Scope
This standard specifies the terms and definitions, classification, main technical parameters and models, technical requirements, test methods, inspection rules and markings, packaging, transportation, and storage of tubular electric heating elements (hereinafter referred to as "elements") for daily use This standard applies to components installed in household appliances with a rated voltage not exceeding 480V and a single tube rated power not exceeding 6000 W. This standard does not apply to:
- components specifically designed for industrial use
- Components operating in vacuum or absolute pressure exceeding 1 MPa
- Components that operate in flammable and explosive environments The following documents 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 1804-2000 General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications
GB 4706.1-2005 Safety of Household and Similar Electrical Appliances - Part 1: General Requirements
GB 4706.12-2006 Safety of Household and Similar Electrical Appliances - Specific Requirements for Storage Water Heaters
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