SIST EN 14879-6:2010
(Main)Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media - Part 6: Combined linings with tile and brick layers
Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media - Part 6: Combined linings with tile and brick layers
This European Standard describes the requirements for and methods of testing of combined systems with tile and brick layers which are applied to concrete or metallic process engineering equipment that will come in contact with chemical substances (liquids, solids and gases). The requirements specified here may be used for the purposes of quality control (e.g. as agreed between the contract partners or having been given by national regulations1)). The standard applies to systems which serve one or more of the following purposes: to protect the component from adverse effects of aggressive substances; to protect waters (e.g. ground water) against hazardous substances; to protect the charge from becoming contaminated by components released from the substrate material; to achieve a particular surface quality. The described combined systems can be used for concrete or metallic process engineering equipment that will come into contact with chemical substances. The combined system is a combination of: a coating according to EN 14879-2 or EN 14879-3 with an additional layer of tiles or bricks embedded in cement mortar, resin based mortar and/or potassium silicate mortar as an adhesive bonding cement (referred to simply as cement in this standard); or a lining according to EN 14879-4 or EN 14879-5 with an additional layer of tiles or bricks embedded in cement mortar, resin based mortar and/or potassium silicate mortar as an adhesive bonding cement (referred to simply as cement in this standard). For design and preparation of substrate, see EN 14879-1.
Beschichtungen und Auskleidungen aus organischen Werkstoffen zum Schutz von industriellen Anlagen gegen Korrosion durch aggressive Medien - Teil 6: Kombinierte Auskleidung mit Plattierungen (Plattenlagen) und Ausmauerungen
Dieses Dokument legt die Anforderungen und Prüfverfahren für kombinierte Systeme (Beschichtungen und Auskleidungen) mit Plattierungen (Plattenlagen) und Ausmauerungen für Bauteile aus Beton oder aus metallischen Werkstoffen in verfahrenstechnischen Anlagen fest, die mit chemischen Substanzen (Flüssigkeiten, Feststoffen und Gasen) in Berührung kommen. Die in dieser Norm festgelegten Anforderungen dürfen für die Qualitätslenkung zugrunde gelegt werden (z. B. nach Vereinbarung zwischen den Vertragspartnern oder nach den Vorgaben durch nationale Regelungen).
Die vorliegende Norm gilt für Systeme für eine oder mehrere der folgenden Verwendungszwecke:
- Schutz des Bauteils vor schädlichen Einwirkungen durch aggressive Stoffe;
- Schutz der Gewässer (z. B. Grundwasser) vor schädlichen Stoffen;
- Schutz des Füllgutes vor Verunreinigung durch lösliche Bestandteile im Trägerwerkstoff;
- Erzielung einer besonderen Oberflächenbeschaffenheit.
Die beschriebenen kombinierten Systeme sind für Bauteile aus Beton oder aus metallischen Werkstoffen in verfahrenstechnischen Anlagen zu verwenden, die mit chemischen Substanzen in Berührung kommen.
Das kombinierte Oberflächenschutzsystem besteht aus:
- einer Beschichtung nach EN 14879-2 oder EN 14879-3, zusätzlich versehen mit Plattierungen (Plattenlagen) und Ausmauerungen, die in Zementmörtel, Kunstharzmörtel und/oder Wasserglaskitt (in dieser Norm kurz Kitt genannt) als Haftmittel eingebettet sind, oder
- einer Auskleidung nach EN 14879-4 oder EN 14879-5, zusätzlich versehen mit Plattierungen (Plattenlagen) und Ausmauerungen, die in Zementmörtel, Kunstharzmörtel und/oder Wasserglaskitt (in dieser Norm kurz Kitt genannt) als Haftmittel eingebettet sind.
Zu Konstruktion und Vorbereitung des Trägerwerkstoffes, siehe EN 14879 1.
Systèmes des revêtements organiques pour la protection des appareils et installations industriels contre la corrosion par des fluides agressifs - Partie 6 : Revêtements rapportés associés à des couches de carreaux et de briques
La présente Norme européenne décrit les exigences et les méthodes d'essai de systèmes rapportés
associant des couches de carreaux et de briques, appliqués sur des équipements pour l’industrie chimique,
métalliques ou en béton, venant en contact avec des substances chimiques (liquides, solides et gaz). Les
exigences ici spécifiées peuvent être utilisées à des fins de contrôle qualité (par exemple, convenues entre
les Parties au contrat ou ayant été définies par des règlements nationaux1)).
