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GB/T 21844-2008 English PDF

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US$354.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21844-2008: Standard test method for concentration limits of flammability of chemicals (vapors and gases)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21844-2008	354	Add to Cart	3 days	Standard test method for concentration limits of flammability of chemicals (vapors and gases)	Valid

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Basic data

Standard ID: GB/T 21844-2008 (GB/T21844-2008)
Description (Translated English): Standard test method for concentration limits of flammability of chemicals (vapors and gases)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300
Word Count Estimation: 18,184
Date of Issue: 2008-05-12
Date of Implementation: 2008-09-01
Quoted Standard: ASTM E171; ASTM E582; ASTM E1445; ASTM E1515; ASTM E2079; NFPA 69
Adopted Standard: ASTM E681-2004, IDT
Regulation (derived from): Announcement of Newly Approved National Standards 2008 No. 8 (No. 121 overall)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the test temperature and atmospheric pressure, chemical vapor and air to form a combustible mixture of upper and lower limits of the concentration of the combustion method. Tests can be used in an inert gas as a diluent, but not a strong oxidizing substances than air. This standard applies to vapor and gaseous substances.

GB/T 21844-2008: Standard test method for concentration limits of flammability of chemicals (vapors and gases)

---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.
Standard test method for concentration limits of flammability of chemicals (vapors and gases) ICS 13.300 A80 National Standards of People's Republic of China Compound (steam and gas) concentration limits of flammability Standard Test Method Posted 2008-05-12 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is identical with the American Society for Testing and Materials (ASTM) E681. 04 "compound (steam and gas) concentration limits of flammability Standard Test Method "(in English). Appendix A of this standard is a normative appendix, Appendix B is an informative annex. This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points. This standard was drafted. China Inspection and Quarantine Science Research Institute, a national civil blasting equipment Quality Supervision and Inspection Center. The main drafters of this standard. Falls Apart, Wang Lifeng, Wang Junbing at Wen Lin, Zhou Xin, Xu Sen EXPLOSIVES. This standard is the first release. Compound (steam and gas) concentration limits of flammability Standard Test Method

1 Scope

This standard specifies the test temperature and at atmospheric pressure chemical vapor and air form combustion of the combustible mixture and the upper concentration limit Determination of the degree. Test can be used as an inert diluent gas, but can not use strong oxidizing substance than air. This standard applies to vapor and gaseous substances. Note 1. The lower flammable limit (LFL) and upper flammable limit (UFL) were also sometimes called lower explosive limit (LEL) and the upper explosive limit (UEL). However, LEL and UEL can sometimes represent concentration, but this limits the non-standard definitions, so when referencing LEL and UEL, we must clarify the exact definition.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For cited documents with dates, with its After all of the amendments (not including errata content) or revisions do not apply to this standard, however, we are encouraged to reach agreement in accordance with this standard All parties that proposed to use the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Standard Specification for standard atmospheric pressure ASTME171 conditioning and testing of flexible barrier materials ASTME582 gas mixture and the minimum ignition energy quenching distance Standard Test Method Standard Terminology Relating ASTME1445 potentially dangerous chemicals Standard Test Method for ASTME1515 minimum explosive concentration of combustible dust ASTME2079 limits of gases and vapors in oxygen (oxidizer) Standard Test Method for concentrations NFPA69 standard explosion protection system

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Under test conditions the concentration of combustibles is possible to minimize the spread of flame in a homogeneous mixture of a gaseous fuel and an oxidizing agent. 3.2 In this test, the flame front reaches the wall from sources of ignition upward or outward, or at least 13mm away from the wall at the movement. Outward expansion Casual sports legend flame front horizontal component exists. 3.3 Under test conditions the maximum possible concentration of combustible flame propagation in a homogeneous mixture of gaseous fuel and an oxidizing agent. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21844-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21844-2008_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 GB/T 21844-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21844-2008_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.