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Recent content by zayed78

  1. zayed78

    Fired Crude Heater - Hydrostatic Test

    Hi all, Fired crude heater in service for 30 years . it is a cabin heater with horizontal tube coils. The convection contains twelve (12) original finned carbon steel tubes (A106 Gr B) and four (4) 5Cr-0.5 Mo (A335 P5) alloy tubes. The radiant contains 36 tubes - 5 Cr-0.5 Mo materials...
  2. zayed78

    Mothballing for Non-Piggable Pipe

    Dik, Thank you very much for useful link I read through it but no info about Mothballing for non-Piggable Pipe!!. In my case no way to run pig to install launcher /receiver.
  3. zayed78

    Mothballing for Non-Piggable Pipe

    Gents, I have segments of ~ 50 m Non-Piggable Pipe at well site ass you this section we can to run pig through it for cleaning or chemical treatment. Due to our situation we forced to suspended all our production wells and we applied the massive suspension / Mothballing for main flow line and...
  4. zayed78

    Desalter Operation upset

    Nathan Brink & 0707 Thanks for prompt response, First I will go through Nathan Questions: What is the wash water source (both for the desalter and for the overhead?) We are using service water for desalter no application for the overhead We are using service water (potable water) with below...
  5. zayed78

    Desalter Operation upset

    Hello every one, We have field small refinery to produce diesel ~10000 BFD API =36, BS&W=0.05 and salt= max 4 PTB in our plant already designed one stage deslater my question in such case need to operate this unit I mean mix crude with service water or no need. See below the water and crude...
  6. zayed78

    Desalter Wash Water

    Hello , I have question about Desalter operation. I need to know what is wash water type and specification are recommended for desalter, references and codes such as API, NACE....etc ( see attached file). I know that some refinery companies are using service water or stripped water. I asked...
  7. zayed78

    Dent Repair for Heat Exchanger Tube

    Hello every one, The exchange tube bundle was found with one tube has been damaged; seems to be during handling & transportation; two dents has been observed. NDT LPI "liquid penetrate Inspection” was conducted and showed no indication of cracking. Impact area caused a dent within damaged area...
  8. zayed78

    Chemical Injection Point Orientation

    Thank you Gents, Our Quill is made from 316L SS; the rated Temperature (550 C to 800 C) is above the residue Temperature. Also system pressure is very low. Galvanic corrosion is not applicable (316 pipe and 316L), the question here what/why the failure will be occurred as such system. Zayed
  9. zayed78

    Chemical Injection Point Orientation

    Thanks Dejan IVANOVIC & georgeverghese. We decided to inject the chemical upstream residue pump after re-boiler (Heat exchanger residue /diesel) then after that will goes to 2 stages of exchangers( Crude/ Residue) finally will be stored to tanks. Pipe specification 4 inch SS 316 Residue Tem 650...
  10. zayed78

    Chemical Injection Point Orientation

    Hello every one, We have field diesel distillation unit and we have plan to inject pour point chemical to heavy oil product ( Residual) which goes to crude tanks for storage. I have some concerns about injection point orientation. As good practice we normaly inject the chemical on the top of...
  11. zayed78

    Refinery shut down

    Thanks EmmanuelTop in our case circulation cold crude but as open loop I mean the crude comes from crude tank which is in off/on loading. However, I will recommend to decrease the chemical dosage to minimum rate ( Anti-foulant).
  12. zayed78

    Refinery shut down

    Thanks Very Much georgeverghese. last question I have about the chemicals which are used in normal operation we are using 3 chemicals ( Anti-foulant, filming amine and Neutralizer amine) in the circulating case I have used only Anti-foulant, so I am in the correct a way ?? Note that the...
  13. zayed78

    Refinery shut down

    Appreciate your help Dejan. It is clear now. Actually in the first time we just circulating the crude through the plant but when we don’t have enough crude we are forced to shutdown the plant.
  14. zayed78

    Refinery shut down

    Thanks Dejan, Corrosion concern Sir
  15. zayed78

    Refinery shut down

    Hi, We have small refinery called Topping Plant we only produce Diesel from it in Our Field. I Have one concern about temporary shut down from this plant for only ( 1 to 2 months) not for maintenance only due to security situation. My question here any procedure will be applied when such...
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