ISO 11513:2019

Overview

ISO 11513:2019 specifies minimum requirements for the design, construction, testing, use and periodic inspection of refillable welded steel gas cylinders intended for sub‑atmospheric gas packaging (excluding acetylene). The standard applies to the cylinders themselves (irrespective of internal adsorbents, media or gases), with a test pressure ≤ 42 bar and water capacity 0.5 L to 12 L, intended to facilitate sub‑atmospheric storage of liquefied and compressed gases as adsorbed gases. ISO 11513:2019 is aligned for reference in the UN Model Regulations and provides requirements for manufacture, inspection at time of fill and periodic inspection.

Key Topics

• Scope & definitions: Clear limits (exclusion of acetylene) and terminology relating to sub‑atmospheric gas packaging and cylinder components.
• Materials & stress relieving: Requirements for steel materials and post‑forming heat treatment to control residual stresses.
• Design requirements: Wall thickness calculation, end/boss design (machined plug or semi‑ellipsoidal/torispherical ends), minimum thickness, and pressure relief device considerations.
• Manufacture & workmanship: Welding qualification, seam integrity, valve protection and boss thread specifications.
• Examination & testing at manufacture:
  • Type approval tests (e.g., hydraulic burst, pressure cycling)
  • Batch tests (tensile, bend, macroscopic/radiographic weld examination)
  • Tests on every cylinder and criteria for failure
• Inspection at time of fill & periodic inspection: Procedures and intervals for in‑service checks (normative Annexes A and B).
• Marking and certification: Required identification and documentation for compliance.

Applications

ISO 11513:2019 is used by:

• Cylinder manufacturers designing and producing welded steel cylinders for sub‑atmospheric gas packaging.
• Testing laboratories conducting type‑approval, batch and routine tests.
• Filling stations and gas suppliers performing inspections at time of fill and periodic testing.
• Regulatory bodies and transport authorities referencing safe packaging standards for compressed/liquefied gases.
• Safety engineers and procurement teams specifying compliant cylinders for medical, laboratory, industrial and specialty gas applications.

Related standards

ISO 11513:2019 references and complements other ISO standards, including:

• ISO 10286 (terminology)
• ISO 11117 (valve protection caps)
• ISO 17636-1 / ISO 17637 (weld radiographic/visual testing)
• ISO 9809-3 (seamless cylinder design) and welding/test standards (ISO 15614‑1, ISO 4136)

Using ISO 11513:2019 ensures consistent safety, manufacturability and international acceptance for welded steel cylinders used in sub‑atmospheric gas packaging. Keywords: ISO 11513:2019, gas cylinders, welded steel cylinders, sub‑atmospheric gas packaging, periodic inspection, cylinder design, manufacturer testing.