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  1. SuperLectric

    GE Material Specification

    metengr, I'm not sure if the plant has temperature probes on the sealing steam, I will need to verify. We have not contacted GE yet. I would like to get a proper material analysis performed to determine the true pipe material. It is a mystery until we take either of those steps. Thank you.
  2. SuperLectric

    GE Material Specification

    metengr, I've based the 950 deg F temp based off the seal steam header drain temp, which is assigned a temp of 950 deg F on our GE drawing. I would not think the seal steam header would actually operate at that high temperature, but I am confused why the drain on that line would be assigned...
  3. SuperLectric

    GE Material Specification

    Also, thank you for your time.
  4. SuperLectric

    GE Material Specification

    We have not re-inspected the material yet. After taking a closer look, I noticed that several flanges attached to this seal steam header pipe were stamped as made with A 181 steel. That would corroborate the GE B4A39 material specified on the BOM, even though it has a lower temp rating. Without...
  5. SuperLectric

    GE Material Specification

    I wasn't present for the testing, nor did I specify specific surface prep... I was told the plant used a wire brush and sand paper to prepare the surface. I'm just not sure where the Titanium measurement would have come from if it wasn't in the metal itself.
  6. SuperLectric

    GE Material Specification

    As a follow-up, the plant had the pipe tested with a PMI gun. The picture shows results they sent me from the test. The gun did not provide a match from its material library. I could not immediately find a matching composition in the B31.1 book. I'll have to do some more research to find the...
  7. SuperLectric

    GE Material Specification

    Thank you for the quick response to this. I double-checked and the design temp for this line is indeed listed as 950 F. Although you're right, that doesn't fit the temperature range from your manual... Given this discrepancy, we may use a PMI gun to verify the material. Thank you again.
  8. SuperLectric

    GE Material Specification

    Hi All, First post here. These forums have been very helpful for a young engineer. Is there an equivalent ASTM specification to GE's B4A39 pipe specification? The B4A39 designation was listed on the BOM for a 1960s vintage Turbine. We are planning to make a welded connection to this line and...

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