GB/T 34347-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 34347-2017 | English | 320 |
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Periodic inspection and evaluation of cryogenic insulated cylinders
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GB/T 34347-2017: Periodic inspection and evaluation of cryogenic insulated cylinders---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/GBT34347-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.020.30
J 74
Periodic inspection and evaluation of cryogenic insulated
cylinders
Issued on. OCTOBER 14, 2017
Implemented on. APRIL 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Inspection agencies... 5
4 Inspection of welded insulated gas cylinders... 5
5 Inspection of gas cylinder for automobile... 10
6 Other work... 13
Appendix A (Informative) Daily inspection record of cryogenic insulated cylinders 14
Appendix B (Informative) Method for measuring the depression size of the shell of
cryogenic insulated cylinders... 15
Appendix C (Informative) Periodic inspection report of welded insulated cylinder.. 17
Appendix D (Informative) Periodic inspection report of LNG cylinders for automobiles
... 21
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by AND shall be under the jurisdiction of the National Gas
Cylinder Standardization Technical Committee (SAC/TC 31).
Drafting organizations of this standard. Dalian Boiler and Pressure Vessel Inspection
and Research Institute, Changzhou Branch of Jiangsu Special Equipment Safety
Supervision and Inspection Research Institute, China Special Equipment Inspection and
Research Institute, Shanghai Special Equipment Supervision and Inspection
Technology Research Institute, Beijing Tianhai Industry Co., Ltd., Ultra-Cryogenic
Engineering System (Changzhou) Co., Ltd., Guangdong Special Equipment Inspection
and Research Institute, Jiangsu Baocheng Special Equipment Inspection Co., Ltd.,
Suzhou Rongtai New Special Equipment Technology Inspection Co., Ltd., Te Anjie
(Jiangsu) New Energy Technology Co., Ltd..
The main drafters of this standard. Wang Liping, Han Bing, Ning Ye, Yin Airong, Zhang
Hejun, Xu Huixin, Tan Yue, Huang Qianghua, Tian Feng, Yang Jin, Yin Jinsong.
Periodic inspection and evaluation of cryogenic insulated
cylinders
1 Scope
This standard specifies the basic methods and technical requirements, for periodic
inspection and evaluation of in-use cryogenic insulated cylinders (including welded
thermal insulation gas cylinders and automotive liquefied natural gas cylinders).
This standard is applicable to the periodic inspection and evaluation of the refillable
welded insulated gas cylinders -- which are used under normal ambient temperature (-
40 °C ~ 60 °C), whose medium is liquid oxygen, liquid nitrogen, liquid argon, liquid
carbon dioxide, liquid nitrous oxide, liquefied natural gas and other cryogenic liquids,
whose design temperature is not higher than -196 °C, whose nominal working pressure
is 0.2 MPa ~ 3.5 MPa. This standard is also applicable to the periodic inspection and
evaluation of the refillable welded insulated gas cylinders for automobile use -- which
is used at normal ambient temperature (-40 °C ~ 60 °C), whose medium is liquefied
natural gas, which is used as an automobile fuel tank, whose design temperature is not
higher than -196 °C, whose nominal working pressure is 0.6 MPa ~ 3.5 MPa.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 3864 Industrial nitrogen
GB/T 12135 Technological specification for inspection agency of gas cylinders
GB/T 12137 Methods for leakage test of gas cylinders
GB/T 16918 Bursting disc safety devices for gas cylinders
GB/T 18443.5 Testing method of performance for vacuum insulation cryogenic
equipment - Part 5.Static evaporation rate measurement
JB/T 6896 Surface clearness of air separation plant
3 Inspection agencies
The inspection agency, that undertakes the periodic inspection of gas cylinders, shall
meet the requirements of GB/T 12135, AND be approved by the special equipment
safety supervision and management authority, in accordance with TSG Z7001.
4 Inspection of welded insulated gas cylinders
4.1 Inspection period
4.1.1 The period of periodic inspection of gas cylinders shall not exceed 3 years.
4.2 Inspection items
The inspection items of gas cylinders include external inspection, safety accessories
inspection, valve and pipeline inspection, air tightness test, static evaporation rate
testing.
