Remember too, there is a difference in schedule 80 fittings vs schedule 40 fittings, and a difference in pressure ratings between the smaller size pipes and the larger sized pipes. In other words a 1/4 sch 40 fitting might very well handle 2000 psi but a 3/4 sch 40 might only be rated at 500 psi, and it will take a sch 80, or better, in the 3/4 to hande the higher pressure. The same holds true in actual hydraulic fittings and line also. Where a 1/4 two wire hose might be good for 2500 psi, the same 2 wire hose in a 3/4 size isn't going to be rated as high and will commonly require a 4 wire hose for the same rating/burst pressure as the smaller hose.
Just remember I am talking in the most general terms here, and using round figures, with no actual basis other than using them as an example. In other words the sizes and pressures mean absolutely nothing beyond expressing the fact that using standard pipe fittings in any hydraulic system without knowing the pressures on the system, the pressure ratings of the fittings, the system temp, and any other pertinent information is nothing but an accident waiting to happen.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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