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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 3003-2006 Refractory - Ceramic fibre and the products. The following main technical changes have been made with respect to GB/T 3003-2006:
——The standard name is modified;
——Four terms, i.e. alkaline earth silicate fibre, aluminosilicate fibre, polycrystalline fibre and refractory fibre textiles, and their definitions are added (see 3.2, 3.3, 3.4 and 3.12);
——Terms of refractory fibre products are modified (see 3.5~3.11);
——The classification and identification of refractory fibres are added (see Tables 1 and 3);
——The grading temperature is changed to the maximum service temperature (see Table 2);
——The shot content of aluminosilicate bulk fibres is modified and the shot content of alkaline earth silicate bulk fibres is added (see Table 5);
——The bio-soluble index and the determination method of solubility of alkaline earth silicate fibre are added (see Table 6 and Annex B);
——The allowable deviation range of the dimension of refractory fibre felts is added (see Table 8);
——The allowable deviation range of the length and width of refractory fibre boards is modified, and the technical indexes of refractory fibre boards are added (see Tables 13 and 14);
——The moisture content of both refractory fibre boards and felts is modified (see Tables 7 and 14);
——The nominal thickness and dimensional deviation of the refractory fibre paper are modified (see Table 15);
——The loss on ignition (LOI) index of the refractory fibre paper and refractory fibre textiles is modified to organic matter content (see Tables 16 and 18);
——The yarn and packing products of refractory fibre textiles are deleted;
——Tables of the dimensional deviations and physical properties of refractory fibre textiles are added (see Tables 17 and 18);
——The detection method of chemical composition of refractory fibres and the products as specified in GB/T 21114 is added (see Clause 6);
——The detection method for the maximum force of refractory fibre tapes and refractory fibre twisted ropes is modified (see 6.3.11);
——The maximum batch size of batches of refractory fibre products is added, with the unit changed from delivery package to tonne, and the sampling frequency of refractory fibre products is added (see Clause 7).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by and is under the jurisdiction of the National Technical Committee on Refractory Material of Standardization Administration of China (SAC/TC 193).
The previous editions of this standard are as follows:
——GB/T 3003-1982 and GB/T 3003-2006.
Refractory fibres and the products
1 Scope
This standard specifies the terms and definitions, classification, grading, designation, technical requirements, test methods, quality assessment procedures, packaging marking, transportation, storage and quality certificate of refractory fibres and the products.
This standard is applicable to refractory bulk fibres, refractory fibre felts, refractory fibre blankets, refractory fibre modules, refractory fibre boards, rigid refractory fibre product and shapes, refractory fibre paper and refractory fibre textiles, among others.
2 Normative references
The following referenced documents are indispensable 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 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3007 Refractory products - Determination of moisture content
GB/T 3923.1 Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the strip method
GB/T 4984 Chemical analysis of refractories containing zirconia
GB/T 5069 Chemical analysis of magnesia-alumina refractories
GB/T 6900 Chemical analysis of alumina-silica refractories
GB/T 7689.3 Reinforcements - Test method for woven fabrics - Part 3: Determination of width and length
GB/T 9914.3 The method for reinforcement products - Part 3: Determination of mass per unit area
GB/T 11835 Rock wool, slag wool and its products for thermal insulation
GB/T 17911 Refractory products - Methods of test for ceramic fibre products
GB/T 18930 Terminology for refractories
GB/T 21114 Refractories - Chemical analysis by X-ray fluorescence (XRF) - Fused cast-bead method
FZ/T 65002 Test method for physical and mechanical properties of special industrial ropes
YB/T 4130 Refractory materials - Determination of thermal conductivity (calorimeter)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 18930 as well as the following apply.
3.1
refractory fibre
synthetic mineral fibre with service temperature above 800℃, mainly including alkaline earth silicate fibre (AEF), aluminosilicate fibre (ASF) and polycrystalline fibre (PCF)
3.2
alkaline earth silicate fibre
amorphous fibre with biological solubility, which is prepared by high-temperature melting method and is mainly composed of alkaline earth metal oxides (such as calcium oxide and magnesium oxide) and silica
3.3
aluminosilicate fibre
amorphous fibre prepared by high-temperature melting method, which is mainly composed of alumina and silica, and can be divided into two types, i.e. aluminosilicate fibre and aluminosilicate fibre containing zirconium
3.4
polycrystalline fibre
microcrystalline fibre prepared by chemical sol-gel method, in which the main crystalline phase of the fibre is mullite or corundum
3.5
refractory bulk fibre
loose refractory fibre used before preparing products
3.6
refractory fibre blanket
flexible, normally needled, refractory fibre product, free of binder, with nominally determined dimension
3.7
refractory fibre felt
flexible, fibrous refractory fibre product of nominally determined dimension, containing some proportion of inorganic and/or organic binder
3.8
refractory fibre module
refractory fibre product formed into a component used in furnace construction
3.9
refractory fibre board
rigid flat thermal insulation fibre product normally containing inorganic or organic binder, produced by a wet process
3.10
rigid refractory fibre product and shapes
special-shaped rigid product made of refractory bulk fibre containing inorganic or organic binder
3.11
refractory fibre paper
flexible refractory fibre product, produced by papermaking process
3.12
refractory fibre textiles
refractory fibre cloth, refractory fibre belt and refractory fibre twisted rope made of refractory fibre
4 Classification, grading and designation
4.1 Classification
See Table 1 for the category of refractory fibres.
