ISO 22621-6:2010
Plastics piping systems for the supply of gaseous fuels for maximum operating pressures up to and including 2 MPa (20 bar) — Polyamide (PA) — Part 6: Code of practice for design, handling and installation
ISO 22621-6:2010 specifies a code of practice dealing with polyamide (PA) piping systems, intended to be buried outside buildings and used for the supply of gaseous fuels.
It is applicable to mains and service lines, the components of which are prepared for jointing by scraping and/or machining, and gives instructions for the design, storage, handling, transportation, laying conditions and fusion quality control of PA pipes and fittings up to and including 250 mm outside diameter, as well as subsequent joint testing, backfilling, pipe system testing, commissioning and decommissioning.
The jointing methods covered by ISO 22621-6:2010 are butt fusion jointing and electrofusion jointing.
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Scope
Normative references
Terms and definitions
Symbols and abbreviated terms
Design
General
Materials, components and jointing equipment
Maximum operating pressure
Assembly techniques
Squeeze-off properties
Installation
Jointing procedure
Training
Heated-tool fusion jointing
General
Fusion temperature
Fusion equipment
Butt fusion
Principle
Butt fusion cycle
Butt fusion temperature
Butt fusion jointing
Electrofusion jointing
General
Temperature
Electrofusion equipment
Electrofusion
Preparation
Electrofusion operation
Cooling
Laying
General
Trench
Drag forces
Metal-body valves
Connection to existing systems
Backfilling
Pressure testing and commissioning
Storage, handling and transport
General
Storage
Handling
Transport
Quality control
General
Inspection prior to laying
Inspection during laying
Laying
Joint integrity
General
Visual inspection criteria
Butt fusion joints
Bead symmetry
Alignment
Bead width
Electrofusion socket joints
Pipe alignment
Scraping
Penetration
Molten material
Heating indicators
Cooling time
Position of electric wiring
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Scope
Normative references
Terms and definitions
Symbols and abbreviated terms
Design
General
Materials, components and jointing equipment
Maximum operating pressure
Assembly techniques
Squeeze-off properties
Installation
Jointing procedure
Training
Heated-tool fusion jointing
General
Fusion temperature
Fusion equipment
Butt fusion
Principle
Butt fusion cycle
Butt fusion temperature
Butt fusion jointing
Electrofusion jointing
General
Temperature
Electrofusion equipment
Electrofusion
Preparation
Electrofusion operation
Cooling
Laying
General
Trench
Drag forces
Metal-body valves
Connection to existing systems
Backfilling
Pressure testing and commissioning
Storage, handling and transport
General
Storage
Handling
Transport
Quality control
General
Inspection prior to laying
Inspection during laying
Laying
Joint integrity
General
Visual inspection criteria
Butt fusion joints
Bead symmetry
Alignment
Bead width
Electrofusion socket joints
Pipe alignment
Scraping
Penetration
Molten material
Heating indicators
Cooling time
Position of electric wiring