Steam boiler quality appraisal

Steam boiler is a kind of equipment that heats water and converts it into steam. It is a special equipment. Its design, production, delivery, and installation must be inspected by the national technical supervision department. Users need to obtain a boiler usage certificate to operate the boiler. Steam boilers are widely used in industry, agriculture, construction and transportation. The working principle of
is that the fuel is burned in the burner to produce high-temperature and high-pressure gas, and the water is heated through the water-cooling wall to generate steam. After a series of heating, reheating, separation and other processes, the high-temperature and high-pressure steam is output for various purposes.
In steam boiler quality appraisal cases, Zhongke Testing can provide steam boiler quality appraisal services.

1, classified by working fluid: it can be divided into natural circulation, forced circulation, direct current, etc.
2, classified according to flue gas flow: water tube boiler, fire tube boiler, water tube and fire tube boiler.
3, classified by installation method: quick installation boiler, assembled boiler, bulk boiler.
4, classified according to drum placement: vertical boilers and horizontal boilers.
5, classified by use: household boilers, industrial boilers, power plant boilers, vehicle and marine boilers.
6. Classified by medium: steam boiler, hot water boiler.
7, classified by water cycle: natural circulation, forced circulation, once-through boiler, combined cycle.
8, classified by pressure: normal pressure boiler, low pressure boiler, medium pressure boiler, high pressure boiler, ultra-high pressure boiler.
9, classified by combustion method: internal combustion boilers and external combustion boilers.
10. Classified by fuel: coal-fired boilers, oil-fired boilers, gas-fired boilers, pulverized coal boilers, waste heat boilers, electric boilers, biomass boilers.
011, classified according to the number of drums: single-cylinder boilers, double-cylinder boilers.
112. Classification according to manufacturing technology level: According to pot specifications, it can be divided into four levels: A, B, C, and D. Common Class A steam boilers are divided into low-pressure boilers, medium-pressure boilers, and high-pressure boilers. Class D boilers are generally exempt from supervisory inspection.
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GB/T 1921-2004 Industrial steam boiler parameter series
GB/T 29052-2012 Industrial steam boiler water saving and consumption reduction technical guidelines

The plaintiff installed a steam boiler it purchased from the defendant in a hotel. Later, it was discovered that the boiler was leaking and could not be used. The plaintiff immediately notified the defendant to send someone to deal with it, but they refused. Therefore, the plaintiff requested the court to order the defendant to compensate the plaintiff for economic losses.
was entrusted by the court to conduct an appraisal and analysis on "whether there are quality problems" in the steam boiler involved.
appraisal analysis results: The
appraisal analysis expert group discussed the relevant information and on-site investigation of the steam boiler involved and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
1, involved The design of the steam boiler in the case did not meet the requirements of Article 34, Paragraph 1 and Article 41 of the "Steam Boiler Safety Technical Supervision Regulations";
2, the quality of the tube hole opening of the upper tube plate of the steam boiler involved in the case, the welding quality of the water pipe and the upper tube plate, and the manufacturing quality of the outer cylinder did not comply with the design documents.