This article is written for Pressure Relief Valve used in oilfield API 6A high-pressure flowline, wellhead and manifold service. The product should be confirmed by its real oilfield service position, not only by a short catalogue name. For API oilfield equipment, the useful specification combines pressure rating, nominal size, end connection, service condition, material or seal requirements, and inspection documents.
Pressure Relief Valve, also known as Safety Relief Valve, is used for overpressure protection in high-pressure flowline and manifold systems. It is used on cementing and fracturing pump units, high-pressure service lines, pressure-pumping manifold skids, and high-pressure high-flow equipment. When abnormal overpressure occurs, the valve rapidly releases pressure, reducing the risk of damage to lines and equipment and improving field safety.
Cold working pressure ratings cover 6,000 psi (42 MPa) to 20,000 psi. Nominal bore is 2 in. End connections include Fig 1502, Fig 2002, and other union connections, suitable for overpressure protection in high-pressure oilfield operations.
If sour service, low temperature or abrasive service is involved, the selection should not be based on pressure alone. Materials, hardness, seals and traceability must match the specified service condition.
Key points to confirm
For Pressure Relief Valve, we normally recommend confirming the following items before quotation, production or replacement.
- Applicable standard or project requirement: API 6A.
- Working pressure, test pressure, nominal size and bore requirement.
- End connection type, mating equipment, flow direction and installation space.
- Service condition such as standard service, NACE sour service or low-temperature service.
- Required documents such as MTC, pressure test report, NDT report and third-party inspection.
Field use and inspection
Pressure Relief Valve should be checked as part of the complete high-pressure system. Sealing surfaces must be protected, connections should be clean before make-up, and the product should not be forced into alignment by side load, hammering or pulling. If leakage, abnormal operation or pressure-test instability occurs, the model, pressure, medium, photos and test conditions should be recorded for technical review.
Information for quotation
For new projects, please provide the line layout, operating pressure, medium, temperature, connection standard and document requirements. For replacement work, old-part photos, nameplate or body markings, end-connection close-ups and installation position help us confirm the correct Pressure Relief Valve quickly.