API 6A Wellhead accessory- high pressure union: Certification:API 6A Application:oilfield equipment WP:High pressure ... API 6A Wellhead accessory- high pressure union High-pressure union, importing international advanced technology, is forged with high-strength ... valve, mud gate valve, chock valve, etc)3) Fitting(union, manifold,elbows), bop. API 6A Wellhead accessory- high pressure ...