3 Terms and definitions.................................................................................................................. 64 phân loại và tên gọi... 64.1 Classification.................................................................................................................................. 64.2 Designation .................................................................................................................................... 65 thông tin sẽ được cung cấp bởi người mua... 65.1 Mandatory information ................................................................................................................... 65.2 Options........................................................................................................................................... 75.3 Examples of ordering ..................................................................................................................... 76 Manufacturing process ............................................................................................................... 76.1 Steelmaking process...................................................................................................................... 76.2 Tube manufacture.......................................................................................................................... 77 Requirements ............................................................................................................................... 87.1 General .......................................................................................................................................... 87.2 hóa thành phần và tính chất cơ học... 87.3 Appearance.................................................................................................................................... 87.4 Straightness ................................................................................................................................... 87,5 bead Hàn bên ngoài và chuẩn bị kết thúc... 97,6 kích thước, khối lượng và dung sai... 98 Inspection ................................................................................................................................... 108.1 Type of inspection........................................................................................................................ 108.2 Inspection documents ..................................................................................................................108.3 Summary of inspection and testing..............................................................................................119 Sampling .....................................................................................................................................129.1 Frequency of tests........................................................................................................................129.2 Preparation of samples and test pieces.......................................................................................1210 Test methods..............................................................................................................................1310.1 Tensile test...................................................................................................................................1310.2 Flattening test...............................................................................................................................1310.3 Visual examination.......................................................................................................................1310.4 Dimensional inspection ................................................................................................................1311 Retests, sorting and reprocessing...........................................................................................1312 Marking .......................................................................................................................................1413 Coating........................................................................................................................................14Annex A (informative) Values for design of structures .......................................................................15Bibliography ............................................................................................................................................16
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