CO2 Pipe System Renewal at Chan May Port, Vietnam

The work started with replacement steel pipes and the vessel’s damaged CO2 sections. SVC prepared the 3/4-inch t3 steel pipes at the workshop and transferred them to Chan May Port for the onboard renewal. The material reference belongs to this job; a different repair uses its own drawing and specified pipe size.

Our team inspected the damaged sections onboard and identified the renewal areas. Workshop preparation and material transfer were part of the same worklist, so the pipe fitters and welders could proceed when the vessel made the work area available.

The recorded work included NDT checking of the renewed pipe joints where required, surface preparation and painting after the renewal. SVC recorded the replacement areas and finished condition as part of the repair.

This job’s inspection record covers the NDT and finishing described above. For another renewal, choose leak, pressure or blowing tests against the affected system and repair before work starts.

The extent of a CO2 pipe renewal depends on pipe size and wall specification, damaged length, connection points, route, access, system layout, inspection requirements and the vessel’s available working window. Mark the defective sections before quoting quantities.

• Inspect the damaged or corroded run and check pipe size, route, mounting points and connections.
• Mark the removal boundaries; remove the appointed old pipes, clamps, brackets or damaged fittings.
• Fabricate the new sections at the workshop or onboard against the agreed drawing and dimensions.
• Cut, bend, thread and fit the pipe, or prepare flange connections where the design requires them.
• Carry out the commissioned onboard welding with SVC marine welders.
• Install U-bolts, clamps and pipe mounting points; check route and clearances.
• Perform the agreed NDT, leak, pressure or blowing checks as applicable.
• Prepare the surfaces, apply primer and paint, and record the finished work.

The vessel’s system requirements, repair location and Surveyor’s instructions determine the inspection and test plan. Agree the method before starting so the technicians can prepare the joints, access, test boundaries and witnessing points. A pressure test, leak check and blowing-through check answer different questions.

• Visual inspection of the renewed sections and joint fit-up.
• Dye-penetrant testing or other specified NDT where required.
• Leak or pressure testing where applicable to the appointed repair.
• Blowing through CO2 lines where required for the system.
• Checks of U-bolts, clamps, brackets, route and clearances.
• Surface preparation, primer and painting after the required inspections.
• Final photographs, test results, outstanding items and the completion report.

Send a worklist when pipe wall wastage, visible corrosion, leakage, holes, damaged brackets or a suspected blockage is found. Include any class, Surveyor or port-state comment so the repair addresses the specific deficiency.

Annual fire-system inspection and drydock can provide a planned work window. A damaged fire-fighting line may need a different attendance plan during an afloat port call. Identify the current operating restriction, available access and required completion time with the vessel’s responsible officers.

Send the CO2 pipe worklist with the following particulars through SVC’s private repair contact:

• Vessel reference, vessel type and the exact port, terminal or anchorage.
• ETA/ETD and the available inspection and repair window.
• Photographs showing the defect, joints, route, nozzles and mounting points.
• Pipe size and specified wall/material particulars, damaged location and estimated renewal length.
• The relevant piping drawing, connection details and drawing revision, where available.
• Class, Surveyor or fire-safety requirements, including the proposed inspection and testing.
• Access restrictions, isolation arrangements and whether workshop preparation is possible before attendance.