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  • Users: Stileman
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  1. Stileman

    Vacuum Degassing Process for seamless pipes, forgings and castings

    Dear sirs, I kindly ask you about the following issue. I premise, I'm in an HIC environment, NACE MR0103 applicable. My Client requires all piping (seamless pipes, forgings, castings) to be manufactured during steel making with the Vacuum Degassing Process (aimed to lower Hydrogen content to...
  2. Stileman

    Plate Normalized + Pipe Normalized = 2 Normalization on same pipe?

    Dear Sirs, I'm talking about a Client Specification that requires an NPS 30 pipe to be manufactured as per A672 C60 Class 32 (i.e. Normalized) and, in addition, this pipe shall be made from a plate as per ASTM A516 GR60 Normalized!! Practically my Client asks for a double normalization heat...
  3. Stileman

    Adhesion Test for Silicone Painting System @ 400°C

    The issue is that my Client Painting Specification prescribes to perform an adhesion pull-off test (in accordance with ISO 4624 or analogous ASTM) on a two layers (30 microns each) Silicone Painting System. Now, chimney Vendor states that adesion test cannot be performed. What's your opinion...
  4. Stileman

    ASTM A358 Class 3 vs. Class 1

    Hello, I asked during bid phase an ASTM A358 Class 1 pipe. The Vendor offered the Class 3 instead. The only difference is that Class 1 is a double welded pipe whereas Class 3 is single welded pipe. Both pipes are 100% radiographed. Any of you see any concern to accept this deviation, namely...
  5. Stileman

    Silicon and resilience

    If in a given carbon steel, the silicon composition increases does it increase the resilience? Is there any relationship? Thank you all.
  6. Stileman

    "Y" coefficient fot Thickness calculation for B31.3

    Please, can anyone let me understand the meaning of the Y factor in ASME B31.3 para 304.1.1? I mean, for "Y" I got two choices, a choice from table 304.1.1 (t < D/6) or by a formula (t >= D/6). But, how can I know if "t" is < or > than D/6 if I still have to calculate "t"? And then, in the...
  7. Stileman

    Dual Grade

    What does it mean "dual grade" as a specification for a material requisition? My customer want me to use AISI 316/316L Dual Grade...but I didn't perfectly got the meaning. Unfortunately my colleagues too, even the material expert. Could you help me out? Thank you. Ciao from Italia! E.

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