Is this standard still in use?

No, IS 6908:1991 has been officially withdrawn by BIS and should not be used for new projects.

Why was this standard withdrawn?

Due to the established health hazards associated with asbestos fibres, leading to a phase-out of asbestos-based construction materials.

What was the primary strength requirement for these pipes?

The Crushing Strength Test (Clause 6.4), which ensures the pipe can withstand external loads from soil and traffic when buried.

What are the modern alternatives for asbestos cement sewer pipes?

Commonly used alternatives are PVC pipes (conforming to IS 4985), HDPE pipes, and Reinforced Concrete (RCC) pipes (conforming to IS 458).

IS 6908

: 1991

asbestos cement pipes and fittings for sewerage and drainage

CurrentRareSpecificationWater Resources · Cement Matrix Products

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This standard specifies the requirements for asbestos cement pipes and fittings used in non-pressure applications like sewerage and drainage. It covers material composition, dimensions, physical properties like crushing strength and water tightness, and testing methods. This standard has been withdrawn.

asbestos cement pipes and fittings for sewerage and drainage

Quick Reference Values

Hydraulic Proof Test Pressure0.05 MPa

Minimum Crushing Strength (100 mm dia pipe)34 kN/m

Maximum Water Absorption28%

Bending Moment Resistance (100 mm dia pipe)1.3 kN.m

Practical Notes

This standard is 'Withdrawn' by BIS. The use of asbestos-containing materials is now highly restricted or banned in many applications due to severe health risks (asbestosis, mesothelioma).

Modern alternatives like PVC (IS 4985), HDPE, and RCC (IS 458) pipes are used for sewerage and drainage applications.

Handling or removing existing AC pipes requires special safety precautions and disposal procedures as per environmental regulations.