Standard No.:	GB/T 5486-2026
English Name:	Test methods for inorganic rigid thermal insulation products
Chinese Name:	无机硬质绝热制品试验方法
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-04-30
Implemented on:	2026-11-1
Status:	to be valid
Superseding:	GB/T 5486-2008 Test methods for inorganic rigid thermal insulation
Target Language:	English
File Format:	PDF
Word Count:	12500 words
Translation Price(USD):	375.0
Delivery:	via email in 1~5 business day

GB/T 5486-2026 Test methods for inorganic rigid thermal insulation products English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 5486-2026 Test methods for inorganic rigid thermal insulation products 无机硬质绝热制品试验方法 Issue date: 2026-03-31 Implementation date: 2026-10-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 Test Environment 5 Dimensions and Deviations 6 Appearance 7 Moisture Content 8 Density 9 Compression Performance 10 Bending Performance 11 Water Absorption 12 Uniform Temperature Burning Performance 13 Softening Coefficient 14 Test Report Test methods for inorganic rigid thermal insulation products 1 Scope This document describes the test methods for dimensions and deviations, appearance, moisture content, density, compression performance, bending performance, water absorption, uniform temperature burning performance and softening coefficient of inorganic rigid thermal insulation products. This document applies to the performance testing of inorganic rigid thermal insulation products. 2 Normative References The following document is essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 4132 Thermal insulation — Terms and definitions 3 Terms and Definitions For the purposes of this document, the terms and definitions given in GB/T 4132 and the following apply. 3.1 inorganic rigid thermal insulation products Thermal insulation products whose main components are inorganic nonmetallic materials, having certain mechanical strength and not easily bent or deformed. NOTE: Common inorganic rigid thermal insulation products include calcium silicate thermal insulation products, foam glass thermal insulation products, foamed ceramic thermal insulation products, foamed cement thermal insulation products, expanded perlite thermal insulation products, expanded vermiculite thermal insulation products, etc. 3.2 surface hole A pore with a diameter not less than 5 mm on the surface of an inorganic rigid thermal insulation product. 4 Test Environment The test environment should be a temperature of (23 ± 5) °C and a relative humidity of (50 ± 10) %. Tests may be carried out in a natural environment if the test environment is not specified. 5 Dimensions and Deviations 5.1 Instruments and equipment 5.1.1 Steel ruler: scale division not greater than 1 mm. 5.1.2 Steel tape measure: scale division not greater than 1 mm. 5.1.3 Calliper: scale division not greater than 0.02 mm. 5.1.4 π tape: scale division not greater than 0.05 mm. 5.1.5 Try square: scale division not greater than 1 mm, with at least one arm length not less than 500 mm. 5.1.6 Calliper (springjoint) 5.2 Test specimen Take a whole sample. 5.3 Test method 5.3.1 Blocks and flat plates 5.3.1.1 Length and width Using a steel ruler or steel tape measure, measure the length and width at positions 20 mm from each side on two opposite large faces of the specimen (see Figure 1). The measurement result is the arithmetic mean of the 4 measured values, rounded to the nearest 1 mm. 5.3.1.2 Thickness Using a calliper, measure the thickness at positions 20 mm from the ends and at the centre on two opposite side faces of the specimen (see Figure 1). The measurement result is the arithmetic mean of the 6 measured values, rounded to the nearest 0.5 mm. 5.3.1.3 Diagonal difference Using a steel ruler or steel tape measure, measure the lengths of the two diagonals on one large face of the specimen and calculate the difference between the two diagonals. Repeat the measurement on the other large face. The measurement result is the larger of the two diagonal differences, rounded to the nearest 1 mm. 5.3.2 Pipe shells and curved plates 5.3.2.1 Length Using a steel ruler or steel tape measure, measure the length of the pipe shell or curved plate at the centre positions of the two side faces and at the centre positions of the inner and outer curved surfaces (see Figure 2). The measurement result is the arithmetic mean of the 4 measured values, rounded to the nearest 1 mm. 5.3.2.2 Thickness Using a calliper, measure the thickness of the pipe shell or curved plate at positions 20 mm from the side faces and at the centre of the two opposite end faces (see Figure 2). The measurement result is the arithmetic mean of the 6 measured values, rounded to the nearest 0.5 mm. 5.3.2.3 Diameter The diameter may be measured and calculated using the following two methods. In case of dispute, the provisions of Method A shall apply. Method A: Assemble the pipe shells or curved plates into a complete annular pipe section. Using a calliper and steel ruler or a π tape, measure the outer diameter of the pipe shells or curved plates at positions 20 mm from the ends and at the centre of the pipe section. Rotate by 90° and repeat the above measurements. The result is the arithmetic mean of the 6 measured values, rounded to the nearest 1 mm. Ensure that the pipe section does not deform under force during measurement. The inner diameter of the test specimen is the outer diameter minus twice the thickness, with the result rounded to the nearest 1 mm. Method B: Using a steel tape measure, measure the outer arc length l₀ of the pipe shell or curved plate at positions 20 mm from the end faces and at the centre. The result is the arithmetic mean of the 3 measured values, rounded to the nearest 1 mm. Then, according to the number of pieces n forming a complete circle, calculate the outer diameter Dʷ and inner diameter Dⁿ of the pipe shell or curved plate using formula (1) and formula (2), respectively. The diameter result for the test specimen is the arithmetic mean of the measurement results of all pipe shells or curved plates forming the complete circle, rounded to the nearest 1 mm. 5.3.3 Perpendicularity deviation 5.3.3.1 Perpendicularity deviation of blocks and flat plates Place the test specimen horizontally on a flat surface. Position a try square at one corner of the specimen so that one arm of the try square contacts one side (or face) of the flat plate (or block). Use a steel ruler to measure the gap width between the other arm and the adjacent side (or face) of the specimen at a distance of 500 mm from the corner, which is the perpendicularity deviation. If the side length of the specimen is not greater than 500 mm, measure the perpendicularity deviation along the full length of the specimen (see Figure 3). Measure the perpendicularity deviation of the remaining three corners of the flat plate (or block) in the same manner. The measurement result is the maximum of the 4 perpendicularity deviations, recorded to the nearest 1 mm. 5.3.3.2 Perpendicularity deviation of pipe shells and curved plates Assemble the pipe shells or curved plates into a complete annular pipe section. Place it vertically on a flat surface. Position the right angle of a try square against the bottom of the pipe section. Move the try square around the bottom of the pipe section, and record the maximum gap between the long side of the try square and the pipe section at a distance of 500 mm from the bottom, which is the perpendicularity deviation. If the length of the pipe section is not greater than 500 mm, measure the perpendicularity deviation along the full length of the pipe section (see Figure 4). Measure the perpendicularity deviation of the other end face of the pipe section in the same manner. The measurement result is the maximum of the 2 end perpendicularity deviations, recorded to the nearest 1 mm. 5.3.4 Joint gap of pipe shells and curved plates Assemble the pipe shells or curved plates into a complete annular pipe section. Place it vertically on a flat surface. Use a steel ruler to measure the maximum joint gap of the assembled pipe shells or curved plates (see Figure 5). The measurement result is the maximum of the measured joint gap values, recorded to the nearest 1 mm. 6 Appearance