GB 7957-2023 English PDF

Q: How long will the true-PDF of English version of GB 7957-2023 be delivered?

Upon your order, we will start to translate GB 7957-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Q: Can I share the purchased PDF of GB 7957-2023_English with my colleagues?

Yes. The purchased PDF of GB 7957-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Q: Does the price include tax/VAT?

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). Avoidance of Double Taxation Agreements (DTAs) between Singapore and 100+ Countries: https://www.iras.gov.sg/taxes/international-tax

Q: Do you accept my currency other than USD?

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.

Q: Should I purchase the latest version GB 7957-2023?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 7957-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$349.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB 7957-2023: Safety technical requirement for cap lamps in coal mine
Status: Valid

GB 7957: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 7957-2023	349	Add to Cart	4 days	Safety technical requirement for cap lamps in coal mine	Valid
GB/T 7957-2017	359	Add to Cart	4 days	General requirements for construction, performance and explosion protected testing of cap-lights for use in mines susceptible to firedamp	Valid
GB 7957-2003	279	Add to Cart	3 days	General requirements for safety of cap lamp	Obsolete
GB/T 7957-1987	199	Add to Cart	2 days	Safety cap lamp for mines	Obsolete

Similar standards

GB/T 3836.9 GB/T 3836.8 GB/T 3836.4 GB/T 7957 GB 7958 GB 3836.15

Basic data

Standard ID: GB 7957-2023 (GB7957-2023)
Description (Translated English): Safety technical requirement for cap lamps in coal mine
Sector / Industry: National Standard
Classification of Chinese Standard: K35
Classification of International Standard: 29.260.20
Word Count Estimation: 18,110
Date of Issue: 2023-09-08
Date of Implementation: 2025-04-01
Older Standard (superseded by this standard): GB/T 7957-2017
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB 7957-2023: Safety technical requirement for cap lamps in coal mine

---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 29.260.20 CCSK35 National Standards of People's Republic of China Replace GB/T 7957-2017 Safety technical requirements for miner's lamps used in coal mines Published on 2023-09-08 and implemented on 2025-04-01 State Administration for Market Regulation Released by the National Standardization Administration Committee

Preface III 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Product Category 1 5 Requirement 2 6 Test method 7 7 Inspection Rules 10 8 Marking, packaging, transportation and storage12

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 7957-2017 "General requirements for structure, performance and explosion-proof testing of miner's lamps for gas environments" and is consistent with GB/T 7957- Compared with.2017, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Added requirements and test methods for thermal ignition compliance (see 5.5 and 6.19); b) Changed the requirements and test methods for spark ignition compliance (see 5.6 and 6.20, 5.6 and 6.22 of the.2017 edition); c) Delete the flame retardant requirements and test methods for enclosures (see 5.3.1.4 and 6.5 of the.2017 edition); d) Delete the requirement for electrical connection voltage after assembly (see 5.3.10 of the.2017 edition); e) Delete the thermal drastic change requirements and test methods for light-transmitting covers (see 5.3.14 and 6.16 of the.2017 edition); f) The requirements for the general provisions of overcurrent protection devices have been changed (see 5.7, 5.4.1 of the.2017 edition); g) The requirements and test methods for thermal circuit breakers are deleted (see 5.4.3.2 and 6.20 of the.2017 edition); h) The requirements and test methods for capacitance are deleted (see 5.11 and 6.32 of the.2017 edition); i) Delete the ergonomic requirements (see 5.12 of the.2017 edition); j) The current limiting resistor test method is deleted (see 6.21.3 of the.2017 edition). This document refers to IEC 60079-35-1.2011 "Explosive Environments Part 35-1.General Requirements Structure of Mining Lamps for Gas Environments" and explosion-proof test" and IEC 60079-35-2.2011 "Explosive environments Part 35-2.Performance of miner's lamps for gas environments and other related Safety Test" was drafted, and the degree of consistency is non-equivalent. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed and managed by the State Mine Safety Supervision Bureau. The previous versions of this document and the documents it replaces are as follows. ---First published as GB 7957-1987 in 1987, first revised in.2003; ---In the second revision in.2017, GB/T 7957.2-2009 "Miner's Lamp for Gas Environment Part 2.Performance and Others" "Relevant Safety Matters" (the previous releases of GB/T 7957.2-2009 are. first released in.2009); ---This is the third revision. Safety technical requirements for miner's lamps used in coal mines

1 Scope

This document stipulates the performance and safety requirements, marking, packaging, transportation and storage of miner's lamps for coal mines (hereinafter referred to as "miner's lamps"). In order to facilitate the classification of products in technical regulations, the corresponding test methods are described. This document applies to miner's lamps, including miner's lamps used in coal mines and miner's lamps that power other equipment.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 191 Packaging, storage and transportation pictorial mark GB/T 2423.4 Environmental testing of electrical and electronic products Part 2.Test method Test Db. Alternating damp heat (12h 12h cycle) GB/T 3836.1-2021 Explosive atmosphere Part 1.General requirements for equipment GB/T 3836.3-2021 Explosive atmospheres Part 3.Equipment protected by increased safety type "e" GB/T 3836.4-2021 Explosive atmospheres Part 4.Equipment protected by intrinsically safe "i" GB/T 4208 Shell protection level (IP code) GB/T 16935.3-2016 Insulation coordination of equipment in low-voltage systems Part 3.Antifouling by coating, potting and molding Protect MT/T 395-2007 Mining lamp protector MT/T 818.10-2009 Coal mine cables Part 10.Miner’s cap lamp cord for coal mines MT/T 1051-2007 Lithium-ion battery for miner’s lamp

3 Terms and definitions

The following terms and definitions as defined in GB/T 3836.1-2021 and GB/T 3836.4-2021 apply to this document. 3.1 battery containerbatterycontainer The casing that holds the battery. Note. The tank cover is part of the battery tank. 3.2 effectiveworkingperiod The time that the miner's lamp continues to operate with the minimum luminous intensity specified in this document under the operating current specified by the manufacturer.

4 product categories

4.1 By product structure The product is portable and can be fixed on a mining helmet. According to the different connection methods of the lamp head part and the battery part, it can be divided into the following ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB 7957-2023_English be delivered?

Answer: Upon your order, we will start to translate GB 7957-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB 7957-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB 7957-2023_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.

Question 5: Should I purchase the latest version GB 7957-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 7957-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.