Cette norme est applicable aux systèmes destinés à l’un au moins des usages suivants :
protéger le composant contre les effets néfastes des substances corrosives ;
protéger les eaux (par exemple, les nappes phréatiques) des substances dangereuses ;
empêcher toute contamination des charges par des composants provenant des matériaux du subjectile ;
obtenir une qualité de surface spécifique.
Les systèmes combinés décrits dans le présent document peuvent être utilisés pour des équipements de
l’industrie chimique, métalliques ou en béton, entrant en contact avec des substances chimiques.
Le système rapporté combiné est une combinaison :
d’un revêtement conforme à l’EN 14879-2 ou à l’EN 14879-3 comportant une couche supplémentaire de
carreaux ou de briques incrustée dans un mortier au ciment, un mortier à base de résine et/ou un mortier
au silicate de potassium utilisé comme ciment adhésif (désignés simplement par le terme de ciment dans
la présente norme) ; ou
d’un revêtement rapporté conforme à l’EN 14879-4 ou à l’EN 14879-5 comportant une couche
supplémentaire de carreaux ou de briques incrustée dans un mortier au ciment, un mortier à base de
résine et/ou un mortier au silicate de potassium utilisé comme ciment adhésif (désignés simplement par
le terme de ciment dans la présente norme).
Pour la conception et la préparation des subjectiles, voir l’EN 14879-1.
Sistemi organskih premazov in prevlek za protikorozijsko zaščito industrijskih naprav in obratov v kemijsko agresivnih pogojih - 6. del: Kombinirane prevleke s ploščicami in zidaki
Ta evropski standard opisuje zahteve in metode preskušanja kombiniranih sistemov s ploščicami in zidaki, ki se uporabljajo pri inženirski opremi za betonske ali kovinske postopke in prihajajo v stik s kemičnimi snovmi (tekočimi, trdnimi in plinskimi). Zahteve, določene na tem mestu, se lahko uporabljajo za nadzor kakovosti (npr. kot se dogovorita pogodbena partnerja ali kot določajo državni predpisi). Standard velja za sisteme, ki se uporabljajo za enega ali več od naslednjih namenov: za zaščito komponente pred škodljivimi vplivi agresivnih snovi; za zaščito vode (npr. talnice) pred nevarnimi snovmi; za zaščito bremena pred kontaminacijo s komponentami, ki se sproščajo iz substratnega materiala; za doseganje določene kakovosti površine. Opisani kombinirani sistemi se lahko uporabljajo za inženirsko opremo za betonske in kovinske postopke, ki prihaja v stik s kemičnimi snovmi. Kombinirani sistem je kombinacija: premaza v skladu z EN 14879-2 ali EN 14879-3 z dodatnimi ploščicami ali zidaki, vgrajenimi v cementno malto, malto na osnovi smole in/ali malto iz kalijevega silikata, ki deluje kot adhezivni vezivni cement (v tem standardu se navaja preprosto kot cement), ali prevleke v skladu z EN 14879-4 ali EN 14879-5 z dodatnimi ploščicami in zidaki, vgrajenimi v cementno malto, malto na osnovi smole in/ali malto iz kalijevega silikata, ki deluje kot adhezivni vezivni cement (v tem standardu se navaja preprosto kot cement). Za zasnovo in pripravo substrata glej EN 14879-1.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LQGXVWULMVNLKBeschichtungen und Auskleidungen aus organischen Werkstoffen zum Schutz von industriellen Anlagen gegen Korrosion durch aggressive Medien - Teil 6: Kombinierte Auskleidung mit Plattierungen (Plattenlagen) und AusmauerungenSystèmes des revêtements organiques pour la protection des appareils et installations industriels contre la corrosion par des fluides agressifs - Partie 6 : Revêtements rapportés associés à des couches de carreaux et de briquesOrganic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media - Part 6: Combined linings with tile and brick layers25.220.60Organske prevlekeOrganic coatingsICS:Ta slovenski standard je istoveten z:EN 14879-6:2009SIST EN 14879-6:2010en,fr,de01-marec-2010SIST EN 14879-6:2010SLOVENSKI
STANDARD
SIST EN 14879-6:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14879-6
December 2009 ICS 25.220.60 English Version
Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media - Part 6: Combined linings with tile and brick layers
Systèmes des revêtements organiques pour la protection des appareils et installations industriels contre la corrosion par des fluides agressifs - Partie 6 : Revêtements rapportés associés à des couches de carreaux et de briques
Beschichtungen und Auskleidungen aus organischen Werkstoffen zum Schutz von industriellen Anlagen gegen Korrosion durch aggressive Medien - Teil 6: Kombinierte Auskleidung mit Plattierungen (Plattenlagen) und Aus-mauerungen This European Standard was approved by CEN on 24 October 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14879-6:2009: ESIST EN 14879-6:2010
