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  1. Marinel1

    Pilot contact in pug and sockets

    I read a lot about CEE plugs and sockets with pilot contact ( 63A and 125A), but when it concerns rubber flexible cable to built an electric extension I can not find the cable Please check https://www.legrandservices.nl/documize/2012/10/20121015_58061_2.pdf and please help me to find the...
  2. Marinel1

    Guide cables on roof air raising

    Concerning roof air raising, i saw a Method Statment wher they talk about two types of pressure. The pressure that we need to mantain in equilibrium the roof, and a pressure to raise the roof. In that particular case they talk about 140 mmH2O for the fiorst one and 250 mmH2o for the second...
  3. Marinel1

    Guide cables on roof air raising

    See also thread1452-384612 As far I know there are at least two ways to assemble the guide ropes. The most comun is to pass the ropes throught the roof and use the pulleys bellow the roof shells in the periferic zone. Another way is to have the same pulleys on the top of the roof and use just...
  4. Marinel1

    Roof air rising

    In order to avoid or minimize the safety problem, normaly we do the roof air rising with redundant fans and supplied by exteranl generators with also an extra generator in stand-by. Nevertheless, if everything goes wrong, the roof can be goes to the original position slowly as the air escapes...
  5. Marinel1

    Roof air rising

    Good afternoon, As far I remenber, we welded some wire pins on the border of the roof in order to fix the wire mesh. This mesh was like a roll covered by plastic. Is what you have done in your first option Syahar? From your experience what is the avarege distance between the roof and the...
  6. Marinel1

    Roof air rising

    To be proportional to the circunference or diameter is the same because we have just a factor of scale ( PI=3,14. Concerning the number of balancing wires and accordingly thumb rule of Syahar we need to have 20 wires instead of the 16 used ( diam:206´/10=~ 20). I do not know if I am right but 16...
  7. Marinel1

    Roof air rising

    Thanks Syahar! It means that balancing wires is a empiric data accordingly your experience.No maths involved.
  8. Marinel1

    Roof air rising

    Thanks Syahar1975! Your comment confirm my calculations. But what about the balancing wires? How many we must use and type of cables?From I saw in the past and from the pictures it looks that they are around 9 to 11mm diam. which looks to small in order to do the equilibrium of the roof during...
  9. Marinel1

    Roof air rising

    Thanks Fegenbush! In https://ferrysibarani.wordpress.com/2009/10/29/air-raising-process-dome-roof-tank/ you can see also the balancing wires in order to keep the roof in equilibrium. Is there is any rule to calculate how many points around the tank and type of cable to be used?
  10. Marinel1

    Roof air rising

    I don't know if it is so easy as you say. The roof is not flat,is more like a dome, and if we consider the total area of the spherical calotte, then the force up wards is not the area X pressure. Could you please let me know about your previous experience?
  11. Marinel1

    Roof air rising

    I woukld like to know how to calculate the right pressure for roof air rising of a tank. I have been involved in some but only as an observer. I would like to know if someone can help me on this issue.

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