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  • Users: lgracio
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  1. lgracio

    HEX U-Bends under external pressure

    thread794-256857 Hi all, Is it really necessary to calculate the external pressure of U-Bends? Can we assume the U-bends are self-stiffened as it is joint to the straight part of tube, so the weakest part is the straight long tube? If we use TEMA RCB-2.31 I have seen many calculator programs...
  2. lgracio

    Thermal displacement in offset nozzles on pressure vessels

    thread794-373948 Hi all, I'm searching for an analytical calculation (excel formulas) for thermal displacement in offset nozzles on cylindrical shells of horizontal pressure vessels supported by saddle supports. Could someone to support me in such guidelines to formulate this expanded...
  3. lgracio

    Use of EN material certificate on a designed ASME+PED boiler

    If a boiler is designed, manufactured and tested in accordance with ASME section I plus the PED, I am authorized to use a EN material with a material test report only properly certificated to the standard specification EN10222? According ASME-I (PG-7.2 and PG-9.1) edition 2015, the SA/EN10222-2...
  4. lgracio

    SA-234-WPC (ASME II-A) chemical composition C vs Mn interpretation

    Hi everybody, I need a help to interpret the standard ASME-II Part A (2015 Ed.) for material SA-234-WPC and table 1. Carbon max = 0,35% Manganese = 0,29% - 1,06% For the Table 1 on WPC grade the note D is stating: "For each reduction of 0.01% below the specified carbon maximum, an increase of...
  5. lgracio

    Stamping marks by low die stress stamp on inner surface of pressure parts?

    Is it allowed stamping marks by low die stress stamp on inner surface of pressure parts? For instance on plates that are going to be used on manufacturing of end plugs will be installed on both top ends of header pipes. For some reasons of fabrication process, the supplier is asking to make...
  6. lgracio

    stamping marks by low die stress stamp on inner surface of pressure parts

    Is it allowed stamping marks by low die stress stamp on inner surface of pressure parts? For instance on plates that are going to be used on manufacturing of end plugs will be installed on both top ends of header pipes. For some reasons of fabrication process, the supplier is asking to make...
  7. lgracio

    Straigthening P91 headers by cold pressing

    thread330-381311 Hi everybody. In our factory we are able to make a proof process qualification report for cold pressing of P91 headers after welding nozzles to header pipe, without a subsequent heat treatment PWHT. We know that all grade 91 components that have been welded shall not be...
  8. lgracio

    ASME temperature conversion

    Someone can guide me how to interpret and calculate the conversion of 10ºF to Celsius based on the context of ASME-I (A-393)? The value of 10ºF is in the context of a rate of cooling (temperature difference) per minute from the normalizing temperature down to 1100°F. LPSG (Engineering...
  9. lgracio

    CE mark designed structures by AISC

    Is it possible CE mark of designed structures by AISC code? The materials are according EN standards, and welding process specifications also according EN. The problem: Is a demand rule that the design of structures has to be according harmonized EN standards in order to have CE marking? Lufs...
  10. lgracio

    BENDING OF FINNED TUBES OVER FIN

    My client wants to bend the finned tubes on each top end, but the bend area contains fins. What kind of requirements and criteria should I apply? My opinion is that I should comply with "International Standard for Dimensions, Tolerances, and Tests of High Frequency Resistance Welded fins". My...
  11. lgracio

    Forming of Thermomechanical Beams - How to select Cold or Hot?

    Hi, Someone to know how to find a solution to perform bending/forming on H-BEAM HEA360 with 5881mm length and bend radius of 16161mm? How can I select the forming process? Cold or Hot? Knowing that the material is S355J2+M. Thanks for any support if available. Luís Grácio Mechanical Engineer...
  12. lgracio

    HOW TO DEFINE THE TORQUE FOR A193B7 STUDBOLTS CONSIDERING GASKET COMPRESSIBILITY?

    Hi, Someone can help me to find out how to define/calculate the tighten torque of studbolts A193-B7 considering the flanged joints as per ASME B16.5 and in between there is one gasket subject to compression? Any place/handbook where I can find some assembly guides of such bolted flanges...
  13. lgracio

    Thinning calculation of bend when pipe is purchased with MWT

    Hi, I would appreciate support for the following case. A pipe bend has to be performed for a pipe NPS 4" purchased with MWT of 17,78mm (AWT of 20,32mm). The bend radius is 305mm and the material is SA335P91. The design conditions are T=579ºC and P=19,13 MPa. I know that for thinning...
  14. lgracio

    Threadolet 9000# - What are the dimensions diference to 6000#

    Anyone can support me what are the dimensions for 9000# Threadolets and Sockolets? It's possible to see any table that show the dimensions for Threadolets? Luís Grácio Mechanical Engineer (Engineering Solutions) Portugal-Setúbal
  15. lgracio

    Micrography Analysis on Flat Products EN10028-2

    Someone could help me what is the criteria for micrography analysis 200:1 and 500:1 of a plate material according EN10028-2, 10CrMo9-10 (AD-2000 W1). Since the standard of material is not requiring this analysis, but my client want to do this, how can we evaluate the analysis? Luís Grácio...
  16. lgracio

    Nitrogen Filling Preservation Calculation

    Hi Everybody, Someone could help me solving the following problem which consists on filling a pressure vessel with nitrogen for preservation and I need to know how many nitrogen cylinders I have to purchase? The apparatus is maintained at vacuum pressure of 1,5 millibar where the nitrogen will...
  17. lgracio

    Search for a material with electrical resistance and high hardness

    Please someone could help me search for a material with good properties of wear resistant or high hardness and simultaneously with electrical resistance features. This material is to be used as a tool disc to block and guide a fin strip plate and push it against tube where is to be welded with...
  18. lgracio

    Wear Resistant and avoid electrical conductivity

    Please someone could help me search for a material with good properties of wear resistant or high hardness and simultaneously with electrical resistance features. This material is to be used as a tool disc to block and guide a fin strip plate and push it against tube where is to be welded with...
  19. lgracio

    Material Traceability on nonpressure parts

    Anyone can help me if it is required transfer the material markings (heat number & Material Grade) or perform any material traceability to the nonpressure parts if welded to a pressure part designed by ASME code Section I? The Section VIII-div1 for me is very clear, I'm interpreting is not...
  20. lgracio

    Magnetic Particle or Dye Penetrant inspection

    Anyone can help me why my client are requiring these additional tests below for raw material suppliers for pieces like Weldolets, Thredolets, Flanges and round forged bars? 1. The PMA's are not requiring these tests. Where it is applied by the ASME code? 2. If my supplier are not able to do...

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