What is the primary purpose of IS 11770 Part 2?

To provide guidelines for controlling asbestos dust exposure in factories making friction materials (e.g., brake pads) to protect worker health.

What is the permissible exposure limit (PEL) for asbestos dust?

The code specifies a Time-Weighted Average (TWA) limit of 0.1 fibres per cubic centimeter (fibres/cm³) of air over an 8-hour period.

What is the most important engineering control method recommended?

The use of enclosed processes combined with Local Exhaust Ventilation (LEV) systems to capture asbestos dust at its source before it becomes airborne.

Is this code still relevant given the ban on asbestos?

Yes, for any facility still handling asbestos for replacement parts or specific industrial friction applications, and for managing historical contamination or waste.

IS 11770

: 2000

Recommendations for control of emission of asbestos dust in premises manufacturing products containing asbestos, Part 1: Asbestos cement products

CurrentSpecializedCode of PracticeEnvironmental · Cement Matrix Products

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This standard provides recommendations and a code of practice for controlling the emission of asbestos dust in premises manufacturing friction materials, such as brake linings and clutch facings. It focuses on protecting worker health and the environment by outlining engineering controls, work practices, air monitoring, personal protective equipment (PPE), and waste disposal procedures.

Recommendations for control of emission of asbestos dust in premises manufacturing products containing asbestos, Part 1: Asbestos cement products

Quick Reference Values

Permissible Exposure Limit (TWA) for Asbestos Fibres0.1 fibres/cm³

Minimum Air Velocity in Local Exhaust Hood1.0 m/s

Minimum Negative Pressure in Enclosures5 Pa

Medical Examination FrequencyOnce every 12 months

Practical Notes

The use of asbestos in brake pads for new vehicles has been banned in India since 2017. This code is relevant for legacy facilities, the replacement market, or specific industrial applications still using asbestos.

Effective implementation requires a combination of engineering controls (like LEV), administrative controls (work practices), and mandatory use of appropriate PPE (especially respirators).

Regular air monitoring and medical surveillance are critical legal and safety requirements for any facility operating under these guidelines.