... -48 " DN10-DN1200 Executive standard :GB ANSI DIN cangzhou aolong import & export trade co., ltdcangzhou aolong steel pipe co., ltd 1.Name ... .9 DIN 5.Use: brewage , beverage,food papermaking, pharmacycangzhou aolong import & export trade co., ltdcangzhou aolong steel pipe co., ltd cangzhou aolong ...