UNI EN ISO 13628-4 : 2012

1. Scope
2. Normative references
3. Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
3.2 Symbols and abbreviations
4. Service conditions and product specification levels
4.1 Service conditions
4.2 Product specification levels (PSL)
5. Common system requirements
5.1 Design and performance requirements
5.2 Materials
5.3 Welding
5.4 Quality control
5.5 Equipment marking
5.6 Storing and shipping
6. Specific requirements - Subsea tree assemblies
6.1 Design
6.2 Testing of subsea tree assemblies
6.3 Marking
6.4 Storing and shipping
7. Specific requirements - Subsea tree related equipment
        and sub-assemblies
7.1 Flanged end and outlet connections
7.2 ISO clamp hub-type connections
7.3 Threaded connections
7.4 Other end connectors
7.5 Studs, nuts and bolting
7.6 Ring gaskets
7.7 Tree connectors and tubing hanger spools
7.8 Tree stab subs and seal subs
7.9 Valves, valve blocks and actuators
7.10 TFL wye spool and diverter
7.11 Re-entry spool
7.12 Subsea tree cap
7.13 Tree cap running tool
7.14 Tree guide frame
7.15 Tree running tool
7.16 Tree piping
7.17 Flowline connector systems
7.18 Control pod running tool
7.19 Flowline connector support frame running/
        retrieving tools and related system interfaces
7.20 Tree-mounted hydraulic/electric control interfaces
7.21 Subsea chokes and actuators
7.22 Miscellaneous equipment
8. Specific requirements - Subsea wellhead
8.1 General
8.2 Temporary guide base
8.3 Permanent guide base
8.4 Conductor housing
8.5 Wellhead housing
8.6 Casing hangers
9. Specific requirements - Subsea tubing hanger system
9.1 General
9.2 Design
9.3 Materials
9.4 Testing
10. Specific requirements - Conventional mudline
        suspension equipment
10.1 General
10.2 Mudline suspension-landing/elevation ring
10.3 Casing hangers
10.4 Casing hanger running and tieback tools
10.5 Abandonment caps
10.6 Tieback adapters - Mudline conversion equipment
        for subsea completions
10.7 Tubing hanger spools - Mudline conversion
        equipment for subsea completions
10.8 Tubing hanger system - Mudline conversion
        equipment for subsea completions
11. Scope specific requirements - Drill-through
        mudline suspension equipment
11.1 General
11.2 Conductor housing
11.3 508 mm (20 in) or 473 mm (18 5/8 in) casing hanger
11.4 Wellhead housing
11.5 Casing hangers
11.6 Annulus seal assemblies
11.7 Bore protectors and wear bushings
11.8 Abandonment caps
11.9 Running, retrieving and tsting tools
12. Purchasing guide lines
12.1 General
12.2 Typical wellhead and tree configurations
12.3 Product specification levels
12.4 Material class rating
Annex A (informative) Conventional subsea trees
Annex B (informative) Horizontal subsea trees
Annex C (informative) Subsea wellhead
Annex D (informative) Subsea tubing hanger
Annex E (normative) Conventional mudline suspension and
                      conversion system
Annex F (informative) Drill-through mudline suspension
                      systems
Annex G (normative) Recommended flange bolt torques
Annex H (normative) Design and testing of subsea wellhead
                      running, retrieving and testing tools
Annex I (informative) Procedure for the application of a
                      coating system
Bibliography

Defines conventional mudline wellhead, subsea copewellhead, drill through mudline wellhead, conventional subsea trees and horizontal subsea trees. It also defines the associated tooling required to handle, test and install the equipment. Areas of design, material, welding, quality control (including factory acceptance testing), marking, storing and shipping for both individual sub-assemblies (used to build complete subsea tree assemblies) and complete subsea tree assemblies, are also specified.