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  • Users: MFQC
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  1. MFQC

    A178 grade D finned tubes

    Dear friends Have you got any experience in production of finned tubes with HFRW(high frequency resistance welding)? In our new client spec for production of finned tubes from A178 grade D with A1008cs fin, the hardness difference between weld and HAZ shall be lower than 100vickers. With any...
  2. MFQC

    forged flat heads

    Fear friends According to ASME Sec.I PW-17 It is realized that forged flat heads shall be manufactured as forged disc and utilizing forged bar is not allowed. In addition, in code case 2697-1, there are some requirements such as reduction ratio of forged disc. I want to know if using forged...
  3. MFQC

    Crack during cold rolling of thick plate

    During rolling(cold rolling) of a 125 mm thick plate of SA-299 , plate encountered cracking which was started from the surface of the tapered edges. We usually perform beveling and tapering by the means of thermal cutting (before rolling). At the start of the crack , we could find some...
  4. MFQC

    WPB elbow tensile test

    Dear friends we perform a tensile test on a sample from a batch of A234-WPB elbow to ensure that the data in certificate has mentioned right. result for tensile and yield strengh was in the range of ASME SecII tables. But the elongation was 3% lower than the minimum requirements. As you know...
  5. MFQC

    Plate manufacturing process

    Hi Do you know what are the differences in production of EN structural materials such as S355 and ASME SA516 grade 70? If they are both produced in one manufacturer , what additional requirements are met for producing SA 516? According to ASME SecVIII Div1 UCS-23 we are not allowed to use S355...
  6. MFQC

    Crack in forming of A240-304l dished head

    Dear friends As you know minimum tensile of A240-304l is 485Mpa ,its yield is 170Mpa and minimum elongation is 40%. We purchased a plate with the below specifications for dished head and the dished head has 2 weld lines. Tensile:779Mpa Yield: 584Mpa Elongation :46% Our process for production of...
  7. MFQC

    WP11 hardness

    Hi In portable hardness test of a 28 inch WP11 tee we had some problem. As standards mentioned, before testing we should remove all oxides ,paint,..... We prepare surface with a grinder till we visually see bright mirror like surface. The result of hardness test was 215 brinnel. We checked the...

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