SIST EN 39:2002

Loose steel tubes for tube and coupler scaffolds - Technical delivery conditions

This European Standard specifies the requirements for non-alloy steel tubes for use with EN 74 couplers in the construction of falsework and working scaffolds.  It includes detailed requirements for marking to aid long term identification, for protective coating by reference to European and International Standards, and for inspection and testing.
NOTE 1: Tubes to this European Standard, which have a specified outside diameter of 48,3 mm and specified thickness of 3,2 mm or 4,0 mm, may also be used in conjunction with other sizes and grades of steel tubes for applications such as prefabricated scaffolds.
NOTE 2: The use of these tubes should be in accordance with appropriate International and national requirements, for example prEN 12811 and prEN 12812.

Stahlrohre für die Verwendung in Trag und Arbeitsgerüsten - Technische Lieferbedingungen

Diese Europäische Norm legt die Anforderungen an Rohre aus unlegiertem Stahl zum Einsatz in Trag- und Arbeitsgerüsten, die aus Einzelrohren mit Kupplungen nach EN 74 errichtet werden, fest. Die Rohre haben einen Durchmesser von 48,3 mm und eine Nennwanddicke von 3,2 oder 4,0 mm.

Tubes en acier pour structures en échafaudages a tubes et raccords - Conditions techniques de livraison

Le présent projet de norme européenne spécifie les prescriptions pour les tubes en acier non allié destinés à la construction d'échafaudages d'étaiement et de service en tubes et raccords, conformes à l'EN 74. Les tubes doivent avoir un diamètre de 48,3 mm et une épaisseur nominale de 3,2 mm ou 4,0 mm.

Jeklene cevi za gradbene odre - Tehnični dobavni pogoji

General Information

• Status: Published
• Publication Date: 31-Aug-2002
• ICS: 77.140.75 - Steel pipes and tubes for specific use
• ICS: 91.220 - Construction equipment
• Technical Committee: IFEK - Ferrous metals
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-2002
• Due Date: 01-Sep-2002
• Completion Date: 01-Sep-2002
• Directive: 2005-01-3626 - Uredba o zagotavljanju varnosti in zdravja pri delu na začasnih in premičnih gradbiščih
• Ref Project: EN 39:2001 - Loose steel tubes for tube and coupler scaffolds - Technical delivery conditions

Relations

• Replaces: SIST HD 1039:2000 - Steel tubes for falsework and working scaffolds - Requirements, tests
• Effective Date: 01-Sep-2002

Overview

EN 39:2001 - Loose steel tubes for tube and coupler scaffolds (CEN) defines technical delivery conditions for non‑alloy steel tubes used with EN 74 couplers in falsework and working scaffolds. The standard covers material grade, manufacture (seamless or welded), marking for long‑term identification, protective coating options, inspection documentation and mandatory tests. Typical scaffold tube sizes covered include an outside diameter of 48.3 mm with specified wall thicknesses 3.2 mm (type 3) and 4.0 mm (type 4); these may also be used with other tube sizes in prefabricated scaffolds.

Key topics and requirements

• Steel grade and manufacture
  • Non‑alloy quality steel (example grade: S235GT).
  • Steel shall be killed; tubes may be seamless or welded (unless purchaser specifies).
• Dimensions & tolerances
  • Specified OD 48.3 mm and wall thicknesses 3.2 mm / 4.0 mm (type 3 / type 4). Length types (standard, approximate, exact) and tolerances are specified.
• Mechanical and chemical properties
  • Yield and tensile requirements are given (maximum tensile strength up to 520 MPa).
  • Limits on chemical elements (Mn, P, S, Si ranges) are specified, with optional stricter Si limit.
• Coating and corrosion protection
  • Tubes are normally supplied galvanized unless purchaser specifies bare or painted. Coating requirements are referenced to EN/ISO coating standards (e.g., EN 10240, EN ISO 1461).
• Inspection & testing
  • Mandatory tests include tensile and, for welded tubes, a flattening test (EN 10233 referenced).
  • Inspection documents types follow EN 10204; specific inspection can be ordered as an option.
• Marking
  • Marking requirements for traceability (standard number, type, manufacturer) with a recommended impression depth of 0.2 mm (optional requirement).

