This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of alumina thermal insulation refractory products for resistance furnaces. This standard applies to products with working temperatures lower than the reburning line change temperature of each variety. JB/T 3649.5-1994 Refractory products for resistance furnaces Alumina thermal insulation refractory products JB/T3649.5-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3649.5bZxz.net
1994-12-09
Ji Kui Ji
1995-06-01 Xiao Huang
Ji Jia Xin Kui Lu Wa Yi Xian
JB/T3649.51994
JB3649.51984
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of alumina thermal insulation refractory products for resistance furnaces (hereinafter referred to as products).
This standard applies to products whose working temperature is lower than the reburning line change temperature of each variety. 2 Reference standards
GR2992
GR 2998
GB3995
GB 3997. 1
GB 3997.2
GB5990
Shape and size of general refractory bricks
Test method for bulk density and true porosity of shaped heat-insulating refractory products High-alumina heat-insulating refractory bricks
Test method for line change of shaped heat-insulating refractory products after reburning Test method for compressive strength of shaped heat-insulating refractory products at room temperature Test method for thermal conductivity of shaped heat-insulating refractory products (hot wire method) Chemical analysis methods for clay and high-alumina refractories GB 6900.1~6500. 4
GB7321
GB10325
GB10326
3 Product classification
3.1 Variety specifications
Specialization of dense shaped refractory products for testing Rules for sample preparation, sampling, acceptance, storage and transportation of refractory products Methods for inspection of dimensions, appearance and cross-section of refractory products Products are divided into three varieties according to density: RYG0.8, RYG0.6 and RYG-0.4. 3.2 The shape and size of the product shall comply with the provisions of GB2992. Products not specified in the provisions may be manufactured according to the purchaser's drawings 3.3 The model of the product shall be compiled in accordance with the following provisions, and the density shall be used as the main reference in the model Number. The model of the product consists of the following parts: R
Enterprise code
Indicates product density, g/cm3
Indicates thermal insulation products
Indicates alumina
Indicates for resistance furnace
3.4 ​​The classification of products shall comply with the provisions of GB3995 Section 1.3. 4 Technical requirements
1994-12-09 Tumor
1995-06-01 Small cable
The physical and chemical indicators of the product shall comply with the provisions of Table 1. Item
Density g/cm
Reburning line change!
Room temperature compressive strength, MParProduct
0.Name± 0. 05
JB/T3649.5
RYG—0. 6
0. 6±0. 04
0. 4±0. 04
4.2 The thermal conductivity of the product should be measured and the result should be indicated in the product certificate. It does not seem to be a case of delivery acceptance. 4.3 The allowable dimensional deviation and appearance of the product should comply with the requirements of Table 2. Table 2
Dimension tolerance
Dimension length
Degree of imperfection
Length of crack
Length (edge), X
Degree, %
Crack width
Note: 1) The same crack cannot cross two coins. 4.4 Cross-sectional cracking of products:
>10~250
>250~～400
When the width is less than or equal to 0.5 mm, the length is not limited;
The supplier and the buyer shall agree
! Not shading (not allowed to form a mesh)
Not allowed||b. When the width is greater than 0.5 to 2.0 mm, the length shall not exceed 30 mm, and for RYG-0.4, the length shall not exceed 60 mm. 4.5 The product shall not have a melt hole.
The product should not have cavities with a diameter greater than 10 mm. Test method
The sampling of products shall be in accordance with the provisions of Chapter 3 of GB10325. Take 10 pieces of each batch of products for physical and chemical inspection and 10 pieces for appearance inspection. Product samples shall be in accordance with the provisions of GB7321.
Chemical analysis shall be in accordance with the provisions of GB6900.1~6900.4. 5. 3
The inspection of density shall be in accordance with the provisions of GB2998.
The inspection of reburning line change shall be in accordance with the provisions of GB3997.1, and the inspection of room temperature compressive strength shall be in accordance with the provisions of GB3997.2. 5. 7
The determination of thermal conductivity shall be in accordance with the provisions of GB5990. JB/T3649.5
The inspection of appearance, size and section of products shall be in accordance with the provisions of GB10326. 5.8
Inspection rules
The inspection rules for products shall be in accordance with the provisions of Chapter 4 of GB3995 (LG to RYG). 6.2 Each batch of products (including small batches) shall be accompanied by a product qualification certificate when leaving the factory. 7 Marking, packaging, transportation and storage
7.1 Marking
Product marking shall include the following items:
Product name:
Product name and model:
Product weight:
d. Trademark,
Manufacturing date or batch number.
7.2 Packaging
In accordance with the provisions of Article 5.2 of GB3995.
7.3 Transportation
In accordance with the provisions of Article 5.3 of GB 3995.
7.4 Storage
According to Article 5.4 of GB 3995,
Additional Notes:
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. This standard was drafted by Xi'an Electric Furnace Research Institute, Shanghai Electric Furnace Refractory Material Factory, Yixing Chuanqiong Refractory Electric Porcelain Factory No. 2, and Dongtai Refractory Equipment.
The drafters of the ten key drafters of the standard are Cao Wenxiu, Zhu Su'ai, Wang Jusen, Li Xibin, and Ying Shengcai. 3
JB/T3649.5
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