Purohit Hemang
Sr. Fire Inspector Grade - I
Asudhir17
Agm Ehs And Project Management

Dear sir,
We, all know that for vessel entry purpose safety permit must be taken as per safety rules & regulation & comply same .
Safety Exhaust Fan is one of the safety permit essential compliance which require for force out of storage vessel fumes through manholes under fresh air circulation .
Is there any specific rules for exhaust fan for vessel entry permit ?
main points are:-
1. Position/ Direction of exhaust Fan.
2. Type of Exhaust Fan .
3. Any Specification of exhaust Fan or Not ?
Any deep details please share it.
Thanks,
Purohit H.V.
Attribution: https://www.citehr.com/member.php?u=...#ixzz299NYS4UQ

From India, Mumbai
Dear Hemang,
The exhaust fan type and specifications are not defined by any law or any IS standard.
The direction can be based on hazard identified.
What you need to consder for selection of an exhaust fan is ..
1. Capacity in CFM
2. Pressure drop
3. The nature of chemical for which the vessel is used.
4. In some cases you need to purge Inert gases to de-contaminate the effects of the chemical.
5. May be you need to have a forced circulation. (put 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

From India, Nasik
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