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Home > Engineering > Dry Pre-commissioning valve

Dry Pre-commissioning valve

I. Preparation

Confirm that all necessary documentation is available (ISOs, P&IDs, valve specifications).

Verify that the work area is clear and safe for operations.

Ensure that all personnel are trained and aware of the procedures.

II. Valve Inspection

Check for physical damage or defects on the valve body, seat, and stem.

Inspect gaskets and seals for integrity and proper installation.

Ensure that the valve is in the correct position (open or closed) as per specifications.

Verify that all valve tags and markings are present and legible

Check the actuator (if applicable) for proper operation and secure mounting

Inspect the valve handle or lever for proper operation and secure attachment

Ensure that all fasteners and bolts are tightened to the manufacturer's specifications

Inspect for any signs of corrosion or rust on the valve surfaces

Confirm that the valve is free from any foreign objects or debris

Assess the overall alignment of the valve in the piping system

Check for any leaks around the valve, including the inlet and outlet connections

Verify that the valve operates smoothly without excessive force or binding

Ensure that the valve is correctly oriented in relation to flow direction markings, if applicable

III. Functional Testing

Manually operate the valve to ensure smooth movement and proper seating.

Verify that the actuator (if applicable) functions correctly.

Check for any unusual noises or resistance during operation.

Here are some additional steps that could be included in the III. Functional Testing section of a New Dry Pre-commissioning valve checklist

Confirm that the valve position indicator (if applicable) accurately reflects the valve's position

Test the valve's response time to control signals (if applicable)

Perform a leak test to ensure no air or fluid escapes during operation

Check the alignment of the valve with connected piping and components

Validate that the valve opens and closes fully without obstructions

Monitor valve performance under simulated operating conditions (if feasible)

Document any irregularities or deviations observed during testing

Inspect the valve's sealing surfaces for any signs of wear or damage post-testing

Ensure that any safety interlocks or emergency shut-off features operate as intended

Conduct a final visual inspection of the valve and associated components after functional testing

IV. Drying Procedure

Confirm that the valve and associated piping are dry and free from moisture.

Use nitrogen or dry air to purge any remaining moisture from the valve and pipeline.

Monitor pressure levels during the drying process.

Inspect and verify that all drain points are open and accessible to facilitate moisture removal

Ensure that all safety equipment is in place before commencing the drying process

Establish a flow rate for nitrogen or dry air to optimize the drying time without over-pressuring the system

Utilize moisture indicators or sensors to continuously monitor the moisture levels in the system during the drying process

Maintain a log of pressure and moisture readings at regular intervals throughout the drying process

After purging, allow the system to stabilize for a predetermined amount of time before proceeding to the next steps

Conduct a visual inspection for any signs of moisture or condensation within the valve and piping after the drying procedure

Ensure that all valves and fittings are properly sealed to prevent re-entry of moisture after drying is complete

Document the completion of the drying procedure, including any observations or deviations from the standard process

V. Documentation

Complete all required checklists and inspection reports.

Document any findings or anomalies encountered during the process.

Ensure that all documentation is signed off by responsible personnel.

VI. Final Review

Conduct a final walkthrough of the work area to ensure everything is in order.

Review all documentation with the project lead or supervisor for approval.

Confirm readiness for the next phase of commissioning activities.

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