Download GTU BE/B.Tech 2019 Winter 7th Sem New 2170502 Process Equipment Design Ii Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019

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Subject Code: 2170502

Subject Name: Process Equipment Design -11

Time: 10:30 AM TO 01:30 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q1

1. Discuss the following: (i) internal design pressure (ii) external design pressure (iii) design temperature [03]
2. List the basic mechanical properties which a material should possess and explain any three of them? [04]

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3. Explain in brief about classification of unfired vessel as per IS-2825 [07]

Q2

1. List the various standard flanges and different types of gaskets. Also draw a neat sketch of any one flange facing. [03]
2. Discuss the design steps for pressure vessel for Torispherical head subjected to internal pressure. [04]
3. Examine the data given below to evaluate the requirement of reinforcement pad for the nozzle opening in cylindrical shell. [07]
   

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   OD of shell = 2 m, maximum working pressure within shell = 3.5 MN/m?, thickness of shell =0.05 m, corrosion allowance = 3 mm, joint efficiency of nozzle and shell = 1, MOC=1S 2002, Allowable stress = 96 MN/m?, Density = 7800 kg/m?, OD'of nozzle = 0.25 m, Nozzle wall thickness = 0.016 m, length of nozzle= 100 mm.

OR

1. A tower having 4.5 m inside diameter & 8 m length from tangent line to tangent line of the end closers. Tower is operated under vacuum. Tower shell is constructed from-SA-283 grade-B carbon steel plate, which has yield strength of 1898.4 kgf/cm?. Determine the required thickness of shell without stiffeners. Assume 8 mm thick plate. [07]

Q3

1. Explain radiography test. [03]

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2. Discuss in brief about the various types of fabrication technique used for the fabrication of pressure vessel. [04]
3. Discuss about different types of jackets with neat sketches of each. [07]

OR

1. Give full form of TEMA ,ASME and HTRI [03]
2. Explain in brief the various pressure tests carried out for the design of pressure vessel. [04]

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3. Discuss about different types of agitators and their selection criteria. [07]

Q4

1. Give the function of tube sheet, shell side partition and tube side partition in a heat exchanger. [03]
2. Write in short about the mechanical design of shell and tube heat exchanger. [04]
3. A fixed conical roof storage tank is fabricated from structural steel plate (IS — 2062). Based on the given following data find out the thickness of conical roof plate and size of roof curb angle. Storage tank can be classified as ‘Class A Tank’. [07]
   

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   Tank diameter = 7m
   Tank height = 5m
   Slope of conical roof = 1/6
   Superimposed live load on roof = 125 kgf / cm?
   Modulus of elasticity of Plate material = 2x10⁶ kgf /cm?
   

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   Density of Plate material = 7800 kg / cm?
   Poisson’s ratio = 0.3
   Thickness of topmost shell course = 10 mm
   Minimum size of roof curb angle = 65 mm x 65 mm x 6 mm

OR

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1. Give the function of baffles, tie rod, sealing strip in a heat exchanger. [03]
2. The shell & tube heat exchanger has the following data: [04]
   Shell inside diameter = 580 mm
   Tube O.D. = 19.05 mm ;Thickness of tube = 1.65 mm
   Internal operating pressure of shell side = 2.0 kgf/cm?;
   

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   Internal operating pressure of tube side = 6.0 kgf/cm?
   Allowable stress for shell and tube material = 1054 kgf/cm?
   Material of shell : SA 312 TP 304 (seamless pipe)
   Material of tube : SS 304; Density of SS 304 = 8000 kg/m?
   Mean diameter of gasket = 550 mm
   

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   No. of pass on tube side = 2; Depth of pass partition plate = 5 mm
   Calculate:
   • Thickness of shell
   • Thickness of tube
   Use only internal design pressure. Neglect the thickness calculation by external design pressure.
3. Discuss the various steps used for design of column supported conical roof. [07]

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Q.5

1. What is meant by a bracket? How many brackets are required, if vessel diameter is <5 m & >5 m? [03]
2. Write a short note on Tray supports used for distillation column. [04]
3. Discuss the design of bracket support [07]

OR

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1. Answer in True or False-for the following statements [03]
   • Short vertical ‘cylindrical vessels are generally supported by bracket support.
   • Saddle support and Skirt support are same.
   • Tall vertical vessels are supported by Lug support.
2. Explain the design procedure for saddle support. [04]

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3. Find the thickness of a straight cylindrical skirt support for distillation column based on following data. [07]
   Diameter of column = 2500 mm; Height of distillation column = 40 m;
   Max. weight of vessel, its attachment & contents = 300000 kg
   Diameter of skirt =2500 mm; Height of skirt =5 m; Wind pressure at the top of column =128.5 kgf/m*; Material used for skirt support = IS 800 structural steel; Max. allowable tensile stress = 1400 kgf/cm?; Max. allowable compressive stress = 666 kgf/cm?; Max. allowable bending stress = 1575 kgf/em?; Seismic coefficient =0.08; Minimum wt of empty vessel = 250000 kg

Date: 26/11/2019

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Total Marks: 70

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