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Good video explaining how static is created and why it is worse in winter (video) Read More »
OSHA, as well as NFPA and IFC, permit a “weak roof-to-shell seam” as the means for emergency venting on an OUTSIDE ABOVE GROUND ATMOSPHERIC storage tank for flammable liquids. This method was vey common in the early days, but has since been replaced with engineered fire vents. This video does an excellent job demonstrating how…...
How a “weak roof-to-shell seam” works on an atmospheric storage tank Read More »
Over the past year or so we have come across several situations where facilities have replaced their flammable liquid storage tanks, which some are used as a “waste tank”. These “waste tanks” fall under EPA’s RCRA rule and apparently these tanks have to be “fully inspected” on a set frequency and when tanks sit directly…...
Flammable Liquid Tanks on “Legs” Read More »
In the world of process safety, we have Safe Upper and Lower limits on a lot of common process parameters, such as pressures, levels, temperatures, etc. Flows on the other hand are quite often overlooked as a critical process parameter and when your HHC/EHS is a non-conductive flammable liquid both FLOW and LEVEL must be…...
Controlling flow rates of non-conductive flammable liquids Read More »
A crew was conducting well kill operations on a sweet oil well. A worker was monitoring the return flow to the service rig trough from on top of the rig tank. When the returns became gassier, the return flow was opened to the degasser section of the rig tank and the trough flow was pinched…...
FLASH FIRE on top of “rig tank” (i.e. frac tank) Read More »
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Cheat Sheet for Classifying Flammable Liquids under the new GHS (NC-OSHA) Read More »
Liquified Petroleum Gas (LPG) cylinders are being filled by decanting equipment. These cylinders can be for commercial use (e.g. forklift trucks) or for domestic use (e.g. cook tops, barbecues, and camping). It is critical that all decanting operations are carried out in a suitable and safe manner. What happened? A fire broke out at a…...
Petroleum and Gas Safety Alert 66 – Safe LPG decanting procedures and static electricity Read More »
Have you ever seen several full tanker trailers parked without their mode of transport under them or a railcar with the Class 3 Flammable placard hooked up to the process and being used as a storage tank? Although OSHA’s 1910.106 makes no specific prohibition against this practice, I would like to point out that the…...
“Dropping trailers” of flammable liquids Read More »
Description of Incident: An operator was checking the level in a 500 gallon methanol storage tank: Tank was polyethylene plastic, double wall A worker climbed on top of the tank. Flammable vapour was ignited, when the worker touched the cap on the inner tank, resulting in an explosion and flash fire. The worker received first aid…...
A little background on what this table is telling us: NFPA 77 classifies flammable liquids as Conductive, Semi-Conductive, and Non-Conductive: Conductive Liquids = >10,000 pS/m Semi-Conductive Liquids = >100<10,000 pS/m Non-Conductive Liquids = <100 pS/m In the tables below, 1 conductivity unit (C.U.) = 1 picosiemen per meter (pS/m)… Membership Required You must be a...
Flammable Liquids Conductivity (Updated 1/18/14) Read More »
This video is a bit slanted for a lawsuit, but the video footage does demonstrate the significant impact a simple flame arrestor makes in flammable liquids safety! I need to state that a gas container in and of itself is NOT a hazard, but the fuel inside the gas container is a HAZARD. Although I…...
Do flame arrestors really work? (Video) Read More »
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Are those red plastic gas cans UNSAFE? (video) Read More »
