This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of clay insulation refractory products for resistance furnaces. This standard is applicable to products whose working temperature is lower than the load softening start temperature of each type. JB/T 3649.3-1994 Refractory products for resistance furnaces Clay insulation refractory products JB/T3649.3-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3649.3
1994-12-09
1995-06-01Xiaohuang
Jia Kui Ji
Ji Jia Xin Kui Lu Wa Yi Dao
JB/T3649.31994
JB3649.31984
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of clay heat-insulating refractory products for resistance furnaces (hereinafter referred to as products).
This standard applies to products whose working temperature is lower than the load softening start temperature of each variety. 2 Reference standards
GB2992
GB2998
GB 3994
GB 3997. 1
GB 3997. 2
GB5989
GB5990
Shape and size of general refractory bricks
Test method for bulk density and true porosity of shaped refractory products Clay insulating refractory bricks
Test method for line change of shaped insulating refractory products after reburning Force method Test method for compressive strength of shaped insulating refractory products at temperature Force method Test method for softening temperature under load of dense shaped refractory products Test method for heat seeking coefficient of shaped insulating refractory products (hot wire method) GB 6900. 1~6900. 4
Chemical analysis methods for clay and high-alumina refractories GB7321
GB10325
GB 10326
GB/T 3648. 1
JB/T 3649. 5
3Product classification
Specialization for sample preparation of dense shaped refractory products Testing rules for stacking, sampling, acceptance, storage and transportation of refractory products Inspection methods for dimensions, appearance and cross-section of refractory products Testing methods for refractory products for electrical insulation Thermal shock stability of shaped insulating refractory products Refractory products for electric furnaces Alumina insulating refractory products 3.1 Varieties and specifications
Products are divided into five varieties according to density: RNG-1.3, RNG--1.0, RNG-0.8, RNG0.6 and RNG.--0.4. 3.2 The shape and size of the products shall comply with the provisions of GB2992. Products not specified in the regulations can be manufactured according to the purchaser's drawings. 3.3 The model of the product should be compiled according to the following regulations, and the density should be the main parameter in the model. The model of the product consists of the following parts: R
NG-OO-
Enterprise code
Technical level code, I or [
Indicates product density, g/cm3
Indicates thermal insulation products
Indicates clay
Indicates for resistance furnaces
3.4 ​​Products are divided into two levels, I and II, according to the allowable size deviation and appearance, pole key
1994-12-09 tumor
1995-06-01 small
JB/T3649.3
3.5 The classification of products is in accordance with Article 1.3 of (B3994. 4 Technical requirements
4. 1 The physical and chemical indicators of the product shall comply with the requirements of Table 1. Table
Width g/cm2
0.1MPaLoad softening piece initial
Temperature,
Temperature℃
Load change
Time h
Thermal stability times,2
Compressive strength at room temperature,MPa,≥
Thermal conductivity
Average strength.℃
W/(mK)
1. 3±0. 05
1.0±0.05
0.8±0.05
350±25
0. 6±0.05
RNG -0. -1
0. 4±0. 05
The allowable size deviation and appearance of the product shall comply with the provisions of Table 2. For the products that have been machine-shaped, the allowable size deviation and appearance shall comply with the corresponding provisions of 4.2bZxz.net
JB/T3649.5,
Allowable size deviation
Dimension length
Dedication angle "depth
Diameter of melt hole
Crack length"
Length (--edge), %
Strike width
>100-250
>250~400
>250~100
≥ 0. 25 ~ 0. 50
>0. 50~-1. 0
Agreed by the supply and demand parties
Agreed by the supply and demand parties
Restrictions (not allowed to form a network)
Not difficult to have
JB/T3649.3
Note, 1) The missing corners and missing parts on the same working surface cannot exceed two places, 2) The same crack cannot span two schools,
4.3 The cross-sectional layer cracking of the product shall comply with the provisions of Table 3, Table 3
Cross-sectional layer cracking degree
>0. 50~ 2. 00
The product should not have a core.
4.5 The product should not have a hole with a diameter greater than 10mm. 20
Fractural delamination length
Not allowed
4.6 The thermal conductivity and thermal shock stability of the product shall be measured, and the results shall be indicated in the product certificate, but shall not be used as delivery acceptance conditions. 5 Test methods
5.1 The sampling of products shall be in accordance with the provisions of Chapter 3 of GB10325. 10 pieces of each batch of products shall be taken for physical and chemical inspection, and 10 pieces shall be taken for appearance inspection. 5.2 The cutting of product samples shall be in accordance with the provisions of CB7321. 5.3 Chemical analysis shall be in accordance with the provisions of GB6900.1~6900.3. 5.4 Density inspection shall be in accordance with the provisions of GB2998. 5.5 The inspection of load softening temperature shall be in accordance with the provisions of GB5989, but the load shall be changed from 0.2MPa to 0.1MPa. After each sampling, the density of the sample must be re-tested and filled in the test record.
5.6 The inspection of the change of the reburning line shall be in accordance with the provisions of GB3997.1. 5.7 The inspection of thermal shock stability shall be in accordance with JB/T3648.1. 5.8 The inspection of compressive strength at room temperature shall be in accordance with GB 3997.2. 5.9 The determination of thermal conductivity shall be in accordance with GB6990. 5.10 The inspection of the appearance, size and section of the product shall be in accordance with GB10326. 6 Inspection rules
6.1 The inspection rules of products shall be in accordance with Chapter 4 of GB3994 (NG is changed to RNG). 6.2 Each batch of products (including small batches) shall be accompanied by a product certificate of conformity when leaving the factory. Marking, packaging, transportation and storage
Product marking shall include the following items.
Manufacturer name,
Product name and model:
Product weight+
Technical level mark,
e. Trademark:
Manufacture date or batch number.
7T.2 Packaging
According to Article 5.2 of GB3994
7.3 Transportation
According to Article 5.3 of GB3994
According to Article 5.4 of GB3994.
Additional Notes:
JB/T3649.3
This standard is proposed by the National Technical Committee for Standardization of Industrial Electric Heating Equipment. This standard is under the jurisdiction of Xi'an Electric Furnace Research Institute of the Ministry of Machinery Industry. 1994
This standard was drafted by Xi'an Electric Furnace Research Institute, Shanghai Electric Furnace Refractory Material Factory, Yixing Port Refractory Electric Porcelain Factory No. 2, and Dongtai Refractory Equipment Factory.
The main drafters of this standard are Cao Wenxiu, Zhu Suoyuan, Wang Jusen, Shao Xibin, Ying Shengcai, 4
JB/T3649.3
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19XXXX Ridge
100044
Dai Duan X/X
Zhang Ju XXX,XXX
19XX Collection XX Cabin
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De pxXX.XX Wing
Xian Ji Lotus Snapper
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