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2003 Course Piping Design & Engineering (Elective II)

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Total No. of Questions : 12] P1522 [Total No. of Pages :3 [3764] - 339 B.E. (Chemical Engineering) PIPING DESIGN AND ENGINEERING (2003 Course) (Elective - II) Time : 3 Hours] [Max. Marks:100 Instructions to the candidates: 1) Answer 3 questions from Section I and 3 questions from Section II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) A horizontal commercial steel pipeline 100mm in diameter and 400m long carrying gasoline at 40 C has a pressure drop of 1.33 105 N/m2. Compute the flowrate when the specific gravity is 0.68. The kinematic viscosity of gasoline at 40 C is 4.2 10-7 m2/s. The equivalent sand grain roughness of pipe material is 4.92 10-5 m. [8] b) Discuss the procedure in determining pipe diameter for specified height of pipe wall roughness and the discharge? [8] OR Q2) a) Derive the following : [8] n r . Qo Q = n. r . n . Qo 1 b) Two pipes each 300mm long are available for connecting to a reservoir from which a flow 0.085 m3/s is required. If the diameters of the two pipes are 0.030m and 0.015m respectively. Determine the ratio of the head of head loss when the pipes are connected in series to the head loss when they are connected in parallal. Neglect minor losses. [8] P.T.O. Q3) a) b) Explain the difference between code and specification? [6] List out the major standards providing engineering bodies in piping? Explain most commonly used piping components and their dimensional standards? [10] OR Q4) a) b) Discuss the various types of gasket according to ASME B16.5 and B16.47 for flanges? [8] Explain in detail the following types of flanges : i) Weld neck Flange ii) Threaded Flange iii) Orifice Flange. [8] Q5) a) Describe the construction and principle of operation for the following types of valve actuators : [10] i) Electric motor. ii) Pneumatic. iii) Hydraulic. iv) Solenoid. b) Discuss the sizing of pressure relief valves for gas or vapor based on the ideal gas law? [8] OR Q6) a) b) State and explain two major types of rupture discs made of ductile metal?[10] What are the steps followed during sizing of control valve? [8] SECTION - II Q7) a) b) Explain the sizing of the steam trap with the help of following points:[12] i) Method of heat-up to be employed. ii) Providing suitable reservoirs or collecting legs for condensate. iii) Ensuring adequate pressure differential across the steam trap. iv) Steam trap load safety factor. v) Flow of condensate from the selected trap. Write a note on insulation material selection criteria? OR [3764]-339 2 [4] Q8) a) Explain the concept of deposition velocity for heterogeneous flow of slurry in the pipeline along with different empirical correlations proposed for estimating it? [8] b) Explain the important considerations required in the overall system design of process Piping? [8] Q9) a) b) Explain the types of plot plan and their advantages? [8] Discuss the following points for locating the pipe racks of a process unit i) Pipe rack width and number of levels. ii) Elevations and bent spacing. iii) Pipe flexibility, access and maintenance. [10] OR Q10)a) Develop the piping layout considerations for storage tanks, heat exchangers? [10] b) What are the plant layout specifications considered by the design engineer? [8] Q11)a) Explain the inadequate and correct pump piping arrangement with the help of graphic information? [8] b) What are the design criteria used in insulation system design for piping applications? [8] OR Q12)a) b) Derive the expression for critical thickness of insulation? [8] What are the most common insulation material classifications to the industrial and commercial piping industry? [8] kbkb [3764]-339 3

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