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August 4 - August 8, 2014

When SSPC-SP3 (Power Tool Cleaning) is specified, how should one decide when to apply the tool to the entire surface and when to use it just where the coating appears defective or rusting?


Selected Answers

From Chuck Stevens of self on August 22, 2014:
When the specification does not address this issue, the owner should be contacted prior to issuance of a bid to do the work so an honest bid can be submitted.

From AJAYI OLUWADUNSIN of CHEVRON ESCRAVOS TERMINAL on August 13, 2014:
I believe the initial condition assessment of the substrates will clearly identify whether the use of SSPC-SP 3 is justified on the entire surface or on spots where the coating is defective or rusting.

From Karen Fischer of Amstar of Western New York, Inc. on August 4, 2014:
One would have to determine this by carefully reading the specifications prepared by the owner. Each one has his or her own terminology. I've seen specification defining "overcoating" as preparing only rusted areas to bare metal and painting only those areas, or, alternatively, preparing the rusted areas, lightly abrading the remaining areas (as defined) and overcoating the whole area. The specification should be the guiding document in most cases.

From Per Gabrielsson of Free Lance Consultations and Inspections on August 4, 2014:
The specification should always mention whether a full SSPC-SP 3 is required or only on corroded and defective spots. If it is the latter, the spec should also mention feathering of intact coating edges.

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Tagged categories: Power tool cleaning; Surface Preparation


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