Overview
EN ISO 23088:2020 - adopted by CEN as EN ISO 23088:2020 - specifies requirements for the periodic inspection and testing of welded steel transportable pressure drums with water capacities from 150 l up to 1 000 l and maximum test pressure up to 300 bar, intended for compressed and liquefied gases. The standard gives procedures, acceptance criteria and record-keeping requirements used to determine whether a pressure drum can be returned to service.
Key topics and technical requirements
The standard covers the full inspection and testing workflow and related controls, including:
- Inspection intervals and guidance on when periodic inspections and tests are required (see Annex A).
- Identification and preparation of pressure drums prior to inspection (markings, depressurization, devalving, flange removal).
- External and internal visual inspections - preparation, procedures and defect evaluation (see Annex B for conditions for rejection).
- Supplementary tests and non‑destructive examination methods to detect corrosion, cracks or other degradation.
- Inspection of openings, fittings and internal threads, including evaluation and remediation of damaged parts.
- Pressure testing procedures: proof tests with hydraulic or pneumatic options, test procedures and acceptance criteria.
- Repair controls for welds and other repairs, including requirements for who may carry out repairs and how repaired drums must be retested.
- Valve inspection, final operations (drying, cleaning, painting, re-fitting valves/flanges), tare verification, retest marking and record keeping.
- Rejection and rendering unserviceable criteria and administrative actions when a drum fails inspection.
Practical applications and users
EN ISO 23088:2020 is used to ensure the safe continued use of welded steel pressure drums in transportation and storage of gases. Typical users include:
- Gas cylinder manufacturers and remanufacturers
- Inspection and testing laboratories and certified inspectors
- Gas suppliers and distributors
- Transport operators and fleet maintenance teams
- Safety and regulatory authorities referencing UN Model Regulations
- Welding and repair workshops handling cylinder refurbishment
Applying the standard helps organizations maintain compliance, manage risk, extend service life where safe, and ensure safe transport of compressed and liquefied gases.
Related standards
EN ISO 23088 references normative documents relevant to gas cylinders and materials, for example:
Keywords: EN ISO 23088:2020, gas cylinders, periodic inspection, welded steel pressure drums, transportable pressure drums, pressure test, hydraulic test, pneumatic test.
