STUDY QUESTIONS
ME 688: PIPELINES AND PRESSURE VESSELS
QUESTION 1: (20 marks)
1.1
Mention two materials normally used for corrosion protection of the field joint
area. (2 marks)
1.2
In designing pressure vessels with thin spherical shells, which two parameters
need to be determined? (2 marks)
1.3
Mention two types of temporary oil and gas pipelines’ plugging? (2 marks)
1.4
Using symbols, show a section of piping with a reducer, indicating direction of
flow towards reduced end and connected to a flexible hose on side and gate
valve on the other side. (3 marks)
1.5
Sketch the isometric drawing of the orthographic drawing shown below.
1.6
Draw an isometric of the pipe spool: (3 marks)
The routing starting at Point X
The pipe runs to the east
The pipe runs up
The pipe runs to the north
Pipe runs to the west
Pipe runs down
(2 marks)
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➢
1.7
Mention four types of compressors and their application in oil and gas field.
(6 Marks).
QUESTION 2: (20 marks)
2.1
In piping, operating pressure of the pipeline is determined by which factors? (4
2.2
Mention methods used to minimize liquid water hammer: (4 marks)
2.3
In marine pipelines, mention categories which are used in load calculations
2.4
Mention failure modes and deformations which can be encountered during
pipeline free span evaluation. (2 marks)
2.5
What is the contact angle between the saddle and vessel shell of horizontal
Vessel. (2 marks)
2.6
What are the dimensions of the Vertical vessel which may be provided with leg
type supports. (2 marks)
2.7
What are the limitation of deflection at the top of vertical vessels or columns? (2
marks)
(4 marks)
mark
QUESTION 3: (20 marks)
3.1
Which method is preferred for installing a pipeline bundle? (1 mark)
3.2
Mention two main types of risers. (1 mark)
3.3
What is Hot Tapping? (2 marks)
3.4
The required minimum thickness of shell plates shall be greater of the value
computed as per API 650 for design and hydrostatic test. Show the later
formula for calculating of shell thickness. (2 marks)
3. 5
Mention three advantages of using floating roof storage Tank (1.5 marks)
3.6
Mention at least FIVE main causes of failure of Pressure Vessels (2.5 marks)
3.7
Mention the most widely used expansion loops in cross country pipelines (2 Marks).
3.8
Draw an isometric of the pipe spool: (3 marks)
➢
➢
The routing starting at Point X
The pipe runs to the south
➢
➢
➢
➢
➢
➢
The pipe runs up
The pipe runs up and to the west
Pipe runs up
Pipe runs to the west
Pipe runs to the north-west
Pipe runs to the north
3.9
Explain with examples, why anchors are used in the aboveground piping system?
3.10
Why are thermal relief valves are used; giving values of coefficient of expansion
of liquid petroleum at 16 deg. centigrade and approximate pressure increase for
every degree rise in the fuel temperature? (3 marks)
(2 marks)
QUESTION 4: (20 marks)
4.1
Oil and gas pipeline networks are composed of several pieces of equipment that
operate together to move products from location to location either in when
gathering, distributing, or transporting. Mention these main elements of pipeline
system. (3 marks)
4.2
Pipe wall thickness design focuses on hoop stress vs minimum yield strength of
the material. Mention FOUR items to be checked during the calculation of pipe
wall thickness. (2 marks)
4.3
.
Define design factor. Why there is a difference between design factors used for
oil and gas in pipelines? (2 marks)
4.4
What is the most widely used non-positive displacement pump? Mention its
setback and how can it be avoided? (2 marks)
4.5
What is the use of the following components in gas / oil pipelines (2 marks)
4.6
According to ASME Boiler and Pressure vessel Code, Section VIII, Division 1, on
pressure Vessel Engineering and design; What is the acceptable minimum
thickness or corrosion allowance for the following. (2 marks)
i)
ii)
iii)
iv)
v)
vi)
Internal wetted components
Clad vessels
Stainless steel
Vortex breakers.
Internals wetted on both sides
Internals that are bolted and easily removable.
vii)
viii)
The minimum thickness of pressure containing components
including corrosion allowance.
Corrosion allowance on skirts or support legs attached to vertical
vessels and saddles that support horizontal tanks or drums.
4.7
Vessels in vacuum service are designed to which minimum internal pressure? If
the same vessel is subjected to steam-out what will be design pressure and
temperature? (1 mark)
4.8
Explain four main requirements of Horizontal Pressure vessels. (2 marks)
4.9
What are the values of hydraulic design velocities at a) pump discharge and b)
pump suction at full flow in piping system? (2 marks)
4.10
What is the minimum distance from the bottom of the pipe above the ground
surface is required for support height required to service valves and equipment?
(2 marks)