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[en] The guide presents requirements for the pipework of nuclear facilities in Finland. According to the section 117 of the Finnish Nuclear Energy Degree (161/88), the Radiation and Nuclear Safety Authority of Finland (STUK) controls the pressure vessels of nuclear facilities in accordance with the Nuclear Energy Act (990/87) and, to the extent applicable in accordance with the Act of Pressure Vessels (98/73) and the rules and regulations issued by the virtue of these. In addition STUK is an inspecting authority of pressure vessels of nuclear facilities in accordance with the Pressure Vessel Degree (549/1973). According to the section of the Pressure Vessel Degree, a pressure vessel is a steam boiler, pressure container, pipework of other such appliance in which the pressure is above or may come to exceed the atmospheric pressure. Guide YVL 3.0 describes in general terms how STUK controls pressure vessels. STUK controls Safety Class 1, 2 and 3 piping as well as Class EYT (non-nuclear) and their support structures in accordance with this guide and applies the provisions of the Decision of the Ministry of Trade and Industry on piping (71/1975) issued by virtue of the Pressure Vessel Decree
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2000; 13 p; ISBN 951-712-372-8; 
; Translation. 2 refs. The original text in Finnish is published under the same report number. The guide is valid from 1 February 1997 and will remain in force until further notice. It replaces the guide YVL Guide 3.3 issued on 21 May 1984
; Translation. 2 refs. The original text in Finnish is published under the same report number. The guide is valid from 1 February 1997 and will remain in force until further notice. It replaces the guide YVL Guide 3.3 issued on 21 May 1984