I have questions regarding PWHT on ASME B31.4 piping welding
"434.8.9 Stress Relieving (a) Welds shall be stress relieved when the effective weld throat (see Fig. 434.8.6-2) exceeds 1 1/4 in. (32 mm)..."
But there is another clause:
"The thickness to be used to determine the stress-relieving...
I am working on a thermal expansion estimate of the nozzles on a cylinder vessel for the purpose of piping stress analysis.
Could you please give me some advice or referecne materials to calculate the thermal movement of the nozzles on a vessel.
I appreciate your help greatly!
I got a vendor drawing from Germany. The pump outlet marks with "ZX-M 200, 8"". I know the pump nozzle is 200 mm (8"). But I am not sure the connection type (flanged, welded or grooved), and what the meaning of ZX is.
Any advice will be appreciated greatly!
Hi, all,
I am working on a suction gas duct (thin wall big size CS duct) with negative internal pressure. and wondering how to calculate the minimum duct wall thickness to avoid collapse? I searched the ASME B31.3. The code only gives minimum required pipe wall thickness due to positive internal...
I am working on expansion loop design for a mining project. after I calculated the thermal expansion of the whole pipeline, I met the problem of sizing and spacing the Eloops.
I have used the method introduced in Design of Piping System by M.W.Kellogg to decide the dimension of the Eloops. And...
Hi,
I am working on a 3 km tailing pipeline design for a mining operation. An anchor block is added to the end of the tailing pipeline near the pumphouse. PE asked me if we need another anchor block on the pieline near the tailing pond.
My understanding:
1. With another anchor block:
We will...
