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PREN 1268-1 : DRAFT 1994

Current

Current

The latest, up-to-date edition.

SAFETY DEVICES FOR THE PROTECTION AGAINST EXCESSIVE PRESSURE - PART 1: SAFETY VALVES

Published date

12-01-2013

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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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