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Q. What is Forced Draft Fan?
Fan shall comply with API 673 as supplemented by the following: (para. references are to API 673).
Where the intake air is unfiltered, the Vendor shall provide a fan cleaning facility using compressed air at 120 psig (828 kPag). Cleaning system shall function with fan in operation without adverse affects to fan or Steam Generator performance. System shall be manually activated.
Steam Generator Vendor shall be responsible for demonstrating that loads imposed on the fan from ducting under all operating scenarios are acceptable to fan Vendor.
Riveted fan wheels are not permitted
Torsional response studies are not required
Fan and motor balancing shall be done without the coupling half in place. A half key of equal length to that used to secure coupling half shall be used during balancing.
A spot faced 1 inch diameter area shall be provided in three planes at each bearing location (as permitted by access) for mounting magnetic vibration probes.
Fan shall meet the following requirements at its rated point:
Fans shall be direct driven by constant speed electric motors.
CONDUCTION OF ELECTRICITY IN GASES Electricity can pass through different media. In the case of gases, the atoms or molecules are not packed and they are free to move. In fact
Short Circuiting Transfer The short circuiting transfer occurs when the welding current and the arc voltage is low. Metal is transferred from the electrode to the work only wh
Q. Requirements for vessels with thickness? The following additional requirements are applicable, as specified, to Carbon Steel and Low Alloy steel pressure vessels with main
Effect of parameters in flash butt welding Flashing Feed Rate : If excessive, there is a probability of the parts freezing together without welding. If this is insuffic
Figure shows a Warren girder consisting of seven members each of 3 m length freely supported at its end points. The girder is loaded at B and C as given. Determine the forces in al
Thermodynamic process - Thermodynamics: Thermodynamic system undergoes changes because of the energy and mass interactions. Thermodynamic state of system changes because of th
Q. Scope of corrosion assessment design? The purpose of this guideline is to describe the common corrosion damaging modes and mitigation methods and provides recommended materi
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SHIELDING GASES Shielding gas is directed by the torch to the arc and weld pool to protect the electrode and the molten weld metal from atmospheric contamination. Argon
Find out the centre of gravity of a wire: Find out the C. G. of a wire of uniform cross-section bent into shape of a semicircle as illustrated in Figure. Solution
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