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prEN 12110-2
Tunnel boring machines - Air locks - Part 2: Safety requirements for the use of non-air breathing mixtures and saturation techniques in personnel locks and for pressurised transfer shuttles
prEN 12186 rev
Gas infrastructure - Gas pressure regulating stations for transmission and distribution - Functional requirements
prEN 12255-15 rev
Wastewater treatment plants - Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants
prEN 12266-1 rev
Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements
prEN 12309-2
Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 2: Safety
prEN 12310-1
Flexible sheets for waterproofing - Part 1: Bitumen sheets for roof waterproofing - Determination of resistance to tearing (nail shank)
prEN 12312-20 rev
Aircraft ground support equipment - Specific requirements - Part 20: Electrical ground power units
prEN 12369-2
Wood-based panels - Characteristic values for structural design - Part 2: Plywood
prEN 12385-2 rev
Steel wire ropes - Safety - Part 2: Definitions, designation and classification
prEN 12385-4 rev
Steel wire ropes - Safety - Part 4: Stranded ropes for general lifting applications