EN 14879-6:2009 (E) 2 Contents Page Foreword .41Scope .52Normative references .53Terms and definitions .64General .74.1Steel vessels and apparatus .74.1.1Calculating the dimensions of brick-lined steel vessels .74.1.2Dimensional tolerances (for steel and non-ferrous vessels) .94.1.3Construction of steel vessels .94.1.4Installation of brick-lined vessels . 104.1.5Leak tests . 104.1.6Repairs and modifications . 104.2Concrete vessels and apparatus . 104.2.1Calculating the dimensions of brick-lined concrete vessels . 104.2.2Dimensional tolerances . 104.2.3Requirements to the concrete construction . 104.3Substrate preparation . 104.4Sealing layer . 104.5Service layer . 114.5.1Bedding and jointing mortar/cement . 114.5.2Jointing materials for expansion joints . 174.5.3Semi-finished products . 174.6Combined lining system . 204.7Selection criteria . 214.7.1Type and frequency of fluid loading . 214.7.2Thermal loading . 224.7.3Changes in temperature . 224.7.4Mechanical loading . 224.7.5Weather factors . 234.8Materials manufacturer . 234.9Applicator . 234.10Application . 234.10.1Sealing layers . 234.10.2Service layer . 244.10.3General requirements . 274.11Protected objects . 275Requirements . 275.1Fluid load, chemical resistance and tightness . 275.2Thermal loading . 275.3Temperature change loading . 285.4Mechanical loading . 285.5Anti-slip protection . 295.6Crack bridging . 295.7Adhesion strength . 295.8Ageing behaviour. 295.9Weathering behaviour . 295.10Concrete compatibility . 295.11Behaviour in cleaning and neutralization processes . 295.12Capability of dissipating static charges . 295.13Behaviour in fire. 306Testing . 306.1General . 306.2Receiving inspection of coating/lining materials . 306.2.1Inspection of materials, components and their markings . 306.2.2Checking storage conditions . 30SIST EN 14879-6:2010
EN 14879-6:2009 (E) 3 6.3Testing of combined lining systems during application . 306.3.1Ambient conditions . 306.3.2Sealing layer . 316.3.3Service layer . 316.3.4Documentation . 316.4Suitability testing . 316.4.1General . 316.4.2Testing of combined linings . 32Annex A (informative)
Selection criteria for surface protection systems . 36A.1Load profiles and suitable surface protection systems for floors and walls . 36A.2Load profiles and suitable surface protection systems for collecting basins . 37A.3Load profiles and suitable protection for production plant floors . 38A.4Load profiles and suitable protection for collecting basins, gutters, channels, pipes, etc. . 39A.5Load profiles and suitable protection for containers . 40Annex B (normative)
Overview of verification of suitability for combined linings . 41Annex C (normative)
Testing the dissipation capability . 42C.1General . 42C.1.1Dissipation resistance . 42C.1.2Ground dissipating resistance . 42C.2Testing the dissipation resistance of test samples . 42C.2.1Instruments . 42C.2.2Test procedure . 42C.2.3Test report . 42C.3Measuring the ground dissipation resistance on the laid surface protection system . 43C.3.1Instruments . 43C.3.2Preparation . 43C.3.3Test procedure . 43C.3.4Test report . 44Annex D (normative)
Test methods for tolerances and limit deviations . 45D.1Scope and purpose . 45D.2Tolerances and limit deviations . 45D.2.1Cylindrical vessel . 45D.2.2Flat-sided vessels . 47D.3Test methods . 47D.3.1General . 47D.3.2Cylindrical vessel, cylindrical part . 47D.3.3Shop-fabricated cylindrical vessel, flat base . 49D.3.4Flat-sided vessels, angular horizontal projection (Determination of the flatness of the faces) . 50Annex E (informative)
A-deviations . 52Bibliography . 53 SIST EN 14879-6:2010
EN 14879-6:2009 (E) 4 Foreword This document (EN 14879-6:2009) has been prepared by Technical Committee CEN/TC 360 “Project Committee - Coating systems for chemical apparatus and plants against corrosion”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2010, and conflicting national standards shall be withdrawn at the latest by June 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. EN 14879, Organic coating systems and linings for protection of industrial apparatus and plants against
corrosion caused by aggressive media, consists of the following parts: Part 1: Terminology, design and preparation of substrate Part 2: Coatings on metallic components Part 3: Coatings on concrete components Part 4: Linings on metallic components Part 5: Linings on concrete components Part 6: Combined linings with tile and brick layers According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Repub-lic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
SIST EN 14879-6:2010
EN 14879-6:2009 (E) 5 1 Scope This European Standard describes the requirements for and methods of testing of combined systems with tile and brick layers which are applied to concrete or metallic process engineering equipment that will come in contact with chemical substances (liquids, solids and gases). The requirements specified here may be used for the purposes of quality control (e.g. as agreed between the contract partners or having been given by na-tional regulations1)). The standard applies to systems which serve one or more of the following purposes: to protect the component from adverse effects of aggressive substances; to protect waters (e.g. ground water) against hazardous substances; to protect the charge from becoming contaminated by components released from the substrate material; to achieve a particular surface quality. The described combined systems can be used for concrete or metallic process engineering equipment that will come into contact with chemical substances.
