... 2002 -Decorative Stainless Steel 4-426×1-40 Structural Pipe 10,20,35,45,Q23516Mn Q345BGB/T8162-2008--for the general ... -530×1.5-36 high-pressure seamless pipe for chemical fertilizer equipment 20,16Mn,Q345GB6479-2000Fertilizer Equipment-pipeline25-426×6- ... Rectangular TubeQ195,Q235,Q345,20#GB/T6278-2002 Structure, decoration, construction20*20-500*500 ductile iron pipe-ironGB/T13295-2003 ISO2531/ ...