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  • Users: Guibar
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  1. Guibar

    TLE - Transfer Line Heat Exchanger corrosion

    Hi everyone. Hope you are all ok. I have been trying to find someone who had experience corrosion in the TLE - Transfer Line Heat exchanger in pyrolisys furnace, in the water side. I have attached pictures to show. We have been facing it for several years anda have not been able to solve it...
  2. Guibar

    Tank dike

    Hello everyone, Does anybody know if every tank must have dike? any standard talking about that? Regards
  3. Guibar

    Lap-welded Patch Plates on Repair of Fixed Roofs

    Hi everyone. Is there any guide or recommendation about weld patch plates as repair of fixed roofs? I could not find any indication in API 653. Regards
  4. Guibar

    Wedge plug valve cracks repair

    Hi everyone. I would like to know if there is any code, standard or bibliography that can help to evaluate the integrity of the body of valves. We are performing NDT in the body of many valves and have found a lot of indications, small cracks using MP test. I don't know if tehre is any...
  5. Guibar

    Pipe support inspection

    Hello everyone. We have been performed inspection in piping supports by lifting then to inspect and see the integrity of pipe and support. However, we always lift the pipe at maximum 100mm, we never checked if this lift could cause any issue in the pipe system. I would like to know how I can...
  6. Guibar

    Criteria for use of PSV / TSV???

    Hello all, I am looking for any guide or standard that defines when do we need to use a PSV or TSV in pipelines or even in short distance pipes. In all HAZOP I participate, people always ask if should or should not have a safety valve in a pipe (any pipe). The answer I always hear is " it is a...
  7. Guibar

    Limit temperature ASTM a 213 T12

    Hello Eveone. I am looking for references about the behaviour of ASTM A 213 T12. Does anybody have a Bibliography where I can Find the maximum temperatures for this material, without worring with creep? Regards.
  8. Guibar

    Tank shell plate replacement

    Hello everyone. I will have to replace 3 entire shell plates of our naphta tank. They are side by side in the third level out of six. Where can I find information how I have to procede, the correct sequence of each step. Appreciate your comments/thoughts on the above.
  9. Guibar

    Wear resistant material

    Hi everyone, We are looking for materials resistant to ash flow. We burn coal in our steam boilers, but the coal in south Brazil is not the best thing, in fact, is one of worst coal in the world. Usually we have 40% of ash. We are facing severe wear of some radial seals in our pre heater...
  10. Guibar

    Heat exchanger retubing with thicker tube

    Hi everyone. We are going to retube a Heat exchanger with a thicker tube (2,7 mm - BWG 14) than original (2,11 mm - BWG 12). The difference in weight is something around 1 ton. The exchanger weighs 11 ton, and is gonna weigh 12 ton. The exchanger is a floating head bundle. My question, apart...
  11. Guibar

    Chemical Cleaning of Naval Brass

    Hi everyone. I received a proposal for chemical cleaning of a heat exchanger where their tubes are made of naval brass: Copper ....... 59.5 to 63.5% Tin .......... 0.5 to 1.5% Zinc ......... remainder They specify Sulfamic acid to use as a main removal agent. I don't know if there is any...
  12. Guibar

    Problems with Online PSV test

    Hi everyone. We are facing a strange problem in our plant. We have started to calibrate ours PSV online, but since we started, we have found the same problem. We have always found the set above the right open set. We have checked the equipment in our workshop, testing first in the workshop and...
  13. Guibar

    Crevice corrosion

    Hi there, I am quite new in here and I am searching for a material or something to avoid contact between a tank and a skid. In the attachment you can see how the equipment is. We have a tank assembled over a skid, metal to metal, and we have been facing crevice corrosion over the past few years...
  14. Guibar

    NIckel 200

    Hi, Does anyone know where I can find curves of the behavior of Nickel 200, where shows temperature versus caustic soda concentration? Thanks
  15. Guibar

    Material for a coil (serpentine) to heat caustic soda.

    Hi. It is the first time I am writing a question. I live in South Brazil and I am currently working on a petrochemical Plant as a Maintenance Engineer. We are having serious problems with a storage tank for caustic soda. In the winter times, temperatures usually drop below zero. So, in the...

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