This standard specifies the terms and definitions, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, and quality commitment of electric tube type three-phase industrial heaters (hereinafter referred to as heaters). This standard applies to three-phase appliances with a rated voltage not exceeding 480V, using electric heating tubes as heating elements and forced convection heat transfer through fans. Electric heaters used in industrial, agricultural, and similar places can be portable, fixed, and standing appliances. This standard does not apply to heaters intended for use in special environments that frequently produce corrosive or explosive gases such as dust, steam, or gas. 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 1019-2008 General Principles for Packaging of Household and Similar Electrical Appliances GB/T 2421-1999 Environmental Testing of Electrical and Electronic Products Part 1: General (IEC 6008-1:1988, IDT) GB/T 2423.17 Environmental Testing of Electrical and Electronic Products Part 2: Test Methods Test Ka: Salt Spray Test Method (IEC60068-2-11: 1981, EQV, GB/T 2423.17-2008) GB/T 2828.1 Sampling and Inspection Procedures by Attributes Part 1: Sampling Plan for Batch Inspection Retrieved by Acceptance Quality Limit (AQL) (ISO2859-1: 1999, IDT, GB/T 2828.1-2012) GB/T 2829 Sampling Procedures and Tables for Periodic Inspection (Applicable to the Inspection of Process Stability) GB/T 4208 Degrees of Protection Provided by Enclosures (IP Code) (IEC 60529:2001, IDT, GB/T 4208-2017) GB/T 5959.1-2019 Safety of Electric and Magnetic Processing Devices - Part 1: General Requirements (IEC 60519-1:2015, IDT) GB 5959.4 Safety of Electric Heating Devices - Part 4: Special Requirements for Resistance Heating Devices (IEC 60519-2:2006, IDT, GB5959.4-2008) GB 4706.1-2005 Safety of household and similar electrical appliances - Part 1: General requirements (IEC 60335-1:2004 (Ed4.1), IDT) GB/T 9286 Cross cut Test for Paints and Varnishes Film (ISO 2409:1992, MOD, GB/T 9286-1998) GB/T 16842 Test Fixtures for Testing the Protection of Enclosures against Persons and Equipment (IEC 61032:1997, IDT, GB/T 16842-2016) GB/T 16895.2-2017 Low Voltage Electrical Installations - Part 4-42: Safety Protection and Thermal Effect Protection - QB/T 4096-2010 Performance of Indoor Heaters for Household and Similar Purposes - Part 1: General Requirements - QB/T 4096.22 Performance of Indoor Heaters for Household and Similar Purposes - Part 22: Special Requirements for Fan Heaters - ISO 18219:2015 Leather - Determination of Chlorination in Leather - Short Chain Chlorinated Paraffin (SCCP) - Chromatographic Method [Leather Determination of chlorinated hydrarbons in leather Chromatographic method for short chain chlorinated paraffins (sCCP)]
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