GB/T 35979-2018 English PDF

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GB/T 35979-2018: Technical specification for selection, installation, use and maintenance of metal bellows expansion joints
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 35979-2018	439	Add to Cart	4 days	Technical specification for selection, installation, use and maintenance of metal bellows expansion joints	Valid

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Basic data

Standard ID: GB/T 35979-2018 (GB/T35979-2018)
Description (Translated English): Technical specification for selection, installation, use and maintenance of metal bellows expansion joints
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J15
Classification of International Standard: 77.140.75
Word Count Estimation: 22,216
Date of Issue: 2018-02-06
Date of Implementation: 2018-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 35979-2018: Technical specification for selection, installation, use and maintenance of metal bellows expansion joints

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical specification for selection, installation, use and maintenance of metal bellows expansion joints ICS 77.140.75 J15 National Standards of People's Republic of China Metal bellows expansion joint selection, installation, Use maintenance specifications Published on.2018-02-06 2018-09-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration released Directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Typical application of expansion joints 3 4.1 Selection Principles 3 4.2 Application of Axial Displacement 3 4.3 Application of Transverse Displacement and Combined Displacement 6 5 Typical improper application of expansion joints 12 6 Transportation and Storage 14 7 Installation and Use Maintenance 14 7.1 Installation 14 7.2 Check before system pressure test after installation 7.3 Inspection During System Pressure Test and Pressure Test Completed 15 7.4 Precautions for Installation, Cleaning, Pressure Testing, etc. 15 7.5 Periodic Inspection During Use 16 8 Pipeline systems with expansion joints to be modified or changed 16 9 Confirmation 17 Appendix A (Normative) Expansion Joint Graphic Symbol Name 18 Appendix B (Normative Appendix) Positional Interval of Unrestricted Axial Expansion Joint Guide Brackets 19

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Pipeline Annex Standardization Technical Committee (SAC/TC237). This standard was drafted by. Aerospace Chenguang Co., Ltd., Nanjing Chenguang Donglu Bellows Co., Ltd., Shijiazhuang Juli Technology Co., Ltd. Division, Qinhuangdao Ted Pipe Industry Technology Co., Ltd., Qinhuangdao North Pipe Industry Co., Ltd., Shanghai Yongxin Bellows Co., Ltd., National Instruments Table Component Quality Supervision and Inspection Center, Jiangsu Province Special Equipment Safety Supervision and Inspection Institute, Ningbo Xingjian Bellows Co., Ltd., Zhongji Production Promotion Center. The main drafters of this standard. Wang Zhaojuan, Cheng Yong, Liu Yong, Chen Lisu, Song Hongwei, Chen Guangbin, Qian Yu, Wu Jianfu, Yu Zhenyi, Wang Yining, Ma Liwei, Shen Guanqun, and Feng Feng. Metal bellows expansion joint selection, installation, Use maintenance specifications

1 Scope

This standard specifies the typical application of metal bellows expansion joints, transportation, storage, installation, use and maintenance, installation of metal bellows expansion Section of the pipeline system to modify or change matters and confirmations. This standard applies to all kinds of piping systems installed with metal bellows expansion joints (hereinafter referred to as expansion joints).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 35990-2018 Metal bellows expansion joints for pressure piping

3 Terms and definitions

The terms and definitions defined in GB/T 35990-2018 and the following apply to this document. 3.1 Installation instalation The process of assembling an expansion joint to a designated location on a piping system in accordance with the requirements of the engineering design and in accordance with the installation instructions, including the system All on-site inspections and tests required by the specification. 3.2 Axial displacement axialdisplacement The dimension along the axis of the expansion joint. Note. The shortened dimension is called axial compression displacement, and the extension dimension is called axial tension displacement. 3.3 Lateral displacement lateraldeflection The relative displacement of the ends of the expansion joint in the direction perpendicular to its axis. 3.4 Angular displacement angulardisplacement The two ends of the expansion joint rotate relative to each other, so that the axis of the expansion joint changes from the initial straight line to the arc line, and the variation angle of the included angle between the two ends of the expansion joint. 3.5 Rated displacement ratedmovement The maximum amount of displacement that the expansion joint can absorb (axial tension displacement, axial compression displacement, lateral displacement, angular displacement, or any resultant displacement). Note. This value varies with different sizes, waveforms, and types of expansion joints, as specified by the manufacturer. 3.6 Unconstrained expansion joints unrestrainedexpansionjoint The expansion joint that cannot withstand the pressure thrust itself. 3.7 Constrained expansion joints restrainedexpansionjoint An expansion joint that can withstand pressure thrust (with levers, hinges, or other force members) on its own. ......

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