Check Valves for Oil & Gas Pipelines
API 6D trunnion ball valves, slab gate, and dual-plate check valves for crude oil, natural gas, and multiphase pipeline systems.
Which check valves are used for oil & gas pipelines?
Onshore and offshore pipelines handling crude oil, natural gas, condensate, and multiphase fluids require API 6D-certified valves with proven fire-safety, anti-static design, and NACE MR0175 compliance for sour service. Vajra supplies the full valve complement - from pig launcher/receiver isolation to emergency shutdown - with complete documentation and third-party inspection.
Dual-Plate Check Valve
Compact, low-pressure-drop non-return valve for pipeline compressor and pump stations
Critical Requirements
- API 6D certification - mandatory for all pipeline isolation valves
- Fire-safe design per API 607 / API 6FA for hydrocarbon service
- Anti-static design - electrical continuity between ball/stem and body
- NACE MR0175 / ISO 15156 compliance for H₂S / sour service
- Full-bore (through-conduit) design for pigging compatibility
- ESD (Emergency Shutdown) rated assemblies with SIL 2/3 compliance
Service Challenges
- H₂S (hydrogen sulphide) - sulphide stress cracking risk; NACE-compliant materials mandatory
- Crude oil with wax/paraffin - full-bore design prevents blockage
- Sour gas (CO₂ + H₂S) - duplex or super duplex stainless for corrosion resistance
- LNG / cryogenic gas - low-temperature impact-tested A350 LF2 or SS 316 materials
- High H₂O cut crude - duplex stainless or Inconel overlay for erosion-corrosion
Vajra Check Valves
Non-return valves to prevent backflow and protect equipment in piping systems.
See the full Check Valves rangeOther valves for oil & gas pipelines
Check Valves for other applications
Connected Engineering
Need check valves for oil & gas pipelines?
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