If the plate heat exchanger has a long working time, then it is necessary to carry out quality inspection, so that some problems can be handled in a targeted manner, and it will not be messed up when something goes wrong. What is the quality inspection method for plate heat exchangers?The quality inspection of plate heat exchangers includes maintenance during the manufacturing process of the equipment, including maintenance of raw materials, maintenance between processes and pressure tests:
(1) Inspection of the dimensions and geometrical dimensions of raw materials and equipment parts;
(2) Chemical composition analysis of raw materials and welds, mechanical function analysis test, metallographic organization maintenance, collectively referred to as damage test;
(3) Inspection and repair of raw materials and weld internal defects, the inspection method is non-destructive testing, which includes: radiation detection, ultrasonic inspection, magnetic particle detection, osmosis detection.
(4) Equipment pressure test, including: hydraulic test, medium test, airtight test, etc. Plate heat exchangers are generally subjected to a hydrostatic test, but for structural or support reasons, the gas pressure test may be used when the liquid cannot be filled or the test liquid is not allowed to be used.