目录简介 | Contents Foreword 1 Scope 2 Normative references 3 Symbols 4 Dimensions, appearance and mass 4.1 Outer diameter and wall thickness 4.2 Length 4.3 Ovality 4.4 Straightness 4.5 Pipe end 4.6 Mass 5 Technical requirements 5.1 Manufacturing Methods 5.2 Grade of steel 5.3 Chemical composition 5.4 Mechanical properties 5.5 Hydraulic tests 5.6 Nondestructive inspection 5.7 Appearance quality 5.8 Other surface defects and imperfections 5.9 Disposal of imperfections and defects 5.10 Grinding and repair requirements 6 Inspection and testing methods 6.1 Chemical composition 6.2 Tensile test 6.3 Hydraulic test 6.4 Nondestructive inspection 7 Inspection rules 7.1 Surface and dimensional inspection 7.2 chemical composition of base metal 7.3 Tensile testing of the welded joints 7.4 Nondestructive inspection 8 Coat, marking, and quality certificate 8.1 Coat 8.2 Marking 8.3 Quality certificate Appendix A (Informative Appendix) X-ray inspection |