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ASTM A234 Wp5 Wp9 Wp11 Wp22 Wp91 2D 3D 5D 6D 8d 10d Alloy Steel Pipe Fittings Bend Specifications Size 2″NB TO 18″ NB Type Seamless / ERW / Welded / Fabricated Bending Radius R=1D, 2D, 3D, 5D, 6D, 8D...