ASTM E1474-22 PDF

Full title and description

Standard Test Method for Determining the Heat Release Rate of Upholstered Furniture and Mattress Components or Composites Using a Bench Scale Oxygen Consumption Calorimeter. This ASTM test method (E1474-22) defines a bench‑scale procedure using an oxygen‑consumption (cone) calorimeter to quantify ignitability, time to sustained flaming, heat release rate (HRR), peak and total heat release, and effective heat of combustion for combinations of outer‑layer components used in upholstered furniture and mattresses.

Abstract

ASTM E1474-22 specifies a small‑scale calorimeter test for assessing flaming behavior and heat release from composites formed from upholstery and mattress outer layers. Tests are performed on bench‑scale specimens (frame elements excluded), oriented horizontally, exposed to a prescribed initial heat flux (commonly 35 kW/m²) and ignited with a spark source. Measured outputs include time to sustained flaming, HRR versus time, peak HRR, total heat release, and effective heat of combustion. The method references and uses instrumentation and calculation procedures consistent with Test Method E1354.

General information

• Status: Active (current standard)
• Publication date: April 1, 2022
• Publisher: ASTM International
• ICS / categories: 13.220.40; 97.140
• Edition / version: E1474-22 (2022)
• Number of pages: 15

Scope

This fire‑test‑response method is intended to determine ignitability and heat release from composites of contract, institutional, or high‑risk occupancy upholstered furniture or mattresses using a bench‑scale oxygen consumption calorimeter. It provides for measurement of time to sustained flaming, heat release rate (HRR) profiles, peak and total heat release, and effective heat of combustion at a constant initial test heat flux (typically 35 kW/m²) and can be used at other fluxes as required. The method applies to outer layer components and composites; structural frame elements are not included. Results are intended for comparative assessment and product development, not as a full prediction of behavior in real fire scenarios.

Key topics and requirements

• Use of a bench‑scale oxygen consumption (cone) calorimeter following procedures of ASTM E1354.
• Specimen orientation: horizontal; ignition by spark igniter; standard initial heat flux 35 kW/m² (other fluxes permitted).
• Measured endpoints: time to sustained flaming, HRR vs. time, peak HRR, total heat released, effective heat of combustion.
• Specimen scope: combinations of outer‑layer furniture or mattress components (no frame elements).
• Test limitations and invalidation criteria: explosive spalling or specimen swelling that contacts the ignition device or heater plane invalidate results.
• Data use: comparative design, product development, and evaluation of component changes; not a standalone fire‑risk assessment.

Typical use and users

Used by product designers, fire‑safety engineers, test laboratories, upholstery and mattress manufacturers, regulatory and compliance specialists, and research organizations to evaluate and compare fire performance of cover fabrics, foams, barriers, and assembled outer layers. Typical applications include pre‑production screening, material selection, assessment of design changes, and supporting compliance work when small‑scale calorimetry data are requested.

Related standards

Closely related standards and test methods include ASTM E1354 (Standard Test Method for Heat and Visible Smoke Release Rates for Materials and Products Using an Oxygen Consumption Calorimeter), ASTM E1537 (Fire Testing of Upholstered Furniture — full/large‑scale methods), NFPA 266, California Technical Bulletin 133, 16 CFR Part 1634 (U.S. residential upholstered furniture requirements), BS 5852 and EN 1021 series (European upholstered furniture ignitability tests). These standards are often used together to provide both small‑scale calorimetric data and larger‑scale or regulatory test results.

Keywords

heat release rate, HRR, oxygen‑consumption calorimeter, cone calorimeter, upholstered furniture, mattress, ignition, heat flux, bench‑scale test, E1354, fire test response, peak heat release, total heat release

FAQ

Q: What is this standard?

A: ASTM E1474-22 is a bench‑scale test method for determining the heat release characteristics and time to sustained flaming of upholstery and mattress outer‑layer composites using an oxygen‑consumption calorimeter.

Q: What does it cover?

A: It covers specimen preparation and orientation, instrumentation and operating conditions (commonly 35 kW/m² initial heat flux), ignition method, measurement and calculation of heat release rate, peak and total heat release, effective heat of combustion, and the conditions under which test data are invalid.

Q: Who typically uses it?

A: Manufacturers, laboratory technicians, fire and product safety engineers, regulatory compliance teams, and researchers use it for material selection, product development, comparative testing, and supporting broader fire performance evaluations.

Q: Is it current or superseded?

A: E1474-22 is the current approved edition published April 1, 2022. It replaced prior editions (for example E1474-21/E1474-20A) and is the active version for bench‑scale heat release testing of upholstery/mattress components.

Q: Is it part of a series?

A: Yes. E1474 is part of a family of ASTM fire‑test standards maintained by Committee E05 (Subcommittee E05.21) and is closely linked to Test Method E1354 and other upholstered furniture fire tests (e.g., E1537). It sits within the broader set of standards for measuring heat and smoke release and evaluating furniture ignitability.

Q: What are the key keywords?

A: Heat release rate, oxygen‑consumption calorimetry, cone calorimeter, upholstered furniture, mattress components, ignition, heat flux, peak HRR, total heat release, effective heat of combustion, bench‑scale.