NB/T 11127-2023Technical specification for scrap detection of the steel cord conveyor belt in service (English PDF)
在用钢丝绳芯输送带报废检测技术规范
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Issued by
NEA
Level / Type
Industry · Recommended
Issue date
February 6, 2023
Implementation date
August 6, 2023
Scope
NB/T 11127-2023 is the English-translated version of 在用钢丝绳芯输送带报废检测技术规范.
NB/T 11127-2023 is the Chinese energy industry specification for deciding when a steel cord conveyor belt in service has reached the point of scrapping.
It defines scrapping, broken cords and the damaged surface area, and lists the items to check: operating life and appearance quality, including damaged belt surface area, cover thickness, depth of surface cracks, cumulative length of longitudinal tears and exposed steel cords.
It then sets the detection methods, how results are judged and what the test report contains, with an informative annex giving a report template. It is written for belts used in coal mines, while other industries may apply it as a reference. Issued on 6 February 2023, it has applied since 6 August 2023.
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Document preview — NB/T 11127-2023
National Standard of the People's Republic of China
- ICS
- 53.040.20
- Classification
- D 93
Issued by: National Energy Administration of the People's Republic of China
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Test item
- 5 Detection method
- 6 Test result judgment and test report
- Appendix A (Informative) Conveyor Belt Scrap Inspection Report Style
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules for Standardization Documents" drafting.
1 Scope
This document specifies the inspection items, inspection methods and judgment of inspection results for scrapped steel cord conveyor belts (hereinafter referred to as "conveyor belts") determination and test reports, etc.
This document is applicable to scrap detection of steel cord conveyor belts in use in coal mines. Steel cord conveyor belts used in other industries can be implemented as a reference.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 3836.2 Explosive atmospheres Part 2. Equipment protected by flameproof enclosure "d"
GB/T 3836.18 Explosive atmospheres Part 18. Intrinsically safe electrical systems
MT/T 668 Steel Cord Core Flame Retardant Conveyor Belt for Coal Mine
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Scrap
The conveyor belt has been running for a certain number of years or the quality of use has declined due to broken cores and wear, reaching the level where safe operation cannot be guaranteed.
3.2 Broken core
During the use of the conveyor belt, the wire rope core is broken due to uneven force.
3.3 Damaged area
The sum of the area with surface scratches, rubber surface defects, air bubbles, delamination, pits and other defects.
4 Test items
Conveyor belt scrap detection includes the following items. a) Operating life. b) Appearance quality.
1) The damaged area of the belt surface;
2) Covering layer thickness;
3) Depth of cracks on the surface of the covering layer;
4) Cumulative length of longitudinal tear;
5) Exposed wire rope core.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 3836.18-2024 — Explosive atmospheres - Part 18: Intrinsically safe electrical systems
GB/T 3836.2-2021 — Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures 'd'
MT/T 668-2019 — Steel cord fire resistant conveyor belting for coalmine
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NB/T 11127-2023
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