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Construction - Restore

Aug 01, 2023

Restoration

 

The DOR (Division of Responsibility) varies on who is responsible for restoring test packages after testing has been completed.  The testing team normally removes, testing blinds, testing equipment, hoses, etc., and the constructin team re-installs slip rings, valves, instumentation, check valve intenals, etc. Many times the testing team may help with restoration as project schedules and craft levels dictate. If cleanliness issues are prevalent, cleaning BEFORE pneumatic testing is required.  Don’t complete a pneumatic test onlly to find the pipe might need to be cut to remove debris or objects fuond post test via borescope inspection.  The best pratice would be to scope/clean/remove before testing.  Cleaning  before or after hydrostatic testing can be accomplished before or after testing depending on what and where debris and objects are found inside the test package.  As a note on cleaning test packages, NPS of the test package along with the test package configuration dicates the means and methods for cleaning.  Back blowing and cleaning downhill is required.

Post Pneumatic Testing: One of the major benfits to pneumatic testing is drying is not required after the test has been completed.  Once the pneumatic test has been successfully completed, restoration can take place immediately.  As test pneumatcally tested packages often have fluid codes that water would adversally effect, or are not built with supports to hold water weight, keeping the package clean, dry, and closed after testing blind removal is critical.  As a note, pneumatically tested packages are not designed with low point drains…once water ingress takes place, water removal is very difficult and expensive in both time and cost.

Post Hydrostatic Testing: Drying must be completed before restoration can begin.  The drying team will need to leave blinds/hoses in place in order to dry the test package to project specifications.  Once drying has been completed/confirmed/documented, testing blinds, hoses, etc. can be removed.  Once testing blinds have been reomved, covering openings is critical.  Check valve internals should be immediately re-installed if removed or gagged open for testing purposes.  Ensure all valves dropped for testing purposes are protected or taken back to the warehouse for storage.  Ensure PSV dropped for testing have openings covered, placed upright, and/or sent back to the warehouse for storage.  If any gaskets pulled from project stock were used for testing, information for re-ordering should be sent to the package engineer/procurement for re-ordering.  Relief valves removed for testing should be sent back to the M&TE )measurement and test equipment) office for storage and recalibration for future tests.  Gaskets and bolts used for testing cannot be used for final bolting during restoration activites.

Commissioning Leave Out Lists:  Ful restoration of test packages may not be necessary if the pre-comissioning/commissioning team has provided a leave out list.  The pre-commissioning team may not want certain valves/rings placed back into certain systems due to blows/flushing/cleaning activities.

 


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