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Recent content by Mohsen_81

  1. Mohsen_81

    An international standard for equipment/piping RAL number

    Hi all, I am looking for an international standard that suggests finishing coat colors (RAL numbers) for various equipment/piping in an oil and gas site. Is there any standard or is it the client spec only? Kind regards,
  2. Mohsen_81

    Tube material in air-cooled heat exchanger

    Hi Gents, Can you introduce a reference to specify the material for tubes in aircoolers? In specific, what could be the proper material for tubes in an air cooler as a steam condenser (steam inlet and condensate outlet)? Thanks
  3. Mohsen_81

    Heat exchanger Design

    Hello All, In the basic phase of a project, thermal and sizing design of shell and tube heat exchangers shall be done or the responsibility can be given to the vendo?
  4. Mohsen_81

    Hi Gents, What could be the reas

    Hi Gents, What could be the reason and solution for the corrosion in the below photo? The wall of electric equipment, nameplate, and lock all are 316L (material certificates approved valid for 1.4401/1.4404) and the weld filler is 316Lsi(1.4430). The equipment is just received on-site and not...
  5. Mohsen_81

    Alloy for Pyrolysis Reactor

    @EdStainless Thanks for your reply. In the second line, you mentioned moisture and oxygen control. What is the problem with moisture at this high temperature? And what should be controlled regarding oxygen? It is not also possible to prevent deposit formation. We remove that by decocking. And...
  6. Mohsen_81

    Alloy for Pyrolysis Reactor

    Hi all, In Waste Plastic Pyrolysis, we faced severe corrosion problems in our Pyrolysis Reactor. Operating condition: -Feed: Mix of waste plastic -Temperaure: up to max 850°C -5hours Pyrolysis, 2-3 hours regeneration (combusion+deckocking) -Time by time cool down to room temperature for...
  7. Mohsen_81

    Material selection for Melt Plastic contaminated with Chloride and Bromide

    Hello All, For one of our projects, we need to select proper material for a pipe containing melt plastic contaminated with Bromide and Chloride. Following is the operating condition: Design pressure: 50 bar Design Temperature: 420 °C The contamination of bromide and chloride is not clear yet...
  8. Mohsen_81

    Block valve for Melt Plastic

    Hello all, For a pipe between Reactor and Extruder, we need to select a block valve. This valve blocks the line for cleaning. Do you have any idea which kind of block valve best suits? Please share the manufacturer if you have experience working with them. Design Temperature: 420°C Design...
  9. Mohsen_81

    Weld on leg support

    Thank you all for your replies. @r6155, that was our first suggestion to the client, but due to some reasons, they decided to proceed like this. Since we are at the latest stages of manufacturing, it is not possible to change it. @MJCronin, Reactor with mixer installed at the top, total height...
  10. Mohsen_81

    Weld on leg support

    Hello all, To install a replacement vertical vessel on existing anchor bolts, vendor suggested that legs be split into two parts. The lower part will be delivered to the site sooner to be installed and then later the reactor will be welded to it. The suggested welding method is as below...
  11. Mohsen_81

    API 650, suitable design calculation software?

    Hi all, for one of our projects, we need to perform detailed engineering for the Tank API650 design. What is your suggested software for the calculations? Is there any excel sheet for the calculations?
  12. Mohsen_81

    Old Material certificate for Globe Valve, is it acceptable?

    @kingnero What do you mean. At the moment no.
  13. Mohsen_81

    Old Material certificate for Globe Valve, is it acceptable?

    @MintJulep Cute reply. From your experience, when we do not accept an old certificate? I mean when should the project requirement request for a new certificate?
  14. Mohsen_81

    Old Material certificate for Globe Valve, is it acceptable?

    @jmec87 thank you
  15. Mohsen_81

    Ferrite testing on the welds

    Hello all, Bidder stated in the proposal that Ferrite testing will be carried out only on the welds of duplex spools. Why not for the other spools including SS316 and 304L?
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