BS EN 12285-1:2018:2019 Edition
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Workshop fabricated steel tanks – Horizontal cylindrical single skin and double skin tanks for the underground storage of flammable and nonflammable water polluting liquids other than for heating and cooling of buildings
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 122 |
This document specifies the product characteristics and test methods for workshop fabricated cylindrical, horizontal steel tanks, single (type S) and double skin (type D) intended to be used for the underground storage of water polluting liquids (both flammable and non-flammable) and installed in industrial processes or in petrol stations at normal ambient temperature conditions (−20 °C to +50 °C) within the following limits:
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from 800 mm up to 3 000 mm nominal diameter and;
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up to a maximum overall length of 6 times the nominal diameter;
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with an operating pressure (Po) of maximum 50 kPa (0,5 bar(g)) and minimum – 5 kPa (–50 mbar(g)) and;
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for double skin tanks with a vacuum leak detection system where the kinematic viscosity does not exceed 5 × 10−3 m2/s.
Tanks designed to this standard allow for an earth cover of up to 1,5 m. If there are imposed traffic loads or a greater earth cover, calculation is expected to be carried out.
This document is not applicable to tanks used for storage and/or supply of fuel/gas for building heating/cooling systems, and of hot or cold water not intended for human consumption, nor to loads and special measures necessary in areas subject to risk of earthquakes.
Guidance on installation of tanks is presented in Annex A, which does not include special measures that might be necessary in areas subject to flooding.
This document is not applicable for the storage of liquids having dangerous goods classes listed in Table 1 because of the special dangers involved.
Table 1 — List of dangerous goods which are not covered by this standard
NOTE The classifications referred to are those adopted by the United Nations Committee of Experts on the Transport of Dangerous Goods (not to be interpreted as tank classes described in 6.2).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 7 | 1 Scope |
| 8 | 2 Normative references 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions |
| 10 | 3.2 Symbols and abbreviations |
| 11 | 4 Product characteristics 4.1 General 4.2 Welding 4.2.1 Types of joints |
| 14 | 4.2.2 Shell plate arrangement 4.2.3 Consumables 4.2.4 Interstitial space 4.3 Load bearing capacity 4.4 Additional requirements 4.4.1 Manways and inspection covers |
| 15 | 4.4.2 Structural bolts 4.4.3 Tank fittings, pipes and nozzles |
| 16 | 4.4.4 Lifting lugs |
| 17 | 4.5 Mechanical resistance and stability 4.5.1 Materials for shell, dished ends and manways 4.5.2 Wall thickness 4.5.2.1 Nominal wall thicknesses |
| 18 | 4.5.2.2 Dished ends |
| 19 | 4.5.3 Stiffening resistance |
| 20 | 4.5.4 Design of Stiffening Rings |
| 21 | 4.6 Internal pressure 4.7 Tightness (gas and liquid) 4.8 Release of dangerous substances 4.9 Durability |
| 22 | 4.10 Crushing resistance 5 Testing and sampling methods 5.1 Mechanical resistance and stability 5.1.1 Materials for shell, dished ends and manways 5.1.2 Wall thickness 5.1.3 Welding 5.1.4 Stiffening resistance 5.2 Load-bearing capacity |
| 23 | 5.3 Tightness test (gas or liquid) 5.4 Crushing resistance 5.5 Testing of additional requirements 5.5.1 Manways and inspection covers 5.5.2 Structural bolts 5.5.3 Tank fittings, pipes and nozzles 5.5.4 Lifting lugs |
| 24 | 5.6 Durability 6 Classification 6.1 Tank type 6.2 Tank classes 6.3 Designation and purchaser’s specification |
| 25 | 7 Marking and labelling 7.1 Marking of the tank 7.2 Documentation 8 Environmental aspects |
| 26 | Annex A (informative)Transport, storage and installation procedure A.1 Transport A.2 Storage A.3 Installation procedure A.3.1 Planning A.3.2 Ground works |
| 27 | A.3.3 Backfill materials A.3.3.1 General A.3.3.2 Sand A.3.3.3 Gravel A.3.3.4 Stone crushings A.3.3.5 Concrete A.3.4 Installing backfill |
| 28 | A.3.5 Access chamber |
| 29 | Annex B (informative)Evaluation of liquid-material-combinations for storage tanks according to this standard B.1 General B.2 Criteria for evaluation B.2.1 Conditions for resistance B.2.1.1 Design for tanks |
| 30 | B.2.1.2 Purity of liquids B.2.1.3 Gaskets B.2.1.4 Conditions |
| 31 | B.2.2 Criteria for the suitability evaluation of liquid-material-combinations B.3 Evaluation of liquids not mentioned in the positive-liquid-list B.4 Use of the positive-liquid-list B.4.1 Classification of the tanks according to their working conditions B.4.1.1 Pressureless tanks B.4.1.2 Tanks with internal working pressure (less than 50 kPa (0,5 bar)) |
| 32 | B.4.2 Conditions for the use of the liquids B.4.2.1 Conditions related to liquids B.4.2.2 Conditions related to working conditions |
| 33 | B.4.2.3 Explanation of the abbreviations in the positive-liquid-list |
| 116 | Annex C (informative)Environmental aspects |
| 119 | Annex D (informative)A-deviations |
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BS EN 12285-1:2018
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