... :ISO9001 4)type: wn, so, pl, bl, thread C22.8 carbon steel welding neck flange1.specificationStandards: ANSI(ASME), AWWA, DIN, EN1092, GOST, JIS ... , BS, UNI, SABSType: welding neck, slip on, bind, threaded, lap-joint, socket weldingPressureMaterial: carbon steel, stainless steelSize: 1/2" to 80 ... 1.4404 1.4541 1.4571/DIN174402.picture C22.8 carbon steel welding neck flange