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Q. Explain about Postweld Heat Treatment?
Pressure vessels shall be postweld heat treated per applicable sections, in accordance with applicable material specifications or when specified by the User, due to service such as ammonia, caustics, amines, or wet hydrogen sulfide. Alternative Postweld Heat Treatment Requirements For Carbon And Low Alloy Steels, shall not be employed.
PWHT provides reduction of residual stresses, due to forming and welding, and results in softening of heat affected zones. Some steels can be damaged within certain temperature zones below PWHT temperature. A Materials Engineer shall be consulted regarding the need for postweld heat treatment, and dependent on service conditions. The resulting recommendation shall be included on the Data Sheet.
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Q. Safety from Corrosive Chemicals? Safety showers and eyewash stations shall be provided in areas where corrosive chemicals are stored and handled. They should be located so t
#what is porosity in welding is this different from pin hole
what are the parts of wilson hartnell governor with their designation?
System of force
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describe advantages of limitation and effect of cold working?
Engine oil replacement Motorcycle is thoroughly drained by kicking the vehicle several times. Inspect the drain bolt washer and replace if necessary. Tighten the drai
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A String LM long is tied to the ends of a uniform rod that weight 60 N and is 1.6m long. The string passes over a nail so that the rod hangs horizontally. Determine the tension in
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