BS EN 13445-3:2014+A3:2017 specifies requirements for the design of unfired pressure vessels covered by EN 13445-1:2014 and constructed of steels in accordance with EN 13445-2:2014. EN 13445-5:2014, Annex C specifies requirements for the design of access and inspection openings, closing mechanisms and special locking elements. Cross References: EN 1991-1-6 EN 1990 EN ISO 15613:2004 EN 1591-1:2011 EN 286-2:1992 EN 13445-4:2014 EN 837-1:1996 EN 1992-1-1:2004 EN -2:2014 EN 1092-1:2007 ISO 4014:2011 Ed 4 ISO 4016:2011 Ed 4 EN 1991-1-4:2005 ISO 261:1998 EN 1998-1:2004 EN 764-3:2002 EN ISO 4014 ( ISO 4014:2011) AS EN 13445-5:2014 EN ISO 4016 (ISO 4016:2011) AS EN 10222-1:1998 EN 13445-8:2014 EN 13445-1:2014 EN 1708-1:2010 EN 764-2 :2012 EN 764-1:2004 EN 10222-1:1998/A1:2002 EN 837-3:1996 Incorporates the following: Amendment, December 2017; Corrigendum, September 2016; Amendment, August 2015