... : Certification:API 6A Application:oilfield equipment WP:High pressureAPI 6A Wellhead accessory- high pressure union High-pressure union, importing international advanced technology, is forged with ... , butt-weld and compress-seal. The type mainly consists of: 100#, 200#, 206#, 207#,211#, 400#, 600#, 602#, 1002#, 1003#, 1502 ...