the quality problems of boiler steel tubes

The quality problems of boiler tubes are mainly in cracks, shrinkage, peeling, pit, layered and slag etc. Boiler steel tubes defects and injuries may exist in the same process of smelting and rolling. So the defects in the surface of boiler steel tubes and outer surface are more than the inner surface. About 70% of these defects are from the raw material called billets which is in blowing insufficient residual slag material and shrinkage etc. There may be rolled steel transverse cracks, laminated, folded, heavy leather and other defects. Longitudinal crack is caused by rolling strain. If boiler piping, in the emergence of defects or injuries, is considered the raw material appearing discontinuous density within the material is damaged. It maybe leaks in the hydraulic pressure test. At running time, pressure element is made for boiler tubes due to leak or burst. In order to guarantee the quality of boiler steel tubes, the standards of boiler tubes must be cleared, the process performance also should be guaranteed as well as steel hydraulic test.

The hydrostatic test purposes: the one is the process of hydraulic test; the purpose is to test the material or components for leaks, the sealing properties of materials; the other is the verification of the hydrostatic test; the purpose is to strength test material if adequate. The hydrostatic test, boiler piping is part of the process of trail, is the material density test, if the test material is dense and continuous; It is not the strength of experimental verification. While seamless steel components are thin and long, the diameter is very small, even for thin walled tubules can withstand a lot of pressure.

AGICO as professional boiler tube suppliers, we provide high quality boiler steel tubes for our customers as well as best after-service. Besides, we also export various kinds of seamless steel pipes, welding pipes, octg pipe and a variety of steel pipe fitting for different countries and regions.