... ,SS Astm,Api5L,Api5CT standard Professional supplier of Seamless steel pipeWe manufacture spiral steel pipe with good quality as per API5L,GB,JIS, ... caps as percustomer's requirements;with FBE internal coating for water steel pipes.10.MaterialA53(A,B), A106(B,C) ... mineral slurry and other low-middle pressure liquids. Also for chemical industry, building structure,heat-supply and pile driving projects ...