- specifies requirements and gives recommendations for the performance, dimensional and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment, purchasing, repair and re-manufacture of wellhead and christmas tree equipment for use in the petroleum and natural gas industries.
- not apply to field use, field testing or field repair of wellhead and christmas treeequipment.
1.2. APPLICABILITY (see the typical equipment in Figures 1 and 2 below)
- wellhead equipment: casing-head housings, casing-head spools, tubing-head spools, cross-over spools, multi-stage head housings and spools;
- connectors and fittings: cross-over connectors, tubing-head adapters, top connectors, tees and crosses, fluid-sampling devices, adapter and spacer spools;
- casing and tubing hangers: mandrel hangers, slip hangers;
- valves and chokes: single valves, multiple valves, actuated valves, valves prepared for actuators, check valves, chokes, surface and underwater safety valves and actuators, back-pressure valves;
- loose connectors [flanged, threaded, other end connectors (OEC), and welded]: weld neck connectors, blind connectors, threaded connectors, adapter and spacer connectors, bullplugs, valve-removal plugs;
- other equipment: actuators, clamp hubs, pressure boundary penetrations, ring gaskets, running and testing tools (see Annex H), wear bushings (see Annex H).
1.3. SERVICE CONDITIONS : This International Standard defines service conditions, in terms of pressure, temperature and material class for the well-bore constituents, and operating conditions.
1.4. PRODUCT SPECIFICATION LEVELS (PSL): PSL 1, 2, 3, 3G, and 4 define the different levels of technical quality requirements. Annex A provides guidelines (not requirements) for selecting an acceptable PSL.
