During a walkthrough on a job we recently completed (at an idustrial site), the local official requested that an overhead 6" natural gas pipe be labeled every five feet stating that the line was NG and the operating pressure.
That seemed a little excessive to us, especially the operating...
API 521 Section A.5.2.1 gives an equation for discharge area. For the F' term, "The recommended minimum value of F' is 0.01; when the minimum value is unknown, F'=0.45." What does that mean? I can calculate F' from the given equation, however I get a non-real result because T1 is greater than...
From my reading of API 520 for fire contingency, it seems that regardless of relief valve set pressure, the value for P1 (relieving pressure) used in the calculations is MAWP + allowable overpressure + 14.7 psia. I'm using Table 5 as the example here. MAWP is 100 psig, set is 90 psig...
I'm sizing PSV's for fire case on two heat exchangers located near an upstream vessel for which a PSV exists (isolation valves are installed in connected piping). By inspection the surface area of the heat exchangers is about two thirds of the vessel for which the PSV exists. I've been asked...
While reviewing existing equipment we came across a type of heat exchanger in use that may or may not fall under Section VIII Div 1. It is a single pass carbon tube cartride with a water cooled steel shell. The process (tube) side carries product at 1/2 to 2 psig and the shell side carries...
