SIST EN ISO 18119:2019 PDF

Overview - SIST EN ISO 18119:2019 (ISO 18119:2018)

SIST EN ISO 18119:2019 specifies requirements for the periodic inspection and testing of seamless steel and seamless aluminium‑alloy gas cylinders and tubes to verify their integrity before being re‑introduced into service. It covers transportable cylinders (single or bundles) for compressed and liquefied gases with water capacities from 0.5 L up to 150 L (cylinders) and >150 L (tubes), and - where practical - cylinders smaller than 0.5 L. The standard is identical to EN ISO 18119:2018 and was prepared by ISO/TC 58 in cooperation with CEN/TC 23.

Key technical topics and requirements

• Scope and applicability - defines which seamless steel and aluminium‑alloy cylinders/tubes are covered and explicitly excludes acetylene and composite cylinders.
• Inspection intervals - guidance on timeframes between periodic inspections (see Annex A for periods).
• Inspection procedures - a complete list of periodic inspection and test procedures including preparation, depressurization, de‑valving and shot‑blasting where needed.
• Visual inspections - external visual inspection, neck and valve interface checks, and internal condition verification (including cylinders with footrings or internal coatings).
• Supplementary tests - procedures for additional examinations such as checks for heat damage in aluminium‑alloy cylinders and hammer tests on footring cylinders.
• Pressure and non‑destructive testing - methods include proof pressure tests, hydraulic volumetric expansion tests and ultrasonic testing (UT); calibration, acceptance criteria and interpretation are specified.
• Valve and accessory inspection, repairs, re‑valving, painting, marking and record keeping are all addressed.
• Rejection criteria - conditions and defect descriptions that render a cylinder unserviceable (Annex B).

Practical applications and who uses it

• Gas cylinder inspection stations and service centres ensuring safe return to service
• Gas producers, distributors and rental companies managing cylinder fleets
• Transport and logistics firms handling pressurized gas cylinders and bundles
• Safety managers, regulatory inspectors and certification bodies enforcing compliance
• Manufacturers and maintenance technicians developing inspection programs and quality records

Related standards and notes

• Identical to EN ISO 18119:2018; prepared by ISO/TC 58 and CEN/TC 23.
• Includes normative Annex B (defect descriptions) and informative Annex A (inspection periods).
• Does not cover acetylene or composite cylinders - consult separate standards for those types.

Keywords: SIST EN ISO 18119:2019, ISO 18119, gas cylinder inspection, periodic inspection and testing, seamless steel cylinders, aluminium‑alloy gas tubes, ultrasonic testing (UT), proof pressure test.