Oil rotary union

for gasmulti-passagefor high-temperature applications

Overview
DSTI subsea fluid swivel products provide rotational interfaces between flowline equipment and flowline pipe, enabling correct angular positioning during installation and reducing bending moments on structures during lowering and operation. Nearly 200 DSTI subsea swivels have been manufactured, qualified and deployed worldwide.

Applications

• Subsea tree connections
• Production manifold connections
• Free standing hybrid risers (FSHR)
• In-line T connections
• Pipeline end termination (PLET) connections
• Pipeline end manifold (PLEM) connections

Features & Design Highlights

• Metal-to-metal sealing systems for subsea service
• Designs for High Temperature / High Pressure (HTHP) applications
• ROV-operable actuation and interfaces
• Specialized bearing arrangements to absorb bending moments and loads
• Torsion-resistance solutions while swivel is energized
• Available in API flange/hub, Grayloc and other connection types
• Material options to meet specific project requirements
• Complete solutions available including ROV panels, hot stabs and bulkhead fittings

Technical specifications

• Working pressures: up to 15,000+ PSI
• Installation depths: to 3,500+ meters
• Bore sizes: ranging from 2" to 16"+
• Qualified to API 17D, API 6A and Petrobras requirements
• Test capability: equipment testing up to 55" (1400 mm) diameter
• Load capacities: bending loads up to 3,000,000 ft-lbs (≈4100 kNm)
• Tension capacities: up to 3,100,000 lbf (≈13,900 kN)
• Metal-to-metal sealing technology and ROV-operable designs for subsea installation