|Description / Abstract
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This International Standard specifies requirements and gives
recommendations for the performance, dimensional and functional
interchangeability, design, materials, testing, inspection,
welding, marking, handling, storing, shipment, purchasing, repair
and remanufacture of wellhead and christmas tree equipment for use
in the petroleum and natural gas industries.
This International Standard does not apply to field use, field
testing or field repair of wellhead and christmas tree
This International Standard is applicable to the following
a) wellhead equipment:
— casing head housings;
— casing head spools;
— tubing head spools;
— cross-over spools;
— multi-stage head housings and spools.
b) connectors and fittings:
— cross-over connectors;
— tubing head adapters;
— top connectors;
— tees and crosses;
— fluid-sampling devices;
— adapter and spacer spools.
c) casing and tubing hangers:
— mandrel hangers;
— slip hangers.
d) valves and chokes:
— single valves;
— multiple valves;
— actuated valves;
— valves prepared for actuators;
— check valves;
— surface and underwater safety valves and actuators;
— back-pressure valves.
e) loose connectors [flanged, threaded, other end connectors
(OEC), and welded]:
— weld neck connectors;
— blind connectors;
— threaded connectors;
— adapter and spacer connectors;
— valve-removal plugs.
f) other equipment:
— pressure boundary penetrations;
— ring gaskets;
— running and testing tools (in Annex H);
— wear bushings (in Annex H).
The nomenclature used in this International Standard for typical
equipment is shown in Figure 1 and Figure 2. All parts whose
physical dimensions conform to the metric tables incorporated into
the body of this International Standard or to the US Customary
units tables in Annex B are acceptable.
This International Standard defines service conditions, in terms
of pressure, temperature and material class for the well-bore
constituents, and operating conditions.
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