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  • Users: planck121
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  1. planck121

    Pump Support on OH2 centreline mounted pump

    Hello, We are running into some issues with soft feet and alignment of a typical centreline mounted (OH2) type API 610 pump. The piping is not yet connected and its a construction project, the shaft of the pump seems to sit a bit angular leading to issues with alignment and soft feet. However...
  2. planck121

    Turbine Baseplate

    Hello, During our construction/grouting of a single stage turbine and gearbox, the baseplate was incorrectly grouted leading to issues now with acheving alignment of the turbine gear train. There are a few proposals floating around - one would be to regrout the entire baseplate, the other would...
  3. planck121

    Different types of Steel Conversions

    Hello, I am basically trying to locate a handy reference (free or otherwise) that I can purchase to help me convert between european and american steel grades (say for instance S275J2 converts to 1019 CS) and also a handy reference that can help me understand what other best substitues can be...
  4. planck121

    Pump Bearing Bracket Cooling water lines

    Hello, I have come across a recent pump installation (picture attached), where basically there is one port the cooling water piping is connected too however there is a T valve and the outlet lines go to two different headers Cooling water inlet and cooling water outlet. I do not understand how...
  5. planck121

    Overspeed trip testing of steam turbines

    Hello, I have seen various vendor OEM recommendations on performing the plant overspeed trip testing on steam turbines. I recollect reading in a paper where the vendor was recommending using a bypass on the steam line for some reason to do a proper over speed test. I cannot excatly recollect...
  6. planck121

    Amine pump seals

    Hi, I have read and seen in many instances mechanical seals in Amine (rich and lean) applications tend to have failures connected to crystallization of the amine on the atmospheric side of the seal. This is true in cases where a API 52 unpressuried plan is being used and therefore seal vendors...
  7. planck121

    Type 2 test on compressors

    Hi I had a general query on the type 2 testing done as per PTC code 10 for compressors. I recollect reading at some point in research literature about the following and would appreciate further in depth input on the part of anyone having more experience : 1. PTC 10 allows Reynold number...
  8. planck121

    Tempered water ESD trip on recip machines

    Hello I am trying to understand if a reciprocating compressor in hydrogen service should trip when the ESD on the tempered water circuit trips the tempered water pumps. I would reason that the compressor should trip immediately as the tempered water system is tripped. The EPC argues that then...
  9. planck121

    Steam turbine discharge

    Hello We are looking at possibly increasing the steam turbine speed by about a 150 rpm to bring down the discharge temp of the steam for downstream equipment. This is a small single stage turbine. And the plan is to increase the speed at no load condition to drop steam enthaply. The use of...
  10. planck121

    Pulsation Dampner on Reciprocating Compressor

    Hello, We are facing an issue with one of our standard requirements versus what the vendor has been proposing regarding drain connections on the pulsation dampners on a recip machine. The machine is for hydrogen use and is a 3 stage recip machine with intercoolers with a MP and HP hydrogen...
  11. planck121

    Reciprocating Compressor - Manual Shut down

    Hello, I would require some help and feedback in the following: We have a H2 recip machine and vendor is proposing some manual shut down operation actions for the recip machines. They claim the settling out pressure of the recip machine is too high so in the case of emergency trip/shutdown...
  12. planck121

    Recip machine - Unloader valve actuation

    Hello everyone, I was in a recent dicussion with one of the compressor vendors who will be supplying a recip compressor for our plant. The compressor is in 99.9% pure H2 service. The vendor is and the manufacturing of the compressor will be in Europe. But the comrpessor will be operated in...
  13. planck121

    KTR vs MetaStream Couplings

    Hi, I am in the process of making some coupling selections for your project machinery. Our standards typically call out for john crane coupling (metastream) brands. However, in this situation due to lateral and torsonal analysis calcs John crane is unable to provide the right type of coupling...
  14. planck121

    Strainers on CW inlet on seal flush coolers

    Hi We have a poor quality of cooling with debris and other Things in the cooling water. This causes plugging of the Conical strainers on the inlet to the seal flush coolers. Are there any suggestions to try to avoid this in terms of Strainer designs or other options. Thanks
  15. planck121

    Valve Unloaders - Hydrogen Recip Machine

    Hello All, I have recently run into some issues with using instrument air versus nitrogen for actuating the valve unloaders on a hydrogen service recip machine. In our existing plant we have recip machines that are using instrument air for capacity control of the existing hydrogen compressor...
  16. planck121

    Running 2 small pumps in parallel vs one single pump

    Hi, Is it possible to show that running two pumps (smaller) is cheaper than running one single centrifugal pumps. I believe the energy savings are better in running two smaller pumps (esp given process variability in a running plant) since they are able to handle this better than running a...
  17. planck121

    Vertical VS6 versus Horizontal - Lean Amine application Experience

    Hello, I am in the process of overseeing selection of a pump for a lean amine application in our plant. The vendor is proposing the use of VS6 type pump for this application due to issues with NPSH requirements on the Horizontal type pumps for simliar service. I am particular not comfortable...
  18. planck121

    Mechnical Sealing on CO2 Integral Gear Compressor

    Hello, I am in the process of selecting/deciding on a mechnical sealing arragnement (single versus dual/tandem) arragnment for a CO2 integral gear machine with the EPC firm. While selecting seals (dual versus single) is highly dependent on the nature of the process. What is the general...
  19. planck121

    Recip Compressor - Loading Control (100% spill back versus suction Unloaders)

    Hello, I am presently involved in a project where we are planning to install two H2 recip machines. The question is operations at plant want a 100% spill back control of the machine. Personally myself I have seen 50% spill back control and 50% based on suction unloaders makes it more reliable...
  20. planck121

    Sommerfield Number and Rotating Machines

    Hello, On the lateral analysis reports of rotating machines we often come across of the Sommerfield number. What is the practical implication of this number? I believe a higher number (since it is in simulated conditions) shows that there is more thicker of a hydrodynamic oil film. But I am not...

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