Viesturs, don't confuse US and British units although they are both called imperial units (since when do Americans care about emperors?) - they are not necessarily the same as you come to details. Screws can be a lot different, for example. I have an old English combined circular wood saw and table router with thread holes in the table where US screws don't fit. British imperial gallons are different from US gallons. Furthermore, there are American metric screws that won't fit into European nuts of the same specifications because the radii of the thread's edges are different - it's all a whole mess as long as there are no efforts of unification. In this respect, we are living in an era not much different from the middle ages because every country wants to protect their products from other manufacturers instead of making joint efforts to compete only in quality and price of the optimal products.
British pipe threads are based on inch standard and compatible with all other countries' pipes and fittings, imperial or not. Peter Viesturs La-cis schrieb: > 2012/6/16 andy pugh <bodge...@gmail.com>: > >> You are quite right, I don't know how I got that wrong. >> Except that hecto and centi are _not_ prefixes in the SI system. >> >> > > Could be, I do not know for sure... > > BTW the metric vs imperial systems and UK being somewhere inbetween > (litres from metric system and miles from imperial), I just remembered > one interesting moment from a metrology class: > In whole mainland Europe screw threads are metric, pipe threads are in > imperial units. Which does not make much of a sense to me, why would > they be separated, but then professor mentioned that pipe threads in > UK are not imperial (I _think_ that screw threads are imperial in > UK)... > So I think that pipe thread in UK has to be metric, which makes me > think that English people are doing this on purpose :)) > > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
