Overview
EN ISO 9809-3:2019 - Gas cylinders - Design, construction and testing of refillable seamless steel gas cylinders and tubes - Part 3: Normalized steel cylinders and tubes (ISO 9809-3:2019) is a CEN-adopted international standard that specifies minimum requirements for the material, design, manufacture and testing of refillable seamless steel gas cylinders and tubes with water capacities up to and including 450 L. Applicable to cylinders for compressed, liquefied and dissolved gases, this part covers normalized and normalized-and-tempered steels and supersedes EN ISO 9809-3:2010.
Key Topics and Requirements
- Scope and applicability: Refillable seamless steel cylinders and tubes (≤ 450 L) for a range of gases; normalized steel grades.
- Materials and heat treatment: Minimum material controls, chemical composition checks and heat-treatment provisions for normalized steels.
- Design provisions: Requirements for shell thickness, end (head/base) design, neck and neck rings, foot rings and dimensional drawings.
- Manufacturing and workmanship: Wall-thickness control, surface imperfection assessment, straightness, mean diameter and out-of-roundness limits.
- Examination and testing:
- Ultrasonic examination for wall integrity
- Hydraulic burst and proof pressure tests
- Pressure cycling (fatigue) tests
- Volumetric expansion testing
- Tensile, impact and hardness tests
- Leak, capacity and thread torque/shear checks
- Type approval and batch testing: Prototype testing procedures, type approval certificates and routine batch acceptance tests.
- Certification and marking: Requirements for documentation and marking to ensure traceability and regulatory compliance.
- Annexes: Normative and informative annexes include manufacturing imperfection descriptions, ultrasonic exam guidance and example certificates.
Applications and Users
EN ISO 9809-3:2019 is intended for organizations and professionals involved with the life-cycle of gas cylinders:
- Manufacturers of refillable seamless steel cylinders and tubes
- Design engineers specifying cylinder geometry and materials
- Testing and inspection laboratories performing type approval, batch and routine tests
- Quality and compliance teams ensuring conformity with CEN/ISO requirements
- Gas suppliers, transport operators and safety regulators managing cylinder use, recertification and transport safety
Using EN ISO 9809-3 helps ensure safe, reliable performance of normalized steel cylinders used for compressed, liquefied and dissolved gases in industrial, medical and specialty gas applications.
Related Standards
- Other parts of the ISO 9809 series (related design/construction/testing guidance for seamless steel cylinders)
- CEN/TC 23 technical documents and national standards implementing EN ISO 9809-3:2019
Keywords: EN ISO 9809-3:2019, gas cylinders, normalized steel cylinders, refillable seamless steel, cylinder testing, hydraulic burst test, ultrasonic examination, type approval.