New European Standards Governing the Design of LNG Storage Systems & Equipment
Publication Date: 2012-May-07
The IP.com Prior Art Database
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NEW EUROPEAN STANDARDS GOVERNING THE DESIGN OF LNG STORAGE SYSTEMS
This paper describes the activities of various working groups charged with the development of new European Standards for LNG installations under the auspices of the CEN TechcalCommittee TC 282.
Particular attention is drawn to the specific implications of the comprehensive standard prEN 1473 which allows a risk assessment approach to be used in the design and layout of LNG facilities. A comparison is made with the existing LNG standards NFPA 59A and 49 CFR 193 which are somewhat more prescriptive.
It is concluded that if the phlosophies incorporated within prEN 1473 are adopted by the industry considerable savings in the total installed cost of LNG facilities will be possible.
Furthermore it is pointed out that the selection of the lowest cost type of of LNG storage tank will not necessarily result in a saving in the total installed cost of the facility if an equivalent level of risk is to be maintained.
OVERVIEW OFTHE STANDARDS HISTORY AND BACKGROUND
OBJECTIVES OF THE NEW EUROPEAN STANDARDS
STRUCTURE OF THE WORKING GROUPS (WGs) ANDWORK ITEMS (wls)
STATUS OF STANDARDS SCOPE OF EACH STANDARD LNG TANKAGE
SPEClFIC IMPLICATIONS OF STANDARDprEN 1473
RISK ASSESSMENT FOR STORAGE TANKS EMERGENCY SHUTDOWN AND ISOLATION THERMAL INSULATION
COMPARISON WITH NFPA 59A AND 49 CFR 193
Appendix I Tables of allowable thermal radiation flux Appendix I1 Types of LNG Storage Tanks
Appendix 111 Comparison with NFPA 591A & 49 CFR 193
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OVERVIEW OF THE STANDARDS
HISTORY AND BACKGROUND
The Companies involved in the natural gas industry, under the auspices of AFNOR (the French Standards Institutions), proposed in 1990to extend the European gas standardisation process to LNG installations.
The proposal was to cover the European LNG business in general because few regulations exist in Europe even though there is more than twenty years operating experience in LNG manufacture and trading. It was also meant to provide recogmsed standards for the hture and to provide guidance for new LNG developments.
As a result, the "Comiti Europeen deNokalisation" (CEN) formed a Techcal Committee (TC), CEN/TC 282 in 1991 to oversee the preparation of the standards required for 'installation and equipment for liquefied natural gas'. The Technical Committee is made up of representatives from companies connected with the LNG business in Europe and includes the main gas companies, engineering contractors and equipment manufacturers.
The Committee decided to produce eight standards covering the main aspects of the LNG business with the exception of the LNG carriers.
These standards include reference to safety and risk assessment in plant design, whch is required by European legislationand is now being used by the major contractors. It also takes into account the potential ha...