EN 1858:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Chimneys - Components - Concrete flue blocksDimniki – Sestavni deli – Betonski bloki za dimnikeConduits de fumée - Composants - Conduits de fumée simple et multiparois en bétonAbgasanlagen - Bauteile - Betonformblöcke91.100.30Beton in betonski izdelkiConcrete and concrete products91.060.40Dimniki, jaški, kanaliChimneys, shafts, ductsICS:SIST EN 1858:2003enTa slovenski standard je istoveten z:EN 1858:200301-december-2003SIST EN 1858:2003SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1858July 2003ICS 91.060.40; 91.100.30English versionChimneys - Components - Concrete flue blocksConduits de fumée - Composants - Conduits de fuméesimple paroi en bétonAbgasanlagen - Bauteile - BetonformblöckeThis European Standard was approved by CEN on 2 December 2002.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1858:2003 E

Test methods.19Annex B (informative)
Example of concrete flue block shapes.38Annex C (normative)
Thermal resistance calculation method.42Annex D (normative)
Requirements of sampling plan according to ISO 2859-1 at anAcceptable Quality Level (AQL) of 10% and inspection level S2.43Annex ZA (informative)
Clauses of this European standard addressing the provisions ofthe EU Construction Products Directive.48Bibliography.53

The flue blocks may be of single wall ormulti wall construction.
The standard does not apply to blocks with back ventilation.The standard specifies a type of block to dimensionally co-ordinate with masonry unit coursing height,referred to as a type B (Bonding block).This European standard also applies to storey-height and reinforced flue blocks.NOTE 1Classes in this standard are not derived from conditions referred to in article 3.2 of Directive 89/106/EC, andshould only be considered as technical classes in the sense of Commission Guidance Paper E ‘Levels and classes inthe Construction Products Directive’.NOTE 2Any reference to the term flue liners implies both flue liners and their fittings, except where otherwiseindicated.2 Normative referencesThis European Standard incorporates, by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisions of anyof these publications apply to this European standard only when incorporated in it by amendment orrevision. For undated references the latest edition of the publication referred to applies (includingamendments).EN 1443:2003, Chimneys - General requirementsEN 1859:2000, Chimneys— Metal chimneys — Test methodsEN 10088-2, Stainless steel Part 2 : Technical delivery conditions for sheet/plate and strip of corrosionresisting steels for general and construction purposesEN 10218-2, Steel wire and wire products - General Part 2 : Wire dimensions and tolerances.EN 13384-1 Chimneys – Thermal and fluid dynamic calculation methods – Part 1 : Chimneys
servingone appliance.’ISO 2859-1, Sampling procedures for inspection by attributes - Part 1 : Sampling schemes indexed byacceptance quality limit(AQL)for lot-by-lot inspection.EN ISO 7500-1 Metallic materials -- Verification of static uniaxial testing machines -- Part 1:Tension/compression testing machines. (ISO 7500-1:1999)

Internal lengthFigure 1 — Manufacturer's declared length3.4manufacturer's declared structural heightmaximum constructional height of the flue blocks as declared by the manufacturer3.5manufacturer's declared overall wall thicknessdimensions at its thinnest point, between the inside face of the flue and the outside face of the flue block,not measured at any joint feature, e.g. spigot/socket end3.6multi wall flue blockflue block consisting of a flue liner and at least one additional wall3.7reinforced flue blockflue block having reinforcement to assist handling (not for structural stability)

