INTERNATIONAL STANDARD
steeltubesofwatercapacity Gascylinders-Refillableseamless constructionandtesting between1501and30001-Design
Bouteilles a gaz-Tubes en acier sans soudurerechargeables dune contenance en eau de 1501α 30001 Conception construction et essais
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Contents
Page
Foreword VIntroduction. vi1 Scope. 12 Normative references. 13 Terms and definitions. 14 Symbols. 25 Inspection and testing. 36 Materials 6.1 General requirements 3 36.2 9 Controls on chemical position. Heat treatment. 5 46.4 Mechanical properties. Failure to meet test requirements. 5Design 6.5 57.1 Calculation of cylindrical shell thickness. 6 67.2 7.3 Design of tube ends. Design drawing.. 6 78 Construction and workmanship. 78.1 8.2 Surface imperfections. General. 78.3 Ultrasonic examination. 7 78.4 8.5 Dimensional tolerances. End closure （fitting) 7 78.5.1 8.5.2 Out-of-roundnes... Outside diameter. 78.5.3 Straightness. 8 78.5.5 8.5.4 Eccentricity Length. 8 88.5.6 Water capacity- Mas. 8Type approval procedure. 8.5.7 8 99.1 General requirements. Prototype tests. 6'6 9.2 Type approval test report. 10 69.4 Type approval certificat.. 1010 Batch tests 10.1 General requirements. 10 1010.2 Mechanical tests. 10.2.1 General requirements. 10 1010.2.2 Tensile test. 1110.3 Interpretation of results. 10.2.3 Impact testing. 11 1111 Tests on every tube. 1111.1 11.2 Hydraulic test. General. 11 1211.2.1 Proof pressure test. Volumetric expansion test. 1211.3 Hardness testing. 11.2.2 12 1211.4 Visual inspection. 13
11.5 Dimensional inspection. 11.5.1 Thickness.11.5.2 Diameter and length. Water capacity and mass.11.5.3 11.5.4 Neck threads and openings.
13 131313 1311.6 Ultrasonic non-destructive test. 1312 Special requirements for tubes for embrittlinggases. 12.1 General. .14 1412.2 12.3 Materials. Design 14 1412.4 Construction and workmanship 1412.4.1 12.4.2 Surface imperfections. General. 14 1412.5 Mechanical tests. 12.5.1 Tensile and impact tests. 15 1512.5.2 Hardness test. 1513 Inspection certificate. 1514 Marking 16Annex A (informative) Typical chemistry groupings for seamless steel tubes. 17Annex C (informative) Description and evaluation of manufacturing imperfections Annex B (normative) Ultrasonic examination. 18and conditions for rejection of seamless steel tubes at time of final inspectionby the manufacturer. 23Annex D (informative) Acceptance certificate. Annex E (informative) Type approval certificate. 29 31Annex F (informative) Bend stress calculation. 32Bibliography
Foreword
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The procedures used to develop this document and those intended for its further maintenance aredescribed in the ISO/IEC Directives Part 1. In particular the different approval criteria needed for the different types of ISo documents should be noted. This document was drafted in accordance with theeditorial rules of the ISO/IEC Directives Part 2 (see
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The mittee responsible forthis documentis ISO/TC 58 Gas cylinders Submittee SC 3 Cylinder design.
This second edition cancels and replaces the first edition (ISO 11120:1999) which has been technically revised by the following:
Annex A *Typical chemistry groupings for seamless steel tubes" is informative;一nickel chromium molydbenum steel has been added in 6.1.1 and Annex A as Group V;reduction of maximum sulfur content in 6.2.2 from 0 020 % to 0 010 %; also the sum of sulfur and phosphorus is reduced from 0 030 % to 0 025 %;-the modification of ultrasonic provisions for ultrasonic examination in 8.3 to include ultrasonicexamination for wall thickness and for imperfections also on the supplied tubing;:
- the provisions for design of tubes for embrittling gases have been revised.
It also incorporates ISO 11120:1999/Amd 1:2013.
