T/CHEAA 0032-2024 Copper tube technical requirements for all-closed-type motor-compressor used in refrigerator

Scope

Scope: This document specifies the requirements for the appearance, cleanliness, physical properties of materials, dimensions, and packaging of copper tubes used in fully enclosed electric motors-compressors (hereinafter referred to as compressors) for refrigerators, covering five aspects in total. This document applies to copper tubes used in the suction pipe, process pipe, and discharge pipe of compressors. Compressors with similar applications may refer to this document for implementation. Main technical contents: 4.1 Appearance: The inner and outer surfaces of the copper tubes shall be smooth, clean, and non-discolored. There shall be no pinholes, cracks, scratches, peeling, bubbles, rough drawing marks, inclusions, green rust, water, or other harmful defects. The copper tubes shall not be twisted or deformed. 4.2 Cleanliness: The surface of the copper tubes shall not contain substances such as silicon that may affect the quality of brazing or ring connection. 4.3 Material physical properties: 4.3.1 Composition: a) The copper tubes shall be seamless phosphorus-deoxidized copper tubes, and their composition shall meet the requirements of the TP2 grade in Table 1 of GB/T 5231-2022; b) The mechanical properties shall meet the requirements of the TP2 grade in State O60 in Table 3 of GB/T 1527-2017. 4.3.2 Grain size: The grain size shall meet the requirements of the TP2 grade in Table 5 of GB/T 2059-2017. 4.4 Dimensions: According to the actual needs of the refrigerator, the inner and outer diameters and limiting lengths of the suction pipes, discharge pipes, and process pipes shall be divided into several categories. 4.5 Packaging: a) The packaging shall be moisture-proof and pollution-free. b) Each package shall be marked with a sticker or fixed label indicating the specifications and quantity of the copper tubes, etc.

Development Information

Related Standards