Elbow and elbow the most basic difference is relatively relatively short pipe elbow. R=1 times as much as 2 times the elbow, and then a large number of elbow. In the production process of cold bending pipe can be used with a straight pipe bending machine, a one-time finish without two anti-corrosion. But bend to manufacturers customized, to do anti-corrosion, long order cycle. Elbow bend to price than high but the price is much higher than the elbow, do not bend antiseptic treatment is easy to damage is of well-known, but because of its cheap price in some of the requirements are not very high engineering use very much.
Elbow to manufacturers custom-made, to anti-corrosion, order cycle length. The cold bending pipe can be bent by a pipe bending machine. Two times a one-time completion of anti-corrosion. Cold bend pipe construction technology has an oil standard, the west east gas transmission enterprise standard. However, the open area with elbow bends, only to consider the cost, elbow hot simmer, bend cold bending can, of course, high cost elbow. Sometimes narrow sections must be used such as elbow, rock trench, because the bend radius of curvature is small, generally 6D, elbow 40D