4.3 Preparation for inspection
4.3.1 Review of technical archives
4.3.2 Record
4.3.2.1 Check and record the manufacturing marks and inspection marks, on the
nameplate of the gas cylinders one by one. The records include the country of
manufacture, the cylinder manufacturing license number, the name of the manufacturer,
the cylinder number, the product standard number, the standard name, the year and
month of manufacture, the nominal working pressure, the test pressure of the liner, the
medium contained, the nominal volume, the maximum filling volume, the net weight
of gas cylinder, the date of last inspection.
4.3.3 Disposal of in-cylinder medium
4.3.3.1 Appropriate methods shall be taken, to discharge the medium in the cylinder and
properly handle it, under the conditions of ensuring safety, hygiene, non-polluting the
environment.
4.3.3.2 For gas cylinders with unknown medium, valves that cannot be opened, safety
accessories that fail, they shall be stored separately and properly disposed of.
4.3.4 Surface cleaning and accessory removal
4.5 Inspection of safety accessories, valve, pipeline
4.5.1 Inspection of safety accessories
4.5.1.1 The safety accessories of the gas cylinder include. pressure gauge, safety valve,
bursting disc, level gauge. Safety accessories shall meet the relevant requirements of
TSG RF001, TSG ZF003, GB/T 16918, national standards or industry standards. It shall
select the products produced by manufacturing enterprises, that have obtained
corresponding manufacturing licenses, according to regulations. The models,
specifications, technical parameters shall be definite and clear.
4.5.1.5 Check the liquid level gauges one by one. It shall be judged as unqualified, if
finding the following defects.
4.5.2 Valve and pipeline inspection
4.5.2.1 Visually inspect OR check the cylinder valves one by one by a magnifying glass
of 5X ~ 10X. It shall be judged as unqualified, if finding the following defects.
4.5.3 Assembly of safety accessories and valves
4.5.3.1 After all the accessories, which are removed from the cylinder body, are
inspected and qualified, the surface shall be treated accordingly, according to the special
requirements of the medium contained; the assembly shall be carried out, according to
the requirements of the instruction manual. The seals used in the assembly shall not
have chemical reaction with the contained medium.
4.7 Static evaporation rate detection
The gas cylinders shall be tested for static evaporation rate one by one. The detection
method shall be the gas mass flow meter method or the weighing method.
5 Inspection of gas cylinder for automobile
5.1 Inspection period
5.1.1 The period of periodic inspection of gas cylinders shall not exceed 3 years.
5.2 Inspection items
The inspection items of gas cylinders include external inspection, safety accessories
inspection, valve and pipeline inspection (limited to the pipeline system within the gas
cylinder product range), fixture inspection, air tightness test, static evaporation rate
detection.
5.3 Preparation for inspection
5.4 External inspection
Carry out visual inspection OR use a magnifying glass of 5X ~ 10X to inspect the outer
surface of the gas cylinders one by one. It shall be judged as unqualified, if there are
following defects.
5.5 Inspection of safety accessories, valves, piping (limited to piping systems within
the scope of gas cylinder products)
5.5.1 Inspection of safety accessories
5.5.3 Assembly of safety accessories and valves
All accessories, which are removed from the cylinder, shall be assembled, according to
the requirements of the instruction manual, after passing the inspection, respectively.
The seals, which are used during assembly, must not react chemically with LNG.
5.6 Fixture inspection
For the inspection of fixtures, it shall be judged as unqualified, if the following defects
are found.
5.7 Air tightness test
5.7.1 The assembled gas cylinders shall be tested for air tightness one by one.
5.8 Detection of static evaporation rate
Gas cylinders shall be tested for static evaporation rate one by one. The detection
method shall be the gas mass flow meter method or the weighing method. The test
method shall refer to the requirements of GB/T 18443.5.
6 Other work
6.1 All gas cylinders, that have passed the inspection, shall be marked with regular
inspection marks and sprayed with inspection color codes, in accordance with the
provisions of TSG R0006.
6.2 The gas cylinders, that are determined to be unqualified after inspection and need
to be repaired, shall be sent to the original manufacturer OR the organization entrusted
by the original manufacturer, for repair.
6.3 The inspector shall fill the cylinder inspection and evaluation results, in the
cylinder's periodic inspection report (refer to Appendix C or Appendix D for the report
format).
6.4 For the gas cylinders judged to be scraped, it shall mark the "Scrap" on the
conspicuous position of the gas cylinders.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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