95/700260 DC : DRAFT JAN 1995
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
PREN 1268-1 - SAFETY DEVICES FOR THE PROTECTION AGAINST EXCESSIVE PRESSURE - PART 1: SAFETY VALVES
23-07-2013
23-11-2012
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
Committee |
PVE/12
|
DocumentType |
Draft
|
PublisherName |
British Standards Institution
|
Status |
Withdrawn
|
Standards | Relationship |
PREN 1268-1 : DRAFT 1994 | Identical |
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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