JB/T 2833-1992 Ventilation channel steel

JB/T 2833-1992 Ventilation Channel Steel JB/T2833-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T2833
1992-12-21
Zhang Xianji
1992-10-01Xiaohuang
Jijiakuiluwayixian
1 Subject content and scope of application
JB/T28331992
JB2833-80
This standard specifies the model specifications, technical requirements, inspection rules and test methods, as well as packaging, marking and transportation requirements of ventilation channel steel. This standard is applicable to the ventilation channel steel used in the manufacture of motors. 2 Reference standards
GB131 Mechanical drawing surface roughness code and its annotation method YB170 Ordinary carbon steel and low alloy structural steel hot rolled bar steel technical strip production 3 Variety specifications
3.1 The cross-sectional shape, specification, size and deviation of ventilation channel steel shall comply with the provisions of Figure 1 and Table 1. 3.2 Ventilation slots should be supplied in strips.
3.3 The supply length of ventilation slot steel is stipulated as follows: a. The usual length is 2~~4m, and the allowable supply length is not less than 1.5tn: the old length shall not exceed 15% of the batch delivery quantity; the fixed length and multiple length shall be indicated in the contract: the length deviation is 132mm. b. bzxz.net
3.4 ​​When ordering, the product name, specification, material and the number of this standard shall be indicated. Marking example: The ventilation channel steel with a width of 8mm and a height of 10rtu made of Class A ordinary carbon structural steel A3 is marked as ventilation channel steel 8×13-A3-JB/T 2837-92 Figure
1992-12-21 Nodule
1992-10-01 Small cable
4 Technical requirements
JB/T2833
Dimensions and deviations
1. 5 +y.3
Section coefficient
20. 015 3
eQ:031 4
2=0. 047 7
Theoretical sub-quantity
4.1 The ventilation channel steel is made of A3 grade A carbon structural steel. The chemical composition, mechanical properties and technical conditions shall comply with the provisions of YB170.
Quality: Ventilation channel steel made of other materials can be supplied upon agreement between the two parties: 4.2 The linear length of each meter of the ventilation channel steel delivered in strips shall not exceed 4mm. 4.3 The ventilation channel steel shall not have visible twisting with the naked eye. 4.4 The vertical section of the ventilation steel shall not have obvious asymmetry with the naked eye: 4.5 The ventilation channel steel shall not have visible cracks when punching. 4.6 The surface of the ventilation channel steel shall be clean and smooth, without cracks, scars, inclusions, folds and oxide scale, etc., but local mechanical scratches, black spots, dots and small burrs are allowed, and their depth shall not exceed half of the deviation. 5 Inspection rules and test methods
5.1 Each batch of ventilation steel shall be inspected by the quality management department of the manufacturer. 5-2 Ventilation channel steel shall be inspected in batches, and each batch shall be made of the same material and the same specification. 5.3 Take 10% of each batch of ventilation channel steel and inspect the surface quality with the naked eye: measure the cross-sectional dimensions with a measuring tool with an accuracy of 0.02mm. 5.4 Randomly select 5 pieces from each batch of ventilation channel steel, and take a 500mm long sample from each piece, and perform a punching rivet foot test according to Figure 2. 5.5 Use a 1m long ruler to check the straightness of each meter. 5.6 If any item of the inspection result is unqualified, it cannot be shipped out of the factory, and it is allowed to be reprocessed. Submit it as a new batch for inspection. If it is unqualified again, it can be inspected item by item. The qualified ones will be delivered.
6 Packaging, marking and transportation
6.1 Ventilation channel steel shall be delivered in bundles, and each bundle shall be made of the same material and the same specification: the weight shall not exceed 30kg. 6.2 Ventilation channel steel should be coated with anti-rust oil before leaving the factory. The packaging is divided into two layers, the inner layer is wax paper, and the outer layer is sack skin. The two ends should be thickened and tightly wrapped without loosening. Each bundle of wire waist should not be less than three. 6.3 Ventilation channel steel should be transported under conditions that will not cause damage and corrosion. 6.4 Each bundle of ventilation channel steel should be hung with a sign. The sign should be clear and reliable. It should be tightly wrapped with wire on the outside of the packaging skin. The sign should indicate:
Manufacturer name;
Product name:
Type and specification:
Material:
Production date
Standard number.
JB/T2833
6.5 Each batch of ventilation channel steel should be accompanied by a quality certificate, which should indicate: manufacturer name, contract number, material, product type and specification, weight, various technical conditions inspection results, quality management department's stamp and standard number. Additional Notes: This standard was proposed by Harbin Large Electric Machinery Research Institute and drafted by Shanghai Electric. The main drafter of this standard is Huang Jurong: Jijiaxinkuilu JB/T2833 Hang880b1230 19XXXXling 100044 Wanduan X/X XXX, XXX 19XX Nest XX Cabin XXtt|| German pxXX.XX Wing Xianji Pomfret
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