ISO 7291:2010/Amd 1:2015

Overview

ISO 7291:2010/Amd 1:2015 is an important amendment to the international standard governing pressure regulators for manifold systems used in gas welding, cutting, and allied processes. This amendment updates the original third edition of ISO 7291:2010, which specifies requirements for pressure regulators designed to operate at pressures up to 30 MPa (300 bar). The amendment aligns the standard with the new gas letter codes introduced in ISO 10225, ensuring accurate marking and safety compliance.

Key Topics

• Scope and Application
  The standard applies specifically to pressure regulators installed in manifold systems for welding, cutting, and related allied processes. These regulators are designed for operation under high pressure-up to 30 MPa (300 bar)-ensuring the safe and efficient delivery of gases.

• Revision to Gas Marking Requirements
  A significant update in Amendment 1 is the revision of marking requirements:

  • The name of the gas intended for use must be clearly indicated on equipment.
  • When the gas name or chemical symbol cannot be fully marked, gas letter codes from ISO 10225 must be used to ensure standardized identification.

• Deleted Content
  The amendment removes Table 5 from the original document, reflecting updated approaches to equipment marking and classification in line with ISO 10225.

• Collaboration with ISO/IEC Standards
  The changes reflect close coordination between ISO technical committees and adherence to editorial rules outlined in ISO/IEC Directives. The standard also emphasizes alignment with international safety and trade principles.

Applications

• Gas Welding Equipment
  Pressure regulators compliant with ISO 7291:2010/Amd 1:2015 are critical components in gas welding setups, facilitating safe gas pressure control for various welding tasks.

• Cutting and Allied Processes
  In cutting operations such as oxy-fuel cutting, these regulators ensure stable and precise gas delivery, improving process efficiency and workplace safety.

• Manifold Gas Supply Systems
  The standard is particularly relevant for manifold systems, where multiple gas cylinders are connected and regulated. Proper compliance reduces risks associated with high-pressure gas handling.

• Industrial and Manufacturing Settings
  Industries utilizing welding and cutting extensively benefit from standards-compliant regulators to maintain operational safety and regulatory adherence.

Related Standards

• ISO 10225 - Gas Welding Equipment
  This amendment introduces mandatory referencing of ISO 10225 for marking gas welding equipment, specifically regarding gas letter codes for safe identification.

• ISO/IEC Directives, Part 1 & Part 2
  These directives govern the preparation, approval, and maintenance of ISO standards, ensuring consistent editorial quality and transparency.

• ISO/TC 44 (Welding and Allied Processes)
  The technical committee responsible for this standard focuses on equipment safety and performance standards in gas welding and allied applications.

Practical Value

Implementing ISO 7291:2010/Amd 1:2015-compliant pressure regulators ensures:

• Enhanced Safety through standardized pressure regulation and clear gas identification.
• Regulatory Compliance by adhering to internationally recognized marking and equipment performance criteria.
• Operational Efficiency with optimized gas flow control for welding and cutting processes.
• Risk Reduction in manifold systems by preventing misconnection or mix-up of gases due to standardized marking.

For manufacturers, suppliers, and end users of gas welding equipment, understanding and applying the requirements of ISO 7291 and its amendments is an essential part of maintaining safety and quality in high-pressure gas system operations.

Keywords: ISO 7291:2010/Amd 1:2015, gas welding equipment, pressure regulators, manifold systems, gas cutting, welding safety, ISO 10225 gas codes, high-pressure regulators, gas equipment marking, welding standards, industrial gas safety