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  1. Amirrul

    blasting surface roughness

    Hi all, is there any tolerance for blasting surface roughness?. in this case the acceptance criteria is 50 - 100 micron, but what we achieved on site is 180 micron. is it still acceptable or any problem that may be occurred if there is excessive lasting surface roughness?. appreciate the advice.
  2. Amirrul

    Roof external welding after hydrotest

    Thanks IFR for confirmation.👍
  3. Amirrul

    Roof external welding after hydrotest

    Dear all, Can we perform welding repair for roof plate(fixed) after completion of hydrotest?.do we need to re hydro again after repair?. Thanks.
  4. Amirrul

    3 laps joint for above ground tank as per API 650

    Hi all, this is the actual site photo. Appreciate your advice on this. And any consequence if we dont follow the minimum 300mm distance? Any integrity issue?
  5. Amirrul

    3 laps joint for above ground tank as per API 650

    Thanks HTURKAK. Sorry i attached a wrong drawing. Attached drawing is the correct 3 laps joint. Current issue is the 3 bottom plate laps to each other. Is this consider as 3 plate laps joint also?. No lapping on the annular plate actually. Thanks.
  6. Amirrul

    3 laps joint for above ground tank as per API 650

    Hi all, need your professional view on my case: Our tank is fabricated following API 650 and now the concern is on 3 plate lap joint. We have 3 bottom plate that sit together and was welded with lap joint. Is this consider as 3 plate joint?. This is the clause on API 650 section 5.1.5.4.2...

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