Threaded fittings should be avoided, and flanged connections should be held to a minimum. All pipes should be thoroughly dried before installation by blowing with nitrogen. Thin gauge piping is not recommended for dimethyl sulfate because of possible leakage due to physical damage, line setting, etc. Full face gaskets are normally used. Pumps A submerged pump such as a Tabor can be used for transferring dimethyl sulfate from the storage facilities to the point of application.
Sealless pumps are easier to decontaminate and remove for maintenance than submerged pumps.
Filters A cartridge-type filter may be installed in the process to remove rust or foreign solids. The filter should contain fiberglass or ceramic elements and have a removal capability of 5 microns or less. Filters should be decontaminated before cartridges are changed. See Equipment Repairs Ventalation Process areas where dimethyl sulfate is used should be adequately ventilated. The number of air changes should be no less than six per hour.