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  1. azertyuiop

    1"->6" sch10 SS aisi 316 @ 435psi & 480¦F is OK?

    Metengr, I followed your advise, after doing some internet search for myself, which showed that the 4" and 6" where not strong enough (welded pipe 6" nominal working pressure = 80% seamless pipe pressure = max 27 bar, instead of the 40 bar design I asked). The contractor submitted an apology...
  2. azertyuiop

    1"->6" sch10 SS aisi 316 @ 435psi & 480¦F is OK?

    I have received from a piping contractor a quote proposal for a process plant I am project managing. The fluid streaming in the pipes is coconut oil at 250°C or 480°F maximum temperature, oil being put at max. 30bar operational pressure, MAWP being 35bar or 435psi (1bar=14.5psi). piping...
  3. azertyuiop

    PTFE for high performance butterfly valve

    For that pressure and this temperature, 100% PTFE is out of limits, since pure PTFE temperature resistance ends at 200dC, and you operate at 210dC. PTFE expands 10x more than stainless steel when heated at it's max temperature, and as such creep in between spaces and does deform permanently, if...
  4. azertyuiop

    EN 13480 Piping Materials

    SOME ANSWERS BELOW IN CAPITAL LETTERS. I am working in Australia to design a mining processing plant to be built in eastern Europe with piping to EN 13480 and need some guidance as below; 1. What pipe/tube ODs are most commonly used and readily available for this work in Europe? US BASED O.D...
  5. azertyuiop

    coconut oil dielectric value

    Hi, In a new coconut oil hydrogenation plant that I am designing, I see that the instrumentation suppliers are requesting a minimal dielectrical value for the main process liquid to be measured (level gages, etc) , in my case hardened coconut oil. Did a google search for that value, found...
  6. azertyuiop

    Leak test at high pressure

    I have worked at a natural gas compression facility , where we had to also do a leak test on a glycol slug catcher, but to 160 bar instead of yours 120 bar. The volume was not 4000m3 like yours, but we managed to use air mixed with a certain amount of nitrogen to increase the pressure. The...
  7. azertyuiop

    nitrogen piping dimension

    Hi, I have a nitrogen pipe dimensioning quote from a contractor that I want to check upon. figures are : . pressure : 6 bar . flow rate : 200Nm³/h at 0°C (55 liter/ sec) . pipe length around 110 meters. . nitrogen already evaporated into a gas fase . temperature nitrogen in pipe during winter...
  8. azertyuiop

    scale up of reactor

    HI All, I am also busy with a new hydrogenation pilot plant processing refined vegetable oil, with the aim to reduce the iode number by a factor of 10, before further processing downstream. The reactor system is dimensioned, but I am strugling with the hydrogen and nitrogen gas feed to that...
  9. azertyuiop

    scale up of reactor

    HI All, I am also busy with a new hydrogenation pilot plant processing refined vegetable oil, with the aim to reduce the iode number by a factor of 10, before further processing downstream. The reactor system is dimensioned, but I am strugling with the hydrogen and nitrogen gas feed to that...
  10. azertyuiop

    316L wharf pipework corrosion

    I remember a similar situation , were corrosion did start with iron tools falling on the SS pipe during a poorly supervised and uncareful construction phase , leading to numerous carves in the OD pipe SS protection layer by the construction tools , contaminating it with microscopic iron parts...
  11. azertyuiop

    SS304 / SS316 - how to check on them ?

    quadswift , you are right on spot concerning the fact that I am earning what I should earn , except that you are firing at the wrong guy. I am new in this company , and new in the heavily regulated pharma sector , replacing another engineer who got fired for incompetence , dixit his collegues...
  12. azertyuiop

    Consideration of Human Error in Risk Assessment

    wolfram , I started to read the long thread just out of curiosity , but spent a lot of time to read it all , because your problem isn't easily solved. I can't give you any concrete help on this matter , not being into this specific sector , nor doing Hazop's. However , I think you also could...
  13. azertyuiop

    SS304L / SS316L - how to check on them ?

    Dear collegues , I want to check if the contractor is supplying my company an installation with the much more expensive SS316L materials that was demanded , and make sure he doesn't supply us cheaper SS304L materials instead (pharma applications). How to check on this without damaging the...
  14. azertyuiop

    SS304 / SS316 - how to check on them ?

    Dear collegues , I want to check if the contractor is supplying my company an installation with the much more expensive SS316 materials that was demanded , and make sure he doesn't supply us cheaper SS304 materials instead (pharma applications). How to check on this without damaging the...
  15. azertyuiop

    bad water smell removal in a copper boiler

    No , I won't follow your advice. I have bought a few kg of the chloramine powder , given that is is very cheap stuff. I don't want to invest in regulation equipment and other water quality management hardware , too much work for the temporary hazzle , given that the bad smell only occurs during...
  16. azertyuiop

    Chloramine disinfection

    sorry , guys , I want to stay out of the discussion in the future , given that my problem is not related to the posted inquiry on top of the thread. I have taken a sample of my bad smelling cistern water to the local drugstore , asked them how to remove the bad smell , and they answered me that...
  17. azertyuiop

    compressor cooling capacity

    You start by defining your evaporator. The evaporator at his working conditions , will evaporate a choosen liquid refrigerant to a certain low gas pressure , cooling the ambiant atmosphere in contact with the evaporator , during this process. This low gas pressure is then aspired by your...
  18. azertyuiop

    Powder agglomeration via coating

    Is your powder meant for the food sector or doesn't the coating have any particular requirements to fit , besides making the powder thicker ?
  19. azertyuiop

    basic & detail design

    Basic engineering = basic study to allow everyone involved to agree on the exact scope of work to be done to solve the problem involved in the project and put a groos figure on how much it will cost , before going ahead with the detail engineering. Detail engineering = get the thing designed in...
  20. azertyuiop

    bad water smell removal in a copper boiler

    I think the bad smell problem is solved by the mixing of Chloramine in the rain water cisterns. The chloramine worked in the cistern for 24h , being mixed around in each tank by means of a submerged pump. I purged today the main water circuits and cleaned again the water filter , the smell is...

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