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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

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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

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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

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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

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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

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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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Pipe Fittings Booklet  

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