*(ISO 8143:2010, Thermal insulation products for building equipment and industrial installations—Calcium silicate products, NEQ)*
This standard specifies the terms and definitions, classification, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of calcium silicate thermal insulation products.It is applicable to calcium silicate thermal insulation products used in various equipment, kilns, pipelines, and their accessories with hot surface temperatures not exceeding 1000°C.*Note: For applications below ambient temperature, special measures are recommended.*
The following documents are essential for the application of this document. For dated references, only the edition cited applies.For undated references, the latest edition (including all amendments) applies.
The terms and definitions defined in GB/T 4132 and the following apply to this document.
A crack penetrates the product in any direction (length, width, or thickness).
4.1.1 According to the maximum service temperature: Type I (650°C), Type II (1000°C).
4.1.2 According to product density: Type I includes 240, 220, and 170 grades; Type II includes 270, 220, 170, and 150 grades. Special density products can be provided as per agreement between supplier and customer.
Classified by shape into flat boards, curved boards, and pipe sections.
The marking sequence is product name, variety, shape, length × width (inner diameter) × thickness, and this standard number.maximum service temperature is indicated by I or II; flat board, pipe section, and curved board are represented by P, G, and H respectively.
Example:
A flat board with a length of 600 mm, width of 300 mm, thickness of 60 mm, 220 grade, and maximum service temperature of 1000°C is marked as:
Calcium Silicate Thermal Insulation II220P 600×300×60 GB/T 10699—2015
5.1.1.1 The product shall have no edge defects with a length exceeding 30 mm and a depth exceeding 10 mm, nor corner defects with an edge length exceeding 20 mm and a depth exceeding 10 mm.
5.1.1.2 Edge damage with a depth not greater than 3 mm and corner damage with a depth not greater than 4 mm are not considered surface defects.
5.1.1.3 The total number of defects falling between the dimensions specified in 5.1.1.1 and 5.1.1.2 shall not exceed four, with no more than two being corner defects.
5.1.1.4 The product shall be free from through cracks.
The deviation between the local thickness at any measurement point and the average thickness of the product shall not exceed 3 mm.
5.1.3.1 For board-shaped products, the perpendicularity deviation in the length and width directions shall not exceed 6 mm/m, and in the thickness direction shall not exceed 2 mm/m.
5.1.3.2 For pipe section products, the end perpendicularity deviation shall not exceed 3 mm/m.
5.1.4.1 For flat board products, the warping shall not exceed 0.5% of the length (or width) or 3 mm, whichever is greater.
5.1.4.2 For curved board and pipe section products, the longitudinal warping shall not exceed 0.5% of the product length or 3 mm, whichever is greater.
Based on the specified nominal dimensions, the allowable dimensional tolerances of the products shall comply with the requirements in Table 1.
Table 1 Dimensional Tolerances
Table 2 Physical Property Indicators
Calcium silicate itself is a non-combustible material. Products reinforced with organic fibers shall achieve a combustion performance rating of Class A (A1) as specified in GB 8624-2012.
Most calcium silicate insulation products contain trace amounts of water-soluble chlorides and other halides, as well as sodium ions. When used with austenitic stainless steel, they shall meet the requirements of GB/T 17393. Upon user request, test data on soluble ion content and leachate pH shall be provided.
For products requiring hydrophobic properties, the hydrophobic rate shall be greater than 98%, and other physical property indicators shall still meet the requirements specified in Table 2.
The product shall be asbestos-free.
Test according to Chapter 5 of GB/T 5486-2008. Thickness uniformity is determined by the difference between the thickness at any measurement point and the average thickness of the same specimen.
Test according to Chapter 4 of GB/T 5486-2008. Dimensional deviation is the difference between the arithmetic mean of measurements in the same direction on a specimen and its nominal dimension.
Test according to Chapter 8 of GB/T 5486-2008.
Test according to GB/T 30806. Test conditions: temperature (23±2)℃, relative humidity (90±5)%, duration 48 hours.
Test according to Chapter 10 of GB/T 5486-2008. Firing temperature: Type I at 650℃, Type II at 1000℃; holding time: 16 hours.
Test according to GB/T 10294, GB/T 10295, GB/T 10296. For temperatures above 300℃, test according to GB/T 10297. GB/T 10294 is the arbitration method.
Test according to Chapter 6 of GB/T 5486-2008.
Test according to Chapter 7 of GB/T 5486-2008.
In accordance with GB/T 5464 and GB/T 14402.
Soluble ion content is determined according to JC/T 618; leachate pH value and corrosiveness are determined according to GB/T 17393.
In accordance with GB/T 10299.
In accordance with Appendix A of HJ/T 206-2005.
Factory inspection items include: appearance quality, dimensional tolerances, density, moisture content by mass, and compressive strength.
Type inspection items encompass all items specified in Chapter 5. Type inspection should be conducted under any of the following circumstances:
a) During trial production for new products or when existing products are transferred to a new manufacturing facility;
b) After formal production, when significant changes in raw materials or processes may affect product performance;
c) During regular production, at least once a year;
d) When production resumes after a shutdown of six months or more;
e) When routine inspection results differ significantly from the previous type inspection.
A batch consists of products of the same variety produced continuously using the same raw materials, formulation, and stable production process. The production period for a single batch should not exceed one week.
7.2.2.1 Sample Selection
Samples should be randomly selected from qualified products. For appearance quality and dimensional tolerance inspections, sample sizes are determined as specified in Table 3. In Table 3, batch size and sample size refer to the number of boards or blocks or the number of complete pipe sections. For physical performance tests, specimens are randomly selected from samples that have passed appearance quality inspection, according to the quantity specified in the respective test method standards.
7.2.2.2 Sampling Plan
The double sampling plan is shown in Table 3.
Table 3 Sampling Plan and Decision Rules for Attribute Inspection
7.3.1 Appearance quality and dimensional tolerances are evaluated according to Table 3.
7.3.2 A batch is deemed conforming if all inspection items meet the requirements specified in Chapter 5; otherwise, it is deemed non-conforming.
Products leaving the factory should be accompanied by a quality certificate clearly indicating nominal values. Each package should be labeled with the product designation, quantity, manufacturer’s name and address, and production date.
Products should be packed in cartons with moisture-proofing and anti-loosening measures. Packaging should be marked with “Handle with Care” and “Keep Dry” symbols in accordance with GB/T 191.
During transportation, products should be protected from moisture. Loading and unloading should be handled with care.
Products should be stored indoors, elevated from the ground, and sorted by variety. Storage areas should be solid, dry, and level.
