What is the primary application of IS 15155 pipes?

They are used for large-scale, high-pressure water transmission, such as in urban water supply schemes, irrigation networks, and power plant cooling water systems.

What are the mandatory factory tests for these pipes?

The key acceptance tests specified are the Hydrostatic Test (Clause 9) to check for leakage and strength under internal pressure, and the Three-Edge Bearing Test (Clause 10) to verify external load-bearing capacity.

What is the purpose of the mortar coating?

The dense mortar coating serves two main purposes: it provides a passivating alkaline environment to protect the steel bar/wire wrapping from corrosion, and it distributes external loads.

Is this standard for pipe design or pipe manufacturing?

This is a product specification standard, focusing on the manufacturing, materials, and quality testing of the finished pipe. The hydraulic and structural design of the pipeline system would be done separately.

IS 15155

: 2002

Bar/Wire Wrapped Steel Cylinder Pipes With Mortar lining and Coating (Including Specials)

CurrentSpecializedSpecificationBIMWater Resources · Cement Matrix Products

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This standard specifies the materials, manufacturing process, dimensions, and testing requirements for bar or wire-wrapped steel cylinder pipes. These composite pipes, featuring a steel core with internal mortar lining and external mortar coating, are intended for use in high-pressure water conveyance systems.

Bar/Wire Wrapped Steel Cylinder Pipes With Mortar lining and Coating (Including Specials)

Quick Reference Values

Minimum cement content for mortar400 kg/m³

Maximum water-cement ratio for mortar0.40

Typical mortar lining thickness12 mm to 16 mm

Typical mortar coating thickness19 mm to 25 mm

Standard pipe lengths5.0 m to 6.0 m

Minimum curing period before hydrostatic test28 days

Hydrostatic test holding time at pressureMinimum 30 seconds

Practical Notes

These pipes are a robust alternative to Prestressed Concrete (PSC) pipes for large diameter, high-pressure water transmission mains.

Careful handling during transport and laying is crucial to avoid cracking or spalling the external mortar coating, which is vital for corrosion protection of the steel wrapping.

The joint design, typically a bell-and-spigot with a confined rubber gasket, is critical for achieving a watertight pipeline and should be installed as per manufacturer's guidelines.