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

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

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

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

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

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

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

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

9. BS EN 1559-5:1998 Founding - Technical conditions of delivery - Part 5: Additional requirements for magnesium alloy castings

10. BS EN 1559-6:1999 Founding - Technical conditions of delivery - Part 6: Additional requirements for zinc alloy casting