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  1. napster385

    Pipe Elbow to Flange Connection

    Hi Everyone, Is there a provision in the ASME Piping codes that restricts welding of welding neck flange connection directly to a pipe elbow fittings? If there is none, will this normally affect hydraulics in the pipeline system. Appreciate your response. Thanks.
  2. napster385

    Flame Cutting to remove temporary attachments

    Hi Everyone, Is there a provision in the ASME VIII code that prohibits flame cutting as a procedure to remove welding connecting the temporary attachments such as lifting lugs to the shell or head plate of a pressure vessel? Appreciate any response. Thanks.
  3. napster385

    Rewelding of Existing Weld Joints

    Thank you very much for your valuable response. The material we are using is ASTM A36 plate 10mm thick. Do you also have reference for ASME VIII Div.1 pressure vessel? What is the requirement for ASME VIII Div.1 for the same conditions?
  4. napster385

    Rewelding Existing Weld Joints

    Ok. Thank you. Follow up question: What if I weld a high strength steel plate for pressure vessel application? Will there be any special requirements for rewelding? Especially if the plate thickness is over 36mm.
  5. napster385

    Rewelding Existing Weld Joints

    Thank you for your reply metengr. Does this mean that we don't need to cut off the HAZ area? We will just clean and prepare the plate edges to undergo a new welding process?
  6. napster385

    Rewelding of Existing Weld Joints

    Hi Everyone, When an API 650 tank is dismantled and relocated to a new location, can it be welded on its existing weld joints? Or is it required to cutoff the Heat Affected Zones (approx 2in) on each sides/edges of the plate before rewelding? The API 653 only states that "the existing weld...
  7. napster385

    Rewelding Existing Weld Joints

    Hi Everyone, When an API 650 tank is dismantled and relocated to a new location, can it be welded on its existing weld joints? Or is it required to cutoff the Heat Affected Zones (approx 2in) on each sides/edges of the plate before rewelding? The API 653 only states that "the existing weld...
  8. napster385

    Welding Procedure for SA 724 Gr.C

    Hi Everyone, I would like to ask assistance on developing WPS for butt welding of SA 724 Gr.C plate 38mm thick using FCAW Process. Are there any resources you can give to study the welding and cutting process and essential/critical variables to be considered? Thanks
  9. napster385

    Chromium on A36 Structural Plate

    Thank you for your responses Swall and Mrfailure. I will be asking for actual content of their previously manufactured steel which should be also indicated in the mill certificates. But what are the other factors I can be concerned for adding an additional alloy aside from weldability?
  10. napster385

    Chromium on A36 Structural Plate

    Hi Swall, The chemical analysis provided by mill for A36Cr plate are as follows: C - less than or equal to 0.21% Si - less than or equal to 0.35% Mn - less than or equal to 1.20% P - less than or equal to 0.035% S - less than or equal to 0.035% Cr - greater than or equal to 0.30% Appreciate...
  11. napster385

    Chromium on A36 Structural Plate

    Hi Everyone, Just want to ask if what is the effect of Cr on A36 Plate if the percentage content is 0.30%. Generally what is the effect of Cr on carbon steel and will it affect the weldability of A36 plate? Appreciate your comments and advice. Thanks
  12. napster385

    SA 517 Gr.F MDMT

    Hello Everyone, I would like to ask the Minimum Design Metal Temperature allowed by ASME VIII Div.1 for SA 517 Gr.F material. I have read Part UHT and UCS to find some answers. Will UCS 66 apply to SA 517 and under what group? Appreciate your comments.
  13. napster385

    Double Wall Tanks

    Hi Everyone, Is there provision on the standards like NFPA,API or UL that permits fabrication of double wall tanks in lieu to construction of bundwall or containment wall in a tank farm? Tank is aboveground, horizontal with 55,000 liters capacity. Appreciate your comments. Thanks
  14. napster385

    FEA software for pressure vessel

    I will be analyzing an ASME VIII Div.1 Vessel for LPG storage in mounded installation. I want to use FEA to further analyze the vessel in certain conditions which is not covered by the design rules of ASME VIII. I have researched that Solidworks Simulation can do this. I just want to know if...
  15. napster385

    FEA software for pressure vessel

    Hi everyone, What is the most common used software for FEA of pressure vessels? And what is the best? Appreciate any assistance.
  16. napster385

    Plumbness test equipment

    Hello Everyone! What is the latest technology for measuring plumbness of a field erected vertical storage tank? Is there a laser type equipment approved by standards to determine plumbness of a vertical storage tank?
  17. napster385

    Intermediate Wind Girder

    Hi Everyone, Is installation of intermediate wind girder on inside of tank permitted by API 650?
  18. napster385

    LPG ullage requirement for Pressure Vessels

    Hi everyone, Is there any code requirements for ullage of LPG storage in pressure vessels? Is above 85% liquid LPG volume content for a aboveground pressure vessel permitted? Thanks
  19. napster385

    Carbon steel corrosion rate

    Thank you for your comments. Where can i find the design corrosion rate for specific services for my reference?
  20. napster385

    Carbon steel corrosion rate

    For carbon steel materials, what is the commonly used value for corrosion rate to determine remaining life of vessel or tank in number of years? The vessel is located in terminal approximately 1 kilometer from the seashore.

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