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  1. nong

    Can we use sea water in scale clean out job?

    Yes, I think I can manage the clay swell issue, bacteria issue, but my concern is scaling or ion exchange from Ca+, Mg+ in seawater. Do you have any idea?
  2. nong

    Can we use sea water in scale clean out job?

    We used filtered fresh water with NH4CL for circulate in Coil tubing job, however it's very expensive and consume time much. So we would like to use SEA WATER instead with any chemial additive, ex NH4CL to prevent clay swell(ion exchange), Bioside to kill bacteria, filtered to prevent fine...
  3. nong

    How to convert CO2 to CH4 or C2H6???

    Flareman, CO2 come from the reservoir and we don't use it to help production. We use membrane process to separate it from Hydrocarbon gas, but it's just 75% effective...
  4. nong

    Problem with Propane Condensers!!

    Yes TD2K. We used to sprayed water for others coolers. Gas leak from some tubes casing 1-2 weeks shutdown. I'm considering to change belt/pulley (speed reducer) from 6 to 3 ratio to gain more air flow. Do u think this 'll work? Another problem is we lose propane from our system a lot!!! than...
  5. nong

    How to convert CO2 to CH4 or C2H6???

    TD2K, CO2 is from reservoir(38% of nat gas). I don't think that we burn CH4 to get CO2. We have membrane unit to separate CO2 to comply with GSA(23%). Then we burn separated CO2 (75%) with little bit CH4(25%) 50 MMscfd because of membrane efficiency. I just think that we could use this CO2 to...
  6. nong

    How to convert CO2 to CH4 or C2H6???

    vsvenkat7, I don't understand what you said. We have membrane process to scrub CO2 from nat gas. Gas to flase contain about 80% CO2 and 20%CH4.
  7. nong

    How to convert CO2 to CH4 or C2H6???

    Our offshore natural gas plant have 50MMscfd of CO2 which we burn out everyday. I heard about CO2 can be converted back to CH4 or C2H6 by using H2, heat and some catalyst. I wonder that is it practical or economical? I know H2 is much expensive, so can we obtain H2 from H2O electrolysis or else...
  8. nong

    How to convert CO2 to CH4 or C2H6???

    Our offshore natural gas plant have 50MMscfd of CO2 which we burn out everyday. I heard about CO2 can be converted back to CH4 or C2H6 by using H2, heat and some catalyst. I wonder that is it practical or economical? I know H2 is much expensive, so can we obtain H2 from H2O electrolysis or else...
  9. nong

    Problem with Propane Condensers!!

    We have problem in summer with propane condensers (Air Colled H/X), outlet temp is over than design little bit( 115==> 125F) because inlet air temp is higher (90==>105F). What 'd we fix it? I heard there are some chemical that can reduce temp of propane or increase fan speed will help ? Thank you
  10. nong

    Face Velocity???

    I have Air Cooled H/X and I measure velocity at top of bay, is it face velocity as state in data sheet ??? If not, where is face velocity ? What is the relation of between total air flow and aif flow per fan because I have4 fan but multiply 4 with air flow/fan is not equal to total air flow? Thanks
  11. nong

    Website about Fin Fan Exchanger??

    I involve project about Fin Fan Propane Condenser, but do not know the definitions in spec sheet ex. Total Air Flow, Air flow/fan, Face Velocity,...what website can guide me ?? Thanks
  12. nong

    Flame at flare is blue???

    Hello all, I have question about why flare is blue in offshore natural gas plant because we have various opinion. Someone said because of H2S (>80 ppm), someone said because of CO2 (>65%) in flare. From my memory, blue flame is hotter than the orange flame since CO2 is not flamable and giving...
  13. nong

    PSV Inspection Sch.

    It said in API RP14C. Shiuld be tested annually.
  14. nong

    ASME 8 , PSV Testing

    It said in API RP 14C. Valve should teasting annually
  15. nong

    What happen with o-ring if gas is corrosive

    Our nat gas is corrosive containing high H2S and CO2. o-ring is extended area which cause valve failed. Why?
  16. nong

    why gamma scan can't detect MTZ ??(Samiran pls help).

    Samiran, Vendor said gamma can detect change in intensity 5% which in theory it's able to detect density change up to 0.00036 g/cc inmaterial thickness 227cm ( dI/I*100 = -u*x*dP*100, u=0.036cm2/g, x=227,dI/I=0.05). Then I cal from bead properties can adsorb H2O 6lb/100lb bead, bulk den...
  17. nong

    why gamma scan can't detect MTZ ??(Samiran pls help).

    Hi, Do u remember my thread about Dehydration Performance Monitoring? U said gamma scan just told whether beds are lifted or not but won't tell anything about density profile. Vendor said they can detect dif density up to .00036 g/cc. I cal from useful cap = 6lb/100lb bead == 0.015 lbH2O / in3...
  18. nong

    ASME 8 , PSV Testing

    We have 2 PSVs installed with 2* 100% capacity (for on-line testing). We now on-line both PSVs. Each PSV is planned to test set pressure every year. If we isolate one PSVs (still hook-up). Can we extend testing period to every 2 yrs? My idea is we can't, we have to test all PSVs every yeas...
  19. nong

    PSV Inspection Schedule

    I'm sorry, I mean testing, not inspection. Are there any rules in ASME state about testing frequency of stan-by PSV ? Thank you
  20. nong

    PSV Inspection Sch.

    Each PSV is planned to inspec every year. If we design to have 2 PSVs are installed with 100% capacity(for on-line maintenance), one on-line, on-standby.Can we extend inspection schedule to every 2 yrs? My idea is we can't, we have to inspect all PSVs as sch., but I can't find in API. If u...

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