This standard specifies the classification, size, shape and weight, technical requirements, test methods, inspection rules and packaging marks of steel strips for welded steel pipes. This standard applies to steel strips used to manufacture commonly used straight seam welded steel pipes, including hot-rolled and cold-rolled steel strips with a width of less than 600mm and hot-rolled and cold-rolled steel strips with a width of 600mm or more and a width of less than 600mm after longitudinal shearing. GB/T 8164-1993 Steel strips for welded steel pipes GB/T8164-1993 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Steel strips for welded steel pipe
Steel strips for welded steel pipe1Subject content and scope of application
GB/T 816493
CB8164-87
This standard specifies the classification, size, shape and weight, technical requirements, test methods, inspection rules and packaging marks of steel strips for welded steel pipes.bZxz.net
This standard applies to steel strips used in the manufacture of commonly used straight seam welded steel pipes, including hot-rolled and cold-rolled steel strips with a width of less than 600mm and hot-rolled and cold-softened steel strips with a width of 5c0mm or more and a width of less than 600mm after longitudinal shearing. 2 Reference standards
GB222 Sampling method for chemical analysis of steel and allowable deviation of chemical composition of finished products GB223
Chemical analysis methods for steel and alloys
GB 228 Metal tensile test method
Metal bending test method
GB 247
General provisions for acceptance, packaging, marking and quality certification of steel plates and strips GB B99 ​​Technical conditions for high-quality carbon structural steel GB 700
Carbon structural steel
GB 711
GB 716
GB 912
GB 1591
Dimensions, shapes, weights and tolerances of cold-rolled steel plates and stripsDimensions, shapes, weights and tolerances of hot-rolled steel plates and stripsHigh-quality carbon structural steel hot-rolled thin steel plates and stripsHigh-quality carbon structural steel hot-rolled thick steel plates and wide steel stripsCold-rolled steel strips of carbon structural steel
Hot-rolled and cold-rolled thin steel plates and strips of carbon structural steel and low-alloy structural steelLow-alloy structural steel
GB2975
GB3274
GB3522
Sampling regulations for mechanical and process performance tests of steelsHot-rolled thick steel plates and strips of carbon structural steel and low-alloy structural steelHigh-quality carbon structural steel cold-rolled steel strips
Hot-rolled steel strips of ordinary carbon structural steel
GB3524
Cold-rolled steel strips of low-carbon steel
GB 3526
Metal tensile test specimen
GB 6397
GB8749High-quality carbon structural steel hot-rolled steel stripCB11253Carbon structural steel and low-alloy structural steel cold-rolled thin steel plate and steel stripGB13237High-quality carbon structural steel cold-rolled thin steel plate and steel stripNational Thermal Technology Supervision High1993-02-17Approved1993-10-01Implementation
3Classification and code
GB/T 8164-93
3.1 According to delivery status:
Cold rolled steel strip
3.2 According to edge status
Cutting copper strip
Uncut speed steel strip
3.3 According to manufacturing accuracy:
Ordinary accuracy
Higher accuracy
Center
4 Dimensions, shape and weight
4.1 Dimensions and allowable deviations of steel strips
4.1.1 Hot rolled steel strips
Electric power center
4.1.1.1 The allowable deviation of the thickness of steel strips with a width of less than 600mm shall comply with the provisions of Table 1. 111+4
According to the requirements of the purchaser, when supplying steel strips with thicknesses other than those in Table 1, the allowable deviation of its thickness shall be close to the provisions of the thickness deviation of small and large size steel strips in the table.
Strip width
50~600
Steel strip thickness
1. 3,2, 0.2. 2
2.5,2. 8.3. 0
3.2.3.5,3.8,4.0
4.2,4. 5,4. 8.5.0.5.5
6.0,6.5.7.0
7. 5,8. 0
Thickness tolerance
After longitudinal shearing of steel strip with width greater than or equal to 600mm, the thickness tolerance shall comply with the provisions of GB709. 4.1.1.2
4.1.1.3 The width tolerance of steel strip shall comply with the provisions of Table-2. Table 2
Steel strip width
50~200
>300--300
>300～600
4.1.2 Cold-rolled steel strip
Allowable deviation
Untrimmed
By negotiation
4.1.2.1 The allowable deviation of the thickness of steel strip with a width of less than 600mm shall comply with the provisions of Table 3. mta
2. 8~~3. 0
3. 2 ~3. 5
3. 8~-4. 0
GB/T 8164-93
Allowable deviation
Ordinary precision P
±0. 14 :
Higher precision H
After longitudinal cutting of steel strip with a width greater than or equal to 600mm, the thickness allowable deviation shall comply with the provisions of GB708. 4. 1. 2. 2
4.1.2.3 Allowable deviation of width
Cutting steel strip: width ≤250mm, ±0.5mm>250~600mm.±0.8mm.
