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  1. doses

    Differences between A335 P11 and A335 P22

    Mr. Breen, about Note 72, could you please tell us why carbon content of weld metal has to be >0.05%? Thanks. D. Oses
  2. doses

    OD dimension of ASME B16.25

    Hi, Looking ASME B16.25 I noticed that in Table 1 are specified two column for outside diameter (A) of welding ends. One is for cast components and other is for wrought components. Can anyone tell me why OD for welding ends is bigger for cast components than for wrought components? Thanks for...
  3. doses

    Does ASME B31.3 allow subsitution of API flanges?

    If piping design is under ASME B31.3 and pressure is over class 2500 (ASME B16.5) may be you should use "High Pressure Piping" (Chapter IX) rules.
  4. doses

    ASTM 1045 Weldable?

    Hi, Just one question, Are we talking about a ASTM 1045 or AISI/SAE 1045 steel? Since the piece is an axle, I assume a AISI 1045 steel as base material.
  5. doses

    What does rating 3000,6000,9000 means as per ASME B 16.11

    Thanks a lot Mr. Breen for your post, that's why I always keep comming back to read this forum. Even I'm a young engineer, I've seen many mistakes and misunderstandings relating to class designations of fittings, valves, etc. As an example, few days ago I had a discussion with another engineer...
  6. doses

    Welding P91 Thermal Power Plant

    Hi, again: Stanweld: I have seen some industries and manufacture processes (My previous job was performing welding inspection and NDT, PT and MT mainly). But, I had never seen how fittings are made. ¿how is a wye made? ¿Can you describe the process in a simple way?. By the way, if my questions...
  7. doses

    Welding P91 Thermal Power Plant

    Davefitz and unclesyd: Thanks for the answers. I download the articles above, and I have added all the requierments mentioned to the specification of wye fittings in the project. I undestood why Ni+Mn are so important fo temper temperature. As they are "gammagenos" (I don´t know the english...
  8. doses

    Welding P91 Thermal Power Plant

    Hello: First post that I do here and I'm not english native speaker, so if my language is not precise, please be patient. I'm a mechanical engineer working on the design of piping (engineering stage) of a Thermal Power Plant (Vapor Turbine). I have to make specification for design and...

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