SIST EN 523:2003
(Main)Steel strip sheaths for prestressing tendons - Terminology, requirements, quality control
Steel strip sheaths for prestressing tendons - Terminology, requirements, quality control
This Standard is applicable to uncoated cylindrical steel sheaths with a corrugated profile and with a nominal internal diameter of up to 130 mm and their connectors (couplers) which are assembled to form ducts for prestressing tendons in post-tensioned prestressed concrete elements. It applies only to sheaths and connectors made of interlocked or welded strip. The seals required between sheaths and couplers are not covered by this standard.
Hüllrohre aus Bandstahl für Spannglieder - Begriffe, Anforderungen und Konformität
Diese Norm gilt für unbeschichtete kreisförmige Hüllrohre aus Stahl mit wendelförmiger Profilierung bis zu einer Nennweite von 130 mm sowie deren Verbindungsteile (Muffen), die als Spannkanal für Spannglieder in Spann-betontragwerken mit nachträglichem Verbund verwendet werden. Sie gilt nur für Hüllrohre und deren Verbindungs-teile, die durch Falzen oder Schweißen aus Bandstahl hergestellt werden ). Hüllrohre aus Kunststoff werden nicht behandelt ).
Die erforderlichen Abdichtungen von Verbindungsteilen sind nicht Gegenstand dieser Norm.
Gaines en feuillard d'acier pour câbles de précontrainte - Terminologie, prescriptions, contrôle de qualité
La présente Norme européenne est applicable aux gaines en acier cylindriques, non revetues, nervurées, d'un diametre nominal intérieur de 130 mm maximum et a leurs raccords (manchons de raccordement) qui sont assemblés pour former des conduits destinés aux câbles de précontrainte dans des structures en béton précontraint par post-tension. Elle est uniquement applicable aux gaines et aux raccords en feuillard d'acier agrafés ou soudés ). Elle ne couvre pas les gaines plastiques 2).
L'étanchéité exigée entre les gaines et les raccords n'est pas couverte par la présente norme.
Zaščitne cevi za prednapete kable iz jeklenih trakov – Terminologija, zahteve in kontrola kakovosti
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 523:2003
01-november-2003
1DGRPHãþD
SIST EN 523:1999
=DãþLWQHFHYL]DSUHGQDSHWHNDEOHL]MHNOHQLKWUDNRY±7HUPLQRORJLMD]DKWHYHLQ
NRQWURODNDNRYRVWL
Steel strip sheaths for prestressing tendons - Terminology, requirements, quality control
Hüllrohre aus Bandstahl für Spannglieder - Begriffe, Anforderungen und Konformität
Gaines en feuillard d'acier pour câbles de précontrainte - Terminologie, prescriptions,
contrôle de qualité
Ta slovenski standard je istoveten z: EN 523:2003
ICS:
01.040.77
77.140.75
91.080.40
SIST EN 523:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 523
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2003
ICS 01.040.77; 77.140.75; 91.080.40 Supersedes EN 523:1997
English version
Steel strip sheaths for prestressing tendons - Terminology,
requirements, quality control
Gaines en feuillard d'acier pour câbles de précontrainte - Hüllrohre aus Bandstahl für Spannglieder - Begriffe,
Terminologie, prescriptions, contrôle de qualité Anforderungen, Güteüberwachung
This European Standard was approved by CEN on 11 March 2003.
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 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 Management Centre has the same status as the official
versions.
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 United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 523:2003 E
worldwide for CEN national Members.
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EN 523:2003 (E)
Contents
page
1 Scope .3
2 Normative references .3
3 Terms and definitions.4
4 Classification.4
5 Requirements .4
6 Technical documents, delivery ticket, marking and labelling.9
7 Storage.10
8 Procedures for the evaluation of conformity.10
Annex A (informative) Explanatory notes.13
Annex ZA (informative) Clauses of this European standard addressing the provisions of the EU
Construction Products Directive.15
2
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EN 523:2003 (E)
Foreword
This document EN 523:2003 has been prepared by Technical Committee CEN/TC 104 “Concrete and related
products”, 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 February 2004, and conflicting national standards shall be withdrawn at the latest
by February 2004.
This document supersedes EN 523:1997.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
This European Standard applies together with the standards of the EN 524 series which comprises test methods for
sheaths.
Annex A is informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard is applicable to uncoated cylindrical steel sheaths with a corrugated profile and with a
nominal internal diameter of up to 130 mm and their connectors (couplers) which are assembled to form ducts for
prestressing tendons in post-tensioned prestressed concrete structures. It is only applicable to sheaths and
1) 2)
connectors made of interlocked or welded steel strip . It does not cover plastic sheaths .
The seals required between sheaths and couplers are not covered by this standard.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 524-1, Steel strip sheaths for prestressing tendons — Test methods — Part 1: Determination of shape and
dimensions.
