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GB/T 17791-2017 PDF English

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GB/T 17791-2017: Seamless copper and copper alloys tube for air conditioner and refrigeration equipment
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GB/T 17791: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 17791-2017English305 Add to Cart 0-9 seconds. Auto-delivery Seamless copper and copper alloys tube for air conditioner and refrigeration equipment Valid
GB/T 17791-2007English439 Add to Cart 3 days Seamless copper tube for air conditioner and refrigeration equipment Obsolete
GB/T 17791-1999English399 Add to Cart 3 days Specification for seamless copper tube for air conditioning and refrigeration field service Obsolete

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Similar standards

GB/T 20424   GB/T 17791   GB/T 18813   

GB/T 17791-2017: Seamless copper and copper alloys tube for air conditioner and refrigeration equipment


---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/GBT17791-2017
GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS77.150.30 H 62 Replacing GB/T 17791-2007 Seamless copper and copper alloys tube for air conditioner and refrigeration equipment Issued on. JULY 12, 2017 Implemented on. FEBRUARY 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC.

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Requirements... 5 4 Test method... 10 5 Inspection rules... 11 6 Marking, packaging, transportation, storage and quality certificate... 14 7 The content of the purchase order (or contract)... 15 Appendix A (Normative) Method for determination of residue (total) on the inner surface of copper tube... 17 Appendix B (Informative) Determination method of oil content on inner surface of copper tube... 20 Appendix C (Informative) Method for determination of inner surface moisture of copper tube... 22 Appendix D (Informative) Determination method of chloride ion (Cl-) on the inner surface of copper tube... 24 Appendix E (Informative) Analysis method of paraffin wax on inner surface of copper tube... 26

1 Scope

This standard specifies the requirements, test methods, inspection rules, packaging, marking, transportation, storage, quality certificates and purchase orders (or contracts) of seamless copper and copper alloys tube for air conditioner and refrigeration equipment. This standard applies to seamless copper and copper alloys tube (hereinafter referred to as tubes) for household air conditioners, refrigerators (freezers), small and medium-sized central air conditioners, refrigeration equipment.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard. GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1.Method of test at room temperature GB/T 242 Metal materials - Tube - Drift-expending test GB/T 246 Metal materials - Tube - Flattening test GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1. Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection GB/T 5121 (all parts) Copper and copper alloy - Chemical analysis methods GB/T 5231 Designation and chemical composition of wrought copper and copper alloys

3 Requirements

3.1 Product classification 3.1.1 Designation, status and specification The designation, status and specifications of the tubes shall meet the requirements of Table 1.The dimensions of the inner and outer diameters of the tube coils shall meet the requirements of Table 2. 3.1.2 Marking example The product marking is expressed in the order of product name, standard number, designation (or code), status and specification. 3.3 Dimensions and allowable deviation 3.3.1 The external dimensions of the tube and its allowable deviation shall meet the requirements of Table 3 and Table 4. 3.9 Cleanliness 3.9.1 The internal surface residues (total amount) of soft annealing (O60) and light annealing (O50) tubes shall meet the requirements of Table 11. 3.9.2 Residues on the inner surface of copper tubes for refrigerators shall meet the requirements of Table 12. 3.10 Surface quality The inner and outer surfaces of the tube shall be clean and bright; there shall be no harmful defects that affect the use.

4 Test method

4.1 Chemical composition The analysis of the chemical composition of the tube shall be carried out in accordance with the provisions of GB/T 5121 (all parts) or YS/T482.The arbitration shall be carried out in accordance with the provisions of GB/T 5121 (all parts). 4.4 Flaring test The flaring test of the tube is carried out in accordance with the provisions of GB/T 242. 4.5 Flattening test The flattening test of the tube is carried out according to the requirements of GB/T 246. 4.6 Eddy current flaw testing The eddy current flaw testing of the tube shall be carried out in accordance with the provisions of GB/T 5248. 4.7 Grain size The grain size inspection of the tube shall be carried out according to the requirements of YS/T 347. 4.8 Hydrogen embrittlement test The hydrogen embrittlement test of the tube is carried out according to the closed bending method in GB/T 23606.The repeated bending method in GB/T 23606 is used for arbitration; the number of bending is at least 6 times. 4.9 Cleanliness The inspection of internal surface residues (total) of tubes with an outer diameter of ≤ 30 mm shall be carried out in accordance with Appendix A. 4.10 Surface quality Visually inspect the surface quality of the tube.

5 Inspection rules

5.1 Inspection and acceptance 5.1.1 The product shall be inspected by the supplier, to ensure that the product quality meets the requirements of this standard and the purchase order (or contract). Meanwhile it shall fill in the quality certificate. 5.2 Group-batching The tubes shall be submitted for acceptance in batches; each batch shall be composed of the same designation, state, specification and processing method; the weight of each batch shall not exceed 10000 kg. 5.3 Inspection items The tube shall be inspected for chemical composition, external dimensions and allowable deviations, mechanical properties, flaring test, eddy current flaw detection, grain size, cleanliness residue (total), oil content, moisture and surface quality whilst it is exit-factory. 5.4 Sampling Sampling shall meet the requirements of Table 13.The sampling method is carried out in accordance with the provisions of YS/T 668.

6 Marking, packaging, transportation, storage and quality certificate

6.1 Marking 6.1.1 Product marking The following marks shall be marked on the qualified tubes. 6.1.2 Packaging box marking The packaging box mark of the tube shall comply with the requirements of GB/T 8888. 6.2 Packaging 6.2.1 The packaging of tubes shall meet the requirements of GB/T 8888.The coil shall be sealed after being filled with protective gas. 6.3 Transport, storage and quality certificate The transport, storage and quality certificate of the tube shall meet the requirements of GB/T 8888.

7 The content of the purchase order (or contract)

The purchase order (or contract) of the materials listed in this standard shall include the following. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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