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  • Users: ledon
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  1. ledon

    drawing callout for UT inspection

    There is a great deal of information missing from this. Type of cast material, grain structure (course or refined), inspection method required (Longitudinal or Shear), etc... If you only have the base specification and not the acceptance severity level, then you should inspect to the most...
  2. ledon

    No mention of MT testing in ASM Handbook Vol 15 - castings - Nondestructive Evaluation

    As metengr stated, MT is better for local area and repair. A complex casting can present many problems that would be difficult to overcome in a 100% Volumetric inspection. Magnetic writing at fillets and thickness transitions, gauss saturation in thinner areas, etc.
  3. ledon

    ASME V Sensitivity 1-2T

    The obvious answer would to select which quality technique you want to use. Wire type or plaque and reinforcement shim. The wire is a direct measure which does not account specifically for the reinforcement. The reduced hole diameter in the plaque compensates for the standoff attributed to...
  4. ledon

    Creation of a weld defect to qualify a procedure

    The quickest and easiest way to create a weld defect to prove a repair procedure is to use a cutting wheel. Half way through the intermediates cut a notch in the weld 1.5 times the depth of penetration then complete your weld. RT will show a lack of fusion in that area. Effectively, you are...
  5. ledon

    NDT for a Steel Skid per Section V

    Moltenmetal Please correct me if I'm wrong... I haven't worked to CWB standards for a very long time. But, doesn't the CSA standards require the designer to specify the manufacturing code in the design specification, the same as AWS and ASME? As an example AWS D1.1 para. 1.4; Responsibilities...
  6. ledon

    NDT for a Steel Skid per Section V

    Unless this is an in-house project and you are the designer / manufacturer /end user, the customer must choose a manufacturing code. It should not be left to the manufacturer to decide which code best suits the designers intent. I suggest you go back to your customer for clarification...
  7. ledon

    NDT for a Steel Skid per Section V

    Your inspection company should have procedures qualified IAW ASME V. As the manufacturer, you are required to review and verify those procedures are compliant with your needs. As metengr stated the actual types, number and acceptance criteria of inspections required, (if above the general...
  8. ledon

    NDT for a Steel Skid per Section V

    The first question should be, what code are you manufacturing it too? The second question is, what materials are you manufacturing it from? And the third would be, what intended service? Section V only gives inspection certification and procedural requirements. Only the manufacturing code...
  9. ledon

    UT Thickness Check Personnel

    Nearly every code has some requirement for qualification of UT personnel. But that aside, even if you are not working to a code you should require at least verifiable training and qualification to the machinery being used. If the wrong probe is used, the velocity is incorrect, or even a single...
  10. ledon

    Welding 17-4 PH to A-36 Carbon steel

    Thank you for the comments. I was leaning toward ER309. The material is solution treated with no PWHT required. It is to be a wear ring in a rotating foundation.
  11. ledon

    Welding 17-4 PH to A-36 Carbon steel

    I am not familiar with 17-4 PH bi-metallic applications. Could someone tell me what the best filler metal would be?
  12. ledon

    Feild Weld rejection %

    Most customers I have worked with gauges rejects per welder and per task or contract. For structural work the rate is normally calculated based on linear inches of weld performed versus linear inches rejectable weld or per joint. For piping the basis is total number of joints welded to number...
  13. ledon

    Heat Treatment

    Looking for the reference materials on general heat treatment techniques and basic parameters for metals. This is to help educate someone without and engineering background. Any suggestions?
  14. ledon

    Correct welding symbols

    Case A would be correct for a butt joint but not if you required a fillet. However, your drawing shows that a butt joint would be impractical. Case B, 1st symbol would be correct for a fillet requirement.
  15. ledon

    Low Temp Weld Procedure

    My question is why you would need a low interpass technique on cfe pipe?
  16. ledon

    Assembling 303 Stainless

    If manufacture process requires welding of the 303, I would suggest looking for an alternative material. 303 is not generally suitable for welding.
  17. ledon

    Xray GMAW

    The answer is yes. Provided all the radiographic parameters for density, sensitivity and latitude are met you will be able to pick up any flaws that would normally show in any other welding process.
  18. ledon

    New to welding

    Brazing is not a good option for many reasons. The reason stated by RossABQ is chief among them. Gas welding is often used, (same process, different filler metal) but warpage due to heat control is an issue. The use of bondo is fine, but if the kit car is metal then I would suggest lead...
  19. ledon

    What weld symbol is appropriate for this

    That is dependent on the thickness of the base materials, and the degree of penetration required to provide the designed strength. Example: if the thickness is 1/4" then a groove would be required to provide 100% penetration and 100% joint strength. Where a partial penetration or fillet joint...
  20. ledon

    New to welding

    Gas shielded MIG and TIG processes are the best for most automotive work. Stick is hard to control and nearly impossible on thin sheet-metal. Gas-less Flux-core is too hot and causes a lot of warpage. MIG with an argon gas shield (argon provides the best cooling effect) will provide a denser...

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