Bends and Backdrops
S & S Bend (45)
Bends are produced in any angle at request.
Larger diameter bends can be made.
Bends are manufactured for both Ogee and S&S joints and are so designed as to include 100mm straight section on both spigot and socket ends, so as to improve the hydraulic characteristics of the bend.
|Permissible angles under I.S.6: as follows||Table 6|
|Nominal Size mm||Permissible Angle|
|150||90°, 45°, 22½°|
|Minimum Invert-to-Invert Backdrops|
|Pipe Diameter mm||Drop Size||T +2 x 45º Bends (min)|
|300 to 450mm Ø||300mm||800mm|
|300 to 450mm Ø||375mm||1180mm|
|525 to 675mm Ø||450mm||1180mm|
|525 to 675mm Ø||525mm||1380mm|
|750 to 900mm Ø||600mm||1500mm|
Junctions and Bends are manufactured in accordance with I.S.6. They have the same wall thickness and internal diameters as the pipes with which they are to be used. Junctions are manufactured from components produced by the vertically cast process, but the whole of the branch, the main incorporating the branch, and bends, should be encased in a concrete surround designed to withstand external loads.