Abbreviated designations for common types of concrete flue blocksTypeTemperaturePressureSootfireCondensate resistanceresistanceA1T600Negative N1Yes GDryA2T600Negative N2Yes GDryB1T450Negative N1Yes GDryB2T450Negative N2Yes GDryB3T450Negative N1No ODryC1T400Negative N1Yes GDryC2T400Negative N2Yes GDryC3T400Negative N1No ODryD1T300Negative N1No ODryD2T300Negative N1No OWet and DryD3T300Positive P1No OWet and DryE1T250Negative N1No ODryE2T250Negative N1No OWet and DryE3T250Positive P1No OWet and DryF1T200Negative N1No ODryF2T200Negative N1No OWet and DryG1T160Negative N1No OWet and DryG2T160Positive P1No OWet and DryH1T140Negative N1No OWet and DryH2T140Positive P1No OWet and DryJ1T120Negative N1No OWet and DryJ2T120Positive P1No OWet and DryK1T100Negative N1No OWet and DryK2T100Positive P1No OWet and DryL1T80Negative N1No OWet and DryL2T80Positive P1No OWet and DryNOTE
A designated class of flue block is suitable for use in a chimney
with
nominal workingtemperature up to a maximum of that designated. The designation for pressure, soot fireresistance, condensate resistance and corrosion apply throughout the temperature range.

See Annex B for examples of typical flue block types.7.1.2Flue blocks shall have a maximum of four flues or ventilation passages.7.2 Type B flue block7.2.1Type B flue blocks shall comply with the requirements for flue blocks designated T250, N, 0,D1.7.2.2The co-ordinating height of Type B flue blocks shall be declared by the manufacturer.NOTEThe co-ordinating height is the height of the flue block plus an allowance for jointing so that the flueblock will align with one or more specified coursing heights in a brick or block wall. See Figure 2.7.2.3When measured perpendicular to the axis of the flue for Type B flue blocks the minimumdimensions of the flue shall be 90 mm and the cross-sectional flue area shall be not less than16 500 mm2. In transfer blocks the flue shall taper to a diameter of not less than 125 mm.7.2.4The bonding extension on a straight bonding Type B flue blocks shall not be less than 75 mm(see B.3).

Flue2 Flue block3 Masonry unit4
Flue block height5
Co-ordinating height6
Coursing height7
Jointing allowanceFigure 2 — Type B flue blocks jointing with masonry units7.2.5The angle of offset in any Type B flue block shall not exceed 30° (see clause B.3).7.2.6Starter Type B flue blocks shall have internal transverse dimensions not less than305 mm side × 115 mm deep (see clause B.3).7.2.7When jointed together in accordance with the manufacturer's installation instructions, the fluein adjacent Type B flue blocks shall align to within 3 mm.7.3 TolerancesTolerances on manufacturer's declared dimensions, including taper, shall be:a)Declared internal transverse dimensionsbelow 300 mm:
± 3 mm300 mm and above:
± 1,5 %b)Declared lengthbelow 300 mm:
± 5 mm
± 7 mmabove 700 mm:
± 10 mmc)Declared overall wall thicknessbelow 10 mm:
+ 2 mm
-
1 mm10 mm - 40 mm:
+ 5 mm
- 1,5 mmabove 40 mm:
+ 12 %
- 5 %7.4 Straightness7.4.1When tested as described in A.2 the limit deviation from straightness of a straight concreteflue block of manufacturers declared length greater than 300 mm and less than 1000 mm shall not begreater than 1 % of the declared length.7.4.2When tested as described in A.2 for flue blocks having a manufactured length equal to orgreater than 1 000 mm the limit deviation shall not be greater than 0,5 % of the manufacturersdeclared length.7.5 Squareness of endsWhen tested in accordance with either procedure described in A.1 shall not touch the upright for the firstprocedure and the dimension G shall not be greater than 5 mm for the second procedure.8 Performance8.1 Heat stress resistance8.1.1When flue blocks and fittings, including those designated soot fire resistant, are tested inaccordance with A.3 at the test temperature appropriate to the designation specified in Table 2, theflue block shall subsequently meet the requirements of 8.4. In addition, flue blocks and fittings havinga compressive strength less than 10 MPa, or having a temperature designation above T250 and/ordesignated soot fire resistant shall meet the requirements of 8.5.When a flue block is multi-flued with an equal wall thickness, the heat stress test shall be carried out onthe flue with the highest designation and temperature.8.1.2Flue block bends, made of the same material mix and by the same method of manufacture asthe tested straight flue block shall be deemed to comply with the requirement in 8.1.1.8.1.3 For flue block bends and fittings, made of a different material mix or using a different methodof manufacture from those described in 8.1.2, shall be checked for heat stress resistance by testing aspecial straight test sample in accordance with 8.1.1. This straight test sample shall be made using thesame material mix and manufacturing method as the bend or fitting.8.1.4 The maximum temperature measured on the surface of adjacent combustible materials shallnot exceed 85°C when related to an ambient temperature of 20 °C. The distance to the a combustiblepartition wall with a thermal resistance of 0,4 m2K/W at 100 °C shall be declared. This distance shallbe determined in accordance with A.3 at a test temperature specified in Table 2 appropriate to theproduct designation.

