Fully Welded Trunnion Mounted Ball Valve for Oil and Gas Transmission
Fully welded trunnion ball valve with DBB capability and fire-safe design for large-bore, high-pressure petroleum and natural gas transmission pipelines.
| Size Range | 2″–60″ (DN50–DN1500) |
|---|---|
| Pressure Rating | Class 150–2500 (PN16–PN420) |
| Body Material | Carbon steel, alloy steel, stainless steel, duplex steel, etc. |
| Connection Type | RF, BW, RTJ, etc. |
| Operation | Manual, pneumatic, electric, hydraulic, etc. |
Frequently Asked Questions
It removes the body flange leakage points identified in the product specification.
Long-distance petroleum and natural gas transmission pipelines.
API 6D, ASME B16.34, API 6FA and API 607 are stated.
The product specification states -46°C to 200°C.
Pneumatic, electric and hydraulic actuation are listed.
Product Overview
Fully welded trunnion ball valve with DBB capability and fire-safe design for large-bore, high-pressure petroleum and natural gas transmission pipelines.
Quarter-turn operation provides on-off pipeline control using the construction and application features specified for the product.
Final material, connection and actuation selection should match the actual medium, operating conditions and project documentation.
- Product-Specific Construction: Uses the design specified for the product.
- Pipeline Isolation: Designed for industrial on-off service.
- Project Configuration: Listed materials, connections and actuators support selection.
- Engineering Review: Final suitability depends on actual service conditions.
Discuss Your Fully Welded Trunnion Mounted Ball Valve Requirements
Send your pipeline service conditions and project specifications for technical review and product catalogue support.
Applications, Materials and Engineering Selection
Use the project datasheet to confirm size, pressure class, bore, end connection, installation method, temperature, medium, coating, stem extension, actuator and inspection scope.
Typical Applications
- Above-ground and buried oil and gas transmission pipelines
- Compressor, metering, terminal and pipeline station isolation
- Large-bore process and energy pipelines requiring a welded body
Body, Trim and Seat Options
Carbon, alloy, stainless and duplex materials must be checked against pressure-temperature ratings, corrosion and welding requirements. Ball coating, soft-seat material, stem seals, packing and bolting remain project-specific.
Engineering Points to Verify
- Full-bore and piggability requirements
- Seat sealing, cavity relief and double-block-and-bleed arrangement
- Buried-service coating, stem extension and gearbox interface
- Actuator sizing at maximum differential pressure
Related: Ball valve selection guide · Trunnion vs floating ball valve
Fully Welded Ball Valve Procurement and Inspection Checklist
Specify the complete service duty: valve size, pressure class, bore, end connection, body and ball materials, seat and seal materials, installation method, stem extension, coating, operation and pipeline interface.
- Applications: confirm the medium, temperature, pressure, operating frequency, buried or above-ground installation and pigging requirement.
- Standards: state the required design, face-to-face, welding, end-connection, fire-safe and pressure-test standards with applicable editions.
- Inspection: request MTC, welding and NDE records, dimensional report, shell and seat test records, coating report and PMI when specified.
- Buying question: verify whether a fully welded body, full-bore passage, stem extension and project coating system are required.
Final seat design, cavity-relief direction, operating torque and installation details must be reviewed against the approved project datasheet.