4.5.4. A horizontal pipe 30 cm in diameter and 420 m long has a wall thickness of 1 cm. The pipe is commer- cial steel and carries water from a reservoir to a level 100 m below and discharges into the air. A rotary valve is installed at the downstream end. Calculate the maximum water hammer pressure that can be expected on the valve if it closes in a 0.5-sec period (neglect longitudinal stresses). Also determine the total (maximum) pressure the pipeline will be exposed to during the water hammer phenomenon.

4.5.4. A horizontal pipe 30 cm in diameter and 420 m long has a wall thickness of 1 cm. The pipe is commer- cial steel and carries water from a reservoir to a level 100 m below and discharges into the air. A rotary valve is installed at the downstream end. Calculate the maximum water hammer pressure that can be expected on the valve if it closes in a 0.5-sec period (neglect longitudinal stresses). Also determine the total (maximum) pressure the pipeline will be exposed to during the water hammer phenomenon.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The pressure gauges are inserted at A and B in a vertical pipe converging water. The diameters at A and B are 150mm and 75mm respectively. The point B is 2.3m below point A. When rate of flow down the pipe is 0.021m³/s. The pressure at B is 117.72 KN/m² greater than at A. The losses in pipe between A and B are expressed as(KVa²/2g) where Va is velocity of A. Find the value of K. If the pressure gauges at A and B are replaced by tubes filled with water and connectef to a u-tube containing Hg(SHg=13.6) calculate the value of the reading manometer.
... "H" hinge water A 1m 40KN 1.5m In the figure shown, find the depth of water "H" if the force at the bottom of the gate is 40KN to make the system equilibrium. The rectangular gate which is hinged at point A has a dimension of 1m depth and 1.5m width. A) 5.77 m B 6.27m 5.27 m No answer among the choices E 6.77 m
A pipe AB carries water and tapers uniformly from a diameter of 0.1 m at A to 0.2 m at B over a length of 2 m. Pressure gauges are installed at A, B and also at C, the midpoint of AB. If the pipe centerline slopes upwards from A to B at an angle of 30° and the pressures recorded at A and B are 2.0 and 2.3 bar, respectively. (1 bar = 100 kPa) Determine the flow, in m^3/s through the pipe at C neglecting all losses. (1 bar = 100 kPa). (Please round-off final answer to four decimal places) Determine the pressure in bars, recorded at C neglecting all losses. (Please round-off final answer to 2 decimal places)
4.5.4. If the pressure difference between points 1 and 2 in Figure P4.5.4 is 25 psi. What will be the flowrate? The pipes are galvanized iron with k, = 0.0005 ft. Take v = 1.06 x 10* ft/s and neglect minor losses. 2000 ft, 8 in dia 10 in dia 2. B 1600 ft, 6 in dia e 800 ft, 10 in dia- Figure P4.5.4
Assignment No. 3 Q2- The inverted U-tube manometer of Figure contains oil (SG 0.9) and water as shown. The pressure differential between pipes A and B, pA pB, is 5 kPa. Determine the differential reading h. Oit 0.2 m 0.3 m Water
Problem 2 A fire protection system is supplied from a water tower and standpipe 80ft tall. The longest pipe in the system is 600ft and is made of cast iron about 20 years old (s = 0.0017 ft). The pipe contains one gate valve (K = 0.246); other minor losses may be neglected. The pipe diameter is 4in. Determine the maximum rate of flow through this pipe. Hint: v= 1.21 x 10 ³ft²/s. h = 80 ft j CV -D=4 in. Gate valve- Lipe = 600 ft-
pls answer asap for my hydraulics course. A 30 cm diameter pipe is connected by a reducer to a 10 cm diameter pipe. Points 1 (on the 30 cm diam.) and 2 (on the 10 cm diam.) are along the same elevation. The pressure at 1 is 250 kPa. The flow is 30 liters per second and the energy lost between 1 and 2 is equivalent to 20 kPa. Compute the pressure at 2 if the liquid flowing has a specific gravity of 1.50.
Problem 2: A centrifugal pump with an overall efficiency of 0.56 rotates at 1650 rpm. The flow is purely radial at the inlet of the rotor. The pump has the following characteristics: Flow rate Inlet diameter Outlet diameter Head Width at the inlet Width at the outlet Leakage Mechanical loss Blade angle at the outlet The water density Atmospheric pressure |Q=72 L/s DI = 90 mm D2 = 280 mm H= 25m bl -20 mm b2 = 18 mm q =2 L/s Pm = 1.41 kW B2 = 35 p = 998 kg/m³ 101 kPa
3. A pump is used to transport water at the rate of 0.075 m³/s from a reservoir 20 m above the pump to a free discharge 35 m above the pump. The pressure on the intake side of the pump is 150 kPa and the pressure on the discharge side is 450 kPa. All pipes are commercial steel of 15 cm inner diameter. Determine (a) The head supplied by the pump (b) The total head loss between the pump discharge and point of free discharge. Z₁=20 m 1 P₂ = 150 kPa 2 面 3 D=15 cm A P3=450 kPa 4 Free Discharge Z4 = 35 m
Solve for the water discharges in cach steel pipe as shown in Figure 3. You may assume that the minor losses (entrance, exit & bend losses) are negligible. Two trials are enough for this exam. -Elevation 35 m Pipe 1: D-0.2m, L=2400m, f=0.020 Elevation 30 m Elevated tank A -Elevation 28 m Elevated tank B Reservoir C Pipe 3: D=0.15m, L=1500m, f=0.020 Pipe 2: D=0.2m, L=2400m, f=0.020 -Elevation 10 m Figure 3
What is pipe roughness? A pump is located 5 m above the surface = 8170 M/m¹) in a closed tank. The pressure in the space above liquid surface is 35 Kpa. The suction line to the pump is 15 m of 15 cm diameter pipe (/= 0.025). The discharge from the pump is 60 m of 20 cm diameter pipe (/= 0.03). The pipe discharges in a submerged fashion to an open tank whose free liquid surface is 3 m lower than the liquid surface in the pressure tank. If pump puts 1.5 kW Into the liquid, determine the flow rate and the pressure in the pipe on the suction side of the pump. Assume turbulent flow.
Three pipes of diameters 0.4m, 0.2m and 0.3m of lengths of 400m, 200m, and 300m, respectively, are connected in series. The compound pipe connects two water tanks having a difference of water level of 25m. Determine the discharge through the compound pipe neglecting the minor losses when the coefficient of friction for the compound pipe is 0.006.