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ABS vs PVC Pros and Cons |
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'''Pros :''' | '''Pros :''' | ||
1)Chemical resistance, so can stand up to the average weekender going crazy experimenting with every different thing that can be found in an aerosol can. | 1) Chemical resistance, so can stand up to the average weekender going crazy experimenting with every different thing that can be found in an aerosol can. | ||
2)Light weight, even the weakest of us has no reason to heft and bear these devices. | 2) Light weight, even the weakest of us has no reason to heft and bear these devices. | ||
3)Low cost, it can be obtained almost anywhere, in the correct dimensions. | 3) Low cost, it can be obtained almost anywhere, in the correct dimensions. | ||
'''Cons:''' | '''Cons:''' | ||
1)NOT PRESSURE RATED! This material has been proven to be acceptable, but standard pipe is not certified for any pressure service above those found in gravity drain applications, typically not above 10 psi. The term "cellular core" means that millions of tiny air bubbles were whipped into the plastic before it was run through the extruder. The end result is a very light weight material that in effect is nothing more than a piece of hard foam in the shape of a tube. | 1) NOT PRESSURE RATED! This material has been proven to be acceptable, but standard pipe is not certified for any pressure service above those found in gravity drain applications, typically not above 10 psi. The term "cellular core" means that millions of tiny air bubbles were whipped into the plastic before it was run through the extruder. The end result is a very light weight material that in effect is nothing more than a piece of hard foam in the shape of a tube. This hard foam can be strong but inevitably an unfortunate configuration of bubbles can cause catastrophic failure. | ||
2)If it fails, it will fail. When it goes, it will turn into many little shards of sharp plastic that will invariably find you in some way. | 2) If it fails, it will fail. When it goes, it will turn into many little shards of sharp plastic that will invariably find you in some way. | ||
3) Decomposition products are nasty! If you have ever taken a whiff after firing it a few times, you will get a burning in your nose. This caustic gas is not good for you! | |||
== '''PVC''' == | == '''PVC''' == | ||
Revision as of 17:08, 31 January 2007
ABS
Pros :
1) Chemical resistance, so can stand up to the average weekender going crazy experimenting with every different thing that can be found in an aerosol can.
2) Light weight, even the weakest of us has no reason to heft and bear these devices.
3) Low cost, it can be obtained almost anywhere, in the correct dimensions.
Cons:
1) NOT PRESSURE RATED! This material has been proven to be acceptable, but standard pipe is not certified for any pressure service above those found in gravity drain applications, typically not above 10 psi. The term "cellular core" means that millions of tiny air bubbles were whipped into the plastic before it was run through the extruder. The end result is a very light weight material that in effect is nothing more than a piece of hard foam in the shape of a tube. This hard foam can be strong but inevitably an unfortunate configuration of bubbles can cause catastrophic failure.
2) If it fails, it will fail. When it goes, it will turn into many little shards of sharp plastic that will invariably find you in some way.
3) Decomposition products are nasty! If you have ever taken a whiff after firing it a few times, you will get a burning in your nose. This caustic gas is not good for you!
PVC
Pros:
1)Inexpensive, the pipe is almost free. Fittings are where the money is dropped, but well worth it
2)Multitude of dimensions to chose from. Pretty much any configuration of pipe fitting can be found somewhere in PVC, but get out your checkbook! 6" sch 80 will run you right around $40 for a 10' piece.
3)Pressure Rated. What you see is what you get. The rated pressure on the side of the pipe is already conservative, so you don't need to incorporate safety factors, unless you want to. Fittings are always stronger than bulk pipe, as long as the glue joints are made and allowed to cure properly and are Schedule 40.
Cons:
1)Limited Chemical Resistance. Aldehydes and ketones are out, as these readily dissolve the polymer, as in a glue joint, just read the label on the can: Acetone, THF, MEK. Some fuels should be totally avoided such as carb cleaner and insect repellant, don't say I didn't warn you!
2)More brittle than ABS, but by not using oxygen and just burning fuel and air....should never be a problem.
3)Cellular core PVC is common at many hardware/home improvement stores. Make sure you buy SCH 40 pipe with a pressure rating printed on the pipe. If the pipe is not specifically marked with a certain PSI rating, IT IS NOT PRESSURE RATED!!
''Source taken from www.spudtech.com''
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