EN 524-2, Steel strip sheaths for prestressing tendons — Test methods — Part 2: Determination of flexural
behaviour.
1) In case of coated or galvanised steel additional requirements should be considered, which are not covered by this
standard. Additional requirements may conform to the relevant provisions in the place of use of the product.
2) For plastic sheaths, see annex A.
3
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EN 523:2003 (E)
EN 524-3, Steel strip sheaths for prestressing tendons — Test methods — Part 3: To-and-fro bending test.
EN 524-4, Steel strip sheaths for prestressing tendons — Test methods — Part 4: Determination of lateral load
resistance.
EN 524-5, Steel strip sheaths for prestressing tendons — Test methods — Part 5: Determination of tensile load
resistance.
EN 524-6, Steel strip sheaths for prestressing tendons — Test methods — Part 6: Determination of leaktightness
(Determination of water loss).
EN 10139, Cold rolled uncoated mild steel narrow strip for cold forming - Technical delivery conditions.
ENV 13670-1, Execution of concrete structures - Part 1: Common.
ISO 6932, Cold-reduced carbon steel strip with a maximum carbon content of 0,25 %.
3 Terms and definitions
For the purpose of this European Standard the following terms and definition apply.
3.1
type of sheath
sheaths are designated by the manufacturer according to specific delivery form having certain features, e.g.
production procedure (welded or interlocked), shape of profile, etc.
3.2
connectors (couplers)
connectors are specific devices to join sheath sections. They are usually made from cut ends of sheaths with the
same profile type but with larger diameter (see 5.2)
3.3
stiffener
is an additional components whose purpose is to increase the lateral load strength of the sheaths at supporting points,
e.g. semi-circular sheathing sections placed between supports and tendons
4 Classification
Sheaths are classified by the requirements as given in Table 1.
Category 1 (normal sheaths)
Category 2 (rigid sheaths)
5 Requirements
5.1 Sheaths
5.1.1 General requirements
Sheaths shall have sufficient resistance against the mechanical actions and environmental exposure during storage,
transport and construction period. Sheaths are deemed to be resistant against:
- mechanical actions, if they fulfil the requirements of clause 5.1.5 to 5.1.8;
- environmental exposure, if the requirements of 5.1.2 and clause 7 are fulfilled and the measurements recommended
for handling the sheaths on site in accordance with ENV 13670-1 are taken into account.
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EN 523:2003 (E)
Sheaths shall have a corrugated profile (see Figure 1) to provide a sufficient mechanical bond with the concrete
externally and the grout internally.
Sheaths shall be leaktight (see 5.1.9). The sheaths and their connectors shall be designed in such a way as to allow
this proper sealing of the joints.
5.1.2 Steel strip
Sheaths shall be made from rolled steel strip conforming to EN 10139, ISO 6932 or specified steel with similar
properties. The nominal thickness of the steel strip shall be not less than the values given in Table 1, lines 1a and 1b.
5.1.3 Tolerances (ovality)
Deviations from the mean values of the internal diameter of any cross-section of the sheaths determined according to
EN 524-1 shall not exceed ± 1 % or ± 0,5 mm, whichever is the greater.
5.1.4 Relative volume of the profile
3 2
The relative volume of the profile V determined in accordance with EN 524-1 shall be not less than 0,08 cm /cm .
rel
For nominal internal diameters greater than 25 mm, the height of the profile shall be not less than 2,5 mm (see
EN 524-1).
5.1.5 Flexural behaviour
The relative load F = F /d in N/mm and the load F at the beginning of plastic deformation shall be determined in
rel pl 1 pl
accordance with EN 524-2.
The relative load F for category 2 shall not be less than the given values in Table 1, line 2.
rel
For category 1 there are no requirements but test results shall be given for information to the user in the relevant
documents (see 6.2).
5.1.6 Flexibility
When tested by means of the to-and-fro bending test described in EN 524-3, flexibility is sufficient if, after the bending
test, no significant deformations of the corrugation appear so that the plunger can push in the specimen over its whole
length. A straightening of the specimen by means of the tensile load test (see EN 524-5) is permitted.
5.1.7 Lateral load resistance
The irreversible reduction of the internal diameter shall not exceed 10 % or 5 mm whichever is the smaller when the
loads given in Table 1, lines 4a to 4c are applied according to EN 524-4. If any type of sheaths of class 1 withstands
the load F = 1500 N without a stiffener a test with lower forces in accordance with Table 1, line 4a is not required.
l
5.1.8 Tensile load resistance
When loaded in accordance with EN 524-5, the tensile load strength is sufficient if the sleeve coupling (comprising
sheaths and the corresponding coupler) does not fail by complete separation under the test loads specified in Table 1,
line 5.