The combined system is a combination of:
a coating according to EN 14879-2 or EN 14879-3 with an additional layer of tiles or bricks embedded in cement mortar, resin based mortar and/or potassium silicate mortar as an adhesive bonding cement (re-ferred to simply as cement in this standard); or a lining according to EN 14879-4 or EN 14879-5 with an additional layer of tiles or bricks embedded in cement mortar, resin based mortar and/or potassium silicate mortar as an adhesive bonding cement (re-ferred to simply as cement in this standard). For design and preparation of substrate, see EN 14879-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 206-1, Concrete – Part 1: Specification, performance, production and conformity EN 13501-1:2007, Fire classification of construction products and building elements – Part 1: Classification using data from reaction to fire tests EN 14879-1:2005, Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media – Part 1: Terminology, design and preparation of substrate EN 14879-2:2006, Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media – Part 2: Coatings on metallic components EN 14879-3:2006, Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media – Part 3: Coatings on concrete components
1) For the purposes of this standard, the contract partners are the coating material, lining, mortar, tiles and bricks
manu-facturers, the component manufacturer, the person(s) responsible for applying the coating, lining, mortar, tiles and bricks, and the client ordering the finished component(s). SIST EN 14879-6:2010
EN 14879-6:2009 (E) 6 EN 14879-4:2007, Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media – Part 4: Linings on metallic components EN 14879-5:2007, Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media – Part 5: Linings on concrete components EN ISO 291, Plastics – Standard atmospheres for conditioning and testing (ISO 291:2008) EN ISO 10545-12, Ceramic tiles – Part 12: Determination of frost resistance (ISO 10545-12:1995, including Technical Corrigendum 1:1997) IEC 60093:1980, Methods of test for volume resistivity and surface resistivity of solid electrical insulating ma-terials IEC 60167, Methods of test for the determination of the insulation resistance of solid insulating materials 3 Terms and definitions For the purposes of this document, the following terms and definitions in addition to those of EN 14879-1:2005, EN 14879-2:2006, EN 14879-3:2006, EN 14879-4:2007 and EN 14879-5:2007 apply. 3.1 combined lining system combined lining system applied as a protection against chemical, mechanical and thermal loading NOTE Such systems comprise a sealing layer and a service layer (see Figure 1). Taken together, the two layers pro-vide a more effective protection than each layer would provide on its own. 3.2 sealing layer bottom layer of the combined lining system that is applied to the concrete or metal surface NOTE
It serves both as a primer (promoting adhesion) and as a layer which is impervious to liquids. 3.3 service layer top layer of the combined lining system, which is made of tiles or bricks bonded to the sealing layer by means of mortar or cement
NOTE It serves to protect the sealing layer from the direct contact with chemical, mechanical and thermal loads. 3.4 semi-finished product tile, brick, also in other shapes EXAMPLES Pipes, nozzles. 3.5 jointing mortar mortar or cement used to fill the joints between the semi-finished products 3.6 bedding mortar mortar or cement used to form the bed between the sealing layer and the surfacing units 3.7 bed joint layer of mortar between the sealing layer and the service layer SIST EN 14879-6:2010
EN 14879-6:2009 (E) 7 3.8 butt joint joint between tiles and/or bricks 3.9 "closed-joint" technique technique by which the bedding is laid and joints between tiles and/or bricks are filled at the same time 3.10 "open-joint" technique technique by which the joints between tiles and/or bricks are left open and then filled at a later time
Key 1 Hollow joint, 6 to 8 mm wide 2 Butt joints filled with jointing mortar/cement 3 Service layer (Combination of 6 and 7) 4 Sealing layer
5 Steel or concrete substrate 6 Bed joint; bedding mortar/cement 7 Acid-proof tiles, bricks Figure 1 — Lay-up of a combined lining system 4 General 4.1 Steel vessels and apparatus 4.1.1 Calculating the dimensions of brick-lined steel vessels The dimensions of brick-lined vessels shall be calculated so that deformations of the structure shall not at any point assume proportions liable to damage the brick lining. Brick-lined vessels which are operated by heat and/or pressure shall be designed on the basis of principles that go beyond the requirements for pressure vessels, account being taken of the following: SIST EN 14879-6:2010
