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  1. sharmass

    Normalized w/Accelerated Cooling & Tempering (NACT) vs Normalize & Tempered (N&T)

    If you consider 2023 edition of Sec VIII-1 or VIII-2, Code has changed for P1 Gr 1 and 2 materials. Heat treatment condition is no longer a variable enforced by construction Code. If the material is other than P1 Gr 1 or 2 or if you are mandated to use edition prior to 2023, NACT should be...
  2. sharmass

    tubesheet to shell butt weld joint radiography

    Refer UW-51(a)(4) of Code Section VIII-1-2015 As an alternative to the radiographic examination all welds in material 1/4 in. (6 mm)and greater in thickness may be examined using the ultrasonic(UT) method per the requirements of 7.5.5 of Section VIII, Division 2. Which is automatic or semi...
  3. sharmass

    Allowable Stress Value for ASTM A155

    Jinunim You can try National Board for out of print ASME editions. http://www.nationalboard.org/Index.aspx?pageID=290
  4. sharmass

    Repair Boiler Field Assembly. Is it R stamp is apply??

    Agree with Metengr There is a good old interpretation I-98-35 from ASME about this situation.
  5. sharmass

    UG-99 (b) or (c)

    ElCid, One way to do is to reverse calculate the stresses (S) in pressure parts with pressure P = 10bar and thickness of the pressure part in new condition and ensure that the stresses are less than yield strength of material at room temperature. You also need to talk to your AI about this...
  6. sharmass

    Design pressure limits in ASME Sect.8 Div.1

    Section VIII-1 is not restricted or prohibited for use at this pressure temperature condition. Depending on size (dia and length), VIII-2 may be economical. As XL83NL advised ensure you are complying with jurisdiction. Better talk to your AI
  7. sharmass

    UG-99 (b) or (c)

    Dear ElCid UG-99(c) hydrotest pressure is the calculated test pressure in new and cold condition of the vessel. It is derived based on the actual thickness used and in new condition (un-corroded) . Maximum allowable pressure (MAP) is reverse calculated for all pressure parts. This pressure is...
  8. sharmass

    Leonardo da Vinci and BPVC

    good information victorpbr
  9. sharmass

    What FEA analysis is needed for Division 1 certification?

    SnTMan is correct Look for the words "U-2(g)" in the Code. Wherever it says "Use U-2(g)", you can use other design method including FEA
  10. sharmass

    ASME VIII DIV 1 - Consumable Pre-Test UHA51

    DEAR PVTC You need to satisfy all the conditions UHA-51(f)(1) thru UHA-51(f)(4). Since you are using GTAW, UHA-51(f)(1) is satisfied You need to have PQR done with impact tests to satisfy UHA-51(f)(2) Since you are using ER308L, UHA-51(f)(3) is satisfied For GTAW, applicable paragraph is...
  11. sharmass

    Minimum required thickness

    Dear DSB123 You need to consider all design loading conditions (pressure including internal and external, temperature and other loads) for minimum thickness determination. 1.5+CA is Code permitted minimum thickness provided other design rules are met
  12. sharmass

    welder qualified

    Stan3126 Both base metal P no and Filler Metal F no are essential variables for welder. GTAW F no being 6 for both carbon steel and duplex consumables, you may use welder qualified on P1 to weld P10H For SMAW F no is not same for carbon steel (F no. 4) and Duplex (F no. 5). In this case you may...
  13. sharmass

    two welding PQR procedure( SAME GROUP) can add thickness

    Dear Stan3126 Both base metal thickness and deposited weld metal thickness are two different essential variables. PQR made on 3/8" thick is qualifying minimum 1/16" and maximum 3/4" base metal and a maximum of 3/4" weld metal thickness. You can't use any of your PQRs to weld a 1" thick base metal.
  14. sharmass

    Minimum required thickness

    For crude oil service you need to meet UG-16(b)that is minimum thickness to be 1.5mm + Corrosion allowance. In addition you need to perform UG-27 calculations based on design pressure and temperature
  15. sharmass

    Fabrication according to previous ASME BPVC edition

    ASME mandates use of governing Code edition that depends on the contract date. One must use edition of Code that is mandatory on the date you signed contract. Code editions become mandatory 6 months after the issue. That means 2017 edition was issued on July 01, 2017 and has become mandatory...
  16. sharmass

    ASME Sec VIII Div1 Lethal service and PWHT

    There are various Code interpretations on this issue: Record no. 15-634 Question : Are corrosion resistant weld metal overlay welds or welds attaching corrosion resistant applied linings on carbon steel vessels in lethal service exempt from the PWHT when applied following the provisions of Table...
  17. sharmass

    Change of A-No., new WPQ needed?

    ER70S-6 does not meet A no. 1 requirements due to Mn content it may have. You will have to use provisions of QW-404.5 and qualify WPS with this consumable. Instead of A no. you can write the classification (ER70S-6) on WPS QW-404.12 also applies when impact tests are required
  18. sharmass

    R Stamp (ASME Code)

    Code construction is considered as complete when the data report is signed and vessel stamped. It has nothing to do with "whether put in service" or "still in shop not delivered". For R stamp on missing part, it depends on various factors: Whether the vessel was PWHT, whether impact tests are...
  19. sharmass

    PWHT above the upper transformation Temperature

    Some times formed heads containing weld seam are normalised after forming or solution annealed (SS). In those situations you do go above upper transformation temp
  20. sharmass

    U-1A Form ASME Sec VIII Div 1 - 2013

    It should have been 20, 27 and 31 All you need to report in this part is Material specification/grade of Head, Whether any post forming heat treatment was performed and if there is any Category A welds within head and if yes, the extent of RT and efficiency for such joints. In the form U-1, you...

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