Document JNRL3DG4v7bGyJL5zg1341ONX

Flammable and Combustible Liquids FlC 34-7 --Typical tank car with parts identified A--Car brake E--Safety valve B--Wheel block F--Dome cover C --Identification number G--Outlet leg valve D--Car seal H--Outlet leg cap J--Dram pan K--Outlet nozzle L--"Flammable" card may be released as soon as the sludge or scale is disturbed A safe rule to follow is that no tank should be considered free from the possibility of dangerous vapors as long as it contains sludge or scale If workmen leave a tank for a period of bme, such as overnight, gas tests should be made the next morning before they are per mitted to continue work Many companies use a written permit form when it is neces sary for men to enter vessels which have con tained flammable liquids or to do "hot work" repairs in them Devices are available for testing for carbon monoxide, benzene, hydrogen sulfide, and tetraethyl lead hazards (This last instrument is available from suppliers of tetraethyl lead ) Loading and Unloading Tank Cars Only trained employees should load or un load tank cars containing flammable liquids These men should understand the danger of possible fire and explosion and of asphyxia- ELEVATION "o------cr HiX F ---------- -----o---- n----------o----GROUND ROD WIRE TO BE FASTENEO TO RAILS a GROUND ' BOND FlC 34-8 -- A tank car unloading siding showing bonding of rail joints, insulated track joint, derail, and track grounding 1020