SIST EN 12285-2:2005
(Main)Workshop fabricated steel tanks - Part 2: Horizontal cylindrical single skin and double skin tanks for the aboveground storage of flammable and non-flammable water polluting liquids
Workshop fabricated steel tanks - Part 2: Horizontal cylindrical single skin and double skin tanks for the aboveground storage of flammable and non-flammable water polluting liquids
This document specifies the requirements for metallic shop fabricated cylindrical, horizontal steel tanks, single and double skin for the aboveground storage of water polluting liquids (both flammable and non-flammable) within the following limits:
- from 800 mm up to 3 000 mm nominal diameter and,
- up to a maximum overall length of 6 times the nominal diameter and,
- for liquids with a maximum density of up to 1,9 kg/l and,
- with an operating pressure (Po) of maximum 1,5 bar (abs.) and,
- where double skin tanks with a vacuum leak detection system are used the cinematic viscosity of the stored media shall not exceed 5 ´ 10-3 m2/s.
This document is applicable for normal ambient temperature conditions (- 20 °C to + 50 °C). Where temperatures are outside this range, additional requirements need to be taken into account.
This document is not applicable for the storage of liquids having dangerous good classes listed in Table 1 because of the special dangers involved.
Table 1 - List of dangerous goods the storage of which are not covered by this document
UN-classification Storage media
Class 1 Explosives
Class 4.2 Substances liable to spontaneous combustion
Class 4.3 Substances which in contact with water emit flammable gases
Class 5.2 Organic peroxides
Class 6.2 Infectious substances
Class 7 Radioactive material, hydrocyanic or hydrocyanic solvent liquids, metalcarbonyls, hydrofluoracid, bromide liquids
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 3.1.4).
This document does not cover the installation of tanks which might be subject to local regulations involving pollution control.
Werksgefertigte Tanks aus Stahl - Teil 2: Liegende zylindrische ein- und doppelwandige Tanks zur oberirdischen Lagerung von brennbaren und nichtbrennbaren wassergefährdenden Flüssigkeiten
Dieses Dokument enthält Anforderungen an werksgefertigte zylindrische, liegende, ein- und doppelwandige Stahltanks zur oberirdischen Lagerung von (brennbaren und nichtbrennbaren) wassergefährdenden Flüssigkeiten mit folgenden Anwendungsgrenzen:
- Nenndurchmesser von 800 mm bis 3 000 mm und
- maximale Gesamtlänge bis zum 6fachen des Nenndurchmessers und
- für Flüssigkeiten mit einer maximalen Dichte von 1,9 kg/l und
- mit einem Betriebsdruck (Po) von maximal 1,5 bar (abs.) und
- bei Verwendung von doppelwandigen Tanks mit einem Vakuum-Leckanzeigesystem darf die kinematische Viskosität des Lagermediums 5 ´ 10-3 m2/s nicht übersteigen.
Dieses Dokument gilt bei üblichen Ungebungstemperaturen (-20 °C bis +50 °C). Für Temperaturen außerhalb dieses Bereichs müssen zusätzliche Anforderungen berücksichtigt werden.
Dieses Dokument gilt nicht für die Lagerung von Flüssigkeiten der in Tabelle 1 aufgeführten Gefahrgutklassen wegen der von ihnen ausgehenden besonderen Gefahr.
Réservoirs en aciers fabriqués en atelier - Partie 2: Réservoirs horizontaux a simple et double paroi pour le stockage aérien des liquides inflammables et non inflammables polluant l'eau
Le présent document spécifie les exigences applicables aux réservoirs en aciers, cylindriques, horizontaux,
fabriqués en atelier, à simple et double paroi, pour le stockage aérien de liquides polluant l'eau (inflammables et
non inflammables), et compris dans les limites suivantes :
.diamètre nominal compris entre 800 mm et 3 000 mm ;
.longueur maximale d'encombrement égale à 6 fois le diamètre nominal ;
.pour les liquides présentant une masse volumique maximale égale à 1,9 kg/l ;
.avec une pression de service (p o ) maximale de 1,5 bar (absolue) ; et
.lorsque des réservoirs à double paroi, munis d'un système de détection de fuites du vide, sont utilisés, la
viscosité des liquides stockés ne doit pas être supérieure à 5 × 10 -3 m 2 /s.
Le présent document s'applique dans des conditions normales de température ambiante (-20 °C à + 50 °C).
Lorsque des températures sont en dehors de cette plage, il convient que des exigences complémentaires soient
considérées.
Ce document ne s'applique pas au stockage de liquides appartenant aux classes de matières dangereuses
énumérées au Tableau 1, en raison des dangers spécifiques engendrés.
