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FLARED END SECTIONS AND FITTINGS Fittings - Bends, Tees, Wyes, and Curves Bends are furnished in standard ranges of 15 degree angular deflections although specials can be manufactured to meet any required deflection. The bend is formed by cutting the pipe barrel to the desired bevel, spot welding, or tying together the exposed reinforcing, and packing the seams with cement mortar. Pipe bends should be equal in design strength to the abutting pipe. Tees and wyes are standard fittings for all sizes of barrel and branch and are available with all joint types of the connecting pipe. All branches shall terminate in bells or grooves, and the branch shall be of sufficient length to permit making a proper joint when the connecting pipe is inserted into the branch bell or groove. Special transition pipe sections can be manufactured to accommodate connecting pipe of different diameters. The dimensions of all fittings and manhole base tees conform to the dimensions as given in the appropriate ASTM pipe specifications. Thus wall thicknesses along with the general requirements will be the same as the standard concrete pipe requirements. Curves in concrete pipelines may be achieved by opening up one side of a pipe joint while the other side remains in the home position affecting an angular deflection of the axis of the pipe. The maximum permissible opening of the joint varies for different joint configurations and should be obtained from the pipe manufacturer. The radius of curvature which may be obtained by this method is a function of deflection angle per joint and length of pipe section. It is important to check with local manufacturers for prices and availability of fittings. Examples of bends, wyes, tees and transitions are pictured below.
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Illinois
Concrete Pipe Association |
