Tube Seam

[Carl Wilson 4Participant @carlwilson4]

Whether or not BA threads, number or letter drills etc are used in new work today is completely irrelevant.

They are engineering standards and could still be used if required. Not long ago I worked on aircraft where BA and BSF threads, as well as number and letter drill sizes were in use every day.

To claim that these are not engineering standards is a bit misleading.

Of course, if you are building something in your own shop, you have the choice to use any standards you like. Or indeed none at all.

[Martin KyteParticipant @martinkyte99762]

Posted by Bazyle on 18/02/2019 11:33:53:

Pipe is also a software term. Just as well we have gone to flat screen TVs, even curved flat screens, to avoid confusion with the cathode ray pipe TVs.
In case you are wondering Youpipe.com is taken but Youpipe.co.uk is available if you want to set up a site specially for videos of long thin tanks.

Certainly is. In USB comunications it is used in the sense of an abstract entity describing a data flow and is defined in terms of it's endpoints when configured An unconfigured endpoint is called an endpoint while a configured endpoint is called a pipe. Which fits nicely with my preferrence of pipe as a functional term.

Martin

[Neil WyattModerator @neilwyatt]

This is a hobby, and that means we don't often apply the same rigour or standards expected of professionals, everywhere from interchangeability of parts to terminology and documentation.

That said, where we are able it pays to follow the conventions of professional engineering where we are able and it doesn't become a barrier to participation or progress – and doesn't take the fun out of the hobby either.

It is useful to be aware that, in general, pipes are specified by bore and tubes by diameter*. It certainly helps people understand BSP fittings, for example. But real life gets in the way and we also need to be aware how plumber's copper pipe is specified by OD even if old lead pipe was specced by ID…

Neil

*I have this very issue at the moment with a piece of 200mm thinwall plastic 'tube' – it is out of round and to stiffen it I need to know it's actual ID and OD, it should be 200mm OD as it is 'tube' but a crude rule measurement suggests this is the ID, so I will have to calculate the actual figures from its circumference and wall thickness.

[Former MemberParticipant @formermember19781]

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[Paul LousickParticipant @paullousick59116]

I went along to our local "Mens Shed" (community workshop) today and saw someone turning a thread on a piece of 1" (now called 25mm in metric) brass pipe which was to be screwed into a 1" BSP brass fitting.

Would you be able to do this if you ordered 25mm pipe and was supplied 25mm tube instead ?

Paul.

 

Edited By Paul Lousick on 19/02/2019 05:08:07

[Former MemberParticipant @formermember19781]

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[Paul AinsworthParticipant @paulainsworth93685]

Seamless 54mm OD pipe/tube/cylinder without a middle for the boiler but I'll be having a pop at a strap seam one out of plate just for the experience.

Thanks for the clarifications, I learn a lot reading these discussions you experienced folk have.

[KWILParticipant @kwil]

You could also have it TIG welded to avoid the strap, inside or out.

[Former MemberParticipant @formermember19781]

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