1. BS EN 1555-1:2010 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 1: General

2. BS EN 1555-2:2010 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 2: Pipes

3. BS EN 1555-3:2010+A1:2012 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings

4. BS EN 1555-4:2011 Plastics piping systems for the supply of gaseous fuels -Polyethylene (PE) - Part 4: Valves

5. BS EN 1555-5:2010 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5: Fitness for purpose of the system

6. BS EN 1557:1997 Surface active agents - Colorimetric characterization of optically clear coloured liquids (products) as X, Y, Z tristimulus values in transmission

7. BS EN 1559-1:2011 Founding - Technical conditions of delivery - Part 1: General

8. BS EN 1559-2:2014 Founding - Technical conditions of delivery - Part 2: Additional requirements for steel castings

9. BS EN 1559-3:2011 Founding - Technical conditions of delivery - Part 3: Additional requirements for iron castings

10. BS EN 1559-4:2015 Founding - Technical conditions of delivery - Part 4: Additional requirements for aluminium alloy castings