DIN 17175 boiler tube OD:1/2"--12" WT:SCH5S--XXS Certificate:PED/KR/DNV/ASME/BV/LLOYD competitive price DIN 17175 boiler tube1.OD:20mm-325mm2.WT:2.5mm-45mm3.standard:GB3087,GB5310 ASME SA-106 ASME SA-192M, ASME SA-209M, ASME SA-210M, ASME SA-213M , ASME SA-335M DIN17175 JIS G34614.Application for the manufacturing of the bolier ,and steam