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  1. ingsergiogarro

    Change in penstock thickness

    Good morning We have a doubt concerning a change in penstock thickness. Here is the sequence from uphill to downhill: Diameter: 102" Lenght: 209ft Thickness: 36,51mm Slope: 24° Then an bend Diameter: 86" Lenght: 177ft Thickness: 31,75mm Slope: 20° Then a trifurcation and then the Power...
  2. ingsergiogarro

    Welder qualification for 8ft penstock

    Good morning. We are welding 8ft diameter penstocks, 1-7/16" thick, with SMAW, in a 35° slope. We have K-type bevels so we have to weld externally and internally. Our inspector is requesting 6g certified welders, but we have only 4g welders. Does a 3g and 4g welder are certified to weld this...

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