... 5.Quick delivery 1.Carbon Steel Weld Neck Flange ANSI B16.52.Size: 1/2"-72"3.Wall Thickness: ... .4571JIS:SUS304, SUS304L, SUS316, SUS316L, SUS321 6.Standard: ASME B16.9, ASME B 16.28, JIS2311, JIS2312, JIS2313, DIN2605 ... 75, BS, EN7.Application range: petroleum,chemical,oil and gas transportation,power,chemical fertilizer,nuclear power etc.8.Certification ... ,CE,HSE Carbon Steel Weld Neck Flange ANSI B16.5