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  • Users: mrpsi
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  1. mrpsi

    Qualifying A4-70 bolt per ASME B31.3

    Hello, I need to qualify a Stainless Steel A4-70 bolt (size M10) per ASME B31.3. Per ISO3506-1, it is described as "Soft or Work Hardened" in Figure 1. Per ISO3506-1 Table 2, Tensile (UTS) = 700 MPa = 101.5 KSI & Yield(YS) = 450 MPa = 65.3 KSI Question: how do we know whether it qualifies...
  2. mrpsi

    Lap Joint dimensions >24in ?

    Hello, Are there any published Standards or "industry practices" that govern the size of laps (stub-ends) for large diameter (>24") lap joint flanges. ASME B16.9 covers pipe sizes up to 24", but beyond that I can't find any guidance other than extrapolating the B16.9 sizes. I'm running...

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