Many people do not know the service life of a gas hot water boiler is generally 10-15 years, but in such a long operation time, which boiler parts how to do?During the period will certainly need to replace some parts, because they will have wear and tear, damage and so on, when these damage to a certain extent, the gas heating boiler will be scrapped.However, during the application, most parts only need to be replaced, but how do you know if they need to be replaced?The following is to say that the state of the heating surface as a standard of judgment, which cases need to be replaced.
First of all, you can measure the change in the pipeline inside the gas heating boiler. If it is a carbon steel pipe, once its expansion is more than 3.5%, it should be replaced;And alloy steel pipe replacement standards should be expanded thicker than 2.5%, more stringent.
Secondly, for the high temperature superheater in the gas heating boiler, if the surface oxide scale has exceeded 0.6-0.7mm, and there is a deep grain boundary oxidation crack, the crack depth is more than 3-5 grain degrees, it will also be regarded as invalid.
When the surface of the gas hot water boiler is found to have obvious cracks or other defects, we should pay more attention to them. If the cracks or defects are beyond repair, then we can only replace the whole equipment.For the gas heating boiler pipe and pipe wall thickness check should be carried out in accordance with the provisions of the relevant standards, to ensure that the accurate detection value.
About the economizer tube in the gas hot water boiler, if its wear has reached 30% of the wall thickness, it is necessary to replace.There are similar superheaters, reheaters, water-cooled wall tubes, etc., wear to reach 25 percent of the wall thickness will be replaced.
Timely replacement of damaged parts in the gas hot water boiler, as long as the purpose is not to affect the heating effect of the whole boiler because of them, to ensure that it can always maintain a good working state.