Case Study: Pipe Fittings
Design Brief These fittings are required to transfer water from a pumping module to a variety of water treatment modules. All the specifications of the concepts fulfil the design constraints.
University of Malta
Department of Industrial and Manufacturing Engineering
Case Study C - Pipe Coupling 24 November 2012 08:47
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Catalogue
University of Malta
Department of Industrial and Manufacturing Engineering
Name: Pipe Coupling A Description: Quick pipe coupling
Number of parts: 9 Number of re-usable parts: 7 Minimum Operating Temperature (째C): -15 Maximum Operating Temperature (째C): 80 Normal Operating Pressure (bar): 10 Maximum Operating Pressure (MPa): 12 Cost per fitting (Euros): 18.96 Material: Plastic Comments: Possible issues with degradation due to UV irradiation
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Name: Pipe Coupling B Description: Brass compression fitting
Number of parts: 5 Minimum Operating Temperature (째C): -50 Normal Operating Pressure (bar): 12 Cost per fitting (Euros): 4.82 Comments:
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Number of re-usable parts: 3 Maximum Operating Temperature (째C): 200 Maximum Operating Pressure (MPa): 16 Material: Brass
5
Name: Pipe Coupling C Description: Threaded pipe fitting
Number of parts: 1 Minimum Operating Temperature (째C): -10 Normal Operating Pressure (bar): 9.22 Cost per fitting (Euros): 5.29 Comments:
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Number of re-usable parts: 1 Maximum Operating Temperature (째C): 120 Maximum Operating Pressure (MPa): 12.22 Material: Plastic
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Description: Pipe Coupling D
x2 Number of parts: 3 (1 + 2) Minimum Operating Temperature (째C): -25 Normal Operating Pressure (bar): 4.5 Cost per fitting (Euros): 4.16 Comments:
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Number of re-usable parts: 3 Maximum Operating Temperature (째C): 60 Maximum Operating Pressure (MPa): 6.8 Material: Plastic
7
Name: Pipe Coupling E Description: Barbed Brass Fitting
x2 Number of parts: 3 (1+2) Minimum Operating Temperature (째C): -120 Normal Operating Pressure (bar): 8.61 Cost per fitting (Euros): 5.32 Comments:
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Number of re-usable parts: 3 Maximum Operating Temperature (째C): 385 Maximum Operating Pressure (MPa): 14.86 Material: Brass
8
Name: Pipe Coupling F Description: Mechanical Coupling
Number of parts: 5 Minimum Operating Temperature (째C): -220 Normal Operating Pressure (bar): 55.21 Cost per fitting (Euros): 46.08 Comments: Pipe ends need to be machined
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Number of re-usable parts: 5 Maximum Operating Temperature (째C): 560 Maximum Operating Pressure (MPa): 70.62 Material: Steel
9
Name: Pipe Coupling G Description: Screw coupling
Number of parts: 3 Minimum Operating Temperature (째C): -110 Normal Operating Pressure (bar): 46 Cost per fitting (Euros): 64.1 Comments:
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Number of re-usable parts: 3 Maximum Operating Temperature (째C): 296 Maximum Operating Pressure (MPa): 55.61 Material: Steel and Rubber
10
Name: Pipe Coupling H Description: Flange
Number of parts: 11 Minimum Operating Temperature (째C): -160 Normal Operating Pressure (bar): 26 Cost per fitting (Euros): 35.21 Comments: Pipe ends need to be welded to flange
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Number of re-usable parts: 10 Maximum Operating Temperature (째C): 360 Maximum Operating Pressure (MPa): 40 Material: Stainless Steel and Rubber
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Meeting Notes
University of Malta
Department of Industrial and Manufacturing Engineering
Pipe Coupling A 21 November 2012 17:46
These kind of fittings can be bought from our supplier. Minimal tools required to use these fittings
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Pipe Coupling B 21 November 2012 17:48
Cheap but not easy to assemble. Problematic when disassembling these types of couplings A substantial amount of machining is required
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Pipe Coupling C 21 November 2012 17:50
Poor degradation resistance to UV radiation
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Gripping feature tends to wear out quickly.
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Pipe Coupling D 21 November 2012 17:51
Previous issues related to degradation by UV irradiation
Easy to fabricate The concept dos not require any tools
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Pipe Coupling E 21 November 2012 19:07
A substantial amount of material has to be removed.
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Excellent degradation resistance to sea water
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Pipe Coupling F 21 November 2012 19:09
Leaks caused by cracking of the rubber seal
Clearance between bolt and house rendered the disassembly process rather problematic. This was especially the case when hex sockets were used
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Pipe Coupling G 21 November 2012 19:12
2 Allen Bolts
Internal rubber lining
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Pipe Coupling H 21 November 2012 19:18
Some of the engineers noted that a substantial amount of material needs to be removed, however the fabrication process is relatively simple.
Some colleagues notes that this concept takes too much time to assemble and disassemble
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People
University of Malta
Department of Industrial and Manufacturing Engineering
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