ISO 10691:2004

Overview

ISO 10691:2004 provides internationally recognized procedures for checking transportable refillable welded steel cylinders used for liquified petroleum gas (LPG) before, during, and after the filling process. Developed by the International Organization for Standardization (ISO), this standard focuses on maintaining safety, reliability, and regulatory compliance in LPG cylinder filling operations. It applies specifically to refillable welded steel LPG cylinders with a water capacity between 0.5 liters and 150 liters. The standard does not cover cylinders permanently installed in vehicles or equipment used for cylinder filling.

Key Topics

ISO 10691:2004 outlines critical areas of inspection and operational safety for gas cylinders:

• Segregation of Cylinders: Establishes procedures to separate cylinders into categories before filling, including suitable cylinders, those requiring periodic inspection, and those needing further assessment.
• Cylinders Suitable for Filling: Sets criteria for cylinder markings, inspection dates, physical condition, and leak checks.
• Cylinders for Periodic Inspection: Identifies cylinders that are out-of-date or have unclear markings, which must be set aside for further inspection in accordance with relevant standards.
• Assessment and Rejection: Provides guidelines for competent persons to assess cylinders for damages such as dents, corrosion, cracks, and other defects. Decision criteria for repair, reconditioning, or rejection are listed.
• Filling Procedures: Details safe filling operations, including correct LPG mixtures, avoidance of contamination, calibration of weighing equipment, and the use of appropriate filling methods (by mass, volume, or level).
• Post-Filling Checks: Requires thorough checks for correct filling mass, leak tests, and verification that valve caps or plugs are properly fitted.

Applications

This standard is essential for a wide range of stakeholders in the LPG industry, including:

• LPG Filling Facilities: Ensures safe and consistent procedures for checking and filling gas cylinders.
• Cylinder Manufacturers and Inspectors: Provides inspection and acceptance criteria for cylinder condition and safety.
• Regulatory Authorities: Offers clear procedures for compliance checks during cylinder filling operations.
• Transport and Distribution Companies: Ensures safe handling of LPG cylinders during transport and delivery.

By following ISO 10691:2004, organizations can significantly reduce the risk of cylinder failure, gas leaks, and potential hazards associated with LPG handling. Consistent application supports legal compliance, enhances workplace safety, and helps protect the end user.

Related Standards

For comprehensive conformity and best practices, ISO 10691:2004 should be used alongside other relevant international standards such as:

• ISO 10464 - Refillable welded steel cylinders for LPG - Periodic inspection and testing
• EN 1439 - Procedures for checking transportable refillable welded steel LPG cylinders before, during, and after filling

These related standards provide additional guidance on cylinder testing, periodic inspection, and in-depth operational procedures, supporting a robust safety system throughout the LPG supply chain.

Keywords: ISO 10691:2004, LPG cylinder filling, welded steel cylinders, gas cylinder inspection, LPG safety procedures, cylinder segregation, LPG industry standards, gas cylinder testing, cylinder rejection criteria, international standard for LPG.