GB/T 4844-2011 PDF in English
GB/T 4844-2011 (GB/T4844-2011, GBT 4844-2011, GBT4844-2011)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 4844-2011 | English | 150 |
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Pure helium, high pure helium and ultra-pure helium
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| GB/T 4844.1-1995 | English | 199 |
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Industrial helium
| Obsolete |
| GB 4844-1984 | English | 199 |
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Gaseous helium
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Standards related to (historical): GB/T 4844-2011
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GB/T 4844-2011: PDF in English (GBT 4844-2011) GB/T 4844-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.100.20
G 86
Replacing GB 4844.2-1995 and GB/T 4844.3-1995
Pure Helium, High Pure Helium and Ultra Pure Helium
ISSUED ON. DECEMBER 30, 2011
IMPLEMENTED ON. OCTOBER 1, 2012
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
3. No action is required - Full-copy of this standard will be automatically &
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Table of Contents
Foreword ... 3
1 Application Scope ... 5
2 Normative References ... 5
3 Specifications ... 6
4 Inspection Rules ... 6
5 Test Methods ... 7
6 Packaging, Marking, Storage and Transportation and Safety Warnings... 8
Annex A (Normative) Determination of the Content of Neon, Hydrogen, Oxygen
+ Argon, Nitrogen, Carbon Monoxide, Carbon Dioxide and Methane in Helium
... 10
Annex B (Normative) Calculation of Helium Volume ... 13
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB 4844.2-1995, Pure Helium and GB/T 4844.3-1995, High
Purity Helium. This Standard integrates the content of GB 4844.2-1995 and GB/T
4844.3-1995. Compared with GB 4844.2-1995 and GB/T 4844.3-1995, the major
technical changes of this Standard, in addition to editorial changes, are as follows.
-- the application scope is modified and ultra pure helium and liquid helium are
added (see Article 1; Article 1 of GB 4844.2-1995 and Article 1 of GB/T 4844.3-
1995);
-- the normative references are modified (see Article 2; Article 2 of GB 4844.2-1995
and Article 2 of GB/T 4844-1995);
-- the specifications for pure helium and high pure helium are modified and the
specifications for ultra pure helium are added (Table 1; Table 1 of GB 4844.2-1995
and Table 1 of GB/T 4844.3-1995);
-- the test methods are modified (see Article 5; Article 4 of GB 4844.2-1995 and
Article 5 of GB/T 4844.3-1995);
-- the technical content of packaging, storage and transportation of products is
modified (see Article 6; Article 5 of GB 4844.2-1995 and Article 6 of GB/T 4844.3-
1995);
-- the safety warnings about helium are added (see 6.2);
-- the volume conversion coefficient K value of helium at different temperature under
the pressure of 16.5 MPa ~ 30.0 MPa (see Table B.2, Table B.3 and Table B.4).
This Standard was proposed by China Petroleum and Chemical Industry Association.
This Standard shall be under the jurisdiction of the National Standardization Technical
Committee on Gases (SAC/TC 206).
The drafting organizations of this Part. Southwest Research and Design Institute of
Chemical Industry, Chengdu Natural Gas General Plant, Shanghai Huaai
Chromatography Co., Ltd., Beijing AP BAIF Gases Industry Co., Ltd., Xi’an Dingyan
Technology Co., Ltd.
The main drafters of this Part. Liu Zejun, Fu Yongcheng, Fang Hua, Li Jianhao, Chen
Yali, Luo Yuguo, Shi Zhaoqi.
The previous editions of GB 4844.2-1995 are as follows.
-- GB 4844-1984;
Pure Helium, High Pure Helium and Ultra Pure Helium
1 Application Scope
This Standard specifies the specifications, inspection rules, test methods, and product
packaging, marking, storage and transportation and safety warnings of gaseous
helium and liquid helium.
This Standard applies to pure helium, high pure helium and ultra pure helium which
are extracted using the cryogenic method and mainly used for light-guide fibre, laser,
welding and cutting, diving breathing, cryogenic superconductor, supercharge,
cleaning, protective gas and so on.
Molecular formula. He.
Relative molecular mass. 4.002 602 (according to 2007 International Relative Atomic
Masses).
2 Normative References
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced documents (including all
amendments) applies to this Part.
