ISO/TR 10295-3:2012

Overview

ISO/TR 10295-3:2012 is a Technical Report from ISO that provides guidance for fire testing single component penetration seals. It defines a structured method to characterise sealing materials using standard test configurations and simulated services (steel rods representing pipes/cables) under the ISO 834-1 fire exposure. The aim is to identify failure modes and the critical parameters that determine a seal’s fire performance so that a direct and extended field of application can be established for classification and specification purposes.

Key topics and requirements

• Scope and intent: Guidance for single component penetration seals where the service does not melt out during a fully developed fire. Not suitable for multi‑component systems, pipe collars/closers or some gland systems (use ISO 10295-1 instead).
• Standardised test configurations: A series of configurations (Test configurations A–D and procedures E–H) designed to probe different performance parameters such as unsupported free area, thermal diffusivity of the conductor, and multiple simulated services.
• Test rig and instrumentation:
  • Furnace internal minimum dimensions: 1 m × 1 m × 1 m, with ≥200 mm clearance between seal edge and furnace wall.
  • Simulated service supported 400–450 mm from unexposed face.
  • Thermocouple fixed to simulated service at 50 mm from unexposed face to monitor temperature; cotton pad test is discontinued once simulated service temperature reaches 300 °C.
• Data analysis methods:
  • Derivation of direct and extended fields of application by judgemental and mathematical analysis, including a 3‑D interpolation method and guidance referencing ISO/TR 12470.
• Performance criteria: Focus on identifying mode of failure (melting, slumping, charring, etc.) and critical parameters (penetration size, free space, conductor thermal properties) that affect fire resistance.

Practical applications and users

Who uses ISO/TR 10295-3:2012:

• Fire test laboratories conducting standardized fire resistance tests on penetration seals.
• Manufacturers developing single component firestop systems (sealants, intumescent strips, rigid boards, cementitious fillers).
• Fire safety engineers, specifiers and authorities assessing seal performance, establishing fields of application, or preparing product specifications.
• Product certifiers and building designers who need quantitative data to justify extrapolation/interpolation of test results to real installations.

Benefits:

• Provides reproducible test methods to characterise sealing materials.
• Enables informed extension of test results to different penetration sizes and service types.
• Assists product development and classification of firestop products.

Related standards

• ISO 834-1 - fire-resistance test general requirements (furnace/time-temperature curve)
• ISO 10295-1 / ISO 10295-2 - penetration seals and linear joint seals
• ISO/TR 12470 - guidance on application and extension of test results
• ISO 13943 - fire safety vocabulary

Keywords: ISO/TR 10295-3:2012, fire tests, penetration seals, single component, simulated services, test configurations, fire resistance, 3‑D interpolation, ISO 834-1.