This standard specifies the classification and marking, requirements, test methods, inspection rules and markings, packaging, transportation, and storage of pulleys for building doors and windows hardware components. This standard is applicable to pulleys for sliding doors and windows in buildings, and lifting wheels for sliding doors. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 2828.1 Sampling Inspection Procedures by Attributes, Part 1: Batch by Batch Inspection Sampling Plan Retrieved by Acceptance Quality Limit (AQL) GB/T 5823 Terminology for Building Doors and Windows GB/T14436 General Principles for Industrial Product Assurance Documents GB/T32223 General Requirements for Building Doors and Windows Hardware 3 Terminology and Definitions GB/T 5823 and the following terms and definitions apply to this document. 3.1 The roller is a device that bears the mass of the door and window sash and can cause the door and window sash to move back and forth along the track through rolling under the action of external forces. [GB/T 32223-2015, Definition 3.12] 3.2 Pulley for hanging roller suspension installation. 3.3 Bearing capacity The allowable design value of the maximum weight that the pulley can withstand
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China