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Q. Describe Polythionic Acid Corrosion?
Although it is not typically thought of as high temperature corrosion, polythionic acid stress corrosion cracking occurs in areas where high temperatures are present (e.g. in furnaces and at the flare tip). The presence of polythionic acid is dependent upon formation of a sulphide film that forms when H2S is burned. During shutdown periods this film may react with oxygen and water to form polythionic acids. Polythionic acids may cause SCC in furnace tubes, heat exchangers, thermowells and vessel linings.
Q. Cyclic Service for vessels? The required service for all vessels shall include consideration of cyclic service. Batch operation vessels, for example, quite frequently fall i
Illustrate with working, construction and measurement of brake power by Belt transmission type brake dynamometers? The essential features of a transmission dynamometer are show
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state six typical application of primary cells
Expression for the maximum shearing stress: Obtain expression for the maximum shearing stress and maximum shearing planes. Sol.: The condition for maximum shearing stress i
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can u please explain me d concept of 2nd law of thermodynamics. I am not so sure about it ??
Q. Portable Gas Cylinders - Handling of Hazardous? Portable Gas Cylinders Portable gas cylinders are vulnerable to fire exposure when located in process areas. Depending on l
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