This standard specifies the product classification, technical requirements, inspection rules and marking, packaging, transportation and storage of H65 brass strip for welded pipes. This standard applies to H65 brass strip for welded pipes. GB/T 15714-1995 H65 brass strip for welded pipes GB/T15714-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Brass (H65) strip for welded tube
Brass (H65) strip for welded tubeSubject content and scope of application
GB/T 15714 --- 1995
This standard specifies the product classification, technical requirements, inspection rules and marking, packaging, transportation and storage of H65 brass strip for welded tube. This standard applies to H65 brass strip for welded tube. 2 Reference standards
GB4156Metal cupping test method (thickness 0.22mm)GB5122.1~~5122.20Chemical analysis method for brassGB5232Chemical composition and product shape of processed brassGB8888Packaging, marking, transportation and storage of heavy non-ferrous metal processing products3 Product classification
3.1Grade, state, specification
The brand, state and specification of the product shall comply with the provisions of Table 1. Table 1
3.2 Marking example
3/4 hard (Y1)
1/4 hard (Y4)
0.21~0.30
200~305
Strip made of H65, 1/4 hard, higher grade, 0.26mm thick, 305mm wide, marked as: Strip H65Y4 Higher grade 0.26X305GB15714--19954 Technical requirements
4.1 Chemical composition
The chemical composition of the strip shall comply with the provisions of GB5232. 4.2 Dimensions and allowable deviations
4.2.1 The allowable deviations of the thickness and width of the strip shall comply with the provisions of Table 2. Table 2
Thickness tolerance
Ordinary grade
Higher grade
Note: When the purchaser only requires positive or negative deviation, the value is twice the value in the table. Approved by the State Bureau of Technical Supervision on October 17, 1995
Implementation on March 1, 1996
GB/T15714 - 1995
4.2, 2 Strips with other specifications and tolerances can be supplied upon agreement between the supplier and the purchaser. 4.2.3 The thickness tolerance accuracy must be indicated in the contract, otherwise it shall be supplied as ordinary grade. 4.2.4 Both sides of the strip shall be cut flush, without burrs, cracks and curling. 4.2.5 The shape of the strip shall be straight, but slight waves are allowed, and the curvature of the side shall not exceed 3mm per meter. 4.2.6 The standard inner diameter of the strip coil is 4150, 0200, $250, $300, 400, and $500. 4.2.7 Each coil shall consist of strips. The ends of the strip coil shall be rolled neatly. 4.3 Process performance
The cupping test results of the strip shall comply with the provisions of Table 3. Table 3
4.4 Surface quality
Cupping value
5. 5 ~~ 7.5
8. 0~10, 5
Punch radius
4.4.1 The surface of the strip shall be smooth and clean, and cracks, peeling, bubbles, inclusions, thorns, severe dezincification, folding, green rust, and delamination are not allowed. 4.4.2 Slight, localized scratches, spots, pits, indentations, press-ins, and roller marks are allowed, which do not make the strip thickness exceed its allowable deviation.
4.4.3 Slight redness, darkening, oxidation color and slight, local oil and water marks are not used as a basis for scrapping. 5 Test methods
5.1 Chemical composition arbitration analysis shall be carried out in accordance with the provisions of GB5122. 5.2 Process performance inspection methodwwW.bzxz.Net
The cupping test method of strips shall be carried out in accordance with the provisions of GB4156. 5.3 Dimension measurement method
The outer dimensions of the strips shall be measured with measuring tools of corresponding accuracy. The thickness shall be measured at a distance of not less than 100mm from the end and not less than 5mm from the edge. The thickness exceeding the tolerance outside the measurement range shall not be used as a basis for scrapping. 5.4 The surface quality of the strips shall be inspected visually. 6 Inspection rules
6.1 Inspection and acceptance
6.1.1 The strips shall be inspected by the supplier's technical supervision department to ensure that the product quality meets the requirements of this standard and fill in the quality certificate. 6.1.2 The purchaser shall inspect the products received in accordance with the provisions of this standard. If the inspection results do not conform to the provisions of this standard, the purchaser shall submit the matter to the supplier within three months from the date of receipt of the product, and the two parties shall negotiate to resolve the issue. 6.2 Batches
Strips shall be submitted for inspection in batches. Each batch of products shall consist of the same brand, furnace number, state and specification. The weight of a single roll shall be agreed upon by the supply and demand parties. 6.3 Inspection items
Each batch of strips shall be inspected for chemical composition, dimensional deviation, process performance and surface quality. 6.4 Sampling location and number of samples
6.4.1 During the melting and casting process, the supplier shall take one sample from each furnace for chemical composition inspection. 6.4.2 The purchaser shall randomly take one sample from each batch of strips for chemical composition inspection. 6.4.3 For the cupping test of strips, two rolls shall be randomly taken from each batch, and one sample shall be taken from each roll. 6.4.4 Each roll of strip should be subjected to external dimension measurement and surface quality inspection: 2
6.5 Repeated test
GB/T15714--1995
If one test result of each test sample fails, double test samples should be taken from the batch to retest the failed item. If one test sample still fails after the retest, the whole batch shall be scrapped or tested roll by roll, and the qualified ones shall be accepted in a separate batch. Packaging, marking, transportation, storage and quality certification Packaging, marking, transportation, storage and quality certification shall be carried out in accordance with the provisions of GB8888. Additional remarks:
This standard was proposed by China Nonferrous Metals Industry Corporation. This standard was drafted by Shanghai Nonferrous Metals Corporation Copper Strip Company. The main drafters of this standard are Tang Shuxiu, Yin Baozhong, Niu Zhenliang and Hong Hengmin. 129
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