EN 331:2015 pdf download.MANUALLY OPERATED BALL VALVES AND CLOSED BOTTOM TAPER PLUG VALVES FOR GAS INSTALLATIONS FOR BUILDINGS.
EN 331 specifies the characteristics for the construction, performance and safety of ball valves and closed bottom taper plug valves. It also details the test methods and marking provisions.
EN 331 applies to metallic valves not directly buried for domestic and commercial installations inside or outside of buildings.
NOTE “Not directly buried” within the context of this standard means that valves below ground are not in direct contact with earth or other materials e.g. that they are in a protected encasement.
1.2 Valve nominal sizes (DN) covered by this European Standard are as follows: 6, 8, 10, 12, 15, 20, 25,32, 40, 50, 65, 80, 100.
EN 377, Lubricants for applications in appliances and associated controls using combustible gases except
those designed for use in industrial processes
EN 437:2003 +A1 :2009, Test gases – Test pressures – Appliance categories
EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 682, Elastomeric Seals – Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluids
EN 75 1-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water – Part 1: Anaerobic jointing compounds
EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water – Part 2: Non-hardening jointing compounds
EN 75 1-3, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water – Part 3: Unsintered PTFE tapes
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steelficinges
EN 1503-1, Valves — Materials for bodies, bonnets and covers — Part 1: Steels specified in European Standards
EN 1503-3, Valves — Materials for bodies, bonnets and covers — Part 3: Cast irons specijIed in European Standards
EN 1555-3, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 3: Fittings
EN 1593:1999, Non-destructive testing – Leak testing – Bubble emission techniques
EN 1982 Copper and copper alloys – Ingots and castings
EN 10226 (all parts), Pipe threads where pressure tight joints are made on the threads
EN 10255, Non-Alloy steel tubes suitable for welding and threading — Technical delivery conditions
EN 12163 Copper and copper alloys – Rod for general purposes
EN 12164 Copper and copper alloys – Rod for free machining purposes
EN 12165 Copper and copper alloys – Wrought and unwrought forging stock
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
standard reference conditions
conditions to which all measured values are corrected (temperature 15 °C; pressure 1013,25 x 102 Pa absolute; dry air)
3.2
shut off valve
device which admits or closes the gas flow by movement of the closure member. A valve is manually operated if operation can be performed by the user
3.3
components
3.3.1
obturator
movable part of the valve which shuts off the gas flow.EN 331 pdf download free.
EN 331:2015 pdf download
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