ISO 18119:2018/Amd.1:2021 Gas cylinders — Seamless steel and seamless aluminium-alloy gas cylinders and tubes — Periodic inspection and testing
标准简介
Gas cylinders — Seamless steel and seamless aluminium-alloy gas cylinders and tubes — Periodic inspection and testing是于2018-05发布的ISO标准，适用于全球。标准截图
标准文档说明
标准文档类型为Gas cylinders — Seamless steel and seamless aluminium-alloy gas cylinders and tubes — Periodic inspection and testing高清PDF版本（文字版），标准文档内可进行搜索，可以复制原文，可粘贴。标准部分原文
Gas cylinders — Seamless steel and seamless aluminium-
alloy gas cylinders and tubes — Periodic inspection and testing
AMENDMENT 1
Clause 4
Add the following to the list of abbreviated terms and symbols:
a/t flaw depth ratio (in per cent)
8.1
Replace the second paragraph with the following:
Particular attention shall be given to cylinders containing flammable, oxidizing, corrosive or toxic gases to eliminate risks at the internal inspection stage. See Annex C for a list of gases that are corrosive to steel cylinder material.
Table A.1
Replace footnote f) with the following:
Corrosiveness is with reference to human tissue (see ISO 13338) and NOT cylinder material (e.g. as indicated in Annex C for steel).
B.1
Replace the fourth paragraph with the following:
If the defect size is such that it has reached limits of depth or extent, the remaining wall thickness shall be checked with an ultrasonic device. The wall thickness may be less than the minimum guaranteed wall thickness, when authorized by the competent authority taking into consideration the severity of the defect and safety factors. ISO/TR 22694, and Figures B.6 and B.7 may be used for guidance to evaluate the acceptable size of the defect. When the flaw depth ratio (a/t) is less than or equal to 5 %, the flaw length may be extended for the parallel length of the cylinder.
B.3.3, Table B.3
In the third column (Linear flaws) for seamless steel cylinders, add a second paragraph as follows:
Depth less than or equal to 0,05 t whatever the length (see Figure B.6).
m
In the third column (Linear flaws) for seamless aluminium-alloy cylinders, add a second paragraph as follows:
Depth less than or equal to 0,05 t whatever the length (see Figure B.7).
m
B.3.3, Figure B.6
Replace Figure B.6 with the following:
Key
X flaw length, in mm R reject
Y flaw depth ratio (a/t), in per cent A accept
SOURCE: ISO/TR 22694:2008, Figure 19 (modified).
Figure B.6 — Maximum allowable imperfection sizes for seamless steel cylinders of various compositions
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