30 min ±1 min the block shall subsequently meet the requirements of 8.4.8.2.2 Flue block bends made of the same material mix and by the same method of manufacture asthe tested straight flue block shall be deemed to comply with the requirement in 8.4.8.2.3Flue block bends and fittings made of a different material mix or using a different method ofmanufacture from those described in 8.2.1 shall be checked for heat shock by testing a special straighttest in accordance with 8.1.1.8.2.4The maximum temperature measured on the surface of adjacent combustible materials shall notexceed 100 °C when related to an ambient temperature of 20 °C when the test assembly is tested at thetest temperature of 1 000 °C over a period of 30 min. The distance to the combustible partition with athermal resistance of 0,04 m2K/W shall be declared.NOTEThis requirement is declared fulfilled when flue blocks, where combustibles are at least 50 mm fromthe outer wall and the space ventilated are tested in a free standing assembly at the test temperature of 1 000 °Cover a period of 30 min the temperature of the outer wall does not exceed 140 °C at an ambient temperature of20 °C.Table 2 — Heat
stress test temperatureTemperature groupTemperature of flue gas°CT 600700 050+T450550 050+T 400500 050+T 300350 035+T250300 030+T 200250 025+T 160190 019+T140170 017+T 120150 015+T100120 012+T 080100 010+8.3 Thermal resistanceThermal resistance shall be measured according to the method given in A.4 or calculated according to themethod given in Annex C and the value obtained declared.

are tested as described in clauseA.8 the maximum amount of test solution passing through the wall of the flue block during any 20 24+h testperiod shall not be greater than 0,5 g/h/m2 of the flue block external surface.8.9 Bulk densityWhen
flue blocks are tested as described in clause A.9 the lowest and highest bulk density value shall bewithin a limit deviation of ± 10 % of the manufacturers declared bulk density for the block.8.10 Flexural strength under wind loadingFlue blocks to this standard are not tested for stability under wind loading. The manufacturer shall declarethe maximum free standing height of flue blocks to this standard which shall be at least 4,5 times the leastlateral overall external dimension of the flue block from the last point of lateral support (see Figure 3).

classes:¾ W for flue blocks for chimneys intended to operate under wet conditions;¾ D for flue blocks for chimneys intended to operate under dry conditions.9.6 Corrosion resistance classCorrosion resistance classes for chimneys which convey products of combustion from gas or light oils andnatural wood or heavy oils and solid mineral fuels are given in Table 5.

±50 mm internal diameter. For other geometrical configurations, the flue liner shall have an equivalentcross-sectional area range.12.2 Further type testsType tests shall be performed when a change is made either in material composition, processingtechnique or to the design or method of manufacture of the flue block, but they may be performedmore frequently by incorporation into a plan for monitoring the consistency of manufacture (seeTable 6).Table 6 — Factory production control and type testsRelevant requirement clausesItemFactory production control12.3 aType tests12.1 and 12.2Flue blocks and fittings4; 5; 6; 7.3, 7.4; 7.5; 8.4; 8.6;8.98.1; 8.2; 8.3; 8.4; 8.5; 8.6; 8.7;8.8; 8.10; 8.11; 8.12a The tests carried out during FPC are intended to verify that the performancerequirements assessed through the initial type testing are maintained.12.3 Factory production controlTo achieve compliance with this standard, the manufacturer shall establish and maintain an effectivedocumented quality system.Factory production control tests are carried out following manufacture to monitor the quality of product(see Table 6).Sampling and testing of any batch shall be completed prior to removal from the works and shall be inaccordance with ISO 2859-1 at an AQL of 10 % and inspection level S2. Isolated batches of units shallbe assessed in accordance with tightened inspection procedures, with a maximum batch size of 2 500(see Annex D).Batches rejected under the factory production control procedure may be resubmitted once, afterremoval of units with previously undetected visible defects, under the tightened inspection procedures,in respect only of the defect that caused initial rejection.NOTEA quality system assessed by a certification body which complies with the requirements of EN 45012may be applied to ensure that the requirements of EN ISO 9001 and clause 12 are complied with.

