3 . NONSPARKING SHOES 



All members of the spray packaging team or other personnel engaged in the packaging opera- 

 tion within the hazardous area shall wear rubber or canvas shoes in order to avoid the hazard of 

 cs from shoe nails. 





4. SPRAY PACKAGING IN CONFINED QUARTERS 



Confined quarters shall be thoroughly ventilated during spraying operations so that the 

 concentration of solvent vapors never becomes great enough to produce a health or explosion 

 hazard. All mixing operations shall be accomplished in open air. 



5. GROUNDING OF SPRAY GUNS 



The guns used in spray packaging shall be grounded to the steel deck or other permanent steel 

 part of the ship's structure at all times during the spray packaging operation. This may be 

 accomplished by the use of a stranded copper wire conductor wound around the spray hose 

 from the gun to the pressure feed tank. One end of the conductor shall be connected to the 

 spray gun and the other end shall be grounded to the pressure feed tank. The pressure feed 

 tank shall remain in contact with any metal structure of the ship at all times during the spray- 

 ing operation. The spray gun shall be used with bare hands, thereby grounding the body of 

 the operator during the packaging procedure. 



6. PRECAUTIONS AGAINST NONGROUNDED METAL PARTS ON SPRAY PACKAGES 



OR EQUIPMENT BEING PACKAGED 

 Particular precautions shall be observed to prevent the directing of the sprayed plastics or 

 ventilating air stream against nongrounded metal objects. Parts such as steel contour rings 

 mounted on wood decks, metal structures built into the plastic wall of the package, or any other 

 isolated metal part of the object being packaged should be grounded prior to any packaging. 



These regulations, insofar as they apply to steel decks and problems which would 

 be met by the Navy, are not applicable for use in the tobacco industry. However, 

 certain points should be stressed in addition to those previously mentioned in this 

 publication. Paragraph 2 of the Navy regulations applies with respect to electric 

 circuits in tobacco warehouses. Grounded conduit could cause an explosion when 

 spraying is in progress; thus it is a requirement that electricity be cut oft wherever 

 this condition exists. 



Paragraph 4 is particularly pertinent, and it should be stressed that all mixing 

 operations shall be accomplished in open air. In tobacco-warehouse work it is 

 not considered necessary to stress the use of rubber-soled shoes or the grounding 

 of spray guns or other equipment. 



o 



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