SUBSEA VALVES

Introduction into subsea valving and flow control 
ABV Energy manufactures complete integrated units of subsea valve, actuator and ROV receptacle tool.
 
With a very strong Quality Assurance and Engineering Dept., ABV Energy is able to design and
manufacture the most specific and customized actuated valves according to the project requirements. Subsea Valves and actuators are critical components to any offshore installation.
Any subsea intervention is costly, time consuming and extremely difficult, and any failure would
result in loss of profit for the Operators and End Users.
subsea

Type of applications:

- Pipeline subsea valves
- Subsea Manifolds
- Line tees for future tie-ins
- Jacket flooding valves
- SSIV (Sub Sea Isolation Valves)
- PLEM ESDV and On/Off Valves
- Semi-submersible Buoy and Turret

Type of valves used in subsea environments:


Ball Valves
Generally Piggable type, they are used normally in subsea pipeline
Possibility of Seat design metal to metal with tungsten carbide overlay.
Corrosion Resistant Alloys on valve dynamic sealing parts and ring joint grooves
Redundant sealing, for increased reliability of the valve

Through Conduit Slab and Double Expanding Gate Valves
They are used normally in subsea manifolds or pipelines, when there are fluid mixes of liquid, gas and sand.
The valve design is suitable for high percentage of sand or solid particles inside the fluid and very high pressure (normally above 5000 psi)
Thanks to their Through Conduit Design, they are fully Piggable.
Possibility of Seat design metal to metal with tungsten carbide overlay.
The Double Expanding Gate Valves are used when a DB&B is required for isolating the downstream cavity

Check Valves
Piggable type, they are used normally in subsea pipelines.
On request, they can be provided with Override Tool (ROV Operable) for allowing Piggability of both sides. The Valves are operated by

Type of operators
 
Shallow water (normally down to 75 meters water depth)
- by Diver
- by ROV receptacle tool
- remotely by Hydraulic Actuators with or without ROV receptacle tool / Handwheel override

Deepwater (normally down to 3500 meters water depth)
- By ROV receptacle tool
- by Hydraulic actuators with or without ROV receptacle tool override in case of hydraulic failure

Main standards
API 17D/ISO 13628-4 (Specification of subsea equipment and well head equipment)
API 17A/ ISO 13628-1 (Design and Operation of Subsea Production Systems)
API 17H/ ISO 13628-8 (Remotely Operated Vehicle (ROV) interfaces on subsea production systems)
API 6DSS/ISO 14723 (Specification on Subsea Pipeline Valve)
ISO 10423 (drilling and production equipment)
Norsok –U-001 (subsea production system)
Norsok – L-001 (piping and valves)
Norsok – M-001 (material selection)

Testing
Subsea valves and actuators are tested and inspected in accordance with:
ISO 10423
API 6A (at PSL Level)
 
- Some other types of test (other than the standards for the above-surface valves and actuators)
are:
- Gas testing according to API 6D / API 6A PSL 3G
- Performance verification test according to API 6A PR 2
- Hyperbaric testing
- Bending calculation and test
- Seismic test