Heat Exchanger Temporary Online Leak Repair Procedures

Figure 1000-5 can be used by operations, engineering and maintenance to determine the types of repairs needed, and also used as a checklist to verify all proper precautions have been taken and all necessary reviews and approvals made. This form was developed at the Richmond Refinery.

Leak Sealing Contractors
Normally, special leak sealing contractors provide personnel who are trained and qualified with regard to the equipment, material, and techniques commonly used for online leak sealing. Sealing compounds must be resistant to the leaking material and suitable for operating pressure and temperature.

Clamps, boxes, and other enclosures used for leak sealing are normally fabricated and installed by the leak sealing contractor.

Safety Considerations
• The contractor must understand all local safety regulations applicable to the work.
• The contractor must understand the nature of the leakage and why it is occurring in order to use a safe procedure.
• All safety precautions and protective clothing required should be listed on the Leak Sealing Checklist and reviewed with the contractor.
• A plant Safety Operator must be present during the execution of leak sealing work on plant equipment.
• Sealant injections should not be made into any pressure relief valve or bursting disc if the sealant could obstruct their free and full discharge requirements.
• If a clamp or enclosure was installed prior to 1984, the sealant compound may contain asbestos. Normal asbestos procedures should be used when removing these enclosures.

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