Blinding, hot work and the permit that should wait for the isolation.
Terminal work is line isolation: blinds, double block and bleed, and proving the blind is in before the permit issues. A nozzle weld on a storage tank is a hot-work permit, often a confined-space permit, and a lockout on the product lines, the mixer and the vapour system.
Contractors do most of it, on a permit-to-work system the terminal owns. The lockout and the permit have to be one record with one sequence: isolate, verify, then permit.
API 2015 and 2016, NFPA 51B and 1910.252 sit beside 1910.147.
The blind list says installed. Nobody walked it. The permit issued; the line was live.
Product lines blinded; the vapour recovery line to the roof was still connected.
The contractor's own lockout procedure is used on the terminal's equipment. The two do not match.
Real isolation-point structure, illustrative tags, equipment that does not exist. Free to read and download. An example to learn from — not a document to adopt.
Weld repair to the 6in outlet nozzle on TK-401. NFPA 51B hot work. Fire watch 30 minutes after work stops.
- 10 isolation points
- 1 must stay energised
Also applies: 29 CFR 1910.252 and NFPA 51B · 29 CFR 1910.146
Read the exampleA procedure can require the hot-work permit; the isolation must be verified before it issues, and the work order cannot close while it is open.
Each blind is an apply-and-verify isolation point with its own attestation, not a line on a list.
Contractors execute the terminal's procedure as users of the site, on the terminal's record. Unlimited.
Plans are per site, per year, unlimited users — see pricing.