T/YXNX 003-2021 Active Group standards

T/YXNX 003-2021 Fire-resistant Materials Load Softening Temperature (Non-Differential Heating Method) Quality Control Methods for Testing Results

T/YXNX 003-2021

Publish Date: 2021-12-01 Implement Date: 2021-12-10 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/YXNX 003-2021

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Fire-resistant materials

ICS Name: Mineral materials and products

Publish Date: 2021-12-01

Implement Date: 2021-12-10

Scope

Scope: This document specifies the scope, normative references, terms and definitions, equipment requirements, quality control methods, and quality control analysis and archiving for the detection of the load softening temperature (non-differential heating method) of refractory materials in testing laboratories. This document is applicable to the quality control of the detection results of the load softening temperature (non-differential heating method) of refractory materials in testing laboratories; Main technical content: Quality control methods 1. Standard sample comparison: For laboratories that can obtain quartz standard samples, the test should be conducted using quartz glass standard samples (standard value of 1386 ℃), and the deviation of the measurement result from the standard value should not exceed the expanded uncertainty of the standard sample (). 2. Reproducibility testing (1) Sample preparation: To ensure the uniformity and consistency of the samples, the test samples should be drilled from adjacent parts of the same appearance-inspected standard refractory products in the same laboratory, and the height direction of the samples should be the pressing direction during the product molding. The drilling location is shown in Figure 1, taking 2 and 4 samples as examples. The samples are cylindrical, with a diameter of (36±0.5) mm and a height of (50±0.5) mm; the flatness and parallelism of the two bottom surfaces should not exceed 0.2 mm, and the perpendicularity of the bottom surfaces to the spindle should not exceed 0.4 mm. If any defects such as layer cracking, soluble caves, or cracks are found in the samples, another brick should be used for re-sampling. (2) Laboratory internal quality control methods, including: a) For laboratories with one load softening tester, the same laboratory should use the same instrument for repeat testing of different samples of the same standard refractory product, and the error between the two test results sh