Grade:Q345A/B, Cr5Mo, 12Cr1MoV, 10CrMo910,,27SiMn, 15CrMo, 30CrMo, 34CrMo4, etcOther standard ... supply: High-pressure boiler pipe20G,A106,ST45 Seamless pipes for petroleum20,12CrMo,15CrMo GB5310-95 ASTM A 106-99 DIN ... 17175-79High-presure Seamless pipes for fertilizer making equipment20,16Mn,Q345 Low and medium presure boiled ...