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  1. brandonb73

    What type of cracks are these?

    One thing I did not mention, which could play a part in this. When we first visually examined the seam, we could tell the rolling was poorly done. There were flat spots of approximatly 3-4" on each side of the seam and the seam actually met at a point (see photo) about 1/4" higher than if it...
  2. brandonb73

    Material Identification

    At the end of the report submitted by the materials lab, it states that the Alloy type is 1018 carbon steel. Is't 1018 a cold finish bar spec? The nozzle if obviously made of pipe.
  3. brandonb73

    Material Identification

    Our client has a pressure vessel in which was installed an unauthorized nozzle. The State has told them the nozzle can stay persuant to an acceptable UT test and calculations showing the material thickness is adequate. The customer has provided a spectrochemical analysis of the material. In...
  4. brandonb73

    What type of cracks are these?

    They are definetly cracks, we had RT and UT performed on them. I find it strange that the cracks jump from one side of the weld to the other. The total length of cracks on this seam was about 51" which is more than half the seam. Would these be considered toe cracks. I thought about cutting...
  5. brandonb73

    What type of cracks are these?

    The piece of plate in the photo came from a Sec. I steam boiler. This is a section of the longitudinal seam. My questions are: what kind of cracks are these and what caused them?
  6. brandonb73

    Re-rate Questions

    Ditto on what jte said. We are facing this right now in California altering a 1950 vessel. They are making us use the original 4:1 SF for design calculaitons.
  7. brandonb73

    UG-45 Question about corrosion allowance

    Must the corrosion allowance for nozzles referred to in UG-45 be the same as that specified for the shell/heads or can it be a different value?
  8. brandonb73

    Weld symbols

    I'm no welding engineer, but it really depends on your joint design. I would think you would want to put a bevel on the tubing to get good penetration. Therfore; a groove weld symbol would be appropriat. You could also leave the edges square and leave a slight gap to allow penetration. In...
  9. brandonb73

    WPS/PQR question

    I think I found an interpretation that specifically addresses your question: Interpretation: IX-81-38 Subject: Section IX, QW-202.4 Date Issued: September 14, 1981 File Number: BC-81-434 Related Documents: Question: A test coupon is prepared as follows: A 1 in. thick plate has an 1/8 in...
  10. brandonb73

    WPS/PQR question

    Review QW-202.4
  11. brandonb73

    Requirements for Code Stamps and Nonboiler External Piping

    mcadiz, its best to start a new thread for this question. You might want to think about posting it in the "Piping and Fluid Mechanics" forum.
  12. brandonb73

    Power Piping Code Gas Piping

    There are no code stamping requirements for piping attached to a Section IV (H Stamp) Heating boiler. The Boiler External Piping I referred to above applies to Power Boilers only. Since there is no stamping required, you can fabricate this piping even if you don't have a PP stamp as long as...
  13. brandonb73

    Power Piping Code Gas Piping

    AWS and ASME don't mix. However, you don't need to have a PP stamp to do B31.1 work unless you are fabricating Boiler External Piping, which I doubt you are. Get yourself a copy of ASME Section IX. It will tell you everything you need to know about qualifying welders and weld procedures.
  14. brandonb73

    SRV Question

    On a Section I boiler, the manufacturer provided a 3" FNPT connection for the SRV, but the SRV that was provided has a 2" MNPT connection. Question #1: It is my interpret PG-71.3 that the connection between the boiler and the SRV must be the same size as the SRV inlet (2"), not necessarily...
  15. brandonb73

    ASME CODE STAMPS REQUIRED

    An "A" Stamp is an assemblers stamp, but this is only found in ASME Sec I, Power Boilers. Cast Iron sectionals are cover in Section IV. Per HG-534, Field-Assembled Cast Iron boilers do not require an A stamp. However, the installer is still required to do the final hydrostatic test as...
  16. brandonb73

    oversized cleaver brooks steam boiler

    Contact a local CB rep in your area, they should be able to help. You may be looking a derating your burner.
  17. brandonb73

    Need a safety relief valve on dearator?

    What you are referring to sounds like an atmospheric DA. Unlike pressurized DA's that are designed to operate under a certain pressure (usually 5psi), atmospheric DA's are vented to atmosphere. Therefore, it is usually not required that they be designed as a pressure vessel. Also, if you have...
  18. brandonb73

    UW-52 Clarification

    So.....I'm confused about the original question, if UW-52(c)doesn't apply to Type 3 joints.
  19. brandonb73

    UW-52 Clarification

    Am I reading table UW-12 wrong? The way I interpret it, you don't get any extra credit for RT of a Type 3 joint. You just have to use a .60 join efficiency.
  20. brandonb73

    Slip on Flanges on Boiler External Piping

    According to B31.1 para 122.1.1(F), you can't use ANSI slip on flanges greater than 4" NPS on BEP? I'm confused by the reference to ANSI. Does this also apply to ASME flanges? The forward to B16.5 says that up until the 1996 edition it was called ANSI/ASME B16.5 so my feeling is they are one...

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