Section 73ZA(1) in Maharashtra Factories Rules, 1963
(1)In respect of any factory where thermic fluid heater has been installed (hereinafter called "heater") and following provisions shall be complied with-(i)All heaters shall be of such construction that, the coils shall be removable for periodic cleaning, visual inspections and hydraulic test.(ii)Suitable arrangements shall be made for cooling the furnace effectively in case of power failure to the heater.(iii)Before restarting the furnace of heater it shall be effectively purged.(iv)The thermic fluid used for heater shall be circulated in a closed circuit formation with an expansion cum decorator tank. This tank shall be located outside the shed where the heater is installed.(v)Every Oil or Gas fired heater shall be provided with a photo-resistor actuated audio visual alarm to indicate flame failure and automatic burner cut-off.(vi)The stack temperature monitor-cum-controller with audio-visual alarm shall be provided to the heater so as to warn the operator in case the outlet temperature exceeds the specified minimum.(vii)All heaters shall be provided with following devices and the same shall be maintained in efficient working order.(a)level indicator in the expansion tank;(b)temperature indicator of thermic fluid;(c)different pressure switches across the inlet and the outlet line of the heater tubes; and(d)temperature control device for the fuel supply to the burner.(viii)All devices mentioned in clause (vii) above for oil or gas fired heater shall have inter-locking arrangement with burner so that in case of any pre-determined limits being crossed the supply of fuel and air to burner shall automatically be cut-off.(ix)All safety inter-locks when operated shall be indicated or on the control panel of the heater by a suitable audio-visual alarm.(x)Electrical panel for the heater shall be located near the heater but not so close as to be exposed to spilling or leaking oil.(xi)The heater shall be located in a place segregated from other manufacturing activities.(xii)Explosion vent for heater shall be so installed that, the release takes place at safe location.(xiii)The heater coil including the coil connected to it in the users' equipment subjected to pressure shall be tested by competent person once at least in every 12 months. The test pressure shall not be less than twice the operating pressure.(xiv)If repairs are carried out to the heater, coil including coil connected to it in users equipment shall be got examined from competent person before taking it into use.(xv)Maximum temperature of thermic fluid in the heating of heater coil shall not exceed the figure specified by the manufacturer. The thermic fluid used in heater, shall confirm to the specifications prescribed by the manufacturers and shall be tested by competent person for suitability at least once in every three months period. Such test shall include test for acidity, suspended matter, ash contents, viscosity and flash point.(xvi)Cleaning of the internal surface of the heater for removing soot and check up the refactory surface on the inside shall be carried out every month, or as often as required depending upon working conditions. The coils of heater shall be removed and surface of the coil cleaned thoroughly once at least in a period of six months. The burner, nozzles, oil filters and pumps shall be cleaned once a week during the period of use.(xvii)A separate register containing the following information for the heater shall be maintained.(a)weekly checks carried out confirming the effectiveness of the inter-lock;(b)weekly checks confirming that all assessories are in good state of repairs; and(c)information regarding fuel oil temperature, pressure, thermic fluid inlet/outlet pressure and temperature, fuel gas temperature, recorded at four hourly interval.(xviii)The heater when in operation shall always be kept in charge of a trained operator.
