Boiler is specialized machinery. It is not like other specialized gear. It is prevalent not only in industries but also in our daily lives, for example, in boilers used for winter heating and hot water in dining rooms and hotels, etc. Our lives are strongly tied to boilers and other similar things.

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The importance of boiler maintenance

Three points are dependent on operation and seven points are dependent on maintenance for the boiler to operate normally. It demonstrates how crucial boiler maintenance is.

The three components of the particular performance are as follows:

1. Have an impact on boiler quality

Whether it is a steam boiler or a hot water boiler, poor maintenance may lower the boiler’s steam or hot water quality, impair its ability to operate, and ultimately degrade the finished product’s quality.

2. Impact energy-saving boiler

When it comes to boilers, we consider both the boiler’s running expenses and product quality. Consider a hot water boiler that must run continuously during the winter to heat the home. A lengthy period of neglect for the boiler will result in the boiler Fuel is wasted needlessly as a result of higher operational expenses.

3. Impact on the security environment

The boiler is a unique piece of machinery. Long-term neglect of maintenance will result in aging and damage to every part of the apparatus. Boiler explosion accidents are likely as a result of this, which will lower the boiler’s safety factor.

Boiler Repair Procedures

Regular Upkeep

To determine the condition of the equipment during routine boiler usage, scheduled and periodic inspections, testing, measurements, and documentation are required. Address issues as soon as they are discovered or create maintenance schedules that will address them as they arise.

Consistent Upkeep

Determine which issues require daily maintenance and which ones, given their significance and use circumstances, may wait until later to be addressed. These issues are then incorporated into the yearly, quarterly, and monthly maintenance plans and carried out to guarantee the equipment operates flawlessly.

Pressure Upkeep

Pressure maintenance is often used on boilers with no more than a week-long outage. The boiler water is kept at a temperature marginally over 100°C using the residual pressure in the boiler to maintain 0.05–0.1 mPa. This keeps the boiler water free of oxygen and helps keep air out of the drum. Use the steam from the nearby boiler to periodically heat the boiler water, or create a small fire in the boiler to maintain the water’s temperature.

Damp Upkeep

In general, wet maintenance is appropriate for boilers with shutdown times less than one month. Once the boiler has been turned off, empty the water from it, clean off any soot and scale, and seal up any manholes, hand holes, valves, etc. After that, fill the boiler to the lowest possible level with softened water. Next, inject the prepared alkaline solution into the boiler using a specialized pump. Trisodium phosphate, sodium hydroxide, or sodium carbonate make up the solution’s makeup. After injecting, open the water supply valve and pour softened water into the boiler until the air valve opens. After that, shut off the water supply and air valves and activate the special pump to stir the water around so that the solution is mixed thoroughly.

Light a low-fire oven often throughout the maintenance time to maintain the heated surface’s outside dry. Frequently turned on the pump to allow the water to circulate and maintain a constant solution concentration. Monitoring is necessary on a regular basis, and supplementation is necessary if the alkalinity falls. In the winter, use anti-freezing precautions.

Arid Upkeep

Dry maintenance should be performed on boilers that have been off for an extended period of time. Drain the pot water, remove the soot and scale, switch off the gas, water supply, and sewage wide, then open the manhole to allow the drum to dry naturally once the boiler has been turned off. Use a low fire to dry the flue, furnace wall, and boiler body if the boiler room is moist. The desiccant (anhydrous calcium oxide or quick lime) should then be placed on the grate with an open tray and hoisted inside the drum using a cotton bag to absorb moisture. In order to stop damp air from getting into the boiler and corroding the heating surface, seal off all manholes and hand holes. In the future, replace the failed desiccant on promptly and check to see if the heating surface has rusted every three to five days.

Maintaining Inflation

Boilers that have been out of commission for an extended period of time are eligible for charging maintenance. In order to prevent the metal from coming into contact with oxygen, nitrogen and ammonia are typically charged from the highest part of the boiler and kept at a pressure of 0.05~0.1MPa to force air to be discharged from the lowest portion of the boiler.

After the soot is removed, the exterior of the heating surface on boilers that are not used for an extended period of time should be sprayed with anti-rust paint; the inside of the heating surface should be scale-free and covered with boiler anti-corrosion paint. Thoroughly clean the boiler’s auxiliary equipment, and drain the lubricating oil from the grate reducer, induced draft fan, and drum. To stop corrosion, rotate all moveable parts once a week. Observe all safety laws while maintaining any electric equipment.


By insisting on the aforementioned boiler maintenance tasks, you may significantly lower the oxygen corrosion in your boiler, increase its lifespan, and guarantee the boiler equipment operates safely and economically. There are numerous ways to maintain a boiler during shutdown; however, the way these methods are implemented depends on a number of factors, including the boiler’s structure, feed water quality, purpose, and duration of shutdown. Use the appropriate maintenance method based on your particular situation.