Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. Jezovuk

    Heating with water

    Thank you LittleInch, Yes, i presumed that the start temperature of the paint (31.1 lit. and 2,1 kJ/kg*K) is equal to the ambient temperature = 20 °C. Water (19,9 lit.) is constantly kept at 50 °C by means of external heat exchanger. I also presumed that the p.vessel is 100 % insulated (heat...
  2. Jezovuk

    Heating with water

    Hello everyone! I would appreciate if someone could help me with the calculation of pressure vessel heating. We have a pressure vessel V1= 31,1 Liter and our task is to heat the Working fluid with water. PV is insulated and we don´t take losses into consideration. We need to know how long does...
  3. Jezovuk

    AD2000 (or EN 13445)- Positions of longitudinal seams

    Hallo! My company produced a pressure vessel according to AD2000 German PV Code and today the vessel was inspected by TüV inspector. It looks like a serious error and oversight occurred during production process so that inner- shells longitudinal seam was aligned with heating- jackets...
  4. Jezovuk

    Eccentric cone with angle 45° (ASME VIII-1)

    Thank you prex! It is a solid element. How can i now detemine bending stress at the transition? (i am using solidworks simulation) Maybe u have some example? Is this an answer: http://help.solidworks.com/2014/English/SolidWorks/cworks/t_linearizing_Stress_Results.htm ?
  5. Jezovuk

    Eccentric cone with angle 45° (ASME VIII-1)

    How would u interpret this result of FEA? Conditions: Material: X5CrNi18-10 (1.4301) External loads: Inner pressure: 5bar Temperature: 50 °C Fixed geometry: upper surface of cylindrical shell Criterion: Von Mises In order to avoid any peak stress in transition area between cone and cylinder i...
  6. Jezovuk

    Eccentric cone with angle 45° (ASME VIII-1)

    Thank you prex! Yes, u are right, U-1(e)(3) is clear. I have a pressure retaining cover (item 2) so it must be included, together with attaching "like a bolt" (item 3) and "like a nut" (item 1).
  7. Jezovuk

    Eccentric cone with angle 45° (ASME VIII-1)

    Anyone? I have one more question regarding the same vessel. If the "End of scope" is marked like on the picture, does the Positions 1, 2, 3 have to be made from ASME Materials or are they out? What is the correct way in this case to interpret U-1 (e) (1) (-d)? Or there is some other rule that...
  8. Jezovuk

    PED- Allowable pressure dropp (pressure loss)

    Hallo racookpe1978! Thank you for usefull tips! We didn´t fill the vessel with water, we just made a pressure test with air. I think that our problem is the O-ring. The O-ring we use now is encapsulated FEP O- ring which is very hard and thus can not be commpressed enough because our lid is...
  9. Jezovuk

    PED- Allowable pressure dropp (pressure loss)

    Thank you for your answers! XL83NL- The design code is German PV Code: AD2000 EmmanuelTop- "During the proof test no leaks are permitted from the pressure envelope". - I was hoping to find something similar in AD2000 but i didn´t have any luck. :)
  10. Jezovuk

    PED- Allowable pressure dropp (pressure loss)

    Hallo to everyone! I would like to hear an expert opinion about permissible pressure loss according to PED 97/23? We tested a vessel (V=20L) with O-ring at a pressure of P1= 5 bar and after 2 hours the pressure drop was 2 bar (P2=3bar). I just can´t find a reference in Pressure equipment...
  11. Jezovuk

    Groove dimension for Internal and External pressure (Vaccum)

    Compositepro, thank You for your answer! That means that for example for O-ring ø188x4 (188- internal diameter) i need a groove ø196/ ø188? (with standard depth) I am asking that because every O-ring manufacturer recommended that a groove should not be filled more than 85% or significant damage...
  12. Jezovuk

    Groove dimension for Internal and External pressure (Vaccum)

    Maybe O-ring is not the best solution when dealing with both vacuum and internal pressure? Did anyone had a similar problem?
  13. Jezovuk

    Eccentric cone with angle 45° (ASME VIII-1)

    Hello to all, I have a little problem with one pressure vessel with eccentric cone. (α~45°- see the attached picture) In UG-32 (g)(2) stands that angle should not be larger than 30°. However, 1-5 (g) say that junctions with angle grater than 30° are allowed but only if design is based on...
  14. Jezovuk

    Groove dimension for Internal and External pressure (Vaccum)

    Yes, i use O-rings.
  15. Jezovuk

    Groove dimension for Internal and External pressure (Vaccum)

    Hello! I'm constructing a pressure vessel which is intended to work with both- internal pressure (4 bara) and vacuum (~0,2 bara)- (not simultaneously of course). The vessel have normal flange and cover (static- axial sealing). When i look at the catalogs, manufacturers always separate internal...
  16. Jezovuk

    Buffer tank sizing

    N stands for normal conditions. http://www.eng-tips.com/viewthread.cfm?qid=97506
  17. Jezovuk

    Buffer tank sizing

    Maybe this can clear some doubts? p1=15 bar p2=10 bar p1xV1=p2xV2 V2=1,5xV1 V2-V1=4Nm3/minx10min=40 Nm3 1,5xV1-V1=40 Nm3 0,5xV1=40 Nm3 V1=80 Nm3 V2=1,5xV1=120 Nm3 V2r= 120 x 1,01325/16,01325 = 7,59 m3
  18. Jezovuk

    Buffer tank sizing

    Yes, ok, i agree. So i must use 8000 [L] tank? Diameter for example 1,8 m and length 3 m.
  19. Jezovuk

    Buffer tank sizing

    But my flow is not massflow, it is volumetric flow- 4 [Nm3/min]. And C is the book is also in Sm3/ hr.
  20. Jezovuk

    Buffer tank sizing

    I think there are many of us here. :) I have one more question, when i calculate the volume of the tank i get 8,1 m3. Is this volume expressed in Nm3 or in m3 (working conditions)? In other word, do i have to divide 8,1 m3 with 10 bar and get volume of 0,8 m3 (800 lit)?

Part and Inventory Search

Back
Top