procedurePlace the flue block upright on the test bench with the base of the flue block touching the collar. Rotate theflue block through 360°.A.1.3 ResultRecord any case where the flue block touches the upright.A.1.4 Second procedurePlace the flue block upright on the test bench and apply one arm of the square along its side with theother arm touching the end of the flue block. Rotate the square across the end of the flue block as shownin Figure A.1 b).

% of the declared length.LT/2LT/2LTDSLNKeyLN
is the nominal length of the flue block in mm;LT
is the test length in mm;DS
is the deviation from straightness in mm;LN - LT
= 100 mm.Figure A.2 — Straightness testA.3 Heat stress resistance and heat shock testNOTEThe heat shock test is a method to assess the chimney for ability to resist sootfireA.3.1 ApparatusA heat generator capable of delivering completely combusted hot gas at the temperature specified inTable 2, having a CO/CO2 ratio not greater than 0,01 with the appropriate volume flow for the cross-section specified in Table A.1, with the heat source shielded.

0, 04 m2K/W ±
10 % at 100 °C at the manufacturers declareddistance to combustibles. Seal the openings with
non-combustible materials (sides and top, seeFigure A.3), unless the manufacturer allows the gap to be ventilated.If the block has more than one passage, test the passage which has the highest temperature designationfor a flue block.A.3.3 Test environment and conditioningA.3.3.1 Test room¾ Ambient air temperature: 15 °C up to 30 °C;¾ Draughts into the test room : £ 0,5 m/s;NOTE
This requirement is assumed to be met by a closed room environment.¾ Location of measurements: minimum height of 1,0 m above the floor and at least 1,0 m from thewalls;¾ Minimum distance between the chimneys and other structures (i.e. walls): 1,0 m;¾ Free connecting space if the laboratory is divided in several levels.These ambient air conditions are measured a maximum of 1,0 m from the test assembly.Limit deviation of measurements shall be:a)± 1,5 °C for the ambient temperature;b)± 0,05 m/s for the velocity of draughts;c)± 0,05 m for the distances.A.3.3.2 Assembly conditioningCondition the test assembly for a minimum of 28 days at ambient temperature unless otherwise specifiedby the manufacturer, then remove all loose material by conducting 20 brush cycles as in A.6.A.3.3.3 Dry/conditioning phaseUnless otherwise specified by the manufacturer deliver flue gases into the test assembly in such a waythat the temperature, measured as described in A.3.4.1, rises to 200 °C or the nominated test temperaturewhichever is the lower in 60 min ± 5 min.

