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https://asfp.org.uk/
Email: info@asfp.org.uk

Advisory Notes 2 Firestopping combustible pipes with an internal diameter of 40 mm or less

Publication Year

2026

Document Status

Current

Abstract

Provides ASFP recommendations for use, and guidance on the general principles of firestopping. Specifically relates to the requirements for combustible pipes with an internal diameter of 40 mm or less. Includes test evidence.

Document History

Current issue: January 2026. Supersedes: Advisory Note 2 Firestopping of combustible pipes with an internal diameter of 40 mm or less (ASFP, 2010).

Publisher Information

Association for Specialist Fire Protection

Formed in 1975, the Association for Specialist Fire Protection currently represents the major U.K. based specialist manufacturers and installers of structural passive fire protection systems. They produce technical information to ensure built in fire protection in buildings.