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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

    Hi Alireza Moein, thanks for guidance. I see like in Section I PG-9, you can find the same on Section VIII div 1 UG-4. As per the same assumption, since material is adopted by ASME II-D it can be used for such limitations and restrictions as described. Check the ASME II-D table 1A, if material...
  4. lgracio

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

    Many thanks to you both weldstan and XL83NL. You both are having the same interpretations as I did, I just want to make sure I'm doing right interpretation. The boiler is not requiring ASME stamp, but in other side is requiring CE Marking (ASME+PED) at the site construction/commissioning. In...
  5. 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...
  6. lgracio

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

    Hi Weldstan, Not clear for me, maybe because is not my native language. Mn max is 1,35% but is reference to increment above 1,06% or is the substitute of 1,06% whenever the carbon is lower than 0,35%? LPSG-Engineering Solutions Mechanical Engineer Portugal-Setubal
  7. 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...
  8. lgracio

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

    Hi everybody, many thanks for your clarifications and sharing your experiences. It is also my opinion that any stamp marking over inner surface will create an increasing of stress concentrations and is going to have a negative effect on fatigue life. We had some situations with Heat-Exchangers...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. lgracio

    European Constructor in USA

    Is it possible to CE mark lifting-frame structures designed by AISC code? Lufs Grßcio Mechanical Engineer (Engineering Solutions) Portugal-Set·bal
  15. lgracio

    BENDING OF FINNED TUBES OVER FIN

    The finned tubes are carbon steel material, in a spiral strip finning machine wrapped around the bare tube (High Frequency Electric Resistance Welded Finned Tubes). Due to conditions of boiler performance the client wants to have the same as designed, so wants fins on the bends. Do you know...
  16. 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...
  17. 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...
  18. lgracio

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

    Greats to all of you. It was a good help. Thanks a lot. Merry Christmas. Luís Grácio Mechanical Engineer (Engineering Solutions) Portugal-Setúbal
  19. lgracio

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

    Hi, Material Selection: - Flange ASME B16.5, Welding Neck Flange, 6", 150# SCH40, SA-105 - Gasket ASMEB16.20, Spiral Wound Gasket - "CG" Flexitallic Style 6", 150#, Carbon Steel Rings with flexicarb filler - Stud Bolts ASME B16.5, Stud Bolt 6"x150# Flange, 3/4", 4" LG (Set of 8), SA-193-B7...
  20. 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...

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