5.1.9 Leaktightness
When tested in accordance with EN 524-6, using a specimen tested earlier for flexibility, lateral load resistance and
tensile load resistance, the water loss shall not exceed the values given in Table 1, line 6.
5
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EN 523:2003 (E)
5.2 Connectors (couplers)
5.2.1 General requirements
Couplers made from corrugated metal strip sheaths shall fulfil the requirements given in 5.1.1.
5.2.2 Minimum length
The length of the couplers shall be at least three times the nominal internal diameter of the sheaths, but not less than
150 mm.
5.2.3 Nominal internal diameter and wall thickness of the couplers
When measured in accordance with EN 524-1, the nominal internal diameter of the couplers d shall not exceed a
1,c
value of
d = d + 8 t + c (for interlocked sheaths)
1,c 1,s s
d = d + 3 t + c (for welded sheaths)
1,c 1,s s
where (see also Figure 1)
d is the nominal internal diameter of the sheath (in mm)
1,s
t is the nominal wall thickness of the sheath (in mm)
s
c is the clearance between the outer surface of the sheath and the inner surface of the coupler, taking into
account the increase due to folds or seams (in mm)
Key
1 Sheath
2 Coupler
Figure 1 — Dimensions of couplers
The clearance, c, shall not exceed 2,0 mm for sheaths with an internal diameter of up to 55 mm or 3,0 mm for larger
diameters.
The steel strips from which couplers are made shall at least fulfil the minimum requirements concerning the wall
thickness as the sheaths which are to be connected (see Table 1, lines 1a to 1b).
5.3 Stiffeners
It shall be possible to strengthen locally those sheaths which do not possess the increased lateral load resistance
specified in Table 1, line 4b. The size of the stiffeners shall not exceed half the circumference of the sheath and shall
be designed such that, after concreting, no cavities remain between the sheath and the stiffener which could have
6
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EN 523:2003 (E)
detrimental effects. This requirement can be met for instance by using the same profile and at least the same wall
thickness for stiffener and sheath.
The length of the stiffeners shall not exceed 1,5 times the nominal internal diameter of the sheaths or 10 cm,
whichever is the greater.
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‡‡
£
£
EN 523:2003 (E)
Table 1 — Minimum requirements
1 2 345 67 89 10 11
Characteristic Category Nominal internal diameter d in mm
1
over 25 over 35 over 45 over 55 over 65 over 75 over 85 over 100
25
to 35 to 45 to 55 to 65 to 75 to 85 to 100 to 130
1a Nominal thickness of steel strip 1 0,20 0,25 0,25 0,30 0,30 0,35 0,35 0,40
0,40
in mm
1b 2 — — 0,40 0,45 0,45 0,50 0,50 0,60
0,60
2 Relative load F /d in N/mm 2 3,0 3,5 4,0 4,0 4,5 5,0 5,5 6,0 6,5
pl 1
3a Radius r for the flexibility test, 1 750 750 750 750 750 750 750 900 1 000
in mm (maximum values)
3b 2 1 500 1 500 1 500 1 500 1 500 1 500 1 500 1 800 1 800
Lateral load F
4a without 1 500 600 750 750 950 950 950 1 050 1 050
1
in N stiffeners
4b with 1 1 500 1 500 1 500 1 500 1 500 1 500 1 500 1 500 1 500
stiffeners
4c without 2 1 500 1 500 1 500 1 500 1 500 1 500 1 500 1 500 1 500
stiffeners
5 Tensile load F 1 and 2 250 400 600 900 1 100 1 400 1 600 1 900 2 200
2
in N
6 Tightness 1 and 2 Water loss 1,5 % by volume
8
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EN 523:2003 (E)
6 Technical documents, delivery ticket, marking and labelling
6.1 Technical documents
Technical documents shall be prepared by the producer in which the following information shall be given for both
sheaths and the corresponding couplers:
mark or trademark;
dimensions and tolerances;
nominal thickness of the steel strip;
sketch of the shape of the profile;
relative volume of the profile;
Flexural behaviour F ;
p2
nominal weight;
chosen radius for the bending test;
lateral load (with and without stiffeners);
type, shape and dimensions of stiffeners required for the sheaths to fulfil the requirements given in Table 1,
line 4 (if relevant).
6.2 Delivery ticket
The following information shall be given on the delivery ticket and shall correspond to that given in the technical
documents:
name of producer;
producer's mark;
number of this European Standard, EN 523;
nominal internal diameter, classification, type;
type of sheath (see 3.1);
classification of sheath (see clause 4);
nominal internal diameter.
In the case of couplers and stiffeners, reference shall be made to the sheaths with which they are to be used.
6.3 Marking and labelling
6.3.1 General
When sheaths are supplied a clear marking with the relevant information shall be affixed on each packing unit,
transport bundle or on the sheaths themselves.
The marking shall include the producers mark or trademark, the re
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