... market:Middle-east,Africa,Asia,America. product name hot expanded seamless steel pipecertificationAPI5L/5CT certificate,CQM ISO9001:2000 approved. ... DIN,EN,ASTM A106/A53.API5L/5CT,JISG AND SO ON.OD21.3-600MMWT6-50MMmaterial20#,45#,16Mn,10 ... boiler and ship-building,liquid service,petroleum cracking,chemical fertilizer equipment,drawing-oil-equipment and structure purpose! hot expanded seamless pipe ...