... /T 14976-2002GB/T 14975-2002 -Decorative Stainless Steel 4-426×1-40 Structural Pipe 10,20,35,45,Q23516Mn Q345BGB ... for chemical fertilizer equipment 20,16Mn,Q345GB6479-2000Fertilizer Equipment-pipeline25-426×6-40 Marine tube 410GB/T5312-1999specificial pressure pipe for ... vessel manufacturing- tube for boilers and overheating14-426*1.5-4.5 line pipe A5L GR.B, X52 ...