By Wingate, James A
Folllowing the good fortune of his first booklet concerning Hydraulics, Pipe stream, commercial HVAC & application platforms, Mister Mech Mentor now bargains an all-new, easy-to-read choice of chapters that includes ASME Piping & strain Vessel Code purposes. Written in a pleasant type, this publication offers the fundamental merits of guideline by means of a private mentor who explains why and the way, whereas educating very likely risky classes in physics and engineering layout. Spared the embarrassment of painful error, either early-career and skilled engineers will achieve sensible wisdom from frank, colourful circumstances and learn how to remedy various mechanical difficulties, together with: Pipe rigidity & pressure Structural helps strain Vessels Jacketed Pipes Bellows-Type growth Joints method Piping
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Additional info for Applying the ASME codes : plant piping and pressure vessels
At Node 50, a constant support would enable no practical improvement over a variable spring, but in conjunction with a Node 40 elbow trunnion as above, it might afford a very slight but negligible load reduction. It would certainly not be cost-effective. In the stress program printout Pipe Stress:: Example No. 2:: page 6 of 9, we find this value of vertical fixed (rigid) support reaction force, pounds: ≅ 9,200 psi bending stress. vs. allowable material stress = 17,000 psi Just offhand, this stress level should not be a problem for the header pipe, although only a stress analysis which models all of the 16-in.
In Example #1, the value was −7,425 lb, so optimization of the spring settings had very little effect on the remaining rigid support at Node 100. In both of these schemes, the loads on the header-tobranch connection at Node 120 are about equal. The vertical force runs about 4,800 lb and the moment about the vertical axis, that is, a horizontal plane, runs a little less than 27,000 ft-lb. It is important to note that in the actual piping system, these forces and moments at Node 120 are internal to the pipe, even though the stress model calls that node an anchor.
This would let us support the pipe such that the spring force’s line of action is superimposed on the pipe’s vertical centerline below Node 40, and should reduce the moment reactions at Node 5 as a result. Of course, additional support structure would have to be made available above the new support point, adding to cost. • Use a constant effort spring instead of a variable spring hanger. At Node 50, a constant support would enable no practical improvement over a variable spring, but in conjunction with a Node 40 elbow trunnion as above, it might afford a very slight but negligible load reduction.
Applying the ASME codes : plant piping and pressure vessels by Wingate, James A