This standard specifies the requirements, test methods, inspection rules, marking, packing, transport and storage of seamless copper alloy tubes for heat exchangers and condensers.
This standard is applicable to the seamless copper alloy round tubings for manufacturing heat exchangers and condensers in such industry sectors as thermal power generation, naval vessels and ships, offshore oil, machinery and chemical industry.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending error in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB/T 228—2002 Metallic Materials-Tensile Testing at Ambient Temperature
GB/T 241 Metal Materials—Tube—Hydrostatic Pressure Test
GB/T 242 Metallic Materials—Tube—Drift Expanding Test
GB/T 246 Metallic 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 Methods for Chemical Analysis of Copper and Copper Alloys
GB/T 5231 Wrought Copper and Copper Alloys Chemical Composition Limits and Forms of Wrought Products
GB/T 5248 Copper and Copper Alloy—Seamless Tubes—Eddy Current Testing Method
GB/T 8888 Wrought Heavy Non-ferrous Metal Products—Packing, Marking, Transporting and Storing
GB/T 10567.1 Wrought Copper and Copper Alloys—Detection of Residual Stress—Mercury Nitrate Test
GB/T 10567.2 Wrought Copper and Copper Alloys—Detection of Residual Stress—Ammonia Test
YS/T 347 Copper and Copper Alloys—Estimation of Average Grain Size
3 Requirements
3.1 Product classification
3.1.1 Designation, state and specification
The designation, state and specification of tubing shall be in accordance with those specified in Table 1.
