... name:weld neck flange material:carbon steel size:1/2'~100' standard:ASME DIN JIS certificates;API ISO BV ABS Product ... conditions.SizeWeld neck flange: 1/2"~100" DN10~DN4000PressureAmerican Series: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500 European Series: PN 2 ... .5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100 ...