Jekleni rezervoarji, izdelani v delavnici – 2. del: Vodoravni valjasti enoplaščni in dvoplaščni rezervoarji nadzemne izvedbe za gorljive in negorljive tekočine, ki onesnažujejo vodo
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Workshop fabricated steel tanks - Part 2: Horizontal cylindrical single skin and double skin tanks for the aboveground storage of flammable and non-flammable water polluting liquidsRéservoirs en aciers fabriqués en atelier - Partie 2: Réservoirs horizontaux a simple et double paroi pour le stockage aérien des liquides inflammables et non inflammables polluant l'eauWerksgefertigte Tanks aus Stahl - Teil 2: Liegende zylindrische ein- und doppelwandige Tanks zur oberirdischen Lagerung von brennbaren und nichtbrennbaren wassergefährdenden Flüssigkeiten23.020.10UH]HUYRDUMLStationary containers and tanks13.300Varstvo pred nevarnimi izdelkiProtection against dangerous goodsICS:SIST EN 12285-2:2005enTa slovenski standard je istoveten z:EN 12285-2:200501-maj-2005SIST EN 12285-2:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12285-2February 2005ICS 23.020.10English versionWorkshop fabricated steel tanks - Part 2: Horizontal cylindricalsingle skin and double skin tanks for the aboveground storage offlammable and non-flammable water polluting liquidsRéservoirs en aciers fabriqués en atelier - Partie 2:Réservoirs horizontaux à simple et double paroi pour lestockage aérien des liquides inflammables et noninflammables polluant l'eauWerksgefertigte Tanks aus Stahl - Teil 2: Liegendezylindrische ein- und doppelwandige Tanks zuroberirdischen Lagerung von brennbaren undnichtbrennbaren wassergefährdenden FlüssigkeitenThis European Standard was approved by CEN on 17 December 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12285-2:2005: E
Clauses of this European Standard addressing the provisions of the
EU Construction Products Directive.26 ZA.1 Scope and relevant characteristics.26 ZA.2 Procedure(s) for the attestation of conformity of steel tanks.27 ZA.3 CE marking and labelling.29 Bibliography.32
Tables Table 1 — List of dangerous goods the storage of which are not covered by this document.6 Table 2 — Tank classes.8 Table 3 — Nominal wall thickness for inner and outer skin tanks, dished ends and compartment dished end.13 Table 4 — Dimensions of manhole components.15 Table 5 — Dimensions of welded saddles.17 Table 6 — Dimensions of saddle components.17 Table 7 — Loose saddles.17 Table 8 — Types of welded joints.19 Table 9 — Test pressure Pt1 and Pt2.21 Table 10 — Number of units and compliance criteria for initial and further testing.22 Table 11 — Minimum frequency of testing for product testing and evaluation as part of FPC.23 Table ZA.1 — Relevant clauses.27 Table ZA.2 — Attestation of conformity systems.27 Table ZA.3a — Assignment of evaluation of conformity tasks (for system 3).28 Table ZA.3b — Assignment of evaluation of conformity tasks (for system 4).28
1) Directive 89/106/EEC of the European Parliament and the Council of 21 December 1988 on the approximation of the laws of the Member States concerning Construction products (OJEC L 40).
and equipment for storage tanks and for service stations
SC 1 Tanks Underground tanks (EN 12285-1) Aboveground tanks (EN 12285-2)
SC 2 Equipment Leak detection systems (EN 13160-1 to -7) Overfill prevention devices (EN 13616) Tank contents gauges (EN 13352) Petrol filling stations (EN 13617-1 to -4, EN 13012, EN 14125)
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 3.1.4). This document does not cover the installation of tanks which might be subject to local regulations involving pollution control.
3.1.5 explosion pressure shockproof tank tank which is designed to withstand an internal explosion without leakage; permanent deformations are permissible. Where the atmospheric pressure is 1 bar the maximum explosion pressure is measured at 10 bar (abs.) 3.1.6 tank type for the purpose of this document two tank types are distinguished: Type S: Single skin Type D: Double skin 3.1.7 operating pressure (Po) pressure inside the tank above the liquid during operating conditions 3.1.8 test pressure (Pt1) pressure to which the tank or compartment is subjected for testing 3.1.9 interstitial test pressure (Pt2) pressure to which the interstitial space between the skins is subjected for testing. It is only applicable for double skin tanks 3.1.10 nominal volume storage capacity for which the tank is sold 3.1.11 actual volume total internal capacity of the tank which is equal to or greater than the nominal volume NOTE The safe working capacity of the tank should normally not exceed 95 % of the nominal volume for mineral oil products. For other liquids the safe working capacity conforms to Equation (1). δ351100+=f
(1) where
f is the percentage of nominal volume (%);
δ is the thermal expansion coefficient of the liquid (K).
