Overview
SIST EN ISO 15245-2:2002 is an international standard developed by CEN that focuses on the gauge inspection of parallel threads used for the connection of valves to gas cylinders. This standard complements Part 1 (Specification) by providing detailed guidelines on the types, dimensions, and correct use of inspection gauges to ensure the proper sealing and safety of gas cylinder valve connections. The standard applies to parallel threading systems specified in ISO 15245-1 and incorporates established gauging principles according to ISO 1502.
Key Topics
- Gauge Types and Dimensions: The standard specifies the design, dimensions, and tolerances of inspection gauges including GO and NOT GO plain plug gauges for various thread sizes (M18 x 1.5, M25 x 2, and M30 x 2).
- Inspection Procedures: Detailed instructions on using plug gauges to check the depth, diameter, and thread relief of the sealing recess are provided. Acceptance criteria are defined by the ability of the GO gauge to fit correctly and the NOT GO gauge to be rejected if the component dimensions fall outside the allowed tolerance.
- Material and Construction: Gauges must be manufactured from materials that offer suitable hardness, stability, and strength for reliable and repeatable inspections.
- Verification and Maintenance: Regular verification of inspection gauges using optical or suitable measuring equipment is necessary to prevent errors due to wear or damage over time.
- Identification and Traceability: Gauges must carry clear identification marks, including the ISO 15245 standard number, thread size indication, and gauge number for traceability and standard compliance.
Applications
SIST EN ISO 15245-2:2002 is essential for industries and manufacturers involved in the production, inspection, and maintenance of transportable gas cylinders with parallel threaded valve connections. By adhering to this standard, users can ensure:
- Safety: Reliable valve connections prevent gas leaks and ensure operational safety of gas cylinders across applications such as industrial gases, medical oxygen, and specialty gas distribution.
- Quality Control: The use of standardized inspection gauges facilitates consistent quality monitoring and acceptance or rejection of threaded components during manufacturing.
- Regulatory Compliance: Compliance with this standard supports meeting relevant safety directives and technical regulations in various jurisdictions across Europe and internationally.
- Interoperability: Standardized gauge dimensions allow for the interchangeability of gas cylinders and valves from different manufacturers, promoting global trade and equipment compatibility.
Related Standards
- ISO 15245-1:2001 – Gas cylinders - Parallel threads for connection of valves to gas cylinders - Part 1: Specification. This part covers the technical specifications for the parallel threading system.
- ISO 1502 – General-purpose metric screw threads - Gauges and gauging, describing GO and NOT GO gauge principles.
- ISO 68-1 – Metric screw threads - Basic profile - Part 1: Metric screw threads, which describes the thread profile and geometrical characteristics referenced in EN ISO 15245-2.
- ISO 724 – General-purpose metric screw threads - Basic dimensions, providing pitch and thread size specifications used in the standard.
By implementing SIST EN ISO 15245-2:2002, stakeholders involved with gas cylinders can maintain rigorous inspection protocols to assure the functionality and safety of parallel threaded valve connections, supporting effective quality control and compliance in the gas cylinder industry.
