Valid

GB/T 4844-2011Pure Helium, High Pure Helium and Ultra Pure Helium (English PDF)

Preview PDF

This is a limited preview

Buy now to download the full PDF (8 pages)

Need quotation for your management?

Get a formal quotation for GB/T 4844-2011 in 30 minutes.

Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

Level / Type

National · Recommended

Issue date

December 30, 2011

Implementation date

October 1, 2012

Scope

GB/T 4844-2011 (Pure Helium, High Pure Helium and Ultra Pure Helium) is available as an English-translated PDF.

GB/T 4844-2011 is the Chinese standard "Pure Helium, High Pure Helium and Ultra Pure Helium". Its scope clause reads: 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). Its clauses include application scope; packaging, marking, storage and transportation.

It was issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on 2011-12-30 and took effect on 2012-10-01.

Found what you need?

Document preview — GB/T 4844-2011

National Standard of the People's Republic of China

ICS: 77.100.20
Classification: G 86

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

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

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.

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...

......

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

Referenced standards

Normative references

GB 5099 · GB 7144 · GB 14194 · JB 6898

Cited by

How to Download GB/T 4844-2011

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.