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Pipe union nuts, olives & ends.

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RRMBK	01/02/2012 10:38:36
159 forum posts 18 photos	Can anyone please point me in the direction of a table of the correct dimensions for the union nuts, end fittings and pipe olives etc for the various small pipe sizes that we use e.g 1/8, up to 3/8 . I would also be interested in any articles on the manufacture of unions, union nuts, olives etc. I have done a search through the indices but not come up with very much. ( probably my lack of understanding of search protocol!) Many thanks Brian K.
Colin Abrey	01/02/2012 11:01:21
17 forum posts 2 photos	Brian, There is an article in ME 15 Feb 1985 by N (Bill) Baily. He gives tables for the dimensions of the nuts & nipples for various pipe diameters. Colin
RRMBK	03/02/2012 18:45:25
159 forum posts 18 photos	Thank you very much indeed Colin, a very interesting article and provided me with just what I needed, Kind regards Brian K.
David Haynes	04/02/2012 10:07:28
168 forum posts 26 photos	Are similar details also to be found in one of the reference books, such as by Tubal Cain or Harold Hall? If not, I can get the M.E. from my society if necessary. Dave Edited By David Haynes on 04/02/2012 11:58:57
RRMBK	05/02/2012 01:54:12
159 forum posts 18 photos	They are not in Tubal Cain's Mod Eng handbook ( at least not in my ancient copy!) that was my first port of call as it is such a goldmine of information, Also I have "Screw Thread manual " by F.J.Camm of 1942 with over 40 pages of thread & screw tables but it does not list anything similar. I suspect the thread system has been created by someone ( LBSC?) matching the appropriate sized M.E 40 or 32 tpi thread to the pipe / Union diameter rather than by scaling something that exists in full size. Brian K.
Stub Mandrel	05/02/2012 19:37:08
4318 forum posts 291 photos 1 articles	Somewhere I have a 1940s ME with a table of suggested sizes of unions for various sizes of pipe. I followed them and they work OK, if a little big. I made a taper bit just for the job. Neil
Roger Best	05/02/2022 20:34:04
406 forum posts 56 photos	Did anyone find anything?? i will start a new thread. R
Speedy Builder5	05/02/2022 20:45:50
2878 forum posts 248 photos	Buy a few fittings and measure them, however apart from a few specials, I usually buy the nuts and olives/ nipples. Bob
HOWARDT	05/02/2022 20:53:28
1081 forum posts 39 photos	Fitting sizes This is on the Super Simplex site. May be useful.
John Olsen	05/02/2022 21:09:18
1294 forum posts 108 photos 1 articles	Here's a tip for anyone using commercial compression fittings on copper tube, which I guess would only be on larger locos, or on a steam launch like mine. They come with the wrong sort of olive, the ones meant for nylon tube, at least the ones I have bought generally did. It turns out these will sort of work on copper tube, at least for a while, but are likely to start leaking, usually in an awkward place to see. Of course I didn't know this at first! The ones for nylon or plastic tube have a short taper on each end and then a step up to a larger diameter in the middle. The ones for copper have a longer taper at each end that meets in the middle. If there is information in the 1940's ME about model size fittings, I probably have the issues here. I have some wartime ones, and a pretty complete collection from 1944 until covid started. regards John

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