The function of an elbow is to change the direction or flow in a piping system. By default, there are 5 opportunities, 45?, 90? and 180? elbows, all three in the long radius version, and 90? and 180? elbows in the short radius version. Standard: ASTM B16.9/16.5/16.47A/16.47B B2220 ? 2001, SH3408, SH3409,GBT12459, GB/T13401
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