GB/T 8979-2025 English PDF
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GB/T 8979: Historical versions
| Standard ID | USD | BUY PDF | Delivery | Standard Title (Description) | Status |
| GB/T 8979-2025 | 185 | Add to Cart | Auto, 9 seconds. | Pure nitrogen, high purity nitrogen and ultra pure nitrogen | Valid |
| GB/T 8979-2008 | 70 | Add to Cart | Auto, 9 seconds. | Pure nitrogen and high purity nitrogen and ultra-pure nitrogen | Valid |
| GB/T 8979-1996 | 199 | Add to Cart | 2 days | Pure nitrogen | Obsolete |
| GB 8979-1988 | 199 | Add to Cart | 2 days | Pure nitrogen | Obsolete |
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GB/T 8979-2025: Pure nitrogen, high purity nitrogen and ultra pure nitrogen
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT8979-2025GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.100.20 CCS G 86 Replacing GB/T 8979-2008 Pure nitrogen, high purity nitrogen and ultra pure nitrogen Issued on: AUGUST 29, 2025 Implemented on: MARCH 1, 2026 Issued by. State Administration for Market Regulation; Standardization Administration of China.
Table of Contents
Preface... 3 1 Scope... 5 2 Normative References... 5 3 Terms and Definitions... 6 4 Technical Requirements... 6 5 Sampling... 7 6 Test Methods... 7 7 Inspection Rules... 9 8 Marking, Packaging, Transportation, Storage and Safety Information... 11 References... 13 Pure nitrogen, high purity nitrogen and ultra pure nitrogen1 Scope
This document specifies the technical requirements, sampling, test methods, inspection rules, marking, packaging, filling, transportation, and storage requirements for pure nitrogen, high purity nitrogen, and ultra pure nitrogen; and provides safety information for these products. This document applies to gaseous and liquid pure nitrogen, high purity nitrogen, and ultra pure nitrogen obtained from or purified from air.2 Normative References
The following documents, through normative references herein, constitute essential provisions of this document. For dated references, only the edition cited applies; for undated references, the latest edition of the referenced document (including any amendments) applies. GB 190 Packing symbol of dangerous goods GB/T 3864 Industrial nitrogen GB/T 5099 (All Parts) Seamless steel gas cylinders GB/T 5832.2 Gas analysis - Determination of Trace Moisture - Part 2.Dew Point Method GB/T 5832.3 Gas analysis - Determination of moisture in gases - Part 3.The method of cavity ring-down spectroscopy GB/T 6285 Determination of trace oxygen in gases - Electrochemical method GB/T 7144 Colored cylinder mark for gases GB/T 8170 Rules of rounding off for numerical values and expression and judgement of limiting values GB/T 11640 Seamless aluminum alloy gas cylinders GB/T 14194 Rules for filling of compressed gas cylinders GB 15258 General rules for preparation of precautionary label for chemicals GB/T 16804 Precautionary labels for gas cylinders GB/T 24159 Welded insulated cylinders GB/T 28726 Gas analysis - Gas chromatograph with helium ionization detector GB/T 33145 Large capacity seamless steel gas cylinders GB/T 34528 Regulation for filling of cylinder bundle GB/T 43306 Gas analysis - Sampling Guidelines JB/T 6898 Cryogenic Liquid Storage and Transportation Equipment - Safety Regulation for Operation TSG R0005 Supervision regulation on safety technology for transportable pressure vessel TSG 23 Regulation on safety technology for gas cylinder3 Terms and Definitions
This document does not contain any terms or definitions that require further clarification.4 Technical Requirements
The technical requirements for pure nitrogen, high purity nitrogen, and ultra pure nitrogen shall conform to the provisions of Table 1.5 Sampling
Sampling shall conform to the provisions of GB/T 43306.6 Test Methods
6.1 Purity of Pure Nitrogen, High purity Nitrogen, and Ultra Pure Nitrogen 6.1.1 Calculation of Total Impurity Content 6.1.1.1 The total impurity content in gaseous pure nitrogen, high purity nitrogen, and ultra pure nitrogen is calculated according to formula (1). Where. x1 -- Hydrogen content (mole fraction); x2 -- Oxygen content (mole fraction); x3 -- Carbon monoxide content (mole fraction); x4 -- Carbon dioxide content (mole fraction); x5 -- Methane content (mole fraction); 28726, GB/T 37182, or other equivalent methods. In case of disagreement over the determination results, the method specified in GB/T 6285 shall be the arbitration method. 6.2.1.3 The contents of hydrogen, argon, carbon monoxide, carbon dioxide, and methane may also be determined according to other equivalent methods specified in 6.2.2.In case of disagreement over the determination results, the method specified in GB/T 28726 shall be the arbitration method. 6.2.2 Other Equivalent Determination Methods 6.2.2.1 The content of hydrogen, argon, carbon monoxide, carbon dioxide, and methane can be determined according to the method specified in GB/T 37182. 6.2.2.2 The content of hydrogen, carbon monoxide, and methane can be determined according to the method specified in GB/T 28124. 6.2.2.3 The content of carbon monoxide, carbon dioxide, and methane can be determined according to the method specified in GB/T 8984. 6.3 Determination of Moisture Content 6.3.1 Determination of Moisture Content in Pure Nitrogen Perform the determination according to GB/T 5832.2.It can also be determined according to GB/T 5832.1, GB/T 5832.4, or other equivalent methods. In case of disagreement over the determination results, the method specified in GB/T 5832.2 shall be the arbitration method. 6.3.2 Determination of Moisture Content in High purity Nitrogen and Ultra Pure Nitrogen Perform the determination according to GB/T 5832.3.The results may be determined according to GB/T 5832.1, GB/T 5832.2, GB/T 5832.4, or other equivalent methods. In case of disagreement regarding the test results, the method specified in GB/T 5832.3 shall be the arbitration method. 6.4 Exhaust Gas Treatment During the test, the accumulation of pure nitrogen, high purity nitrogen, and ultra pure nitrogen in the room shall be prevented.7 Inspection Rules
7.1 Batching, Sampling, Judgment, and Re-inspection of Bottled Pure Nitrogen and High purity Nitrogen ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