GB 190, Packing Symbol of Dangerous Goods
GB 5099, Seamless Steel Gas Cylinders
GB/T 5832.1, Gas Analysis – Determination of Moisture – Part 1. Electrolytic
Method
GB/T 5832.2, Gas Analysis – Determination of Moisture – Part 2. Dew Point Method
GB/T 5832.3, Determination of Moisture in Gases – Part 3. The Method of Cavity
Ring-down Spectroscopy
GB 7144, Coloured Cylinder Mark for Gases
GB 14194, Rules for Filling of Permanent Gas Cylinders
JB/T 5905, Cryogenic Liquid Containers Insulated with Evacuated Multilayer
Insulations
JB 6898, Storage and Shipping Device for Low Temperature Liquid – Safety Use
Manual
in Annex A to this Standard shall be used as the arbitration method.
5.3 Determination of water content
5.3.1 Determination of water content in pure helium and high pure helium
As specified in GB/T 5832.1 or GB/T 5832.2. In case of any dispute in the test result,
the method specified in GB/T 5832.2 shall be used as the arbitration method.
5.3.2 Determination of water content in ultra pure helium
As specified in GB/T 5832.3.
6 Packaging, Marking, Storage and Transportation
and Safety Warnings
6.1 Packaging, marking and storage and transportation
6.1.1 The packaging, storage and transportation of helium shall be as specified in
Supervision Regulation on Safety for Gas Cylinder and Supervision Regulation on
Safety Technology for Stationary Pressure Vessel.
6.1.2 The gas cylinders for helium shall be as specified in GB 5099; the imported
helium cylinders shall conform to the relevant national regulations.
6.1.3 The packing containers of liquid helium shall be as specified in JB/T 5905; the
imported helium cylinders shall conform to the relevant national regulations.
6.1.4 The large-volume seamless steel gas cylinders and unit load cylinders shall
conform to relevant regulations.
6.1.5 The packing marks of helium shall be as specified in GB 190. The coloured
cylinder marks for helium shall be as specified in GB 7144.
6.1.6 The filling of gas cylinders shall be as specified in GB 14194.
6.1.7 The minimum pressure of bottled helium shall not be lower than 97% of the
nominal working pressure of gas cylinders at 20°C. The accuracy of pressure gauges
used for measurement shall not be lower than grade 1.5. The residual pressure of the
helium cylinders returned to factory shall not be lower than 0.2 MPa.
6.1.8 See Annex B for the volume calculation of helium under the conditions of 20°C
and 101.3 MPa.
6.1.9 Before the delivery of bottled helium, examine the nozzle and neck of gas
cylinders to confirm there is no leakage; put on the cylinder cap and vibration control
ring.
A.2.2 Carrier gas. high pure helium or ultra pure helium; its neon content shall be
one order of magnitude lower than that specified in Table 1.
A.2.3 Purifier. capable of purifying all component contents in helium carrier gas to
one order of magnitude lower than that specified for ultra pure helium in Table 1.
A.2.4 Standard specimen. prepared by using helium as base gas. All component
contents in the standard specimen for the analysis of pure helium shall be similar to
those specified in Table 1. All component contents (volume fraction) in the standard
specimen for the analysis of high pure helium and ultra pure helium are 1 × 10-6 ~ 5 ×
10-6.
A.3 Determination conditions
A.3.1 Chromatographic columns.
Column 1. used for the separation of neon, hydrogen, oxygen + argon and nitrogen. It
is a stainless-steel tube which is about 3 m long and about 3 mm in inner diameter; it
contains 5A molecular sieve which is about 1 m long and 0.25 mm ~ 0.40 mm in grain
size, and cocoanut active charcoal which is about 2 m long and 0.25 mm ~ 0.40 mm
in grain size. The degree of separation of the chromatographic column for all
components shall be greater than 1. The use of other equivalent chromatographic
columns is allowed.
Column 2. used for the separation of carbon monoxide, carbon dioxide and methane.
It is a stainless-steel tube which is about 0.5 m long and about 2 mm in inner diameter;
it contains TDX-01 of grain size 0.25 mm ~ 0.40 mm. The use of other equivalent
chromatographic columns is allowed.
A.3.2 Operating parameters. all operating parameters of the instruments shall be
selected in accordance with the instructions to the instruments and the requirements
for detection limits.
A.4 Test procedures
A.4.1 Start the instruments in accordance with their instructions and regulate all
operating parameters until the instruments operate normally.
A.4.2 Access standard specimen to the instruments and inject specimen after full
replacement to obtain a representative specimen. Repeat specimen injection for 3
times. Measure the chromatographic response values of all components; when the
relative deviation of two adjacent values is less than 5%, take their mean value.
A.4.3 Access specimen to be tested to the instruments under the...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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