Codes & Standards - Purchase
The subsurface barrier valve is not designed as an emergency or fail-safe flow controlling safety device.
ISO 28781:2010 does not cover installation and maintenance, control systems such as computer systems, and control conduits not integral to the barrier valve. Also not included in ISO 28781:2010 are products covered under ISO 17078, ISO 16070, ISO 14310, ISO 10432, ISO 10423 and the following products: downhole chokes, wellhead plugs, sliding sleeves, casing-mounted flow-control valves, injection valves, well-condition-activated valves or drill-stem test tools. ISO 28781:2010 does not cover the connections to the well conduit.