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What is the difference between a 3R and a 3D elbow

What is the difference between a 3R and a 3D elbow

1.There is no difference between 3R and 3D. Both have a centerline radius of three times the nominal diameter size. Both have a smoother curve than an SR or LR.

2.(In fittings, 3D does not refer to modeling software or screens.)

Hei Yan is the supplier of pipe fittings machine, such as bending machine, pipe expanding machine,

tee machine and so on!

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