... : forged. FMC WECO interchangeable. Npt Thread:Butt-weld, soc SpecificationsAPI 6A Wellhead accessory- high pressure union: Certification:API 6A ... WP:High pressureAPI 6A Wellhead accessory- high pressure union High-pressure union, importing international advanced technology, is forged with ... compress-seal. The type mainly consists of: 100#, 200#, 206#, 207#,211#, 400#, 600#, 602#, 1002#, 1003#, 1502 ...