Uncut steel strip: width 50~600mm
4.1.3 The length of the steel strip shall not be less than 50m. Short lengths of 30~50m are allowed to be delivered, but their quantity shall not exceed 5% of the total weight of a batch of delivery.
4.1.4 Steel strips with multiple widths may be supplied upon negotiation between the supplier and the buyer. The allowable deviation of multiple widths shall be in accordance with the provisions of Articles 4,1,2.3 and 4.1.1.3.
4.1.5 The thickness difference (i.e. three-point difference) of the same section of the steel strip shall not be greater than half of the thickness tolerance. 4.1.6 The inner and outer diameters of the steel strip coil shall be determined by negotiation between the supplier and the buyer. The height of the tower shall not be greater than 50mm. 4.2. The bend of the steel strip
Hot-rolled steel strip shall not be greater than 3mm per meter.
Cold-rolled steel strip shall not be greater than 2 mm per meter.
4.3 The steel strip shall be delivered according to the actual weight, and the weight of each coil shall not be greater than 2t. Upon agreement between the supplier and the buyer, the weight of each coil may also be greater than 2t. 5 Technical requirements
GB/T B164-93
5.1 The grade and chemical composition of the steel strip for welded steel pipe shall comply with the provisions of (steel grades 08, 10, 15, 20 in 3B699. Q195, Q215, Q235 in GB700 and GB159!).
5.2 The mechanical properties of the steel strip shall comply with the provisions of Table 4. Width greater than 600 mm steel strip. No performance test is required before longitudinal shearing. Surface
Carbon structural steel strip
High-quality carbon structural steel strip
Carbon structural steel hot-rolled steel strip
High-quality carbon structural steel hot-rolled steel strip
Carbon slurry structural steel cold-rolled steel strip
Low-solidification steel cold-rolled steel strip
High-quality cold-rolled steel strip
Thickness 4mm
Thickness>4~8mm
The following standards stipulate
GB 11253,GB 912
GB 710 P grade
GB3526
GB3522
GB3524
GB8749
GB3274
5.3 The cracks, scars, bubbles, inclusions and transverse scratches on the surface of the steel strip should be removed. After the defects are removed, the thickness of the steel strip shall not be less than the minimum thickness allowed.
The surface of the steel strip is allowed to have indentations and longitudinal scratches with a depth not greater than the negative deviation of the thickness allowed, as well as protrusions with a height not greater than the positive deviation of the thickness allowed. The depth and height (calculated from the actual size) are calculated on a single side. 5.4 The steel strip shall not be delaminated, and its edges shall not have broken edges and significant wave edges that affect the quality of the welded pipe. Chisel-shaped defects are allowed. Defects such as holes, cracks, burrs and jade marks, the depth or height on one side shall not be greater than the allowable deviation of the width. 5.5 The head and tail of the steel strip shall be cut evenly. With the consent of the purchaser, it is also possible to deliver without cutting the head and tail. For steel strips rolled by continuous rolling mills, the abnormal parts shall not exceed 8% of the length of the steel strip. 6 Test methods
The number of samples, sampling methods and test methods for each batch of steel strips shall comply with the provisions of Table 5. 6.1
Test items
Chemical analysis (melting composition)
Surface quality
Number of samples (pieces)
1 (per can number)
Inspection with a meat display
Taking method
GB2975
G8 2975
Test method
GB 6397
GB/T 8164—93
6.2 The specimens for tensile and cold bending tests shall be taken from the outer ring of the steel strip coil at a position more than 1m away from the end at the center of the steel strip width. If the specimen length is limited by the width of the steel strip, it is allowed to take the longitudinal specimen at the position specified above. 6.3 The thickness of the steel strip shall be measured at a distance of not less than 10mm from the edge. 6.4 When measuring the knife bend, place the inspected part of the steel strip on a flat surface, place a 1n long ruler close to the concave edge of the steel strip, and measure the maximum distance between the steel strip and the ruler.
7 Acceptance rules
7.1 The steel strip shall be inspected and accepted by the technical supervision department of the supplier. 7.2 The steel strip shall be accepted in batches, and each batch shall consist of steel strips of the same brand, the same furnace number, the same category, the same size (thickness, width), and the same heat treatment furnace (referring to heat treatment). Carbon structural steel and low alloy structural steel strips shall be batched according to the provisions of GB700 and GB1591 respectively.
7.3 The re-inspection of steel strips shall comply with the provisions of GB247. 8 Packaging, marking and quality certificates
The packaging, marking and quality certificates of steel strips shall comply with the provisions of GB247. Additional notes:
This standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information and Standards Research Institute of the Ministry of Metallurgical Industry. This standard was drafted by Anshan Iron and Steel Company and the Information and Standards Research Institute of the Ministry of Metallurgical Industry. The main drafter of this standard is Hui Fan, Huang Dong. The level mark of this standard is GB/T 8164-93I
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