External nominal diameter of the tank d2
Inside diameter of the manhole d3
Diameter of the manhole cover e1 Distance between centre of the saddle and the end of the cylindrical part of the tank h1 Length
of the straight flange of the dished end k1 Length of the saddle base kp Pitch circle diameter of manway bolts lc Length of the compartment of a tank without dished ends lo Overall length of the tank lz
Length of the tank without dished ends n1
Distance of the saddle foot to the bottom of the tank r1
Crown radius of dished ends r2
Knuckle radius of dished ends r3
Knuckle radius of the outer dished end s1 Nominal thickness of inner skin and inner dished ends s2 Interstitial space s3 Nominal thickness of outer skin s4 Nominal thickness of outer dished ends s5 Nominal thickness of compartment dished ends s6 Nominal thickness of manhole flange and cover s7 Plate thickness of manhole body
Angle of the saddle β Angle of the compensation plate γ Incline angle for T-joint welding
δ
Thermal expansion coefficient of the liquid
Key 1 Weld Figure 1 — Example of double skin aboveground tank, symbols
In addition to the above details the manufacturer shall obtain from the purchaser the following requirements: a) number of compartments and their volumes; b) material specification or liquid to be stored; c) kind of internal and/or external coating, if relevant. 4.2 Materials 4.2.1 General The manufacturer shall select the tank material in accordance with the purchaser's specific requirements or provide information with the tank concerning the suitability of the tank material for the storage media (e.g. by reference to EN 12285-1:2003, Annex B). 4.2.2 Materials for shell, dished ends and manholes Steel according to EN 10025-2, EN 10028-2, EN 10028-7 or EN 10088-1 may be used if the mechanical properties are at least equal to those of S 235 JR according to EN 10025-2. In cases where low temperatures have to be considered (below - 20 °C) at least steel grade S 235 J2G3 according to EN 10025-2 or equal shall be used and in this case wall-thicknesses shall be 6 mm minimum. 4.2.3 Materials for tank fittings Materials used for the fabrication of tank fittings if welded to the tank shall be compatible with the tank material. 4.2.4 Consumables All welding rods/wires and other consumables shall be compatible with the basic material. 4.2.5 Material inspection documentation Material inspection documents for shell plates and dished ends made of carbon steel according to EN 10025-2 shall be in accordance with 3.2 of EN 10204:2004 (Test report “type 2.2”), for all other steel qualities they shall be in accor-dance with 4.1 of EN 10204:2004 (Inspection certificate 3.1 “type 3.1”).
s5
s5
800 up to 1 600 5
1 601 up to 2 000 6
2 001 up to 2 500 6
2 501 up to 3 000 7
a If loose saddles are used see also Table 7.
4.3.6.2 Outer skin 4.3.6.2.1 Circumferential angle The outer skin shall enclose at least 300° of the circumference of the tank, leaving not more than 60° on the top uncovered. In cases where the manhole diameter exceeds d1/2, the manhole shall be provided with an outer skin. 4.3.6.2.2 Interstitial space The interstitial space gap should be as small as practically possible but suitable for the leak detection system to function.
Key e Minimum distance Figure 2 — Shell plate arrangement for inner and outer skin 4.6 Manholes and inspection covers Unless otherwise specified by the purchaser, the tanks shall be equipped with at least one inspection cover per compartment. In cases where inspection covers are not allowed, the tanks shall have one manhole of at least d2 = 600 mm and no part of a compartment shall be more than 10 m from a manhole. Single skin tanks shall always have a manhole. The manufacturer shall decide whether manholes (inspection covers, nozzles) shall be of set-through or set-on-type. Nozzles and flanges shall either be welded inside and outside, or by full penetration. For the dimensions of the manholes and its components see Table 4. Gaskets shall be provided and suitable for their purpose.
Bolts Inside diameter d2 mm Plate thick-ness of manhole body s7 mm Diameter of cover d3 mm Pitch circle diameter kp mm Bolt hole diameter
mm Flange thickness and cover thickness s6 mm Thread size
Number
Class A
Class B and C
600 a 6 720 680 12 16 32 800 7 920 880 12 20 44 1 000 b 7 1 120 1 080
18 -- 20
M 16
48 a If a manhole is required and no specification is given by the purchaser this diameter shall be used. b For tanks of Class C inside diameters of the manhole (d2) exceeding 800 mm are not permitted.
Instead of the manhole covers shown in the Figure 3 and dimensioned in Table 4, ribbed or embossed covers may be used in Class A-tanks with a plate thickness at least equal to the thickness of the inner tank s1. A ribbed or embossed cover shall withstand the test pressure Pt1 (see Table 9). Inspection openings shall only be used for tanks of Class A with d1 ≤ 1 250 mm and tanks of Classes B and C with d1 ≤ 1 000 mm. The diameter of the inspection cover shall not be larger than 300 mm and not smaller than
120 mm, and the thickness of the inspection cover shall be equal to the minimum thickness of the inner tank.
Dimensions in millimetres
Key 1 Gasket 2 Set-on nozzle 3 Set-through nozzle 4 Vent or other pressure relief device Figure 3 — Examples for manholes
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...