What is BS EN 969 - Requirements and test methods for gas pipelines about?  
BS EN 969 is a European Standard that covers ductile iron pipes. BS EN 969 is a set of guidelines with requirements and test methods for ductile iron pipes, fittings, accessories and their joints for gas pipelines.
BS EN 969 specifies the requirements and associated test methods applicable to ductile iron pipes, fittings, accessories and their joints used for the construction of pipelines outside buildings:
- To conveys air or combustible gases (e.g. natural gas or town gas) at pressures up to 16 bar
- To be installed below or above ground
BS EN 969 standard covers pipes, fittings and accessories cast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints, in a size range extending from DN 40 to DN 600 inclusive.
BS EN 969 specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings of ductile iron pipes and fittings. It also gives performance requirements for all components including joints.
BS EN 969 applies to pipes, fittings and accessories which are:
- Manufactured with socketed, flanged or spigot ends
- Normally delivered externally and internally coated
- Suitable for gas temperatures between − 15 °C and 50 °C
Note 1: A combustible gas is a gas or any fuel that is in gaseous state at a temperature of 15 °C at a pressure of 1 bar.
Note 2: In BS EN 969, all pressures are relative pressures expressed in bars.
Who is BS EN 969 - Requirements and test methods for gas pipelines for? 
BS EN 969 on requirements and test methods for gas pipelines is useful for:
- Suppliers of pipes
- Technicians and engineers
- Industry consultants
- Maintenance services
- Pipe manufacturers
- Accessories, pipe fitting manufacturers
Why should you use BS EN 969 - Requirements and test methods for gas pipelines?  
Joint provide strength to the pipelines, as they have a tendency to bend. Joints must be fitted together tightly to avoid any leakage. Improved connectivity and leak-proof operations ensure safety of gas pipelines.
BS EN 969 provides users guidance on technical requirements, including dimensional requirements, material characteristics, coatings and linings for pipes, coatings for fittings and accessories, marking of pipes and fittings and leak tightness, ensuring stable operability and performance in gas pipelines.
BS EN 969 also provides users guidance on performance requirements for joints, including flexible joints, retrained flexible joints, flanged joints as cast, screwed, welded and adjustable, ensuring improved connectivity and leakproof operations.
Adoption of BS EN 969 guidelines is beneficial for the users of gas pipelines to ensure zero leakage, stable operability and operational safety in gas pipeline applications.
What’s changed since the last update?
BS EN 969:2009 supersedes EN 969:1995. BS EN 969:2009 includes some editorial changes with respect to EN 969:1995.
