• BS EN 1634-1：2000 Fire resistance tests for door and shutter assemblies Part 1： Fire doors and shutters.PDF
• EN 14141-2004 Valves for natural gas transportation in pipelines - Performance requirements and tests .pdf
• BS EN 12266-2:2002 Industrial valves-Testing of valves-Part 2: Tests test procedures and acceptance criteria-Supplementary requirements.pdf