NVLAP and the Thermal Insulation Proficiency Testing Program

Horlick, J; Berger, Harvey W

doi:10.1177/109719638500800405

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…The NVLAP methodology for proficiency testing was/is to provide participating laboratories proficiency specimens having properties not known in advance. For example, in Round 6, June 1981 [ 13 ], NVLAP utilized a nominal 25.4 mm thick, 64 kg·m −3 foil-faced fibrous-glass board for test methods C 177 and C 518. This particular material was fabricated from a separate lot of material than those described in this paper.…”

Section: Table A1mentioning

confidence: 99%

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Retrospective Analysis of NIST Standard Reference Material 1450, Fibrous Glass Board, for Thermal Insulation Measurements

Zarr¹,

Heckert²,

Leigh³

2014

J. RES. NATL. INST. STAN.

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Thermal conductivity data acquired previously for the establishment of Standard Reference Material (SRM) 1450, Fibrous Glass Board, as well as subsequent renewals 1450a, 1450b, 1450c, and 1450d, are re-analyzed collectively and as individual data sets. Additional data sets for proto-1450 material lots are also included in the analysis. The data cover 36 years of activity by the National Institute of Standards and Technology (NIST) in developing and providing thermal insulation SRMs, specifically high-density molded fibrous-glass board, to the public. Collectively, the data sets cover two nominal thicknesses of 13 mm and 25 mm, bulk densities from 60 kg·m−3 to 180 kg·m−3, and mean temperatures from 100 K to 340 K. The analysis repetitively fits six models to the individual data sets. The most general form of the nested set of multilinear models used is given in the following equation: λ(ρ,T)=a0+a1ρ+a2T+a3T3+a4e−(T−a5a6)2where λ(ρ,T) is the predicted thermal conductivity (W·m−1·K−1), ρ is the bulk density (kg·m−3), T is the mean temperature (K) and ai (for i = 1, 2, … 6) are the regression coefficients. The least squares fit results for each model across all data sets are analyzed using both graphical and analytic techniques. The prevailing generic model for the majority of data sets is the bilinear model in ρ and T. λ(ρ,T)=a0+a1ρ+a2TOne data set supports the inclusion of a cubic temperature term and two data sets with low-temperature data support the inclusion of an exponential term in T to improve the model predictions. Physical interpretations of the model function terms are described. Recommendations for future renewals of SRM 1450 are provided. An Addendum provides historical background on the origin of this SRM and the influence of the SRM on external measurement programs.

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Section: Table A1mentioning

confidence: 99%

“…The first laboratory accreditation program for thermal insulation was initiated in 1977 in response to a request from three thermal insulation trade associations [ 11 ]. The data and analyses for the insulation proficiency testing programs, rounds 1–3, were published in 1983 [ 12 ]; rounds 3–10 in 1985 [ 13 ]; and, rounds 11–30 in 2010 [ 14 ].…”

mentioning

confidence: 99%

Retrospective Analysis of NIST Standard Reference Material 1450, Fibrous Glass Board, for Thermal Insulation Measurements

Zarr¹,

Heckert²,

Leigh³

2014

J. RES. NATL. INST. STAN.

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Round Robin Fire Safety Tests on Cellulose Insulation Testing Program: Round 2

Siddiqui¹

1987

Journal of Thermal Insulation

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This paper describes the California Bureau of Home Furmshmgs -Insulation Program round robin fire safety, second round testing results for Cellulose Insulation material. The results of the California Bureau of Home Furnishings proficiency testing program from manufacturer's in-house quality control testing laboratories and other National Voluntary Laboratory Accreditation Program (NVLAP) accredited laboratories are given. Tables show the statistical results of data submitted by participating laboratories for critical radiant flux and smoldering combustion. KEY WORDS

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Summary of Low-Density Glass-Fiber Reference Materials at NIST: 1980-1989

Zarr

1991

Journal of Thermal Insulation

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This paper reviews three programs at the National Institute of Stan dards and Technology (NIST) that provide specimens of low-density glass-fiber in sulation as reference materials. The National Voluntary Laboratory Accreditation Program (NVLAP) provides specimens as Proficiency Test Materials, the Standard Reference Materials Program (SRMP), as Standard Reference Materials; and the Center for Building Technology (CBT), as Calibrated Transfer Specimens. The pro grams of SRMP and CBT arc summarized for the years 1980 to 1989 The paper in cludes a catalogue of NIST publications covering the technical development of the low-density glass-fiber insulation used in the programs of NVLAP, SRMP and CBT.

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NVLAP and the Thermal Insulation Proficiency Testing Program

Cited by 4 publications

References 3 publications

Retrospective Analysis of NIST Standard Reference Material 1450, Fibrous Glass Board, for Thermal Insulation Measurements

Retrospective Analysis of NIST Standard Reference Material 1450, Fibrous Glass Board, for Thermal Insulation Measurements

Round Robin Fire Safety Tests on Cellulose Insulation Testing Program: Round 2

Summary of Low-Density Glass-Fiber Reference Materials at NIST: 1980-1989

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