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  1. mjellali

    Steam turbine speed measuring system

    Hi all, Can someone clearly explain how speed gear teeth number is considered when to install speed measuring system on a steam turbine. What means "frequency resolution" when to talk about sensor specifications? And what is the relationship that should exist between the speed sensor and a...
  2. mjellali

    sulfuric acid heat exchanger- retubing operation

    cmsvessel some reasons we are proceeding this way are: -the period of time it tooks to manufacture a new cooler is almost one year -the new tubes are new provisions of us -the whole first shell parts are to be reused -the old tubesheets are not to be reused but other machined new ones are to...
  3. mjellali

    sulfuric acid heat exchanger- retubing operation

    hi Edstainless, we do not change any construction material, although we only have purchased a new amount of tubes exactly as the old ones wich are of UNS A 249 grade.
  4. mjellali

    sulfuric acid heat exchanger- retubing operation

    hi members, currently we perform the retubing operation of one of the sulfuric acid coolers (fluid circulation pattern: CO-CURRENT, brend: CHEMETICS, schell side: SULFURIC ACID 107°C/77°C, pressure drop: 1.04 KG/CM3, material grade: 304L, tube side: SEA WATER 31°C/41°C, pressure drop: 0.63...

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