COMPLIANCE INFO_1986-2002 - Laserfiche WebLink

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Amok 0 0 M air from the copper • pipe is going •• the long till line, into the tank, and • the vent. The air should • be blowing •, • the fill pipe, thus, not • the tank. If exhaust from the vent line is negligible, but considerable from the fill pipe, the open area around the pipe leading into the fill can be,plugged up with rags to force air out the vent pipe. The fill line should not be plugged in this manner unless the two conditions mentioned above exist. (That is, tanks equipped with inner fills and vent not exhausting adequately). See drawing #1 - Glass Armor Aerator. The test for flammability is the most important phase of the entire operation. These tests are made with a combustible gas indicator such as the Model 5 Explosive Meter (Mine Safety Appliance Company). Persons responsible for testing must be thoroughly instructed in handling and reading the vapor indications. Bridgeport Chemical Corporation technical personnel will check, approve, and supervise all newly trained personnel. 6-1 Testing Procedure The MSA Model 5 Explosiv�,, Meter must be thoroughly checked as per instruction manual. k. The meter will be checked • •'. the probe in a known • of gasoliri-e vapors such as a gas tank. After the meter reading has been checked, the probe is cleared with fresh air. 3. The tank will be checked by placing the probe in the fill line and taking separate readings at the bottom, middle, and upper portions of the tank, clearing the probe after each reading: Be sure and prevent liquid product from enterin the probe. (Check MSA instruction manual.) The vapors should • tested with the air mover temporarily off at the tank. However, periodic tests should be made at the vent rise, while the air mover is in operation and purging is in rr•• 4. When the meter reading is 40% of the Lower Explosive Limit (LEL) range at the three levels of the tank, a number of readings of the vapor content leaving the tank at the vent riser should be taken. 5. Safe reading of ,20% or less of the Lower Explosive Limit (LEL) range as indicated on the Model 5 Explosive Meter must be obtained at both the tank and vent riser before the tank is considered safe. 6. See Annex B for further information. Page 5 8/80