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Gentlemen, I should explain that my main concern was the effects of a continuous flow of nitrogen at 5 barg being suddenly introduced into a tank containing gasoline. (Hence the "large bubble") The line is 12"NB and the tank is 7.5 metres diameter by 6.0 metres high. There is a "floating"...

I am interested in determining the effect of injecting nitrogen at 5 barg into the bottom of a gasoline storage tank at atmospheric pressure. I would like to determine if the "shock" of this gas would cause a significant wave(s) at the liquid surface.

Gentlemen, This furnace manifold was external to the furnace and there was a dissimilar weld connecting the tubes. However, the welds were sited away from the manifold connection and did not exhibit cracking. The reason I thought elastic follow-up was the reason for the cracking was that elastic...

The material is ASTM A335 P11 operating at 15 barg and 500 Deg.C. All the PWHT specified was carried out. The cracking is in an area of stress concentration where a manifold is connected to furnace tubes.The central question is concerned with "damage" caused by thermal cycling of the piping...

I am interested in obtaining a design method for analysing the problem of "elastic follow-up" in high temperature piping. An elastic analysis shows the thermal displacement stresses and sustained stresses to be well within the B31.3 allowable. However, cracking has occured in certain regions and...