Thapar University 2006 B.Tech Chemical Engineering Process Equipment Design-1 - Question Paper
Thapar Institute of Engineering & Technology
Chemical Engineering (4th Year)
Final Term exam
CH033 (Process Equipment Design-1)
THAPAR INSTITUTE OF ENGINEERING & TECHNOLOGY, PATIALA ' Department of Chemical Engineering End Semester Examination s Process Equipment Design -1 (CH-033)
Semester -1, 2006-07 December 14, 2006
Max. Marks: 50 Thursday
Answer all parts of the question in a sequence 14.00 - 17.00 Hrs
Assume suitable data, if required Faculty: Dr. D. Gangacharyulu
Evaluated answer sheets will be shown at 4.00 P.M. on December 18, 2006.
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1. |
a). The piston rod of a hydraulic cylinder exerts an operating force of 10 kN. The friction due to piston packings and stuffing box is equivalent to 10% of operating force. The pressure in the cylinder is 10 MPa. The cylinder is made of cast iron ultimate tensile strength of 200 N/mm2 and a factor of safety is 5. Determine the diameter and thickness of the cylinder. To calculate the thickness, one can use Lame's equation given in the page 2. |
2.5 | ||
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b). It is required to design a square key for fixing a gear on a shaft of 25 mm diameter. The power of 15 k W at 720 r.p.m. is transmitted from the shaft to the gear. The key is made of steel 50C4 (Sy, = Syc = 460 N/mm2) and the factor of safety is 3. Determine the dimensions of the key. |
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c). What are the types of headers and closures are being used to close the cylindrical process vessels before being operated? Explain them with the help of neat sketches, nomenclature and design equations? |
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2. |
a). What are the various types of nozzles based on the method of forming and attachment? Explain the design methodology of reinforcement of nozzles? |
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b). A fractionating tower is 4.0 m in diameter by 6.0 m in length from tangent to tangent line of closures. The tower contains removable trays on a 1.0 m tray spacing and is to operate under vacuum of 0.1 MN/m2 and 400 C. The material of construction is IS: 2002-1962 Gr. I, plain carbon steel. The modulus of elasticity for this material at 400 C is 1,67x 105 MN/m2. The allowable compressive stress = 70 MN/m2. Determine the required thickness of the shell without stiffeners? (Take, K = 0.52 and m - 2.49). |
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3. |
a). Analyze the saddle support for horizontal vessel made of low carbon steel for the following data and confirm design feasibility. |
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Vessel diameter - |
1230 mm | |||
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Length of shell = |
8000 mm | |||
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Shell thickness * |
10 mm | |||
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Torispherical head: |
Crown radius = |
1250 mm | ||
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Knuckle radius = |
6% of diameter | |||
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Head depth = |
257 mm | |||
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Head thickness = |
12 mm | |||
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Working pressure = |
0.5 N/mm' | |||
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Permissible stress- |
95 N/mm' | |||
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Weight of the vessel and contents * |
119430N | |||
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Distance of saddle centre line from shell end - |
320 mm | |||
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Corrosion allowance = |
1.5 mm | |||
3. b). Explain the detailed design procedure of lug/bracket support with the help of neat 5
sketch along with base plate, gusset plate and column?
a). What are the advantages to use the variable volume storage tanks with the floating roofs to store the fluids?
b). Explain the pressure tests and dye penetration test carried out under non destructive testing methods?
a). A thick walled vessel is to be designed to withstand an internal pressure of 200 MN/m2. An internal diameter of 350 mm is specified. Calculate the wall thickness required by the various theories of elastic failure with a factor of safety 1.5.
5.
b). A low pressure steam pipe line from utility plant to evaporator section of the chemical plant is to be installed. Verify from the following data whether the wall thickness and the expansion loop radius are properly designed.
Outside diameter of
100 mm
ElEL
Allowable stress of pipe material
inside diameter of pipe
Meam pressure
team temperature
orrosion allowance
lean radius of expansion loop
aT for pipe material
Jistance between two anchor points
90 mm 135 MN/m"
1.0 MN/m'
185 C
3 mm
350 mm
400 MN/m'
70 m
END :
The average torque transmitted by the shaft, Tavc: T Horse power x 75x60
*ive -
2 7i x r.p.m.
If. +P, f,-pi
Di
Lame s equation, t = ~
-1
The inside depth of the closure, h,:
The pressure, p:
x|Rf+a.-2r,
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Attachment: |
| Earning: Approval pending. |
