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bending

In applied mechanics, bending (also known as flexure) characterizes the behavior of a slender structural element subjected to an external load applied perpendicularly to a longitudinal axis of the element.
The structural element is assumed to be such that at least one of its dimensions is a small fraction, typically 1/10 or less, of the other two. When the length is considerably longer than the width and the thickness, the element is called a beam. For example, a closet rod sagging under the weight of clothes on clothes hangers is an example of a beam experiencing bending. On the other hand, a shell is a structure of any geometric form where the length and the width are of the same order of magnitude but the thickness of the structure (known as the 'wall') is considerably smaller. A large diameter, but thin-walled, short tube supported at its ends and loaded laterally is an example of a shell experiencing bending.
In the absence of a qualifier, the term bending is ambiguous because bending can occur locally in all objects. Therefore, to make the usage of the term more precise, engineers refer to a specific object such as; the bending of rods, the bending of beams, the bending of plates, the bending of shells and so on.

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  1. M

    Bending 22mm coated copper

    Is there a way of bending 22mm coated copper with a bender without stripping back the coating?
  2. D

    Bending a 15mm chrome pipe help please

    I'm changing a radiator and the problem I have is the flow and return pipes that fit into the valves need to be positioned away from the wall further because of the new radiator being a larger depth. I want to put a small kick in these pipes to bring them out more but when I put a 15mm spring...
  3. M

    Bending overflow pipe

    Anyone else have success bending overflow pipe in there 22mm bender?
  4. S

    Bending 15mm copper 180 degrees?

    I have a Draper 34212 lever bender. I know it isn't a Hilmor but I don't bend 3/4" much so it does the job. The one thing that is difficult is bending 180 degrees. Do you guys have any tips? Obviously I can do two 90 degree bends with a gap between but often I need a 180. I was thinking of...
  5. J

    When I was an apprentice..... (competition bending 22mm copper)

    Once upon a time... it goes like this, plumber 'n I thought we'd have some fun! Competition to bend 22mm copper (table X) in hand bender without pressing one of the handles on floor or wall - i.e. using it like a chest expander. One for tough nuts and labourers - so we cut some equal lengths...
  6. D

    Excellent pipe bending skills

    Come on, Fess up!! Which one of you did this?
  7. H

    Which brand of 22mm copper best for bending?

    Hi everyone. What is the best brand of copper pipe for bending. Size 22mm? Screwfix and city plumbing are Wednesbury but found quite a few negative reviews about ripple when bending. Jewsons are Melleur which I can’t find any reviews about. Wicks don’t say which brand but agin lots of bad...
  8. jaydebruyne

    Chrome pipe bending and filing

    whats the best and quickest method of filing off the chrome plating on chrome 15mm copper? And is chrome pipe bendable? Any method I need to adopt to bend it? Doing a job next week fitting 10 new rads and the woman wants all rads to have chrome pipework coming up from floor.
  9. D

    Bending 18mm shower pipe

    Hello everybody. I've had to install a shower in a bathroom where the roof encroaches into the room. This means I'm higher limited. I thought I'd try my luck as there were quite a lot of variables but I've come up unfortunate. Now, obviously being a plumber I've got a pipe bender that does...
  10. R

    Cooker Hose Classification

    Bayonet fitting should should allow hose to fall naturally without bending the hose at the connection. A cooker hose that is strained or bent where it connects to bayonet fitting I thought was classified as at risk because there is a Rick the hose could fail. Someone told me today it's just Ncs.
  11. Jay The Plumber

    Bending offsets - your method

    right, when I'm bending offsets I make the first angled bend, usually 45 degrees then I measure from the straight end section across the distance of the offset I require, then I add an additional 20mm and mark the pipe around. then Its back into the bender to make the offset, I lower the wheel...
  12. marvoni

    Pipe Bending

    I need to bend a 22mm class I pipe into a full 360 degree turn. I need the inside diameter of the bend to be a nominal 95mm. I'm hoping to avoid making up specific tooling because of the expense and wondered if anyone had any ideas how I might do it. I have available a standard plumbing type...
  13. L

    Ribbed pipework after bending.

    Hi its me again. I am using the pipe guide on a hand held bender, but still gettin ribbed pipes on a 90 degree bend? Why is the bend not a clean 90 degree sweep? thanks!:tounge_smile:
  14. L

    Bending 22mm pipe

    Hi, do most use a hand held device, or a spring, if you are a samson, or a free standing device, like the hilmor one? Thanks.:tounge_smile:
  15. I

    Hilmor bending machine

    Had my hilmor bender for about 7 months and 2day it broke in half while bending 22mm pipe anyone any idea what i should do. Should i contact hilmor
  16. M

    bending 15mm copper pipe

    Can't find a thread that had covered this already probably because it's a stupid question but here goes, I used a internal bending spring to bend some 15mm copper pipe to a 90 degree angle. One bend went ok but then next has ripples on the inside of the bend, it hasn't kinked but one ripple...
  17. B

    my new bending machine

    how cools this https://www.youtube.com/watch?v=4uxAQuTZ0l8
  18. S

    Rothenberger pipe bending guides

    Hi, I have some rothenberger pipe benders and I have now just lost my second guide for it, as the guides are so expensive to replace I was just wondering if there are any cheaper brands that will fit my pipe bender. many thanks :)
  19. A

    8mm pipe to rad valves on a tight bend

    Hi All, in my 1980 built house the rads are on a 15mm system reduced to 8mm into the valves by running the pipe behind the rad they down and returned into the valve. It is very neatly done and i have fitted a couple more rads and want to replicate the same finish BUT.... i cannot for the life of...
  20. M

    bending 28mm tube with spring

    Is the best way to do this by annealing tube first and cooling with water before insertion of spring and bending?
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