EN 14879-6:2009 (E) 8 a) The necessary contact between the vessel wall and the brick lining; b) Protection against crack formation in the brick lining; c) Swelling of the brick lining (mortar/cement) which is possible. Harmful tensile stresses in brick linings shall be avoided. These stresses may be calculated primarily on the basis of the following variables: d) Modulus of elasticity of the casing (Ee) and the brick lining (Em); e) Thickness of the vessel wall (Se) and the brick lining (Sm); f) Coefficient of linear expansion of the vessel wall (αe) and the brick lining (αm); g) Thermal conductivity of the vessel wall (λ e) and the brick lining (λ m); h) Thermal conductivity of the internal and/or external insulation (λ i) and (λ a), if fitted; i) The internal (αi) and external (αa) heat transfer coefficients; allowance shall be made for the (occa-sionally unilateral) influence which the wind, solar radiation and rainfall may have on the temperature); j) The swelling factors (q) of the materials used for the brick lining. The properties of the materials shall be obtained from the manufacturer's information. Guideline values can be found in 4.5. A stress determination for the brick lining shall be required if very high stresses of thermal origin and/or ex-cess pressure are present. Stress determination may be omitted if experience is available on vessels of simi-lar design operated under similar conditions. The calculation of the thickness of the vessel wall and brick lining shall preferably be based on values estab-lished by experience, bearing in mind that swelling can cause the stresses in the casing and the brick lining to be greater when they are cold than when they are in operation. A subsequent calculation may be carried out to establish whether the stresses in the brick lining and the casing remain within the permissible limits in all cases. Otherwise, different building materials shall be selected, the dimensions shall be modified and/or the casing shall resist an initial tensile stress and the brick lining an initial compressive stress. The thickness of the vessel walls may also be calculated from the requirement relating to compliance with the permissible tolerances in 4.1.2. In calculations of the wall thickness of cylindrical or spherical vessels the influence of the brick lining may be taken into account in case of certain pressure and temperature conditions. Careful account shall be taken of the deformation of the vessel casing by the imposed loads, especially in horizontal vessels. This can reach proportions that lead to damage to the brick lining without the permissible stresses in the casing being exceeded. This type of deformation shall be kept to a low level by suitable design of the imposed loads and adequate reinforcement of the casing, according to national regulations, e.g. DIN 28080, DIN 28081-1, DIN 28081-2, DIN 28083-1, DIN 28084 (all parts), DIN 28082-1 and DIN 28082-2. A deflection of 0001a≤f may be assumed as an indicative value when calculating the dimensions of flat vessel components, where a denotes the bearing width. Bearing widths that are common in practice are be-tween 600 mm and 900 mm. SIST EN 14879-6:2010
EN 14879-6:2009 (E) 9 4.1.2 Dimensional tolerances (for steel and non-ferrous vessels) For test methods for dimensional tolerances see Annex D. After final installation the radii in the cylindrical part may not deviate from the mean value of the plane of measurement by more than ± 0,4 %; in vessels whose diameter exceeds 7 500 mm they may not deviate by more than ± 15 mm. The planes of measurement have a common centre axis. Generally speaking the circum-ference of the measurement circle U shall be divided into 16 equal segments U/16 in order to determine the measurement points. The adjustment of the deviation to the normal circle shall cover at least 1/16 of the length of the circumference, or at least 1 500 mm for diameters in excess of 7 500 mm. The maximum devia-tions of successive measurement points will therefore not exceed 0,4 % or 15 mm. The distance between planes of measurement shall be 1 000 mm to 2 500 mm. These planes of measure-ment, which are perpendicular to the vessel axis, shall be 100 mm from the weld seams of the cylindrical courses with the exception of the first or last plane of measurement in the case of bases or covers according to DIN 28011, DIN 28013 and DIN 28014. With these torispherical or ellipsoidal heads the distance between the nearest plane of measurement and the weld seam between the base and the cylindrical part shall be 1 000 mm. The roundness tolerances for bases and covers are given in national regulations, e.g. DIN 28011, DIN 28013 and DIN 28014, calculation according to EN 13445-3. The straightness tolerance of flat walls shall be 10 mm for any prof
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