Pipe vs Tube??
09-06-2009, 05:27 PM
#1
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Pipe vs Tube??
Alright Im trying to make a front bumper and theres a thread about the a cheap DIY bumper and he used 120 OEM or something, talked to some buddies and they said pipe is crap...I honestly dont know the difference? I want it sturdy and be able to take some trail abuse but im not worried about putting a winch on it so basically just want something that wont rub and have a few good recovery points. So anyone have any info on what size wall to use and whether to use pipe or tube type? Im trying to make this a budget build so its kinda pointless if the materials are going to cost almost as much as buying a premade (online) bumper. Thanks guys
09-06-2009, 05:47 PM
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Hey man, I don't have much jeep experience but I worked in a chassis fab shop for a couple of years. You want tubing, DOM to be specific. .120 wall is pretty standard stuff for that application from what I have gathered on this site. DOM is just a steel tubing. Hope this helps you out
09-06-2009, 06:30 PM
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pipe is exactly the same as regular tube (welded tube, not DOM), it is just sized different. for a bumper, you would be perfectly fine using pipe, just make sure you get all the galvanized coating off of it because it will leave a weak/porous weld and the gases it gives off are dangerous
09-06-2009, 08:31 PM
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for a cheap bumper that you can DIY get you some 2x4 rectangle tubing 3/16 or a 1/4 thick and some of these....http://www.jcroffroad.com/Merchant2/...egory_Code=XJB and if you have a welder or access to itll be a cake walk, next is some weld on shackles and youll be good to go, best places for ideas is rusty's ajs offroad, and jcr.
that will prolly put you at less than 100, i wish i had a welder back before i got my bumper cause it wouldnt have cost me like 250 but hey 250 is still a great deal
that will prolly put you at less than 100, i wish i had a welder back before i got my bumper cause it wouldnt have cost me like 250 but hey 250 is still a great deal
Last edited by claygrassmann; 09-06-2009 at 08:36 PM.
09-06-2009, 08:44 PM
#5
For a cage, steering, or suspension parts, nothing but D.O.M....period.
For rock sliders, bumpers, hoops, etc,.....HREW.
HREW is a fraction of the cost of D.O.M
For those that don't know the difference:
http://www.protofab.com/tubing.html
There's alot of info on the web about both.
For rock sliders, bumpers, hoops, etc,.....HREW.
HREW is a fraction of the cost of D.O.M
For those that don't know the difference:
http://www.protofab.com/tubing.html
There's alot of info on the web about both.
09-06-2009, 09:30 PM
#6
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Here's some good info about this topic from GL..
Pipe is Pipe and Tube is Tube, they are different.
Tube is measured by outside diameter and wall thickness.
Pipe is 'measured' by inside diameter and schedule (wall thickness)
However, pipe is still a standard OD, and the ID varies based on the schedule. So for a 1-1/4" pipe, the OD is 1.66". Schedule 80 would have a smaller ID than Schedule 40...etc..
There's a lot of misinfo about pipe, people thinking its brittle, weak, etc. Not really true. There are a lot of different types of pipe, just like there are lots of types of tube. So getting the right material, no matter what you do, is the key to getting strong material. You will find plenty of circle track cars with pipe-built roll cages, which are going to have higher impact forces than on most any 4x4.
There are lots of types of pipe out there. Going to the home depot and buying a 10 chunk of pipe you don't know what you are getting, and its propably crap. Some types of pipe might be butt welded, so there are butt seams in the pipe that may be weak. Some types might be a weaker iron that leads people to think of the pipes being brittle.
A common one used in building cages is ASTM A53 type S grade B.
This is a carbon steel pipe, with a yield strength of 35,000 psi, and tensile strength of 60,000 psi.
I personally use ASTM A500 grade B, which is a carbon steel pipe known as structural tubing. The A500 standard actually covers both rounds and shapes such as sqaure tubing, and is often what you are buying when you buy square & rectangle tube. It is known as tubing although the rounds are available in pipe sizes. It is specifically designed for use in structural applications, and not going to be brittle or weak like people think. Min yield strength is 42,000 psi, tensile strength is 58,000 psi.
For most roll bars, bumpers, sliders, etc, 1-1/4" schedule 40 makes a nice size. That is a 1.66" OD, with a wall thickness of 0.140". Currently, a 21 ft stick of A500b 1-1/4" sch 40 runs about $35 at Pontiac Steel.
