AppBul Transient Pipe Stress Analysis - Sunrise-sys
PIPENET Leading the Way in Fluid Flow Analysis Application Bulletin PIPENET Transient Module PIPENET Transient Module and Pipe Stress Analysis INTRODUCTION One of the many unique features of PIPENET Transient module is its ability to calculate hydraulic transient forces. Transient flow in piping systems such as pressure surge and water hammer can cause both high pressures and high forces. Hydraulic transient forces can be both large and they could be oscillating. In many cases the potential for piping systems to get damaged is more likely because of unbalanced hydraulic transient forces than because of simply high pressures. Unbalanced hydraulic transient forces can create unacceptably large reaction forces on pipe supports, vibrations in the piping system and unacceptably high stresses in the pipes. For example, the main steam line in a power station, both thermal and nuclear, can experience unbalanced forces of around 200,000 Newtons. Special pipe restraints need to be designed to withstand such high forces MAIN STEAM LINE OF A POWER STATION In this example we consider the unbalanced forces which can occur in the main steam line when there is a turbine trip and the turbine isolation valves close quickly in 0.2 second. The PIPENET schematic drawing is shown below. Force F1 Force F2 1 of 5
PIPENET Leading the Way in Fluid Flow Analysis The graphs of the extremely high unbalanced forces F1 and F2 can be seen below. INTERFACE WITH PIPE STRESS ANALYSIS PROGRAMS Typically users of pipe stress analysis programs also use PIPENET Transient module. High stresses in piping systems, vibrations and movements can occur because of hydraulic transient forces. One of the powerful and important features of PIPENET Transient module is its capability of calculating the force-time history under hydraulic transient conditions. PIPENET can generate a force-time history file. Pipe stress analysis programs can import this file and perform pipe stress analysis and related calculations. PIPENET Schematic drawing: 2 of 5
PIPENET Leading the Way in Fluid Flow Analysis In the above schematic FP/100, FP/101 and FP/102 are the hydraulic transient forces which need to be calculated. PIPENET graphical display of force-time history: PIPENET force-time history file: Time, sec .490280E 2 .490960E 2 .491640E 2 .492320E 2 .493000E 2 .493680E 2 .494360E 2 .495040E 2 .495720E 2 .496400E 2 .497080E 2 .497760E 2 .498440E 2 .499120E 2 .499800E 2 .500480E 2 .501160E 2 .501840E 2 .502520E 2 .503200E 2 .503880E 2 .504560E 2 .505240E 2 .505920E 2 .506600E 2 .507280E 2 .507960E 2 .508640E 2 .509320E 2 .510000E 2 .510680E 2 Force, N 92.0075 92.6033 94.8967 98.8628 104.512 111.991 121.427 132.911 149.763 231.246 387.048 539.206 623.446 622.043 626.663 660.159 692.531 704.158 697.569 686.454 677.987 674.642 686.669 710.677 736.535 754.093 760.038 756.395 747.820 740.780 740.446 3 of 5
PIPENET Leading the Way in Fluid Flow Analysis Caesar Screenshots: For illustration purposes the screen shots from Caesar II are shown below. The principles can be used with any pipe stress analysis programs. 4 of 5
PIPENET Leading the Way in Fluid Flow Analysis CONCLUSION Calculating hydraulic transient forces is one of the powerful capabilities of PIPENET Transient Module. PIPENET generates a force-time history file which can be imported into pipe stress analysis programmes, where further related calculations can be performed. For this reason, users of pipe stress analysis programs also typically use PIPENET Transient module. If you have any questions about this case study, or any other of PIPENET’s capabilities, please email us at Pipenet@sunrise-sys.com. Sunrise Systems Limited Sunrise Business Park Ely Road Waterbeach Cambridge CB25 9QZ United Kingdom Email: Pipenet@sunrise-sys.com Web Site: www.sunrise-sys.com 5 of 5
Typically users of pipe stress analysis programs also use PIPENET Transient module. High stresses in piping systems, vibrations and movements can occur because of hydraulic transient forces. One of the powerful and important features of PIPENET Transient module is its capability of calculating the force-time history under hydraulic transient .
steady state response, that is (6.1) The transient response is present in the short period of time immediately after the system is turned on. If the system is asymptotically stable, the transient response disappears, which theoretically can be recorded as "! (6.2) However, if the system is unstable, the transient response will increase veryFile Size: 306KBPage Count: 29Explore furtherSteady State vs. Transient State in System Design and .resources.pcb.cadence.comTransient and Steady State Response in a Control System .www.electrical4u.comConcept of Transient State and Steady State - Electrical .electricalbaba.comChapter 5 Transient Analysis - CAUcau.ac.krTransient Response First and Second Order System .electricalacademia.comRecommended to you b
Basic Pipe Stress Analysis Tutorial Good, relevant and non-overwhelming technical information on pipe stress analysis is hard to come by. So, we decided to provide a simple tutorial on the basics of piping stress analysis. This tutorial is directed towards newcomers to Pipe Stress Analysis just as much as to engineers new to CAEPIPE.
Design.4 PE Pipe Systems PE Pipe Systems PE Pipe Systems PE Pipe Systems PE Pipe Systems PE Pipe Systems PE Pipe Systems design Pipe Dimensions Table 4.2 PE Pipe Dimensions AS/NZS 4130 Nominal Size DN SDR 41 SDR 33 SDR 26 SDR 21 SDR 17 SDR 13.6 SDR 11 SDR 9 SDR 7.4 Min. Wall Thickness (mm) Mean I.D. (mm) Min. Wall Thickness (mm) Mean I.D. (mm)
Road crossing with casing pipe Carbon Steel and FRP, carrier pipe pre-insulated Carbon Steel and FRP. TECHNICAL DESCRIPTION Carrier Pipe: Carbon Steel, FRP Size of Carrier Pipe: DN 1200mm CS pipe - DN 750mm FRP pipe (pre-insulated) Casing Pipe: FRP Size of Casing Pipe: FRP casing pipe I.D. 1520mm, FRP casing pipe size I.D.
1. CUT THE PIPE Cut the pipe using a pipe cutter, making a perpendicular cut and cleaning the pipe end from grease and pipe chips. Fit the plastic ring on the pipe and make sure the pipe is flushed with the upper edge of the ring. 2. PLACE THE RING OVER THE PIPE Insert the pipe into the ring until the pipe reaches the safety stop which exists
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Transient and Steady-State Response Analysis 4.1 Transient Response and Steady-State Response The time response of a control system consists of two parts: the transient response and the steady-state response. By transient response, we mean t
Cambridge IGCSE and O Level Accounting 1.4 The statement of financial position The accounting equation may be shown in the form of a statement of financial posi