Table 1 Category of refractory fibres
Alkaline earth silicate fibre Alkaline earth silicate fibre
Aluminosilicate fibre Aluminosilicate fibre
Aluminosilicate fibre containing zirconium
Polycrystalline fibre Polycrystalline fibre
4.2 Grading
4.2.1 Grading principle
The permanent linear change in dimension on heating of refractory fibre products is determined according to GB/T 17911, and the temperature at which the permanent linear change in dimension on heating does not exceed the following specified values is taken as the maximum service temperature, based on which the refractory fibre products are graded.
Refractory fibre board and rigid refractory fibre product and shapes: the permanent linear change in dimension on heating does not exceed 3%.
Soft products such as refractory bulk fibre and refractory fibre blanket, felt and paper: the permanent linear change in dimension on heating does not exceed 4%.
4.2.2 Grading
Refractory fibre products are graded from 850℃ to 1,750℃ according to the maximum service temperature when their permanent linear change in dimension on heating meets the requirements of 4.2.1. The interval is 50℃, and the maximum service temperatures are rounded down to integral times of 50, as shown in Table 2.
Table 2 Grading of refractory fibre products
Grade Maximum service temperature/℃ Test temperature for permanent linear change in dimension on heating/℃ Grade Maximum service temperature/℃ Test temperature for permanent linear change in dimension on heating/℃
085
090
095
100
105
110
115
120
125
130 850
900
950
1,000
1,050
1,100
1,150
1,200
1,250
1,300 850
900
950
1,000
1,050
1,100
1,150
1,200
1,250
1,300 135
140
145
150
155
160
165
170
175
1,350
1,400
1,450
1,500
1,550
1,600
1,650
1,700
1,750
1,350
1,400
1,450
1,500
1,550
1,600
1,650
1,700
1,750
Note: The actual maximum service temperature of refractory fibre products, in oxidizing or neutral atmosphere, 100-250 lower than the maximum service temperature, in reducing atmosphere, 200-350 lower than the maximum service temperature.
4.3 Marking
The marking of refractory fibres is expressed by the English name abbreviation of the corresponding fibre, as shown in Table 3. The main marking of refractory fibre products is composed of the English name abbreviation of the corresponding product, the first three digits of the maximum service temperature and the category, possibly followed by the auxiliary marking, as shown in Table 4.
Table 3 Marking of refractory fibre
Category of refractory fibre English name Marking
堿土硅酸鹽纖維 alkaline earth silicate fibre AEF
硅酸鋁纖維 aluminosilicate fibre ASF
多晶纖維 polycrystalline fibre PCF
Table 4 Marking of refractory fibre product
Product English name Marking
耐火纖維棉 refractory bulk fibre BF-grade-category
耐火纖維氈 refractory fibre felt RF-grade-category-dimension
耐火纖維毯 refractory fibre blanket RB-grade-category-nominal bulk density-dimension
耐火纖維模塊 refractory fibre module RM-grade-category-nominal bulk density-dimension
耐火纖維板 refractory fibre board RBD-grade-category-nominal bulk density-dimension
耐火纖維異型硬制品 rigid refractory fibre product and shapes RR-grade-category
耐火纖維紙 refractory fibre paper RP-grade-category-thickness
耐火纖維布 refractory fibre cloth RC-grade-category-thickness
耐火纖維帶 refractory fibre tape RT-grade-category-thickness-width
耐火纖維繩 refractory fibre twisted rope RTR-grade-category-(diameter/side length)(-number of strands)
5 Technical requirements
5.1 Refractory bulk fibre
The classification and technical indexes of refractory bulk fibres are shown in Table 5, and the bio-soluble index (solubility) of alkaline earth silicate fibres is shown in Table 6.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification, grading and designation
5 Technical requirements
6 Test methods
7 Quality assessment procedures
8 Packaging, marking, transportation, storage and quality certificate
Annex A (Normative) Preparation method of test samples for permanent linear change in dimension on heating of refractory bulk fibres
Annex B (Normative) Determination of solubility of alkaline earth silicate fibre in simulated lung fluid
Annex C (Normative) Determination of mass per unit length of refractory fibre twisted rope
