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Recent content by tamal1475

  1. tamal1475

    Holding period of normalizing temperature of steel castings

    Thanks for the responses.It appears that there are different practices in different foundries. Is there any literature or standard to support?
  2. tamal1475

    Holding period of normalizing temperature of steel castings

    Is there any standard or thumb rule to decide the holding/ soaking period of temperature during normalizing heat treatment of carbon steel castings with thickness varying from 4 inch to 8 inch? I believe 1/2 hour per inch of thickness is sufficient for normalizing at 1650F/ 900C.
  3. tamal1475

    Effect of specimen width on elongation

    As per SA 213, minimum elongation specified for T12 is 30% on 50mm gauge length. However, we observe substantial difference in tested values of elongation between full section tubes specimen and 12.7 mm wide strip specimens. This is even after considering reduction factor for thicknesses less...
  4. tamal1475

    Stainless steel fabrication for high temperature steam applications

    Usually for corrosion applications we mandate precautions to be taken against iron contamination during austenitic stainless steel fabrication. Should it apply for high-temperature applications also, as for steam boilers? Normally local iron contamination on an austenitic stainless steel...
  5. tamal1475

    Stainless steel fabrication for high temperature steam application

    Usually for corrosion applications we mandate precautions to be taken against iron contamination during austenitic stainless steel fabrication. Should it apply for high-temperature applications also, as for steam boilers? Normally local iron contamination on an austenitic stainless steel...
  6. tamal1475

    Grinding on P91 weld joint

    Is there any special precaution to be followed if we grind off surface irregularities on weld joints of heavy walled P91 header pipes? Will it affect if we do the grinding before or after PWHT? The surface ripples on the SMAW weld runs are interfering with the NDT.
  7. tamal1475

    Experience of candidate for NDT level II training and qualification: SNT-TC-1A

    Can the employer's written declaration that the candidate has the required hours of experience in general NDT and specific NDT method, be considered as sufficient to fulfill the experience requirement as demanded by SNT-TC-1A for training and qualification for Level II certification?
  8. tamal1475

    Post bend heat treatment of cold bent tubes

    EN 12952-5 demands cold bent tubes with R/d less than 1.3 must be stress relieved. However, stress relieving can be waived if it can be demonstrated with a suitable procedure test that heat treatment is not required. The tubes are low alloy steel. What kind of tests can demonstrate the heat...
  9. tamal1475

    ASME Section I, PG 10.

    Thanks. Code interpretation I-92-06 allows a manufacturer to re-identify SA 106 Gr B as SA 106 Gr C provided it fulfills all requirements as per PG 10.1.2.http://files.engineering.com/getfile.aspx?folder=eeb49867-32c6-4079-9fe8-7227c3b5643e&file=Code_Interpretation_I-92-06.pdf
  10. tamal1475

    ASME Section I, PG 10.

    We have received SA 106 Gr B material with its certificate. However, as manufacturer, we want to use the same material as SA 106 Gr C for an ASME Section I job, provided all specification requirements as per SA 106 Gr C are fulfilled, as demanded by PG 10. Is there a code interpretation that...
  11. tamal1475

    Compliance to ISO 3834-2

    Does any body has experience of demonstrating compliance to ISO 3834-2 using ASME Section 1 as the application standard along with its supporting standards?
  12. tamal1475

    Stainless steel cone fabrication

    We are preparing fabrication drawing of a stainless steel cone which will become the bottom of a coal silo. The available SS 10 mm thick plate width is only 1500 mm. Minimum width required to eliminate joints is 3000 mm. Two options are being considered. 1. By making number of petals and...
  13. tamal1475

    Flow nozzle in B31.1 steam piping

    Is it necessary that the flow nozzles that are butt welded to steam piping made to ASME B 31.1, need to have code stamp? Basically it is a pipe with a conical contoured nozzle welded inside the bore to control the flow of steam. Both ends of the pipe is butt welded to steam pipes to put it...
  14. tamal1475

    WPQR test for EN 12952 boiler construction

    Is their any way we can avoid impact tests while qualifying welding procedures for EN 12952 steam boiler construction, in view of high temperature of the application? Reference standard EN 15614,Specification and qualification of welding procedures for metallic materials- Welding procedure test...
  15. tamal1475

    ASME Section IX QW 151.1 (c) and (d)

    For a 40mm thick pipe welding procedure qualification, is it allowed for a multiple specimens tensile test set, to take samples from two adjacent locations around the circumference to prepare the specimens for radially outer location and inner location with thickness 25mm each? We are finding it...

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