Treating iron is temporary surface piping and assembled choke manifolds for well testing, fracturing, completion, flow back and well clean-up operation, end connection is Fig 1502, Fig 1002 and Fig 602.
API 6A valves and spools support stronger fluid control and reliable flange connection, they are assembled to be manually-operated choke manifold or hydraulically-operated choke manifold for high pressure well testing and flow back operation.