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04.08.2025
Boiler Resistance Tests

Boilers, as water heaters and water storage units providing hot water for use, must be hygienic and meet certain standards. It is very important to test the corrosion processes of surfaces in contact with water.

The most important of these tests are the citric acid resistance test, boiling water and steam resistance test.

Citric Acid Resistance Test in Boilers

In boiler tests applied according to European Standards, a 10% citric acid solution is used. The citric acid solution is applied to the enamel surface for fifteen minutes, and the acid resistance is determined based on the deformation it causes on the enamel.

The citric acid test for MIT Boilers is carried out according to ISO 2722 standards. In MIT Boiler enamel tests, the citric acid solution is applied to the surface for a long time, such as twenty minutes. All MIT boilers are produced to the highest level that can be achieved as a result of this test, which is the AA class.

Boiler Boiling Water and Steam Resistance Test

The test piece is subjected to a 48-hour test with boiling water and steam. At the end of this process, the enamel on the test piece decreases slightly. According to European Standards, the highest acceptable amount is 3.5g/m². In MIT Boiler products, this amount is only 2g/m².

Sheet Metal Quality of Boilers

MIT Boilers use low carbon hot rolled sheet suitable for cold forming according to Ereğli TRKK 6222. This sheet is resistant to aging, suitable for welding, has deep drawing properties, and is suitable for enamel coating used by single/double layer or single/double firing. In addition, S355J2 (ST 52-3) sheet is used in immersion galvanized accumulation tanks.