Subsea Ball Valves
Subsea ball valve design starts with water depth, external pressure, corrosion environment, remote operation, sealing philosophy and project qualification.
Define the operating envelope before selecting the valve construction.
Subsea ball valve design starts with water depth, external pressure, corrosion environment, remote operation, sealing philosophy and project qualification.
Base valve construction still matters
After the service condition is defined, select the underlying floating, trunnion mounted, top entry, fully welded or DBB design according to size, pressure, maintenance access and isolation duty.
Information to include in the RFQ
Include water depth, external pressure, corrosion requirements, coating or cathodic-protection interface, ROV/actuation details and project qualification requirements in the RFQ.
Key design questions for subsea ball valves.
Use these points to define the project design envelope and qualification requirements.
Water Depth & External Pressure
Specify water depth, design external pressure and any hyperbaric or external-pressure qualification requirements.
Corrosion & Materials
Define seawater exposure, corrosion allowance, corrosion-resistant materials, coating and cathodic-protection requirements.
ROV / Actuation Interface
Define the required ROV interface, operator or actuator arrangement and installation constraints.
Subsea Qualification
Include the applicable subsea qualification procedure, external-pressure testing and acceptance criteria in the project requirements.
Technical documents for project review.
For technical evaluation, request the applicable product documents and inspection records for the offered valve configuration.
Product Photos
Additional finished-valve, nameplate and component photos are available for the selected valve configuration.
GA Drawing / Datasheet
GA drawings and datasheets are prepared for the selected size, pressure class and valve configuration.
Testing & Inspection Records
Inspection documentation can include pressure testing, dimensional inspection, PMI, NDE/NDT and coating records as required by the project.