QB/T 1888-2023 (QB/T 1888-1993) PDF EnglishUS$150.00 · In stock · Download in 9 seconds
QB/T 1888-1993: Spokes and nipples for bicycles Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete QB/T 1888: Historical versions
Similar standardsQB/T 1888-1993: Spokes and nipples for bicycles---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QBT1888-1993QB INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA QB/T 1888-93 Spokes and nipples for bicycles Issued on: JANUARY 06, 1994 Implemented on: AUGUST 01, 1994 Issued by. Ministry of Light Industry of PRC Table of Contents1 Subject content and scope of application... 3 2 Normative references... 3 3 Product classification... 3 4 Technical requirements... 6 5 Test method... 8 6 Inspection rules... 10 7 Marking, packaging, transportation, storage... 12 Appendix A Special tensile rod (Supplementary)... 14 Additional information... 15 Spokes and nipples for bicycles1 Subject content and scope of applicationThis standard specifies the product classification, technical requirements, test methods, inspection rules, markings, packaging, transportation, storage of spokes and nipples for bicycles (hereinafter referred to as "spokes and nipples"). This standard is applicable to the spokes and nipples of different materials for bicycles, which are specified in QB 1714 "Bike - Naming preparation methods and models".2 Normative referencesGB 238 Metallic materials-wire-reverse bend test GB 2828 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches) GB 2829 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of stability for productive process) GB 5929 Thickness testing method of the metal deposits and conversion coatings for the light industrial products - Metallographic microscopic method GB 12743 Plant quarantine rules for producing areas of soybean seeds QB/T 1217 Technical specification for bicycle electroplating QB 1714 Bike - Naming preparation methods and models3 Product classification3.1 See Table 1 and Table 2 for types and codes. measurement error due to the out-of-roundness of spoke). 5.9.1.3 Use hydrochloric acid to remove the zinc layer on the nipple (at the diameter a) (it is OK when there is no violent bubbling). 5.9.1.4 After wiping clean the corroded surface, use a micrometer to measure the diameter (b) at the same location. Calculate the thickness of the zinc layer of the spoke. Where. δ - The thickness of the zinc layer, µm; a - The diameter of spoke after plating, mm; b - The diameter of spoke after removing plating, mm. 5.9.2 Where there is a dispute, it can be arbitrated in accordance with the metallurgical microscope method in GB 5929.6 Inspection rules6.1 Products must pass the inspection of the quality inspection department of the manufacturer AND be accompanied by a certificate, before they can leave the factory. 6.2 The unit product, at the time of sampling inspection, is a pair (that is, the spoke and the nipple form a pair). 6.3 Exit-factory inspection Adopt GB 2828. 6.3.1 Adopt general inspection level I and sub-sampling plan. 6.3.2 Inspection items, unqualified classifications, acceptance quality levels are as shown in Table 11.7 Marking, packaging, transportation, storage7.1 Marking The outer packaging shall have the following signs. a. Manufacturer name; b. Product trademark; c. Product name; d. Product marking; e. Quantity; f. Gross weight and net weight; g. Date of manufacture; h. Box size (length x width x height) or volume. i. Standard code, serial number, name (it may not be marked, if it has been marked in the product manual); j. Avoid getting wet; k. Stacking height. 7.2 Packaging 7.2.1 The structure of the outer packaging box shall be firm and dry. The box shall be lined with moisture-proof paper OR take other moisture-proof measures. 7.2.2 After the products are packed in the specified inner packaging, they shall be neatly arranged in the box AND must not be shaken. 7.2.3 The product packaging shall be accompanied by a certificate of conformity. 7.3 Transportation The packaging box, which contains the product, shall be loaded, unloaded, transported, in accordance with the pictorial signs on packaging, storage, transportation. It shall be handled with care, without throwing. During transportation, it is not allowed to be exposed to the sun or rain; it is strictly forbidden to mix it with flammable products and active chemicals. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
