1. References : PartA Ch.2 Sec.2 [5.6] PartA Ch.3 Sec.6 TNS 05 Boiler surveys

2. 2 ► External surveys conducted annually with ASH & ASM In operation - under steam ► Periodical internal & external survey conducted twice in 5 years, intervals should not exceed 36 months Shut down & opened up Boiler mountings dismantled for inspection ► Review of log book Review boiler water analysis results Review feed water analysis results Ascertain water consumption Boiler survey

3. 3 Boiler surveys ► Visual examination, checking Insulation Foundations and holding down bolts Inspection of boiler mountings Inspection & test of gauge-glasses, local & remote Inspection of the safety valves & the hand easing gear Inspection of the feed and steam lines ► Testing and inspection under steam High & low level water alarms Low level shut down Steam pressure alarm ► Inspection and testing of the boiler burning system: Fuel lines & filters Flame failure, alarm & shut down No ignition, alarm & shut down Annual survey

4. 4 Boiler surveys ► Scope of Internal surveys Review of log book Internal survey of the gas side Internal survey of the water side Internal Examination

5. 5 Boiler surveys ► Internal survey of the gas side Furnace & combustion chamber Brickwork Smoke and stay tubes Tube plate ► Internal survey of the water side Boiler drum plating Tubes Furnace and combustion chamber Internal fittings & feed pipe Manhole openings and doors Mud hole openings and doors Internal Examination

6. 6 Boiler surveys ► Particular attention to: Safety valves and verification of setting Gauge-glasses & remote indicators Main stop valve Feed check valves Scum & blow down valves & pipe line Steam, feed and fuel lines Inspection of boiler mountings

7. 7 Boiler surveys ► Thermal oil heaters are to be internally and externally inspected ► Heater tubes to visually examined, ► The tightness of the installation to be checked ► Thermal oil heater supports and securing arrangements to be examined, ► Accessories and mountings to be examined, ► Forced circulation pumps to be opened ► Fuel supply pipes to be examined Thermal Oil Heaters

8. 8 Boiler surveys ► Following safety devices to be examined: Thermal fluid temperature safety devices Thermal fluid flow meter, Device for low thermal fluid level in expension tank, Other safety systems If repairs or renewal of the components exposed to pressure, are performed, a pressure test to be carried out 1,5 times the working pressure Thermal Oil Heaters

9. 9 Boiler surveys UPON COMPLETION OF THE SURVEYS, THE BOILERS AND THERMAL OIL HEATERS TO BE EXAMINED UNDER WORKING CONDITION WITH PARTICULAR ATTENTION TO SAFETY DEVICES AND CONTROLS OF THE PLANT. Boilers & Thermal Oil Heaters