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GB/T 2694-2010 English PDF (GBT2694-2010)

GB/T 2694-2010 English PDF (GBT2694-2010)

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GB/T 2694-2010: Specification of manufacturing for transmission line tower

This Standard specifies the requirements such as materials, technical requirements, inspection, packing, marking, transportation and storage during the manufacture process of transmission line towers.
GB/T 2694-2010
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 29.240.99
K 47
Replacing GB/T 2694-2003
Specification of Manufacturing for
Transmission Line Tower
ISSUED ON. DECEMBER 23, 2010
IMPLEMENTED ON. MAY 1, 2011
Issued by. General Administration of Quality Supervision,
Inspection and Quarantine (AQSIQ);
Standardization Administration of China (SAC) of the
People's Republic of China.
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative References ... 5
3 Terms, Definitions and Symbols ... 7
3.1 Terms and Definitions ... 7
3.2 Symbols ... 8
4 General Provisions ... 9
5 Materials ... 9
5.1 Steel ... 9
5.2 Welding Materials ... 10
5.3 Fasteners ... 10
5.4 Zinc Ingots ... 11
6 Technical Requirements ... 11
6.1 Shearing ... 11
6.2 Marking ... 11
6.3 Bending ... 12
6.4 Holing ... 13
6.5 Arc Shoveled, Chip Heel and Beveling ... 14
6.6 Welding ... 15
6.7 Assembling of Weldment ... 21
6.8 Straightening ... 23
6.9 Hot-dip Galvanizing ... 24
6.10 Test Assembling ... 25
7 Inspection ... 26
7.1 Conformity Certificate ... 26
7.2 Inspection Items ... 26
7.3 Inspection Requirements and Methods ... 27
7.4 Sampling Scheme and Judgement Principles ... 28
8 Packing, Marking, Transportation and Storage ... 32
8.1 General Requirements for Packing ... 32
8.2 Marking ... 33
8.3 Transportation and Storage ... 33
Appendix A (Normative) Uniformity Test of Hot-dip Galvanized Coating ?€? ... 34 Method of Copper Sulfate Test ... 34
Appendix B (Normative) Adhesiveness Test of Hot-dip Galvanized Coating ?€? ... 36 Method of Drop-Hammer Test ... 36
Appendix C (Normative) Thickness Test of Hot-dip Galvanized Coating ?€? ... 37 Test Method by Metal Coating Thickness Tester ... 37
Appendix D (Normative) Adhesion Amount Test of Hot-dip Galvanized Coating ?€? ... 38 Dissolving and Weighing Test Method ... 38
Appendix E (Normative) Adhesion Amount and Uniformity Test of Hot-dip Galvanized Coating - Sampling Method ... 40
Appendix F (Informative) Color and Corresponding Temperature of Steel Surface ... 41 Foreword
This Standard was drafted according to the rules specified in GB/T 1.1-2009. This Standard replaces GB/T 2694-2003 "Transmission Line Tower - Technical Requirements for Manufacturing".
Compared with GB/T 2694-2003, besides the editorial amendments, the main technical changes of this Standard are as follows.
- The characteristics of the ultra-high voltage (UHV) steel-tower products were fully considered;
- The chapter "Terms, Definitions and Symbols" was added;
- Requirements for materials were added;
- Parts of the items and tolerances were adjusted, added-deleted;
- Index requirements of test assembling were added;
- Inspection requirements were modified.
This Standard was proposed by and shall be under the jurisdiction of China Electricity Council.
Drafting organizations of this Standard. Power Industry Electric Power Installation and Line Material Quality Inspection Test Center, Weifang Chang'an Steel-tower Stock Co., Ltd., Anhui Hong Yuan Iron Tower Co., Ltd., Changshu Fengfan Power Equipment Co., Ltd., Fujian Electric Power Survey and Design Institute, Zhejiang Shengda Steel-tower Co., Ltd., Nanjing Daji Steel-tower Manufacturing Co., Ltd., Yunnan Electric Power Line Equipment Factory, Guangdong Electric Line Appliance Factory AND Chongqing Jiangjin Electric Power Line Component Factory.
Chief drafting staffs of this Standard. Li Xianjin, Cai Pengyi, Wang Jun, Zhu Danming, Zhao Jinyuan, Zhang Guixiang, Su Bo, Zhu Wende, Ma Qian, Zhao Jinfei, Chang Juan and Ren Jindong.
The previous editions replaced by this Standard are as follows.
- GB 2694-1981, GB/T 2694-2003.
Specification of Manufacturing for
Transmission Line Tower
1 Scope
This Standard specifies the requirements such 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. 2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment) applies.
GB/T 41 Hexagon Nuts - Product Grade C (GB/T 41-2000, eqv ISO 4034.
1999)
GB/T 95 Plain Washers - Product Grade C (GB/T 95-2002, eqv ISO 7091. 2000) GB/T 470 Zinc Ingots (GB/T 470-2008, ISO 752. 2004, MOD)
GB/T 699 Quality Carbon Structural Steels
GB/T 700 Carbon Structural Steels (GB/T 700-2006, ISO 630. 1995, NEQ)
GB/T 702 Hot-rolled Steel Bars - Dimensions, Shape, Weight and Tolerances (GB/T 702-2008, ISO 1035-1~4. 1980, MOD)
GB/T 706 Hot Rolled Section Steel
GB/T 709 Dimension, Shape, Weight and Tolerances for Hot-rolled Steel
Plates and Sheets (GB/T 709-2006, ISO 7452. 2002, ISO 16160. 2000, NEQ) GB/T 805 Tight Nuts
GB/T 985.1 Recommended Joint Preparation for Gas Welding, Manual Metal
Arc Welding, Gas-shield Arc Welding and Beam Welding (GB/T 985.1-2008, ISO 9692-1. 2003, MOD)
GB/T 985.2 Recommended Joint Preparation for Submerged Arc Welding (GB/T 985.2-2008, ISO 9692-2. 1998, MOD)
GB/T 1591 High Strength Low Alloy Structural Steels
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 2828.1-2003, ISO 2859-1. 1999, IDT)
GB/T 2829 Sampling Procedures and Tables for Periodic Inspection by
Attributes (Apply to Inspection of Process Stability)
GB/T 3098.1 Mechanical Properties of Fasteners-Bolts, Screws and Studs
(GB/T 3098.1-2000, idt ISO 898-1. 1999)
GB/T 3098.2 Mechanical Properties of Fasteners-Nuts-Coarse Thread (GB/T 3098.2-2000, idt ISO 898-2. 1992)
GB/T 3323 Radiographic Examination of Fusion Welded Joints in Metallic
Materials
...

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