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Thanks for the replies. Useful stuff. * Okay, so it seems that drying the insulation is a long shot - and yes, you've made a good point, even if dried, the insulation would still be damaged, at least where the ice is. * I'm not too worried about CUI, still have to do my due diligence and...

Hey guys, I thought I may pick your brains on this sticky issue. Background: 19 m tall, 2 m ID, insulated trayed column. Operates at a steady -70 degC with rare trips to -10 degC. A couple of months ago ice started forming around several locations of the column and associated piping. This has...

This might be a silly idea, but would it be possible just to cool the sample using N2 and wait for it to absorb heat until it reaches specified test temperature? Keep track of T with a pyrometer or some other way. I mean, the material would mostly recover it mechanical properties after it...

Hello, Thanks for your answer BigInch, I failed to mention that these pipes have a very thick wall, so barlow's formula can't apply as it's only accurate when the wall thickness is supposed a membrane. Actually I'm just trying to interpret the following text, so I know how these people...

Oh, I'm not designing, this is for inspection purposes only. This pipelines are old and were custom made, information is scarce. The specification do say minimum wall thickness must be calculated using that "mean diameter formula". The only additional information is that weird example I can't...

Hello Everyone, I'm trying to calculate the minimum wall thickness for specially manufactured high pressure pipelines using the "mean diameter formula" (according to manufacturer specs), which to my knowledge is: Bursting Pressure = 2(Ultimate Tensile Strength)(OD-ID)/(OD+ID) The thing is...

DSB, Thanks for your prompt reply. Indeed it handles very high pressures, up to 21 ksi. I'm interested in finding out, primarily, how were the retiring minimum wall thicknesses calculated. I do have some spec. from ICI; but they were not very well kept through the years and this particular...

Hello Everyone, I was wondering if anyone knows of a 'British Standard' design, construction, examination and testing code for pressure piping, which might be or have been an equivalent of ASME B31.3. I'm looking at a high pressure piping system built by the british ICI 25 years ago. Any...