scope:

This standard covers the installation and testing of gas meter installations.

These procedures apply to all new onshore gas supply meter installations intended to carry Natural Gas of flow rate >6 m³h^-1 and maximum operating pressure ≤38 bar. They address the fabrication, installation, testing and commissioning of meter installations. It details:

• Legal considerations such as Gas Safety (Installation and Use) Regulations and Pressure Systems Safety Regulations.
• General objectives and principles, including quality assurance and care of materials and equipment.
• Exchange of information between parties involved.
• Planning and preparation, including hazardous area classification.
• Site safety.
• Care of site environment.
• Civil engineering works where required.
• Pre-installation checks.
• Fabrication and welding of pipework and components.
• Assembly and installation, including electrical installation and cathodic protection.
• By-passes for equalization and testing.
• Strength testing and tightness testing.
• Pre-commissioning checks.
• Purging.
• Painting.
• Functional tests.
• Commissioning.
• Post-commissioning checks.
• Handover information and records.