BS ISO 9809-4:2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials
7 Design
8 Construction and workmanship
9 Type approval procedure
10 Batch tests
11 Tests/examinations on every cylinder
12 Certification
13 Marking
Annex A (informative) - Description and evaluation of
        manufacturing imperfections and conditions for
        rejection of seamless steel gas cylinders at the
        time of final inspection by the manufacturer
Annex B (normative) - Ultrasonic examination
Annex C (informative) - Type approval certificate
Annex D (informative) - Acceptance certificate
Bibliography

Defines the minimum requirements for the material, design, construction and workmanship, manufacturing processes, examinations, and tests at manufacture of refillable seamless stainless steel gas cylinders of water capacities from 0,5 l up to and including 150 l for compressed, liquefied, and dissolved gases.

This part of ISO9809 specifies the minimum requirements for the material, design, construction and workmanship, manufacturing processes, examinations, and tests at manufacture of refillable seamless stainless steel gas cylinders of water capacities from 0,5l up to and including 150l for compressed, liquefied, and dissolved gases. This part of ISO9809 is applicable to cylinders with a maximum actual tensile strength, R_ma, of less than 1100MPa.

NOTE If so desired, cylinders of water capacity less than 0,5l and between 150l and 500l can be manufactured to be in full compliance with this part of ISO9809.