Applications

• Intended for tube-and-coupler scaffolds, falsework and working scaffolds in construction.
• Suitable for prefabricated scaffolding systems and for use with EN 74 couplers.
• Use should follow applicable international and national requirements (for example, prEN 12811, prEN 12812 for scaffold performance and planning).

Who should use EN 39:2001

• Manufacturers and mills producing scaffolding tube
• Steel tube suppliers and distributors
• Scaffold contractors, temporary works engineers and procurement teams
• Inspection bodies and conformity assessors

Related standards

• EN 74 (couplers for scaffolding)
• EN 10204 (inspection documents)
• EN 10021, EN 10002‑1, EN 10233, EN 10240, EN ISO 1461
• prEN 12811, prEN 12812 (scaffolding performance/ design)

EN 39:2001 is a practical technical specification ensuring scaffolding tubes are manufactured, marked and tested for safe, traceable use in temporary works and scaffolding systems.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2002
1DGRPHãþD
SIST HD 1039:2000
-HNOHQHFHYL]DJUDGEHQHRGUH7HKQLþQLGREDYQLSRJRML
Loose steel tubes for tube and coupler scaffolds - Technical delivery conditions
Stahlrohre für die Verwendung in Trag und Arbeitsgerüsten - Technische
Lieferbedingungen
Tubes en acier pour structures en échafaudages a tubes et raccords - Conditions
techniques de livraison
Ta slovenski standard je istoveten z: EN 39:2001
ICS:
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
91.220 Gradbena oprema Construction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 39
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2001
ICS 77.140.75; 91.220 Supersedes HD 1039:1990
English version
Loose steel tubes for tube and coupler scaffolds - Technical
delivery conditions
Tubes libres en acier pour échafaudages à tubes et Systemunabhängige Stahlrohre für die Verwendung in
raccords - Conditions techniques de livraison Trag- und Arbeitsgerüsten - Technische Lieferbedingungen
This European Standard was approved by CEN on 18 January 2001.
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,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, 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
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 39:2001 E
worldwide for CEN national Members.

Page 2
Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions.5
4 Classification and designation .5
4.1 Classification.5
4.2 Designation.5
5 Information to be supplied by the purchaser.5
5.1 Mandatory Information .5
5.2 Options.5
5.3 Examples of ordering .6
6 Manufacturing process .6
6.1 Steelmaking process .6
6.2 Tube manufacture.6
7 Requirements .6
7.1 General.6
7.2 Chemical composition and mechanical properties.7
7.3 Appearance.7
7.4 Straightness .7
7.5 External weld bead and preparation of ends .7
7.6 Dimensions, mass and tolerances .8
8 Inspection .9
8.1 Type of inspection .9
8.2 Inspection documents.9
8.3 Summary of inspection and testing .10
9 Sampling.10
9.1 Frequency of tests .10
9.2 Preparation of samples and test pieces .11
10 Test methods.11
10.1 Tensile test .11
10.2 Flattening test.11
10.3 Visual examination.11
10.4 Dimensional inspection.12
11 Retests, sorting and reprocessing.12
12 Marking .12
13 Coating.12
Annexe A (informative) Values for design of structures.13
Bibliography .14

Page 3
Foreword
This European Standard has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings for
steel tubes ”, the secretariat of which is held by UNI, in conjunction with CEN/TC 53 “ Temporary works equipment ”
This European Standard replaces HD 1039:1990.
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 October 2001, and conflicting national standards shall be withdrawn at the latest by
October 2001.
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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.
This European Standard is derived with modifications from Harmonisation Document HD 1039 “Steel tubes for
falsework and working scaffolds -Requirements, tests”.
This European Standard cancels and replaces HD 1039:1990 “Steel tubes for falsework and working scaffolds -
Requirements, tests”.
The significant technical changes are:-

tubes will now be supplied galvanized unless an option for them to be supplied without a coating (bare) or
painted is specified.

