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  1. redclift

    Defect on HDPE Flange

    HI weldstan, Thanks for the correction of the termniology. Yes it's damage not defect. I found the acceptance critera as per PPI (Plastic Pipe Institute). thanks,
  2. redclift

    Defect on HDPE Flange

    HI all, thanks for the input. @mk3223 the flange was found with some defect on the construction yard due to impropre storage / packing. Vendor explained that it's defect on HDPE still OK, and there is some guidance that the maximum radial scracthes is 1/3 of flange width and max. depth is...
  3. redclift

    Defect on HDPE Flange

    Hi all, I have problem with my HDPE flange. There are some defects found on the flange surface of HDPE Flange. What is the acceptance criteria to asses the defect?? As i know, for metallic material we can refer to ASME PCC-1,but i dont know for non metallic material. Thanks.
  4. redclift

    Isolation Valve for Manifold (offshore)

    Dear,Fellows In Wellhead Platform design, which valve (Isolation Valve for Manifold) shall be used? Gate valve or Ball Valve? in my point of view for gate valve, - it can be Broken the gate valve when open with big delta pressure. - potential damage if wrong operation of gate valve which will...

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