Pressure Gauge Calibration

Safety valve calibration is the process of testing and adjusting a pressure relief valve to ensure it opens (cracks) at its designated set pressure and reseats properly. This is critical for protecting personnel, equipment, and the environment. A valve that opens too late can lead to over-pressurization and catastrophic failure, while one that opens too early can cause process shutdowns and product loss.

The frequency depends on the service conditions, the type of valve, industry standards, and local regulations. Common intervals are every 12 or 24 months. Valves in corrosive, high-cycle, or critical service may require more frequent testing. Always refer to the original equipment manufacturer’s recommendations and your site’s Process Safety Management (PSM) guidelines.

• Bench Testing: The valve is removed from the process and tested in a dedicated calibration workshop. This is the most accurate method, allows for full inspection and repair, and is often required for recertification.
• In-Situ Testing: The valve is tested while installed on the equipment using specialized, portable test kits. This is faster and avoids process downtime but is typically a verification test and may not allow for adjustments.

A comprehensive service includes:

• Visual inspection for damage or corrosion.
• Testing of set pressure, reseat pressure, and blowdown.
• Adjustment and calibration to the required set point (depend on model).
• Final performance test and certification.

You should receive a detailed Validation Certificate or Test Report. This document is crucial for compliance and audit trails. It typically includes the valve tag number, set pressure, test pressures, test date, the standard used, and the technician’s details.

No, as a calibration service provider, we shall focus on calibration. Customers are advised to get repair service from the supplier or manufacturer.

No. Seals (like lead or wire seals) are administrative controls to indicate the valve hasn’t been tampered with. They do not guarantee the valve’s mechanical functionality. Over time, springs can fatigue, internals can corrode, and seats can erode. Regular functional testing is the only way to ensure it will operate when needed.

Skipping calibration carries significant risks, including:

• Safety Hazards: Potential for equipment rupture, fires, or explosions.
• Regulatory Non-Compliance: Heavy fines and operational shutdowns from authorities like OSHA.
• Production Loss: Unplanned downtime due to equipment failure or forced shutdown during an audit.
• Voided Warranties/Insurance: Insurance claims may be denied if equipment fails without a proper maintenance history.

Look for a provider with:

• Experience & Expertise: Proven track record with your specific valve brands and industry.
• Range of Services: Ability to perform both bench testing and on-site services.
• Quality Documentation: They must provide clear, traceable, and validated certificates.

To get an accurate quote and efficient service, have this information ready:

• Is the Safety Valve with Flange or without Flange (provide flange size too)
• Valve Manufacturer and Model Number.
• Valve Tag/Identification Number.
• Required Set Pressure and Process Media (e.g., steam & gas).
• Size/Orifice Designation (e.g., D, G, J).
• Service History or Previous Test Reports (if available).