... Specification:1/2"-40" 3.Standard:DIN JIS ANSI 4.Certificate:GL BV DNV Forged Steel ... : DIN2533, DIN 2573, DIN2631, DIN2633,JIS B2220, JIS B 2216, ANSI B 16.5 etc.5.Material: Carbon Steel ... , SO etc.The flange standard: 1.JIS Standard: JIS B 2220, JIS 2216, JIS 7805, JIS B 2219.2.DIN Standard: DIN 2573, ... .API Standard: API6056.Nonstandard FlangesThe flange types:1.JIS Standard: SOP, SOH, BL, PL, WN.2 ...