Tube gauge

lexi · Post by **lexi** » 27 Dec 2009, 20:15

The various hydraulic tubes throught the Xantia. They are different DIA. Are they all the same thickness ? What is that thickness?

citroenxm · Post by **citroenxm** » 27 Dec 2009, 20:23

Do you mean all the main pipe work??

4mm 6mm and 8mm for LX and SX Non hydractive suspension.... Hydractive as much bigger pipe size, with rubber sections..

Im sure its 4, 6 and 8mm... someone correct/ confirm?

Paul

lexi · Post by **lexi** » 27 Dec 2009, 20:32

I know that there are 3.5mm and 4.5 mm dia on the brake circuit of my V6. Am I correct in assuming that these are strictly speaking, tubes and not pipe.

As in Seamless Hydraulic Tube

citroenxm · Post by **citroenxm** » 27 Dec 2009, 20:36

Tubes, no they ARE pipes, obviously what the french call pipes - Tubes...

Paul

lexi · Post by **lexi** » 27 Dec 2009, 20:47

Pipe is referred to as inside dia. Tube as outside Dia versus wall thickness.

Anyway Paul. When a brake pipe on the Xantia is mentioned at 3.5mm. is it OD?.........If so I need the gauge thickness

Martin will know all this stuff. I don`t expect him to give us ALL his trade secrets though

citroenxm · Post by **citroenxm** » 27 Dec 2009, 20:49

Hmmm not sure... could well be outside Dia.. im uncetain.

8, 9 12mm UNIONS???

8)

Paul

lexi · Post by **lexi** » 28 Dec 2009, 12:34

Any advances on this from other members?

Clogzz · Post by **Clogzz** » 28 Dec 2009, 13:30

3.5 mm, 4.5 mm and 6.35 mm are inner diameters.
Wall thicknesses … don’t know.

ellevie · Post by **ellevie** » 28 Dec 2009, 18:28

Citroen have gone for a fairly unusual outer diameter of 3.5mm for most but not all of the hydraulic pipework. They have also opted for an unusual pipe flaring method which requires a special pipe flaring tool available from Pleiades. The method they use is to create little bulges at the end of the pipes. An example is shown here,
http://www.citroen-restoration.co.uk/ds ... category=5

lexi · Post by **lexi** » 28 Dec 2009, 20:06

Thanks guys. I`m trying to cut through the mystery here. 3.5MM tube. Od or Id? The flare? It is really a Swage rather than a flare?. I will take a few pipes from a scrapper and have a closer look. Swaging tools are always more expensive.

citronut · Post by **citronut** » 28 Dec 2009, 21:12

3.5mm is the OD not ID of the smaller pipe work on hydraulic citroens,

and in the UK at least a metal tube is usualy referd to as a pipe, and a rubber pipe is usualy referd to as a tube,

so there and up your pipe or is that tube and smoke it TEA HE

regards malcolm

addo · Post by **addo** » 28 Dec 2009, 21:37

No way would it be that small. Your wall diameter is probably less than 0.3mm.

Try gauging the end of a tube inside, with drill bits.

ellevie · Post by **ellevie** » 29 Dec 2009, 07:38

The inner diameter is about 1.8mm for a 3.5mm sample.

citroenxm · Post by **citroenxm** » 29 Dec 2009, 10:23

DONT get mixed up!!

If you look carefully, it seems that there are two sizes of pipe that run to the rear, ine is for suspension feed which I think is the 3.5 pipe, and theres a larger size pipe that feeds the rear brakes... I know this as Ive just repiped an XM with the two sizes.. (I still cannot tell you what the larger size was

)

Paul

Post by **CitroJim** » 29 Dec 2009, 10:25

citroenxm wrote:I know this as Ive just repiped an XM with the two sizes.. (I still cannot tell you what the larger size was )

4.5mm isn't it Paul?

I can confirm later, I'll get my calipers (vernier ones) on a pipe on the scrapper....