... weld, soc SpecificationsAPI 6A Wellhead accessory- high pressure union: 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 ... 211#, 400#, 600#, 602#, 1002#, 1003#, 1502# and 2002#. It is an important part for transporting oil. Water, fracturing ...