Heat Exchanger :
Heat exchangers equipments designed to transfer heat between two or more fluids – Liquids, gases, or a combination of both of different temperatures.
Heat exchanger are transferring heat temperature from gas-to-gas, liquid-to-gas, or liquid-to-liquid and the process occur through a solid vessel and medium prevent mixing of the fluids or gas.
Based design characteristics and variants of heat exchangers manufactured in industries, Heat exchangers classified as Shell and tube heat exchangers, Double pipe heat exchangers, Plate heat exchangers & Condensers, evaporators and boilers
Heat Exchanger tube, shell design code TEMA and ASME . Based on application, heat exchangers categorized as Flow configuration, Construction method, Heat transfer mechanism and Heat exchangers are used in Process plant industries.
Heat Exchanger inspection, product confirmation and verification ensured by codes, standards and procedures and project plant data sheet
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Heat exchanger in-service :
In-services inspection of heat exchangers activities are performed based by plant procedural requirement and the sequence of operation. Flushing tube from shell side to remove the channel cover and pulling tube bundle for visual examination of bundle, attachment , flange face and shell inside
Based on condition of Heat Exchanger service condition NDT method – Eddy current test, Boroscopy test on tube and LPI / MPI test on weld joint on channel cover, UT thickness and Hardness check on channel cover for verification prior to hydro-static test of shell side and boxing up for on-stream of plant operation.