I am using 2-1/2" sch 40 for my rear driveshaft, as well.
Nominal Pipe Size OD Nominal Pipe Sizes Wall Thickness
--------O.D.-----Sch. 5 Sch. 10 Sch. 40 Sch. 80 Sch. 160 XXS
1/4"---0.540”----N/A----.065-----.088-----.119-----N/A-----N/A--
3/8"---0.675”----N/A----.065-----.091-----.126-----N/A-----N/A--
1/2"---0.840”----.065---.083-----.109-----.147-----.187-----.294-
3/4"---1.050”----.065---.083-----.113-----.154-----.218-----.308-
1"-----1.315”----.065---.109-----.133-----.179-----.250-----.358-
1-1/4"-1.660”----.065---.109-----.140-----.191-----.250-----.382-
1-1/2"-1.900”----.065---.109-----.145-----.200-----.281-----.400-
2"-----2.375”----.066---.109-----.164-----.218-----.343-----.436-
2-1/2"-2.875”----.083---.120-----.203-----.276-----.375-----.552-
Tube is measured by outside diameter and wall thickness.
Pipe is 'measured' by inside diameter and schedule (wall thickness)
However, pipe is still a standard OD, and the ID varies based on the schedule. So for a 1-1/4" pipe, the OD is 1.66". Schedule 80 would have a smaller ID than Schedule 40...etc..
There's a lot of misinfo about pipe, people thinking its brittle, weak, etc. Not really true. There are a lot of different types of pipe, just like there are lots of types of tube. So getting the right material, no matter what you do, is the key to getting strong material. You will find plenty of circle track cars with pipe-built roll cages, which are going to have higher impact forces than on most any 4x4.
There are lots of types of pipe out there. Going to the home depot and buying a 10 chunk of pipe you don't know what you are getting, and its propably crap. Some types of pipe might be butt welded, so there are butt seams in the pipe that may be weak. Some types might be a weaker iron that leads people to think of the pipes being brittle.
A common one used in building cages is ASTM A53 type S grade B.
This is a carbon steel pipe, with a yield strength of 35,000 psi, and tensile strength of 60,000 psi.
I personally use ASTM A500 grade B, which is a carbon steel pipe known as structural tubing. The A500 standard actually covers both rounds and shapes such as sqaure tubing, and is often what you are buying when you buy square & rectangle tube. It is known as tubing although the rounds are available in pipe sizes. It is specifically designed for use in structural applications, and not going to be brittle or weak like people think. Min yield strength is 42,000 psi, tensile strength is 58,000 psi.
For most roll bars, bumpers, sliders, etc, 1-1/4" schedule 40 makes a nice size. That is a 1.66" OD, with a wall thickness of 0.140". Currently, a 21 ft stick of A500b 1-1/4" sch 40 runs about $35 at Pontiac Steel.
I am using 2-1/2" sch 40 for my rear driveshaft, as well.
Nominal Pipe Size OD Nominal Pipe Sizes Wall Thickness
--------O.D.-----Sch. 5 Sch. 10 Sch. 40 Sch. 80 Sch. 160 XXS
1/4"---0.540”----N/A----.065-----.088-----.119-----N/A-----N/A--
3/8"---0.675”----N/A----.065-----.091-----.126-----N/A-----N/A--
1/2"---0.840”----.065---.083-----.109-----.147-----.187-----.294-
3/4"---1.050”----.065---.083-----.113-----.154-----.218-----.308-
1"-----1.315”----.065---.109-----.133-----.179-----.250-----.358-
1-1/4"-1.660”----.065---.109-----.140-----.191-----.250-----.382-
1-1/2"-1.900”----.065---.109-----.145-----.200-----.281-----.400-
2"-----2.375”----.066---.109-----.164-----.218-----.343-----.436-
2-1/2"-2.875”----.083---.120-----.203-----.276-----.375-----.552-
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09-06-2009, 10:27 PM
#8
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as they say...pipe is for poop. (back before pvc was popular)
I make just about everything out of 1.75" .120 wall HREW tube. Very strong, and much lighter than pipe.
I make just about everything out of 1.75" .120 wall HREW tube. Very strong, and much lighter than pipe.
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