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  • Users: ER_Azza
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  1. ER_Azza

    Dead head pressure when the density is not water

    Hi All A bit rusty with pump stuff. Any rotating equipment guru out there if can help me I appreciate it. I am looking at centrifugal pump curve (Dead head at 85m) Based on water. However, the system I am looking at has slurry. SG at 1.25. I remember the head don't change, pressure do. (p =...
  2. ER_Azza

    Options: Booster pump at start or halfway

    Hi Gent A bit of challenge. The Project team is considering to install a booster pump to compensate for the elevated location of the collecting dam for slurry. One option is relocate at the current pumping station. Another option is to install almost 1/2 way. I guess there are pros and cons for...
  3. ER_Azza

    Pressure Relief & Vacuum breaker in storage tank

    Hi All I am checking the requirement if there is a need for Pressure/vacuum relief valve on a slurry tank. API650 design check, internal pressure was calculated at 8.1kPa. I believe API650 allow for up to 6.9kPa. However, there is tank overflow to a seal pot downstream (built to AS1210), which...
  4. ER_Azza

    Best Practise - Decommissioning of pressure vessel

    Hi All Have an old redundant and decommissioned air receiver on-site. Apart from the de-registration process, we normally disconnect any pipework connections to the vessel to ensure no possibility of leak product into it. Seems to be the best practise at many places I had work. But I never find...
  5. ER_Azza

    Sump Pump Selection

    Hi All Need a a bit of help. Not my speciality in pump. Has an old sump pump, pumping water on a 2" pipe to a header - check valve before entry to the 8" header (about 5 meter high). Pump is running at 1460rpm. Pump head is 20m. Looking to buy a spare and the only one proposed/available by...
  6. ER_Azza

    (Temporary) Stiffener Sizing for Boiler / Tower cut out.

    Hi All I just can't remember the standard for this. Done once before but now can't remember the info in ASME Sec VIII, I think. I need to do a temporary cut out at the (acid) tower for access during shutdown. Possibly size of about 1500 x 1000mm. I just need to size the temporary stiffener for...
  7. ER_Azza

    Stich Welding

    HI All Need your opinion. I am no welding expert. I am trying to weld a small shield plate (3mm) (non-structural) to a frame. However, I am concern with the potential warping of the thin plate. Thinking of doing stitch welding to mitigate this (as opposed to full perimeter weld), but I am...
  8. ER_Azza

    Slew Bearing Repair (Ship Loader)

    Hi All I am looking at option, if there is one, to repair a slew gear due to excessive backlash on a ship loader. As you are well aware, replacing the slew gear is a massive exercise by itself. Wonder if anyone out there knows a company that might be able to perform the "repair" work on-site...
  9. ER_Azza

    Hydrocarbon stop valve

    Hi All The bunded jetty I am working at has draining system for rainwater to a storage tank. (The jetty has fuel import facility, so some traces of hydrocarbon initially) There is a bypass valve to drain to the sea. Normally during rain, it will initially drain to the tank. After 10 min at...
  10. ER_Azza

    Isotainer Inspection & Repair Standards

    HI All I work at remote terminal with jetty for hydrocarbon/fuel and as well as fertilizer import. There is an Isotainer which is used to collect rainwater from the jetty bunded area. (That tank gets emptied when almost full via a vac truck). I would say 90% would be rainwater (and the rest...
  11. ER_Azza

    Conveyor belt for Sulphur prill

    Hi All Need a bit of help or feedback. Just started work in sulphur transport setup from ship to stockpile via conveyors. In the past, the conveyor (belt) material use was anti static type. However, in recent times, I found that fire resistant anti static (FRAS) belt replaced the Anti Static...
  12. ER_Azza

    Testing (Hydro) of a spare valve

    Hi All Need a bit of opinion. I've work at different companies and many have slightly different rules when it comes to using a spare valve (new or refurbished). When a valve (out of storage) is to be used, it will need to undergo a hydro test if the last test was done on it more than a year...
  13. ER_Azza

    Aviation Gas

    Hi Working at the fuel terminal, I encounter ball valve issue. It gets pretty tight (only jerky motion) when trying to operate it. (The ball valve is after the tank skin gate valve and strainer) It gets harder to operate over time. Had to replace the valve every two to three years it seems...
  14. ER_Azza

    Air Pocket issue on pump suction

    Hi All Rail car tankers are connected to pipework via 4" hose. This is to transfer fuel to the terminal fuel storage. Unfortunately, inherent in the original design, after the NRV and valve, it step up to a 6" pipework. A short pipework before the pump suction of the same 6". There always...
  15. ER_Azza

    Corrosion Scab underside of a pipe

    Hi All One of our pipe has a scab at the underside of where the support used to be. A new pipe support was installed not too far away but the pipe where orig support location is was never prep and recoated. It is a 4" pipe. NDT shown enough metal thickness. Had tp do RT since PEC was not...
  16. ER_Azza

    Syphoning effect on pipework

    Hi All We had recently changed our pump (for our effluent system) from a screw pump (BLUE PUMP) to an air operated diaphragm pump. Simple setup. When we stop the diaphragm pump, the discharge pipe maintain its syphoning effect and still pull the effluent from the suction side (due to the...
  17. ER_Azza

    Tank wind girder corrosion

    Hi All I need a bit of pointers on the best repair option with the tank (fuel) remaining online. Therefore no hot work There is corrosion on the wind girder of a tank. Look for ways to repair and arrest the oorrosion. See photos. Any feedback would be appreciated.
  18. ER_Azza

    Valve orientation

    In a processing unit, 2 x 20” gate valves serve as the battery limit isolation to the venting flare. These valves don’t operate regularly. Possibly, once every 18 months. But when we do operate them, the deposit on the seat will result in the valve unable to close fully -passing. I wonder if...
  19. ER_Azza

    Line pipe blinds feedback please

    Hi All I am considering putting in line blind in place of spec blind on our venting (DN600) pipe. However, I could not find the review on the performance and reliability of these line blind, other than from the OEM, which is obviously biased. We would need to swing the current spec blind once...
  20. ER_Azza

    Pipe size

    Hi All I am looking to install a 220L/m diesel dispenser for heavy vehicle at remote site It is a short line from the tank to the pump and dispenser I done some calc and seems using either 2" or 3" pipe would be okay for the application. Can I get some advise out there from your experience on...

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