References : PartA Ch.2 Sec.2 [5.6]

PartA Ch.3 Sec.6

TNS 05

Boiler surveys

2Boiler surveys

► 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

3Boiler 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

4Boiler surveys

►Scope of Internal surveys

Review of log book

Internal survey of the gas side

Internal survey of the water side

Internal Examination

5Boiler 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

6Boiler 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

7Boiler 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

8Boiler 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

9Boiler 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