What types of fittings does IS 7322 cover?

It covers specials such as bends, tees, crosses, reducers, and outlets for steel cylinder reinforced concrete pipes.

What is the primary test required for these specials?

The primary test is the hydrostatic proof test (Clause 9) to ensure the special can withstand its design internal pressure without leakage or failure.

Does this standard cover the pipes themselves?

No, this standard is exclusively for the 'specials' (fittings). The corresponding pipes are typically covered by other standards like IS 3589 (for steel pipes, which form the cylinder) and IS 458 (for general precast concrete pipes).

What materials are specified for the steel components?

The steel cylinder, plates, and flanges should generally conform to relevant IS codes like IS 2062 for structural steel.

IS 7322

: 1985

specials for steel cylinder reinforced concrete pipes

CurrentSpecializedSpecificationWater Resources · Cement Matrix Products

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This standard specifies the requirements for materials, dimensions, fabrication, and testing of 'specials' or fittings for steel cylinder reinforced concrete pipes. These fittings include items like bends, tees, reducers, and branches used primarily in large-diameter water supply, irrigation, and sewerage pipelines.

specials for steel cylinder reinforced concrete pipes

Practical Notes

Ensure the pressure class and jointing system of the specials match those of the connecting pipes.

Hydrostatic testing of each special is mandatory and crucial before installation to prevent catastrophic pipeline failures under pressure.

Careful handling during transport and installation is essential to avoid damage to the concrete lining/coating and the steel components of the special.