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32 Cards in this Set
- Front
- Back
The ASME Code for pressure piping contains sections on piping requirements for:
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1.Power Piping
2.Industrial Gas and Air Piping 3.Refinery and Oil Piping 4.Refrigeration Piping Systems |
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Two Ferrous materials commonly used in piping
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Steel and Cast Iron
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Two Non-Ferrous materials commonly used in piping
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Brass and Copper
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True or False:
Cast Iron is the most frequently used material for piping |
False
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Instrumentation and water services, where temperature is not a factor, make use of:
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Non-Ferrous materials such as copper and copper alloys
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What are 3 applications where Cast Iron might be used in a power plant
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1.Ash handling systems
2.Sewage lines 3.Underground water Line |
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Commerical Pipe is made in standard sizes, Above 304.8mm (12 in), the size is given as the:
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Actual outside Diameter
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Schedule Numbers are used to indicate what in piping
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Wall Thickness
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What are 3 general methods used to join or connect lengths of pressure piping
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1.Threaded Pipe and Screwd Connections
2.Flanges 3.Welded Joints |
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What Pipe Fitting is used to make angle turns in piping
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Elbow Fittings
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What fitting is used to make close connections; threaded on both ends with the close nipples threaded for its entire length
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Nipple Fittings
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What fitting is used for connecting two pieces of pipe of the same size in a straight line
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Coupling
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What fitting is used to provide an easy method for dismantling piping
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Unions
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What fitting is uses to make branch line connections at 90 Degrees
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Tees and Crosses
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What fitting is uses to make branch line connections at 45 degrees
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Y-Bend Fitting
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What fitting is uses to reverse the direction of a pipe run
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Return Bend
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What fitting is used to close off open pipe ends or fittings
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Plugs and Caps
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What fitting is used for connecting pipes of different sizes
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Bushings
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What fitting is used to reduce pipe size
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Reducers
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List 2 advantages of Screwed Connections
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1.Ease of assembly
2.Possibility of disassembly |
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List 2 Disadvantages of Screwed Connections
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1.Connections subject to leakage
2.Strength of the pipe is reduced where threads are located in the pipe walls |
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List 2 advantages of Flanged Connections
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1.Permit Disassembly
2.More Convienent to assemble and Disassemble then Screwed Connnections |
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What is the Disadvantage of Flanged Connections
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They require Gaskets
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List the 5 advantages of Welded Connections
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1.Possibility of leakage is removed
2.Weight of the piping system is reduced 3.Cost of the materials and maintenance is reduced 4.looks neater and is easier to insulate 5.More flexibility |
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What is the Main Disadvantage of Welded Connections
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Necessity of obtaining a Skilled Welder
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As a minimum, Piping fittings must conatin what identification
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1.Manufacturers Name or Trade Mark
2.Service Designation 3.Material Designation |
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List 2 general methods used to accommodate expansion in piping
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1.Expansion Bends
2.Expansion Joints |
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Name the two types of Expansion Joints
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1.Slip
2.Corrugated |
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Explain the need for a bypass line with a globe valve in a typical piping layout for a steam trap
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To allow for inspection and isolation of the trap without service interuption
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List 3 possible causes of water hammer in a piping system
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1.When steam is introduced to a cold pipe
2.When flow in a steam pipe is very slow and normal cooling occurs 3.Steam is admitted to a pipe containing water or condensate |
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State the purpose of insulating pipingg that carries substances at a lower temperature then that of the surrounding air
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the insulating material prevents the piping from sweating and constant dripping and corrosion
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List 5 desirable characteristics of an insulating material
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1.High insulating Value
2.Long Life 3.Vermin Proof 4.Non-Corrosive 5.Ability to retain its shape and insulating value when wet |