Upon completion of services – what really shall we do for initial hazardous area classification?

Upon completion of services stage 1, the Subcontractor shall submit the report to the Contractor including:

– analysis of legislation and regulatory documentation;

– detailed description of presence of atmospheric explosives and a zone map;

Upon completion of services stage 2, the Subcontractor shall submit the report to the Contractor including:

– the list of ignition sources and classification of equipment to be used in the corresponding explosion-hazardous areas.

Upon completion of services stage 3, the Subcontractor shall submit the report “EX-explosive media. Assessment of risks and explosion protection” to the Contractor including:

– Agreed information from reports of the first two stages, the list of corrective measures and analysis of consequences of possible explosions.

– Calculation models and files for calculation of zones (if available);

– Calculation models and files for calculation of ignition sources (if available);

– Calculation models and files for calculation of risks (if available).

Note: Calculation models and input data files (with description) in editable files used for calculations using the corresponding software shall be attached to stage 3 report as a part of deliverables.

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Above specification we have received from our client for initial hazardous area classification.

What is your opinion about?

All stages still part of initial hazardous area classification, or already more?

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I say: more. For initial hazardous area classification the knowledge of possible ignition sources not required. Here it already goes into design stage.