This standard specifies such requirements as materials, technical requirements, inspection, packing, marking, transportation and storage during the manufacture process of transmission line towers (hereinafter referred to as "steel tower").
This standard is applicable to the manufacturing of transmission line towers, electric power microwave towers, electric power communication towers and similar steel structures, of which the elements are manufactured mainly with angle steel, connected by fasteners and resistant to corrosion by hot-dip galvanizing.
Foreword III
1 Scope 1
2 Normative References 1
3 Terms, Definitions and Symbols 2
3.1 Terms and Definitions 2
3.2 Symbols 3
4 General Provisions 4
5 Materials 4
5.1 Steel 4
5.2 Welding Materials 4
5.3 Fasteners 5
5.4 Zinc Ingots 5
6 Technical Requirements 5
6.1 Shearing 5
6.2 Labeling 6
6.3 Bending 6
6.4 Holing 7
6.5 Arc Shoveled, Chip Heel and Beveling 9
6.6 Welding 9
6.7 Assembling of Weldment 15
6.8 Straightening 16
6.9 Hot-dip Galvanizing 17
6.10 Test Assembling 18
7 Inspection 19
7.1 Conformity Certificate 19
7.2 Inspection Items 19
7.3 Inspection Requirements and Methods 20
7.4 Sampling Plan and Judgement Principles 21
8 Packing, Marking, Transportation and Storage 24
8.1 General Requirements for Packing 24
8.2 Marking 24
8.3 Transportation and Storage 25
Appendix A (Normative) Uniformity Test of Hot-dip Galvanized Coating - Method of Copper Sulfate Test 26
Appendix B (Normative) Adhesiveness Test of Hot-dip Galvanized Coating - Method of Drop Hammer Test 28
Appendix C (Normative) Thickness Test of Hot-dip Galvanized Coating - Test Method by Metal Coating Thickness Tester 29
Appendix D (Normative) Adhesion Amount Test of Hot-dip Galvanized Coating - Dissolving and Weighing Test Method 30
Appendix E (Normative) Adhesion Amount and Uniformity Test of Hot-dip Galvanized Coating - Sampling Method 32
Appendix F (Informative) Color and Corresponding Temperature of Steel Surface 33
