Search results for query: *

Big thanks for you BigInch; I got your explannations. However still can't understand followings: 1) When crossing hills or dunes, is there any requirement regarding the trench profile? I think we can't cross hills and dunes just by laying down the pipeline in the trench. I think we have to...

More explanation and advices, please.

Dears; This time I attached some sketchs and photo to let you understand better my concern.http://files.engineering.com/getfile.aspx?folder=c995be05-ac2f-411b-803e-0b677410108e&file=Attachment.pdf

Dear Specialists; It's me again and I'm still with UHB problem. Finally I could find some formulas to check if UHB phenomena will occur or not in a pipeline for given conditions. Some calculations are based on OTC Paper 6335 by A.C.Palmer. In this paper, the required down load, Wi, to prevent...

Dears; I have to weld a weldoloet on a small piece of pipe. This small piece of pipe is buttwelded to 02 weldneck flanges from each side. I would like to know the minimum distance that I have to provide from the weld (buttweld between pipe and WN flange) to the fillet weld (of the weldolet on...

rconner; Sorry I don't have such information;

Many thanks DSB123; Standards calculation for determination of coverage requirments for overbends is exactly what I'm looking for. Do you have these standards calculations? Do you know the folmulas? Do you have any doc to share? Do you thinks that the calculation will require software juste or...

Dears; Could you please explain the use of these different pigs: a)Brush pig: b) Gauging pig c) Cup Pig d) Foam Pig Many thanks

Thank you a lot; After investigations it came out that this UHB problem occurred near a summit of sand dune. In the attached file you can see the location where this problem occurred. Design and Service conditions of this pipeline are as follows: Design Pressure = 371 barg. Design Temperature...

Thanks Rneil; 1) What do you mean by ''Problem at Overbends''? Is it different from upheaval buckling? 2) Do you think that your third solution (providing deeper burial) will not require cutting the pipe? Many thanks

Dear Specialist; I’m facing a problem of upheaval buckling of a gas injection buried pipeline. Originally the pipeline was buried 1meter below the ground (01 meter from ground to the top of the 10” pipeline). As you can see in the attached photo, due to thermal expansion, the pipeline is coming...

No body answered me until now...

The question was raised by me on that forum, but no answer Thank u

Thanks too much Rneill...Your advices are very helpfull... I got few pages of new version of API602 and I confirm what you said above. I'll request our QA/QC manager to buy new version of this code. You didn’t say anything about British Standard BS5352, why?

Many thanks Rneill; But are you sure that API602 covers globe valves? API 602 that I have is titled "Compact Steel Gate Valves-Flanged, threaded, Welding and Extended Body Ends" and in the “Scope” paragraph it is speaks only about gate valves. I don't know if it not allowed attaching Vendor...

Rneill; Thank u. The applicable code for the piping system is B31.3. The valve shall be Hub ended not butt welded and Hubs shall be exclusively Galperti type (client requirement). I checked B31.3 code and I didn't find any British standard for valves inside this code. Under such result shall...

Dears Specialist; I have to purchase a 1" Globe Valve, 450 Bars Hub ended, designed to 450 bar for (-35°C to 170°C), RB, OS & Y, Press Seal Bonnet, Metal Seated. I have to dictate to Suppliers which standard is applicable but I don't have any idea. I know that face to face dimension of such...

Thanks Leonard; I need your advice concerning modeling of above ground pipeline. What is the best way to model above ground pipelines continuously in contact with soil? Is it by providing supports with short span or by using Buried modeler included in Caesar II. In case we use Buried Modeler...

Good Morning every one; Could someone indicate me where can I find specialists of stress analysis using Caesar ?

Many thanks to Rneill and Smith