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NB/T 11540-2024 English PDF

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US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
NB/T 11540-2024: Methods for the determination of coal and rock abrasion resistance
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
NB/T 11540-2024	139	Add to Cart	3 days	Methods for the determination of coal and rock abrasion resistance	Valid

Basic data

Standard ID: NB/T 11540-2024 (NB/T11540-2024)
Description (Translated English): Methods for the determination of coal and rock abrasion resistance
Sector / Industry: Energy Industry Standard (Recommended)
Classification of Chinese Standard: D09
Classification of International Standard: 73.010
Word Count Estimation: 6,680
Date of Issue: 2024-05-24
Date of Implementation: 2024-11-24
Issuing agency(ies): National Energy Administration

NB/T 11540-2024: Methods for the determination of coal and rock abrasion resistance

---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.
ICS 73.010 CCSD09 Energy Industry Standards of the People's Republic of China Coal and rock - Determination of wear resistance Released on 2024-05-24 Implementation on November 24, 2024 The National Energy Administration released

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. Please note that some of the contents of this document may involve patents. The institution does not bear responsibility for identifying patents. This document was proposed by the China Coal Industry Association. This document is under the jurisdiction of the Coal Industry Coal Mine Safety Standardization Technical Committee. The drafting units of this document. Coal Science and Technology Research Institute Co., Ltd., Liaoning University of Engineering and Technology, and China University of Mining and Technology (Beijing). The main drafters of this document are. Sun Zhongxue, Li Hongyan, Shu Longyong, Sun Weiji, Liu Bo, Li Dan, Liu Xue, Wang Bin, Tu Qi, Liu Yufeng, Mao Lingtao. Coal and rock - Determination of wear resistance

1 Scope

This document specifies the instruments, equipment, specimens, test and measurement procedures for determining the wear resistance of coal and rock, the wear resistance index of coal and rock and Grading, etc. This document is applicable to the wear resistance test of coal and rock in the physical and mechanical properties test of coal and rock.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 23561.7-2009 Methods for determination of physical and mechanical properties of coal and rock Part 7.Determination of uniaxial compressive strength and softening coefficient Number calculation method

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Abrasion resistance The ability of a material to resist mechanical wear. 3.2 Rockwell hardness rockwel HRC The hardness value is determined by the depth of plastic deformation of the indentation. 3.3 ARI 10 times the average diameter (mm) of the worn test alloy steel needle tip. 4.Instruments and Equipment 4.1 Coal and rock abrasion resistance tester. 4.2 Alloy steel needle, the tensile strength of the alloy steel is 2GPa, the Rockwell hardness (HRC) is 54~56, the cone angle is 90°±0.5°, the needle tip is Initial wear amount ≤10μm. 4.3 High-power microscope, with a measurement accuracy of not less than 0.0001 mm. 4.4 Diamond cutting machines and stone cutting machines. 4.5 Vernier caliper. accuracy is 0.02mm. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of NB/T 11540-2024_English be delivered?

Answer: Upon your order, we will start to translate NB/T 11540-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of NB/T 11540-2024_English with my colleagues?

Answer: Yes. The purchased PDF of NB/T 11540-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.