What are the common materials used in plate heat exchangers - austenitic stainless steel, titanium alloy and Hastelloy alloy

Heat exchanger material quality control is the key to ensure the plate, a sealing gasket, a pressing plate, a middle baffle plate, clamping bolt, flange and take over the main parts such as welding materials and the authenticity and traceability, in order to ensure the quality of products, service life and safety and reliability. In addition, the selection of materials should be economical and reasonable.

Plate heat exchanger main parts of the material should not be lower than the national standard GB16409 "plate heat exchanger" or industry standard JB8701 "cooling plate heat exchanger" provisions. The quality control of materials shall be carried out in various stages, such as purchasing, acceptance, marking, storage, distribution, production and processing, etc..

The material of the plate has an important influence on the performance, service life, working conditions and sheet forming quality of plate heat exchanger. Material quality control mainly includes two aspects:

1, the chemical composition, mechanical properties and other technical requirements should be consistent with the corresponding standards;

2, according to the material characteristics and applicable scope, correct and reasonable selection, which must consider the properties and operating conditions of heat transfer media (including chloride content and pH value size, operating temperature, pressure, space operation or continuous operation), and the processability and corrosion resistance of materials etc.. The main materials used in plate are austenitic stainless steel, titanium and titanium alloy, nickel and nickel alloy and copper and other four kinds of cold-rolled sheet.