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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.
A28) cm diameter pipe carries oil of sp. gr. 0.9 at a velocity of 3 m/s . At another section diameter is 20 cm. find the velocity at this section and also mass rate of flow of oil.
Diagram of Tandem Drive
Q. Analog Control System for steam generator ? The analog (modulating) control of the Steam Generators will be performed using a Process Control System (by Buyer). Detailed fun
Applications of capp
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Construct a retrograde Vernier scale: During construct a retrograde Vernier to a scale of 1/5, signify inches and 10 th , and 30 inches and long sufficient to read to mark dis
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Production management: In this Secetion, you have studied the introduction of production management. Functional units in an organization, features of production management and
W orking stress and Factor for Safety Working Stress: Working stress is safe stress taken within elastic range of material. For the brittle materials, it is taken equal to
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