galvanized seamless steel pipes We can supply the products of high quality,favorable ... ,slip on flanges ,blind flanges ,seamless steel pipes ,welded steel pipes ,square steel pipesMATERIALCarbon steel,stainless steel,alloy steelWe can produce according to materials appointed ... -9001:2000,API5L,,CCSWe have biggest pipe fittings and steel pipes production equipment in china,all of prodcts are produced ...