Reduction furnace quality appraisal

reduction furnace is a device that reduces metal oxides into metals at high temperatures. It can also reduce metal ions into metals. The principle is to use reducing agents to reduce metal oxides or metal ions in oxides. For example, commonly used reducing agents include carbon, hydrogen, gas, etc.
reduction furnace has a wide range of uses and is mainly used in metallurgy, chemistry, materials and other fields. For example, in the metallurgical industry, reduction furnaces can be used for the smelting and extraction of metals, such as iron, copper, zinc and other metals; in the chemical industry, reduction furnaces can be used for the synthesis of chemical substances, such as hydrogen, methane, etc.; in materials science, reduction furnaces can reduce oxygen ions in materials into metals to prepare new materials.
Zhongke Testing and Appraisal Institute can provide quality appraisal services for reduction furnace equipment and make accurate appraisals in terms of product design analysis, load analysis and product quality analysis.

NB/T 47015-2011 Pressure vessel welding specifications
NB/T47013.3-2015 Non-destructive testing of pressure equipment Part 3: Ultrasonic testing
YS/T 983-2014 Determination method for exhaust gas components of polycrystalline silicon reduction furnaces and hydrogenation furnaces
YS/T 878-2013 Continuous belt reduction furnace for sintering

A machinery company signed a Contract with a technology company, agreeing that the technology company would undertake a set of reduction furnace equipment. After receiving the goods, a machinery company believed that the reduction furnace equipment involved in the case had design defects or construction quality, and appealed to the court.
Our company was entrusted by the court to undertake the quality analysis of the "reduction furnace equipment" involved in this case.
identification analysis results: The
quality analysis expert group discussed and comprehensively technical analyzed the relevant information, on-site investigation and inspection conditions, and inspection and testing data of the "reduction furnace equipment" involved in the case, and made the following quality analysis opinions: There are design flaws in the chassis of the reduction furnace involved in the
case. The fillet welds of the electrode seats on the chassis of the reduction furnace involved in the case did not adopt a penetration welding structure. Only a partially welded structure was designed, which did not comply with the "NB/T 47015-2011 Pressure Vessel Welding Specification". The quality inspection of the fillet welds of the electrode seats involved in the
case did not meet the requirements of the "Joint Welding Process Card". It cannot be ruled out that during the welding inspection, "PT testing" was not performed on the fillet welds of the electrode seats of the reduction furnace chassis involved in the case one by one according to "Welding Process Procedure - 5 Welds for PT Testing" in the "Joint Welding Process Card".
conducted non-destructive testing on the fillet welds of the chassis of the reduction furnace involved in the case in accordance with "NB/T47013.3-2015 Non-destructive testing of pressure equipment Part 3: Ultrasonic testing". The fillet welds of the chassis of the reduction furnace involved in the case had welding defects.