... . Standard: ANSI 5. Certification: ISO9001:20 ANSI B16.25 Pipe Weld Neck Flange size1/2"-24"TypeLap-Joint Flange (LJ), Socket ... , CLASS 2500European SeriesPN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160 ... . Your requirement will be treated seriously ANSI B16.25 Pipe Weld Neck Flange