ISO 16172:2006

Continuous hot-dip metallic-coated steel sheet for corrugated steel pipe

ISO 16172:2006 specifies the requirements for steel sheet used in the manufacture of corrugated steel pipe for storm sewers, culverts, drains, and similar uses. The sheet is metallic coated by the continuous hot-dip process.

Tôles en acier revêtues en continu par immersion à chaud pour tuyaux d'acier strié

General Information

• Status: Withdrawn
• Publication Date: 29-Oct-2006
• Withdrawal Date: 29-Oct-2006
• ICS: 77.140.50 - Flat steel products and semi-products
• Technical Committee: ISO/TC 17/SC 12 - Continuous mill flat rolled products
• Drafting Committee: ISO/TC 17/SC 12 - Continuous mill flat rolled products
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 28-Oct-2011

Relations

• Revised: ISO 16172:2011 - Continuous hot-dip metallic-coated steel sheet for corrugated steel pipe
• Effective Date: 19-Dec-2009

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 16172
First edition
2006-11-15

Continuous hot-dip metallic-coated steel
sheet for corrugated steel pipe
Tôles en acier revêtues en continu par immersion à chaud pour tuyaux
d'acier strié




Reference number
ISO 16172:2006(E)
©
ISO 2006

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ISO 16172:2006(E)
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ISO 16172:2006(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16172 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill
flat rolled products.

© ISO 2006 – All rights reserved iii

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INTERNATIONAL STANDARD ISO 16172:2006(E)

Continuous hot-dip metallic-coated steel sheet for corrugated
steel pipe
1 Scope
This International Standard specifies the requirements for steel sheet used in the manufacture of corrugated
steel pipe for storm sewers, culverts, drains, and similar uses.
The sheet is metallic coated by the continous hot-dip process.
Many metallic coated materials are covered in this International Standard. Users must determine which
product best serves their needs. Four different metallic coatings are included:
⎯ zinc coated;
⎯ zinc-5 % aluminum-mischmetal alloy coating;
⎯ 55 % aluminum-zinc alloy coated;
⎯ Al-Si alloy coated.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 1460, Metallic coatings — Hot dip galvanized coatings on ferrous materials — Gravimetric determination
of the mass per unit area
ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic
method
ISO 3497, Metallic coatings — Measurement of coating thickness — X-ray spectrometric methods
ISO 6892:1998, Metallic materials — Tensile testing at ambient temperature
ISO 16163, Continuously hot-dipped coated steel sheet products — Dimensional and shape tolerances
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ISO 16172:2006(E)
3 Terms, definitions and abbreviations
For the purposes of this document, the following terms, definitions and abbreviations apply.
3.1 Terms and definitions
3.1.1
fabricator
〈for corrugated metal pipe〉 the organization that produces the finished pipe
3.1.2
fabricator
〈for structural plate pipe〉 the organization that processes flat sheets and other items necessary for the field
assembly of finished products
3.1.3
manufacturer
〈for corrugated metal pipe〉 the organization that produces the metal sheet from which pipe is made
3.1.4
purchaser
〈for corrugated metal pipe〉 the person or agency that purchases the finished pipe
NOTE With regard to this International Standard for sheet for corrugated steel pipe, the fabricator may also be
considered as the purchaser of the sheet, where that term is used in this International Standard. Such an interpretation will
not restrict the purchaser of finished pipe from enforcing any provisions of this specification.
3.1.5
normal spangle coating
coating formed as a result of the unrestricted growth of aluminium alloy crystals during normal solidification of
the Zn-5Al-MM coating type
3.1.6
minimized spangle coating
a finer metallurgical coating formed as a result of treatment to restrict the formation of the normal coarse-grain
coating structure of the Zn-5Al-MM coating type
3.2 Abbreviations
Al-Si: aluminium-silicon alloy
55Al-Zn: 55 % aluminium-zinc alloy
Zn: zinc
Zn-5Al-MM: zinc-5 % aluminium-mischmetal alloy
4 Requirements
4.1 Chemical composition
The chemical composition (heat analysis) of the base metal shall conform to the requirements of Table 1.
4.2 Mechanical properties
The metallic-coated sheet shall conform to the requirements listed in Table 2.
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ISO 16172:2006(E)
Table 1 — Chemical composition
Element Heat analysis Product analysis
Sulfur, max., % 0,05 0,06
Sum of carbon, manganese,
0,70 0,74
phosphorus, sulfur and silicon, max., %

a
Table 2 — Mechanical requirements (properties of flat sheet prior to fabrication)
b 2
310
Tensile strength , min., N/mm
b 2
230
Yield strength , min. N/mm
c
20
Elongation, in 50 mm , min., %
a 2
To determine conformance with this specification, round each value for tensile strength and yield strength to the nearest 1 N/mm
and each value for elongation to the nearest 1 %.
b
Yield strength and tensile strength are based on the thickness of the base metal. If tests are made after coating, determine the
base metal thickness after stripping the coating from the ends of the specimen contacting the grips of the tension-testing machine prior
to tensile testing.
c
The elongation requirement does not apply to material tested after corrugating.

5 Coating requirements
5.1 Coating mass
The coating mass shall comply with the requirements listed in Table 3. The coating mass is the total amount
of coating on both sides of the sheet, expressed in grams per square metre.
5.2 Coating adhesion
The adhesion of the coating shall be such that no peeling or flaking occurs while the coated sheet is being
corrugated and formed into pipe.
5.3 Surface treatment
A chemical treatment may be applied to the metallic-coated sheet to minimize the hazard of wet storage stain
during shipment and storage. However, the inhibiting characteristics of the treatment are limited and, if a
shipment is received wet, the material shall be used immediately or dried.
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ISO 16172:2006(E)
Table 3 — Coating mass requirements
Coating mass Equivalent coating thickness
a
Type
total, both sides total, both sides
Triple spot, average, min. Single spot, min. Triple spot, average, min. Single spot, min.
2 2
g/m g/m µm µm
Zn 610 550 86 78
Zn-5AI-MM 640 550 93 80
55AI-Zn 210 180 56 48
AI-Si 305 275 95 86

a
Coating thicknesses are approximate, for information only. Conversions are based on the following relationships: Zn coating:
2 2 2 2
1 g/m = 0,141 5 µm; Zn-5Al-MM: 1 g/m = 0,146 0 µm; 55Al-Zn coating: 1 g/m = 0,266 36 µm; Al-Si coating: 1 g/m = 0,331 28 µm.

6 Dimension and tolerances
6.1 Thickness
Sheet thickness shall conform to the dimensions specified in Table 4. The thickness of the sheet includes both
the base metal and the coating.
6.2 Length
Permissible variations in the length of cut-length sheets, both flat and corrugated, shall be in accordance with
ISO 16163.
6.3 Flat sheet
Permissible variations in the width and camber of flat material shall be in accordance with ISO 16163. The
flatness tolerances are given in Table 5.
6.4 Corrugated sheet
6.4.1 Corrugations shall form smooth continuous curves and tangents. The dimensions of the corrugated
sheet shall be in accordance with Table 6.
6.4.2 The covering width of corrugated sheet shall be in accordance with T
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