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  1. metalhoosier

    Differentiate between 15-5PH and 17-4PH

    What is the best way to differentiate between 17-4PH and 15-5PH material? My arc/spark machine results say the Cr content is lower than 17-4 range in the 15-5 Cr content range. Is there an appreciable difference in the amount of ferrite in 15-5 verses 17-4? What etchant will best show this...
  2. metalhoosier

    B16 equivalent in plate?

    Can anyone suggest a plate specification that meets the requirements for B16 material? Thank you, MetalHoo
  3. metalhoosier

    Inspection for carburization on 3XX Series stainless boiler tubes

    Folks, Anyone know a quick visual method for determining carburization on 3XX SS boiler tubes (waiting for coal ash corrosion is too long). I anticipate we will sandblast several strips across the pendants and then use ??? (etchant) to determine the severity of carburization the pendant is...
  4. metalhoosier

    2.5" socket weld connections

    When the electric utlity plants I work with were built (60's, 70's, 80's), the original engineering construction firms, two different ones, used construction specifications that did not allow high pressure (2000-2900psi), high temperature (1005F) socket welding over 2". B16.11 is acceptable to...
  5. metalhoosier

    Is code case 2235-9 applicable to B31.1?

    Can Code Case 2235-9 - Use of Ultrasonic Examination in Lieu of Radiography Section I; Section VIII‚ Divisions 1 and 2; and Section XII be used for B31.1 pressure piping? My first answer is obviously no based on the criteria called out in the title of the code case, however, a contracted NDE...
  6. metalhoosier

    Absorber tower repair with Alt PWHT

    I have an absorber tower where an MDEA amine solution is part of the process stream. Repair welding (fillet welds) is needed on the ASME pressure vessel. Almost every document I have researched instructs PWHT to be performed after repair welding. The material is 15/16" SA-212-B plate and the...
  7. metalhoosier

    Online NDE Training

    Does anyone have recommendations for a quality online NDE training program to satisfy MT and PT requirenments per SNT-TC-1A? We are investigating starting up our internal NDE program and sending multiple techs/ engineers to a training site is not an option. Thank you, Metalhoo
  8. metalhoosier

    2x Chromium in A532 using PMI

    Why do I obtain readings from a calibrated portable alloy analyzer (Xray tube) of 45-58% Cr for A532 (28G) material which should be 23-30% Cr? Is it due to the volume of carbides on the surface of the cast impeller part between the interdedritic structure? I have no way of verify the...
  9. metalhoosier

    1996 IX Code change

    From what I am told, in 1996 some electrode mfg's went to the ASME code stating they could not meet the mechanical requirements for a E9018 and others could. So the code was changed stating that the E9018 can now be used and called an E8018. Well, the electrode suppliers who were able to meet...
  10. metalhoosier

    Section IX Base metal question

    I have a qualified PQR for welding P1 to P45 material with 5.11 filler material. I have created a WPS for joining these two materials together however I do not have spare P45 material to certify my welder. Am I correct when referring to QW-403 that I can use another base material (say P1 to P1...
  11. metalhoosier

    B31.1 DMW weld question

    Per 2007 B31.1 Section 5, 127.2.1, E)"When austentic steels are joined to ferritic steels, the weld metal shall have an austenitic structure." Does anyone have any thoughts on this statement for the example below? For example, if one had a threaded/seal welded thermowell attachment where the...
  12. metalhoosier

    SA-213-T14 tube material

    Is anyone familiar with this material specification? We currently have this material on one of our half century old boilers and I'm trying to determine the correct P-number/F-number for repair of this material. It is a 2% chrome tube. Is it considered P5a or P4 material? Thank you, Metalhoosier
  13. metalhoosier

    Weld repair of a sour service carbon steel vessel

    I have a vessel 14psig and 220F that needs repair due to a pinhole leak. The vessel contains sour service gas. The vessel is 40+ years old SA-212 material, 0.250 min wall thickness that was fully stress relieved after fabrication. We intend on: 1) performing a local hydrogen bake at 600F for 2...
  14. metalhoosier

    AISI, SAE Conversion for SA-387 Grade 11

    Does anyone know of a good conversion material similar to SA-387 Gr 11 in AISI/SAE OR know of someone in the states who supplies this material?
  15. metalhoosier

    Welding SA-213-T9 to SA-213-T22 with a TP304H safeend

    Would someone mind giving their thoughts on this weld connection on a RH crossover? This was originally called out by the OEM. I would think a P5A to a P5B would last longer due to the closer coefficient of thermal expansion, especially with the fluctuation of temperature a RH can see during...
  16. metalhoosier

    NB numbers, ASME stamps, both, OH MY!

    I have access to in service pressure vessels with NB numbers, or ASME Stamps, or both that have been installed over the past 40 years. I'm trying to sort and catalog these vessels to determine if further classification is needed. Can someone shed some light on what parts of what ASME sections...

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