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Recent content by lganga

  1. lganga

    Pipe bends with less thickness than specified.

    Racookpe1978 I agree with you, and as europipe says, the reasonable action is to reject the spools, but it will stop the piping job during several months, as we have spools with the bends. For me the Construction Company, should have to verify, at least, if the bends satisfy the design...
  2. lganga

    Pipe bends with less thickness than specified.

    Big Inch If the bend has a lower design pressure than the Piping Class,then the bend does not belong to that class. In case the bend retains less pressure than the PIPING CLASS then the MAWP has to be the pressure of the bend instead of flange. As I know, all the elements of every piping class...
  3. lganga

    Pipe bends with less thickness than specified.

    Dear colleagues I am back with the thread 378 392289 of August 3rd. Reference Pipe bending. The construction company purchased, heat induction pipe bends, with a wall thickness less than specified.(higher wall reduction percentage than specified). After a wall thickness measure, in the...
  4. lganga

    Minimun required thicknes in hot bending elbow

    Dear All We have a vendor that provided induction bending spools for all the plant . We found thta the etradoshas a wall thicknes less than the specified. We wanti to select those elbows able to support the design pressure and a minimun required thickness. Ansi 31.3 defines a wal thicknes by...
  5. lganga

    How to support a heavy upper part vertical vessel during a PWHT

    TGS$ appreciate your comments i think it merits to be studied by an specialist or the vendor. Regards
  6. lganga

    How to support a heavy upper part vertical vessel during a PWHT

    TGS4 The action of temperaure expansion gives a very high tension not able to with stand yield point at 650°C vs weight and wind compression load.
  7. lganga

    How to support a heavy upper part vertical vessel during a PWHT

    Dear colleagues I have to deal with the job of joining the upper part of a heavy vessel by welding and PWHT. I have reclaim the construction company, the procedure to suport this upper part during heat treatment. This upper part is 60 mm- SA 516 70 carbon steel plate Their answer, was to hold...
  8. lganga

    Torque required for the anchor bolts of a process column

    Thanks you two Comment: The construction company wants to apply the total torque load with the column seated on the 16 leveling plates and without grouting, that gives very punctual loads on the concrete base. Should they pour the grouting for a better distribution of loads before the torque? ...
  9. lganga

    Torque required for the anchor bolts of a process column

    Tom and Duwe I have a partial calculation note from Compress . With a Summary of the loads,including Seismic and Wind loads. The bolt load, is 516,000 Newon without preload, area of the bolt provided is the double from required. 3" bolt A193B7. The engineering company wants to torque the bolt...
  10. lganga

    Torque required for the anchor bolts of a process column

    Hello friends 1) Can the anchor bolt be torqued after leveling with shims and without grouting? 2)Can the anchor bolt be preloaded with a torque, considering the bolt material condition (70% of yield? for example) or we have the risk of damaging the concrete foundation. As an example I have 3"...
  11. lganga

    An inspection of a pressure part after an accident

    metengr At least we need a leak test ,maybe Helium test for all the welds over the collectors and PT. Does the ASME inspector should be in place during this stages? or does he has to be after a leak test at design pressure. My idea is not to install the economizer before approval by ASME inspector.
  12. lganga

    An inspection of a pressure part after an accident

    Dear colleagues After a transportation accident of a trailer, the boiler economiser falled down and some structural parts of economiser were damaged. All the boiler is ASME I stamped. The boiler is assembled at site,so I have asked the owner for the inspection of the economiser with the...
  13. lganga

    Is a vacuum test enough for a leak free tank bottom?

    How to be sure to have a leak free api tank bottom?. May be MT or PT will complement. In a ring type beam wall support is not easy to detect any leak, unless you have a membrane and leak detectors between bottom plate and soil, in our case we did not have membrane for the water tank. I will...
  14. lganga

    piperack level tolerances

    I have to say, that we have two types of pipe racks, one rebar concrete frame and others out of carbon steel. I have been checking levels in the concrete one, and there are differences of as much as 23 mm between frames in 12 meters distance.The concrete transversal beams of every frame has a...
  15. lganga

    piperack level tolerances

    Dear All I could not see any document about, what level tolerance requires a pipe rack between frames? As all the pipe arrangement runs along them a civil tolerance is not allowed for a piping setting along the frame beams. I will appreciate any information you can provide Regards Luis
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