| a. seamless steel pipe :material 20#,45#,16Mn,specification,dia57-630mm
b. high frequency weld tube :material Q235A/B,specification,dia15-159mm
c. galvanized pipe: material Q235A/B ,specification, dia 15-80mm
d. stainless steel pipe: material 304,316,321,430,specification ,dia 15-159mm
e. cast... |