Can I specify IS 9627 pipes for a new water project?

No. This standard is withdrawn and asbestos products are not used for new construction due to being a major health hazard.

What does 'Light Duty' mean for these pipes?

It refers to pipes designed for low internal working pressures, such as 0.5 MPa (5 kgf/cm²) for the highest light-duty class (L5), suitable for small-scale irrigation or low-pressure water mains.

How can I identify these pipes on-site?

They are typically grey, brittle-looking pipes. Markings on the pipe may include the manufacturer's name, 'AC', the pipe class (e.g., L5), and the IS 9627 mark, if visible.

IS 9627

: 1980

asbestos cement pressure pipes (light duty)

CurrentRareSpecificationWater Resources · Cement Matrix Products

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This standard specifies the manufacturing, dimensional, and testing requirements for light-duty asbestos cement (AC) pressure pipes. It covers pipes from 80mm to 250mm nominal bore, classifying them based on their working pressure for use in water supply, irrigation, and drainage systems.

asbestos cement pressure pipes (light duty)

Quick Reference Values

Classes of pipes specifiedL1, L2, L3, L4 and L5

Working pressure for Class L5 pipe0.5 MPa (5 kgf/cm²)

Hydraulic test pressure for Class L5 pipe1.0 MPa (10 kgf/cm²)

Bursting test pressure for Class L5 pipe1.5 MPa (15 kgf/cm²)

Nominal Bore range80 mm to 250 mm

Practical Notes

This standard has been 'WITHDRAWN' by BIS. The manufacture and use of asbestos-containing products are banned or heavily restricted in India due to severe health risks like asbestosis and cancer.

This code is now only relevant for historical reference or for engineers dealing with the assessment, maintenance, or safe removal of existing old AC pipelines.

Extreme caution and specialized safety protocols must be followed when cutting, handling, or demolishing existing AC pipes to prevent the release of harmful asbestos fibers.