Recent content by Hansito

Dear colleagues, After years using a different Piping Stress program we are using Caesar II for Piping Stress again. We are using version 5.10 with upgrade to 5.10 build 9. When we try to get reports in the MSword the macro starts a infinite loop and get blocked. Something similar happens if...

Thanks John, You are certainly right. I'm not an expert in materials, I set a lot of searches on the 5L-X70 and there is nothing. May be is the clasical old computer definition of no more 6 strings for a variable name. Thanks Hansito

Thanks for all you valuable answers: Balllbearing: our client insists in keep (hydrotastic test)on the line list, however he approved the structure designed for empty pipe. I say that is dangerous to keep this indication on line list can promote a desaster on site, because anyone (like me who...

Colleagues, My stress program under B31.8 has as one of the piping material the option 5LX-70 with Yield 48263.3 N/cm2 and Ultimate 56537.02 N/cm2. If I change the applicable coade to B31.3 (there is an internal controversy about the applicable code on this project) the only similar option is...

Dear colleagues, I've searched for "large diameter test" and couldn't find a similar situation to the following: 60 inch Flare line Design code B31.3. Design pressure 10 barg, Design Temperature 300 C. Strutures are designd for empty pipe. The Client is affraid about pneumatic testing. The...

Thanks Pennpiper, My concern is just for the lines with design temperature below the SteamOut temperature, say lines with Design Temperature = 80 C for example, being "steamed" at 160 C. We may even have some cases of lines with design temperature nearly ambient being "steamed". Under my...

Please, Could anybody describe me how is the SteamOut operation normally done in refineries? I'm asking under a Piping Stress point of view. It is easy to run a calculation with the steam out condition, the main problem occurs regarding to existing systems, that may be too conservative. I...

Dear colleagues, We are evaluating a new revamping project with several cases of temperature and pressure increasing. Thinking about the impact I've thinking about some steps to confirm the possibility. Please if you have a different opinion or something to add let me know. Regards, Hansito 1)...

Thanks BigInch. Your answer added a very nice graphic and description to the previous valuable Thread answers. The combination Graphic-description is always very good and demands big effort, as the combination wisdom-humility. Regards, Hansito

Thanks DSB123 We are doing a simple "static" analysis with dynamic load factor 2. I'm not in the office at this moment, so I don't remember the formula exactly but is a function of Flow, molecular weight and temperature. On that conditions I think the points are B & D. I agree during the...

Dear Coleagues: We have a little controversy at office reggarding to where to model the discharge load in a piping stress model. In my opinion it should be modeled at elbows, points B and D (please see my sketches) with dir arrow as indicated. Some people say that should be points A and D...

Thanks biginch

Thanks everybody for the answers. Regarding to questions: The code is B31.3. I forgot to mention, in fact, the main concern is water from liquid to solid expanding inside the piping. Regarding to calculation done. We have made all the normal calculation, but the models do no...

Thank you both very much for your response. I appreciated them. Regards, Hansito

Dear colleagues: In my present project we are installing a set of 3 alternative compresors. They must be at one side of a pipe rack and we have some controversial opinions among the group: Some (like me) have the opinion that the best option is locate the compresors axis perpendicular to the...