BS EN ISO 4126-3:2006

Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Design of combination
6 Installation of combination
7 Combination performance
8 Determination of combination discharge capacity
   factor, F[d], by testing
9 Derivation of combination discharge capacity factor,
   F[d]
10 Alternative to testing for F[d]
11 Certification of combination discharge capacity
   factor, F[d]
12 Application and use of the certified combination
   discharge capacity factor, F[d]
13 Marking and identification of combination devices
14 Certification
15 Preparation for storage and transport
Annex ZA (informative) - Relationship between this
         International Standard and the Essential
         Requirements of EU Directive 97/23/EC (PED)

Describes the requirements for a product assembled from the in-series combination of safety valves or CSPRS (controlled safety pressure relief systems) according to ISO 4126-1, ISO 4126-4 and ISO 4126-5, and bursting disc safety devices according to ISO 4126-2 installed within no more than five pipe diameters from the valve inlet.