BS EN 14025:2018 pdf download

BS EN 14025:2018 pdf download.Tanks for the transport of dangerous goods – Metallic pressure tanks – Design and construction
1 Scope
This document specifies the minimum requirements for the design and construction of metallic pressure tanks having a maximum working pressure exceeding 50 kPa [0,5 bar), for the transport of dangerous goods by road and rail and sea. This document includes requirements for openings, closures and structural equipment; it does not cover requirements of service equipment. For tanks for the transport of cryogenic liquids, EN 13530-1 and EN 13530-2 apply. Design and construction of pressure tanks according to the Scope of this document are primarily subject to the requirements of RID/ADR, Subsections 6.8.2.1, 6.8.3.1 and 6.8.5, as relevant. In addition, the relevant requirements of RID/ADR，Table A, columns12 and 13, to Chapters 3.2，4.3 and Subsection 6.8.2.4 apply. For the structural equipment RID/ADR, Subsections 6.8.2.2 and 6.8.3.2 apply, as relevant. The definitions of RID/ADR, Subsection 1.2.1, are referred to. For portable tanks see also RID/ADR, Chapter 4.2 and Sections 6.7.2 and 6.7.2. In addition, the relevant requirements of RID/ADR, Table A, Columns10 and 11 to Chapters 3.2, 4.2, and Sections 6.7.2 and 6.7.3 apply. The paragraph numbers above relate to the 2017 issue of RID/ADR which are subject to regular revisions. This can lead to temporary non-compliances with EN 14025. This document is applicable to liquefied gases including LPG; however for a dedicated LPG standard see EN 12493.
6.3.5.2 Nozzle reinforcement
6.3.5.2.1 The design method specified below only applies to cylindrical shells, and dished ends having circular or elliptical openings, where the assumptions and conditions specified in 6.3.5.1 are satisfied.
6.3.5.2.2 Shells with openings shall be reinforced where necessary. The reinforcement of the main
body can be obtained by:
a) set-in or set-on pads;
b) set-in or set-on branches; or
c) combinations thereof.
6.3.5.2.3 The reinforcement area of the main body with openings cannot be calculated directly but shall be assumed in the first instance. This assumption may be verified by means of the following method. The applied method is based on thicknesses derived from formulae in 6.3.2 for cylindrical shells and from formulae in 6.3.3 for dished ends and leads to relationships between a pressure loaded area Ap and a stress loaded cross sectional area which is the sum of Afm, Afp and Afb (see Figure 8). The calculation may need to be repeated using a corrected assumption of the reinforcement area.
6.3.5.2.4 Where necessary, sufficient reinforcement shall be provided in all planes through the axis of the opening branch.
6.3.5.2.5 Set-in or set-on fillet welded branches shall only be considered in the calculation if the ratio of the diameter is di/De≤1/3 and the ratio of the wall thickness eb/ em is less than 0,7. Each fillet weld shall have a throat thickness not less than 0,7 times the thinner wall thickness.