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  1. zhamal

    Spare future nozlle

    Hi everybody, I got the issue with cutting the shell plate for nozzles. The issue is that in the drawing it is said Spare (future) (nozzle name). Should it be done someday in future or what? Nozzle number is...
  2. zhamal

    Pickling and Passivation of LOX tank

    Hi friends, Let me narrate all the things here from start Liquid Oxygen tank with outer tank and inner tank which is stainless steel . Inner dia 15 m. Height up to roof compression ring is 12 m. UNIT ASU, GTL PROJECT. Contractor decided to hand over pickling and passivation work to...
  3. zhamal

    Mechanical shoe seal -Rim Vent

    Hi all, Should Rim vent breather valve for floating roof with mechanical shoe type sealing be installed before or after Hydrotest? All the works of Sealing are installed up to hydrotest. Tank height 21900mm, OD 37700 Product: Naphta
  4. zhamal

    Cryogenic Tank LOX storage.

    HI Everybody here! We are constructing a cryogenic LOX Tank. Min. temp -196 C, max is -20 . For now all pipe lines have been tested for pneumatic. Thte tank is ready for Hydrotest. Before hydrotest we are cleaning the tank with usin UV light Magnaflux 6000. For Cleaning actually must be used...
  5. zhamal

    Bio sludge Tank

    Bottom thickness 7.5 mm. It is a brand new tank. It is hydrotested with a just simple water without any sludge. Twice.
  6. zhamal

    Water is coming from NPT hole of th

    Water is coming from NPT hole of the Re. pad. What can be the reason? the excess neck of nozzle from inside had been cut and flush grinded. My fear is that construction team didnt weld shell to nozzle from outside and when they sand blasted shell from inside they damaged the flush grinded...
  7. zhamal

    How to repair this holes in secondary seal

    How to repair this holes in secondary seal of aluminium ponton. Brand new material. During assembly was damaged. From top of the ponton not possible already. How to repair from downside, any idea without...
  8. zhamal

    Bio sludge Tank

    Hi dear sir , I work in Contractor. I am responsible for Storage tanks. We have one tank that keeps inside gas to liquid bio sludge in future. We have performed hydrotest . But bottom plate went down , buckling came out . Owner rejected it made Hyundai design company to revise drawing and...
  9. zhamal

    Painted Anchor chair

    Hi all, water storage Tank . During blasting and painting of the tank, blasting and painting team not knowing blasted and painted all anchor chairs with its thread in full. To close NCR issued by Owner no idead whatr to write down on it . Pls smb tell corrective action some good technical...
  10. zhamal

    Foam chamber

    Hi all, Tank construction team is going to remove scaffolding from inside of the kerosene storage tank. But we dont know whose scope IS TO INSTALL FOAM CHAMBER ? Is that instrument team job? Or should construction team install themselves?
  11. zhamal

    Condensate and Aqueous Tank

    Material type A516-60+ S5, 1 st shell. From inside of the shell there are pittings. Thickness 16 mm. Tank is almost ready to Hydrotest. Ponton type tank.Any solution to this problem? Thank you.
  12. zhamal

    Compression ring to roof joints in Storage Tank

    Compression ring to roof joints weld visual inspection has been accepted. NOw Client is aking me to check for MPI. But i am insisting that this is checked when we check for Pneumatic test. API 650 tells nothing about it.
  13. zhamal

    Buckling on the shell

    I am General Contractor. Owner asking X ray for all places. But this not not cut and this is just for giving the heat to shell to remove buckling. RT is nonseless .
  14. zhamal

    Buckling on the shell

    Hi all, there was bulge on last shell due to some weld destortions during welding clips outside. it was noticed just in Final walkdown inspection before hydrotest. Subcontractor which is constructing the tank just put new weld on the shell from inside thinking it gives to shell...
  15. zhamal

    Back Gouging : Shell to shell- NDE, Storage Tanks, API 650

    Hi all, Pls i need help. Tell me pls is there any NDE requirement after back gouging of shells on storage tanks. Could not find anything for it in API 650. We ve been doing Magnetic particle test till now, but my QC manager was not aware of this and he is yelling that this just waste of money.

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