surface of the flue.The OTDF is calculated by : Highest temperature at sensors A – EAverage temperature of sensors A - EA.3.4.2Deliver completely combusted gas, according to the flow rate specified in Table A.1, intothe test sample and within 10 min raise the temperature of the gas uniformly to the appropriate testtemperature (see Table 2) measured at the location determined as specified in A.3.4.1.A.3.4.3Maintain the delivery of gas until the temperature at any of the specified points ofmeasurement does not rise by more than 2 K in 30 min (equilibrium) or to a maximum time of 4 h.For the test assembly described in A.3.2 a) the points of measurement shall be on the exposed facesof the test sample at the mid point of a complete flue block near the centre of the assembly
or at least100 mm from a joint. For rectangular sections the measurement shall be taken at the mid point of thelonger side.For the test sample described in A.3.2 b) additional points of measurement shall be on both faces ofthe combustible partition at a location opposite to the mid point of the test sample and, where thespace between the test sample and partition is closed, at a point 50 mm inside the space from theends of the test sample, opposite its centre line.Allow the test sample to cool to ambient without assistance, e.g. without forced ventilation.Determine the maximum temperature at the points of measurement.A.3.4.4For the heat shock test maintain the flue gas temperature at 1 000 050+ °C for a period of(30 ± 1) min.Determine the maximum temperature at the points of measurement.A.3.4.5 Test resultsRecord the maximum temperature of the test sample, andeither :a) If the test temperature described in A.3.2 a) was used, calculate what the surface temperature of acombustible partition, having a thermal resistance of 0,4 m2K/W ± 10 % at 100 °C, would havebeen when separated from the test sample by the specified distance to combustible materials (asdeclared by the manufacturer);NOTE 1A method for calculating the surface temperature of adjacent combustible material is given inAnnex K of prEN 12391:1996.NOTE 2The specified distance to combustibles may be specified in local regulations.,orb)If the test assembly described in A.3.2 b) was used, record the maximum surface temperature ofthe combustible partition. Record the air permeability E of the test sample.

(Volume flow in m3/h)Test temperature°CDiametermm100120150170190250300350500550700
8042,142,943,945,146,350,253,757,267,468,280,610065,866,968,570,472,378,583,989,3105110126125102104107110113123132140164172197150148150154159163177189201237238283175201205210216221240257274322338386200263266274282289314337357421439504B. Thermal performance - positive pressure chimneys
(Volume flow in m3/h)Test temperature°CDiametermm100120150170190250300350500550700
5022,022,824,025,026,028,030,032,037,038,844,18064,066,069,072,074,080,085,591,0107112126100105109115119122133142151177185209125174180189196202220235249292305345150262271285295304331353375440460520175370383404417430468500531622651736200500518545564580632675717840879994C. Thermal shock - negative and positive pressure chimneys
(Volume flow in m3/h)Diametermm80100125150175200Temperature1 000 °C108144252360468612NOTE
The flow rates are for heat generation from natural gas combustion.

An example is shown in Figure A.4.
Install in each arm of the testassembly a minimum of 2 m of test chimney sections including at least two joints.
Bondthermocouples used to measure the internal and external wall surface temperatures to the testassembly using manufactures jointing material.A.4.2 Test procedureCirculate hot gas around the test assembly.
The velocity of the hot gas shall be (4 ± 1) m/s, and thehot gas temperature at the ends of the test sections shall not differ by more than 10 K.Measure the internal and external surface temperatures of the chimney sections, and the hot gastemperature at the ends of the chimney.
For chimneys designated suitable for wet conditions, the hotgas shall be water vapour saturated and shall have a heat content and temperature so that the innersurface reaches a temperature of 70 °C.
For chimneys designated suitable for dry conditions, the hotgas shall have a heat content and temperature so that the inner surface reaches a temperature 20 %below the designated temperature (Normal working temperature), but not more that 200 °C.Equilibrium is reached when the difference between the outer surface temperature of the chimneysection and the ambient temperature does not change by more than 1 % in 60 min.A.4.3 Test resultsThe thermal resistance (1/l) in square metres x Kelvin per Watt (m2 K/W) is established using thefollowing formula:1/l = Ai x (ti-to) / Energy lost in the fluewhereAi
is the inner surface area of the chimney in square metres (m2) ;ti
is the temperature at inlet to the flue under test (°C);to is the temperature at outlet of the flue under test (°C);Energy lost in flue is the temperature drop across chimney x mass flow rate x specific heat of air(W).

is the air permeability, in litres per second (l m-2 s-1 );Q
is the air volume, in litres (l) passing through the test assembly during test;t
is the test duration, in seconds (s);S
is the inside surface area of the flue block, in square meters (m2).213645Key1Seal2Flow meter3Fan4Seal5Jointed flue blocks6Pressure gaugeFigure A.5 —Air leakage measurement
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