Are There Specific Rules for Safety Exhaust Fans in Vessel Entry Permits? Let's Discuss!

We all know that for vessel entry purposes, a safety permit must be obtained in accordance with safety rules and regulations to comply with the same. A Safety Exhaust Fan is one of the essential safety compliance permits required to force out storage vessel fumes through manholes under fresh air circulation. Are there any specific rules for the exhaust fan for vessel entry permits?

Main Points to Consider

1. Position/Direction of the exhaust fan.
2. Type of exhaust fan.
3. Any specifications for the exhaust fan or not?

Please provide detailed information on the above queries.

Thanks,
Purohit H.V.
Attribution: https://www.citehr.com/member.php?u=...#ixzz299NYS4UQ

The exhaust fan type and specifications are not defined by any law or any IS standard. The direction can be based on the hazard identified. What you need to consider for the selection of an exhaust fan is:

1. Capacity in CFM
2. Pressure drop
3. The nature of the chemical for which the vessel is used.
4. In some cases, you need to purge inert gases to decontaminate the effects of the chemical.
5. You may need to have a forced circulation (add an additional blower to purge air).
6. Usually, the conditions would be given in the MSDS of the chemical being stored.

Hope this clarifies.

Thanks & Regards,
Sudhir