all tubes are now required to be suitable for galvanising.

requirements for the coating, previously contained in Annexes A and B are now covered (in accordance
with CEN rules) by reference to European or International Standards and are not included in the text of this
standard.

tubes may only be manufactured using killed steel.
1)

the maximum tensile strength of the tubes has been increased to 520 MPa .

a maximum manganese content has been introduced and the sulphur and phosphorus contents reduced.

the mass tolerance for single tubes has been changed from - 8% to - 7,5%. The maximum single tube
mass tolerance and the mass tolerance for batches of tubes have been deleted from the standard (outside
diameter tolerances have not been changed).

length types, standard or approximate or exact, and tolerances on those length types are now specified.

a flattening test requirement has been introduced for welded tubes.

requirements for the type and content of inspection documents have been introduced for use when
inspection documentation is specified.

specific inspection is now permitted as an option with testing frequencies specified.

the depth of marking of at least 0,2 mm is now a recommendation with an option to specify it as a
requirement. The order of marking has changed slightly in order to preserve the separation of standard
number and thickness type.
Annex A is informative.
1) 1 MPa = 1 N/mm
Page 4
1 Scope
This European Standard specifies the requirements for non-alloy steel tubes for use with EN 74 couplers in the
construction of falsework and working scaffolds. It includes detailed requirements for marking to aid long term
identification, for protective coating by reference to European and International Standards, and for inspection and
testing.
NOTE 1: Tubes to this European Standard, which have a specified outside diameter of 48,3 mm and specified thickness of 3,2
mm or 4,0 mm, may also be used in conjunction with other sizes and grades of steel tubes for applications such as
prefabricated scaffolds.
NOTE 2: The use of these tubes should be in accordance with appropriate International and national requirements, for example
prEN12811 and prEN12812.
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 10002-1 Metallic materials - Tensile testing - Part 1: Method of test (at ambient temperature).
EN 10020 Definition and classification of grades of steel.
EN 10021 General technical delivery requirements for steel and iron products.
EN 10027-1 Designation systems for steel - Part 1: Steel names principal symbols.
EN 10027-2 Designation systems for steel - Part 2: Steel numbers.
EN 10204 Metallic products - Types of inspection documents (including amendment A1 :1995).
EN 10233 Metallic materials - Tube - Flattening test.
EN 10240 Internal and/or external protective coatings for steel tubes - Specification for hot dip galvanized
coatings applied in automatic plants.
EN ISO 377 Steel and steel products - Location and preparation of samples and test pieces for mechanical
testing.
EN ISO 1461 Hot dip galvanized coatings on fabricated iron and steel articles - Specification and test
methods.
EN ISO 2409 Paints and varnishes - Cross-cut test.
EN ISO 2566-1 Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels.
2)
prEN 10168 Iron and steel products - inspection documents contents – List of information and description.
2
prEN 10266 Steel tubes, fittings and structural hollow sections - Definitionsand symbols for use in product
standards.
ISO 4628-3 Paints and varnishes - Evaluation of degradation of paint coatings - Designation of intensity,
quantity and size of common types of defect – Part 3: Designation of degrees of rusting.
ISO 7253:1996 Paints and varnishes - Determination of resistance to neutral salt spray.
CR 10260 Designation system for steel - Additional symbols.

2
In preparation, until this document is published as a European standard, the corresponding national standard(s) should be
agreed at the time of enquiry and order

Page 5
3 Terms and definitions
For the purpose of this European standard the terms and definitions given in, EN 10020 (definition and classification
of steel) EN 10021 (Inspection and testing), EN 10204 (Inspection documents), prEN 10266 (Seamless and welded
tube) and the following, in addition to or instead of the definitions and symbols given in the above text, apply.
3.1
type 3 tube
tube of 3,2 mm specified wall thickness.
3.2
type 4 tube
tube of 4,0 mm specified wall thickness.
3.3
bare tube
tube whose surface is as manufactured without subsequent coating.
4 Classification and designation
4.1 Classification
In accordance with the classification system in EN10020, the steel in Table 1 is c
...