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  1. DekDee

    Tangential Radiography of 16" pipe

    Thank you for the response Steve - learn something new every day. Cheers
  2. DekDee

    Tangential Radiography of 16" pipe

    We did this many years ago. Took a sample ( exact thickness and diameter) boiler tube and machined multiple slots at increasing depths on the internal surface. Radiographed that tube as a reference graph. After radiography of suspect tubes the density of any internal corrosion was compared with...
  3. DekDee

    Tangential Radiography of 16" pipe

    Steve - where does the 115 mm penetrated thickness come from ? OP has stated WT as 9-12 mm so penetrated thickness would be 18-24 mm (DWSI) ??? Or am I missing something here ?
  4. DekDee

    Question of scope of ASME BPVC SECTION IX

    FOREWORD The Committee does not rule on whether a component shall or shall not be constructed to the provisions of the Code. The scope of each Section has been established to identify the components and parameters considered by the Committee in formulating the Code rules. Which section are you...
  5. DekDee

    ASME SEC.IX WPS filler designation

    Have a look at QW 404. You must list all essential and non-essential variables on the WPS. QW 404.12 is the only one that concerns you.
  6. DekDee

    ASME SEC.IX WPS filler designation

    Without even going into the technical side of it ask yourself - " Why do we have WPS's" ? To provide guidelines for the welders. Does the welder carry a copy of ASME IX in their back pocket ? - No. How does the welder know if an alternative filler is acceptable if it is not noted ?
  7. DekDee

    Weld Repair metallurgical influence in Gr.91 welds

    Why would 1 x repair require a retest. That is ridiculous. You do nothing but post negative comments. If there was a BLOCK button I would be using it right now.
  8. DekDee

    Weld Repair metallurgical influence in Gr.91 welds

    metaleng123, This is a question for your client. Submit a repair request to them. If this was discovered after PWHT it would be a different story but a localised repair (20 mm) prior to PWHT should be no problem. What is the fabrication / construction code ?
  9. DekDee

    CVN test at Weld Metal with ER70S-6

    r6155, Stop being so bloody critical all the time. You do nothing on this forum but criticise. "It is very difficult for me to explain the test results to Client." - do you with all your wisdom have an explanation to offer the Client ? karik87 does not need to be qualified or to take a Welding...
  10. DekDee

    Combine thickness and diameter qualified range of welder according to ASME IX

    No interpretation required. The scenario that is commonly used world-wide is your example Pipe 01 GTAW but your Pipe 02 will be GTAW/SMAW and this covers the majority of welds the welder is likely to encounter on that particular project. Unless there is a particularly stringent requirement you...
  11. DekDee

    Weld Repair metallurgical influence in Gr.91 welds

    ????????????? The welder has failed and a retest is required. ???????
  12. DekDee

    Dissimilar Metal Weld Qualification

    As noted it is not a code requirement but strongly recommend you include the MTR with your PQR. I do not know any Clients or Clients Representatives (myself included) who will accept a PQR without confirmation of the mechanical and chemical properties of the test coupon. On re-reading your post...
  13. DekDee

    GTAW WPS using GTAW/SMAW PQR

    Basically No - if your original PQR was on any thickness 10 mm or below you could write a WPS for 1.5 to 6 mm
  14. DekDee

    Unknown steel

    As noted more info would be helpful. FB 50 could possibly be Flat Bar 50 mm width but without more info - ??? OX 520 is shown on Google as being equivalent to S355 J2 so that may help. What is the reason you are investigating ? Replacement, Repair ????
  15. DekDee

    Repairs or Additions after Pressure Test

    Do not post a question without noting where the sentence is from - code / standard / project spec ?????
  16. DekDee

    Socket flange , scoket depth tolerance

    If you are asking about insertion depth of pipe into a socket weld flange what is your construction / fabrication code ? You will not find what you are looking for in B16.5
  17. DekDee

    Rad NDT exposure time

    mariolucas, Go to www.ndt.net and then "Forum" and ask your question. Much better chance of getting the info you require, Cheers, Shane
  18. DekDee

    Welding Joint Repair

    There is no issue with what you propose. However, consider what I noted previously. If you are getting root repairs on welds visually accessible internally then what about the rest of the welds in that "lot" ? If it is 100% NDT then no problem. If it is 5%, 10%, 20% and you have radiographed...
  19. DekDee

    Welding Joint Repair

    If you can access to reweld it is obvious you can visually examine. What about all the joints without visual access or no NDT ? Suggest an investigation of welder / s responsible would be a good idea.
  20. DekDee

    GMAW shotcircuit - Lack of fusion

    Let us forget about the ASME requirements and look at the original question (as noted by GTAW) " Can anyone share their experience on how to prevent this defect or provide recommendations for training the welders?" GMAW is probably the worst process chosen for your application and Short Circuit...

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