Performance of Different Temperature Sensors in Standard Fire Resistance Test Furnaces

Sultan, Mohamed A.

doi:10.1007/s10694-010-0166-9

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…The shielded thermocouples has slow temperature response time at the first 10 minutes of fire test, although the plate thermocouples has faster response time, but they have a short life span [17]. The criteria for acceptability shall be individually applied to all design temperatures included in the scope of the assessment in 50 °C steps, starting at 50 °C below the minimum temperature within the scope or 350 °C, whichever is the higher, up to the maximum temperature within the scope.…”

Section: Test Methodsmentioning

confidence: 99%

An Investigation into the Effect of Different Standard Instructions on the Fire Resistance Rating of Intumescent Coated Steel Sections

Zaki

Elkady

Khalaf

et al. 2022

AMM

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Many building members such as walls, columns, floor contains various components and materials that should be designed to meet their legal obligations outlined in the building regulations especially for fire safety requirements. The performance of those materials under fire-exposure conditions is of major importance in securing safe constructions. To evaluate the conformity of these structural elements, it is necessary to determine the fire-resistance rating as specified according to a wide range of European, American and other test standards. A comparative study was conducted between NFPA 251 and EN 13381-8 to investigate the contribution of the difference in standard specification conditions in affecting the measured fire rating time. For this purpose, six steel columns (of IPE 360 designation) were coated with intumescent paint at the same dry film thickness (DFT) to evaluate the fire resistance rating considering the conditions that listed in both NFPA 251 and EN13381-8. The results showed that the furnace time temperature curves for both standards were functionally equivalent since the standard deviations don’t exceed 5%. Variations in the fire ratings (representing 9% up to 20% of the test time) attributed to the increased temperature sensing locations which provide comparable readings with lesser deviations/ scattering.

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Section: Test Methodsmentioning

confidence: 99%

An Investigation into the Effect of Different Standard Instructions on the Fire Resistance Rating of Intumescent Coated Steel Sections

Zaki

Elkady

Khalaf

et al. 2022

AMM

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“…The furnace temperature of the ASTM E119 fire test is controlled by shielded thermocouples, 4 while the furnace temperature of the ISO 834 fire test is controlled by plate thermometers 5 . The difference in the response time of the sensors results in higher temperatures and incident heat flux during the ASTM E119 fire test during the first 10 min; however, the differences in temperature become negligible after 10 minutes 18 . Consequently, the charring rates of timber exposed to a particular standard fire curve can be compared with the charring rate of timber exposed to other standard fire curves, as well as to the constant charring rates specified in Eurocode 5 2…”

Section: Timber Fire Tests From the Literaturementioning

confidence: 99%

Review of the charring rates of different timber species

Liu

Fischer

2023

Fire and Materials

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During a fire, the load‐carrying cross section of timber members will reduce due to charring. This article summarizes experimental investigations into the charring rate of different timber species under standard fire conditions, identifies material properties that contribute to the variations of char rates across the different species, and evaluates the applicability of prescribed charring rates to solid timber, cross‐laminated timber (CLT), and glulam exposed to standard fires. Data from the literature showed that density had the greatest impact on charring rate. The charring rate of timber decreased with increasing density, particularly timber densities >700 kg/m3. Prescribed charring rates from current design standards provide reasonable estimates of the average charring rate of timber with densities <700 kg/m3 exposed to standard fire curves. A linear charring rate of 0.65 mm/min was found to be suitable for CLT and glulam exposed to a standard fire for up to 180 min if the CLT did not experience char fall‐off. The National Design Specification nonlinear charring model may underestimate the char depth of glulam exposed to standard fire curves for longer than 60 min; however, the percent underestimation was small and limited data was available. The review demonstrated the need for data on the char depths of glulam and CLT exposed to standard fire curves for longer than 60 min and particularly for longer than 120 min.

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“…The temperature data is obtained from an experimental work by Sultan et al [12]. The temperature profiles at the front and backside of the DFT are shown in Fig.…”

Section: Dft Field Data Analysismentioning

confidence: 99%

“…Lam and Weckman [11] examined the steady state response of four heat flux gauges including DFTs under various radiative and convective conditions and compared the results. In another study, Sultan [12] investigated the performance of six different temperature sensors in fire resistance test. The result showed that all the sensors yield similar results after approximately 10 min.…”

Section: Introductionmentioning

confidence: 99%