PREN 1268-1 : DRAFT 1994
Current
The latest, up-to-date edition.
SAFETY DEVICES FOR THE PROTECTION AGAINST EXCESSIVE PRESSURE - PART 1: SAFETY VALVES
12-01-2013
1 Scope
2 Normative references
3 Definitions
3.1 Safety valve
3.2 Pressure
3.3 Lift
3.4 Flow area
3.5 Flow diameter
3.6 Discharge capacity
3.7 Notified body
3.8 Inspection authority
3.9 Nominal size
4 Design, materials and construction
4.1 General
4.2 End connections
4.3 Materials
5 Integrity testing in the factory
5.1 Purpose
5.2 General
5.3 Hydraulic test
5.4 Pneumatic testing
5.5 Adjustment of cold differential test pressure
5.6 Seat leakage test
6 Operating and flow characteristic tests
6.1 General
6.2 Operating characteristics
6.3 Flow characteristics
6.4 Determination of coefficient of discharge
6.5 Certification of valves
7 Determination of safety valve performance
7.1 Determination of coefficient of discharge K[d]
7.2 Critical and subcritical flow
7.3 Discharge capacity at critical flow
7.4 Discharge capacity for any gas at subcritical flow
7.5 Discharge capacity for liquid
8 Sizing of safety valves
8.1 Valves for gas and vapour
8.2 Calculation of capacity
9 Marking and sealing
9.1 Marking on the body of a safety valve
9.2 Marking on an identification plate
9.3 Sealing of a safety valve
Specifies general requirements for safety valves irrespective of the fluid for which they are designed.
Committee |
TC 69
|
DocumentType |
Draft
|
PublisherName |
Comite Europeen de Normalisation
|
Status |
Current
|
Standards | Relationship |
95/700260 DC : DRAFT JAN 1995 | Identical |
NEN EN 1268-1 : DRAFT 1995 | Identical |
99/541173 DC : DRAFT OCT 1999 | BS EN 13731 - SPECIFICATION FOR LIFTING BAGS FOR FIRE AND RESCUE SERVICE USE |
DIN EN 12952-9:2003-04 | Water-tube boilers and auxiliary installations - Part 9: Requirements for firing systems for pulverized solid fuels for the boiler |
EN 12952-16:2002 | Water-tube boilers and auxiliary installations - Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler |
EN 12952-9:2002 | Water-tube boilers and auxiliary installations - Part 9: Requirements for firing systems for pulverized solid fuels for the boiler |
I.S. EN 12952-9:2002 | WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 9: REQUIREMENTS FOR FIRING SYSTEMS FOR PULVERIZED SOLID FUELS FOR THE BOILER |
I.S. EN 12952-16:2002 | WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 16: REQUIREMENTS FOR GRATE AND FLUIDIZED-BED FIRING SYSTEMS FOR SOLID FUELS FOR THE BOILER |
BS EN 12952-16:2002 | Water-tube boilers and auxiliary installations Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler |
DIN EN 12952-16:2003-04 | Water-tube boilers and auxiliary installations - Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels for the boiler |
BS EN 737-3:2000 | Medical gas pipeline systems Pipelines for compressed medical gases and vacuum |
BS EN 12952-9:2002 | Water-tube boilers and auxiliary installations Requirements for firing systems for pulverized solid fuels for the boiler |
DIN EN 12952-10:2002-12 | Water-tube boilers and auxiliary installations - Part 10: Requirements for safeguards against excessive pressure |
BS EN 12952-10:2002 | Water-tube boilers and auxiliary installations Requirements for safeguards against excessive pressure |
EN 12952-10:2002 | Water-tube boilers and auxiliary installations - Part 10: Requirements for safeguards against excessive pressure |
ISO 1083:2004 | Spheroidal graphite cast irons - Classification |
ISO 5922:2005 | Malleable cast iron |
PREN 1092-1 : DRAFT 2016 | FLANGES AND THEIR JOINTS - CIRCULAR FLANGES FOR PIPES, VALVES, FITTINGS AND ACCESSORIES, PN DESIGNATED - PART 1: STEEL FLANGES |
ISO 7-1:1994 | Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation |
ISO 185:2005 | Grey cast irons Classification |
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