INTERNATIONAL ISO

STANDARD 12176-4

First edition
2003-11-01

Plastics pipes and fittings — Equipment

for fusion jointing polyethylene
systems —
Part 4:
Traceability coding
Tubes et raccords en matières plastiques — Appareillage pour
l'assemblage par soudage des systèmes en polyéthylène —
Partie 4: Codage de la traçabilité

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Reference number
ISO 12176-4:2003(E)

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Contents Page

Foreword ............................................................................................................................................................ iv
Introduction ........................................................................................................................................................ v
1 Scope...................................................................................................................................................... 1
2 Normative references ........................................................................................................................... 1
3 Terms and definitions........................................................................................................................... 2
4 Coding-system design.......................................................................................................................... 4
5 Encoding of data ................................................................................................................................... 6
6 Data carriers .......................................................................................................................................... 9
Annex A (informative) Content of traceability system.................................................................................. 11
Annex B (normative) Data carrier ................................................................................................................... 12
Bibliography ..................................................................................................................................................... 24

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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 12176-4 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.

ISO 12176 consists of the following parts, under the general title Plastics pipes and fittings — Equipment for
fusion jointing polyethylene systems:

 Part 1: Butt fusion

 Part 2: Electrofusion

 Part 3: Operator's badge

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 Part 4: Traceability coding

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ISO 12176-4:2003(E)

Introduction
Traceability in the construction and maintenance of a pipeline system is determined by the traceability of all
relevant information on the system.

A complete traceability system can be built up from the following elements: fusion-jointing equipment data,
fusion-jointing equipment operator data, site data (geographical location), data on fittings and pipes and
fusion-jointing parameters, installation dates and assembly procedures.

The aim of this document is solely to define a system for encoding the characteristics of the pipes, fittings,
fusion-jointing equipment, fusion-jointing equipment operators and fusion-jointing protocols. It is widely
acknowledged that similar encoding systems can be used to monitor other aspects and applications of
pipelines, relating to compatibility, for instance. Such systems may be subject to patent rights.

It is up to the user to create the link between the various elements in order to provide a complete traceability
system. Care is necessary when determining which data are to be downloaded into the traceability system
database and the minimum information to be stored in the database for later retrieval: the choice of data and
the amount of data will strongly influence the performance of the database when it is used later.

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 INTERNATIONAL STANDARD ISO 12176-4:2003(E)

Plastics pipes and fittings — Equipment for fusion jointing

polyethylene systems —
Part 4:
Traceability coding

1 Scope
This part of ISO 12176 specifies an encoding system for data on components, assembly methods and jointing
operations for polyethylene (PE) piping systems for gas supply, for use in a traceability system.

Reading of the codes can be carried out using alphanumeric or numeric data-recognition systems such as
bar-code, magnetic-stripe card or microchip card readers.

Other data-recognition systems conforming to ISO/TR 13950 may be used in association with one of the
specified recognition systems to obtain the required traceability.

This part of ISO 12176 is applicable to PE pipes, fittings and valves conforming to ISO standards for gas
supply piping systems and also to the assembly operation utilizing methods such as fusion using a heating
tool (butt, socket and saddle fusion), electrofusion (socket and saddle fusion), induction fusion and mechanical
jointing.

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 1133, Plastics — Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of
thermoplastics

ISO/IEC 7810:2003, Identification cards — Physical characteristics

ISO/IEC 7811-2:2001, Identification cards — Recording technique — Part 2: Magnetic stripe — Low coercivity

ISO/IEC 7811-4:1995, Identification cards — Recording technique — Part 4: Location of read-only magnetic
tracks — Tracks 1 and 2

ISO 8601:2000, Data elements and interchange formats — Information interchange — Representation of
dates and times

ISO 12176-3:2001 , Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems — Part 3:
Operator’s badge

ISO/TR 13950:1997, Plastics pipes and fittings — Automatic recognition systems for electrofusion

ISO/IEC 15417:2000, Information technology — Automatic identification and data capture techniques — Bar
code symbology specification — Code 128

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ISO/IEC 16390:1999, Information technology — Automatic identification and data capture techniques — Bar
code symbology specifications — Interleaved 2 of 5

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1
component
item built into a gas network as a part of the piping system, such as a pipe, elbow, T-piece, reducer, saddle,
socket fitting, valve or other element used for connecting pipes and/or accessories (e.g. electrofusion socket
fitting, mechanical fitting)

3.2
PE assembly
combination of polyethylene (PE) pipes, a PE pipe and a fitting, a pipe or a fitting and a saddle, a valve, or
another component, assembled by electrofusion, fusion using a heating tool, induction fusion or mechanical
compression

3.3
traceability
ability to create a trace of the history, the purpose or the location of information, by means of records

NOTE 1 The term “traceability” may have one of three main meanings.

a) In a product sense, it may relate to:

 the origin of materials and parts;

 the product processing history;

 the distribution and location of the product after delivery.

b) In a calibration sense, it relates measuring equipment to national or international standards, primary standards, basic
physical constants or properties, or reference materials.

c) In a data-collection sense, it relates calculations and data generated through the quality loop to a user's quality
requirements.

NOTE 2 Annex A gives an overview of the traceability system content with reference to relevant standards.

3.4
fusion joint made using a heating tool
joint made by heating the ends of two components, the surfaces of which match, by holding them against a
heating tool until the PE material reaches fusion temperature, removing the heating tool quickly and pushing
the two softened ends against one another, e.g. butt fusion joint, socket fusion joint or saddle fusion joint

3.5
electrofusion joint
joint made between a PE electrofusion socket or saddle fitting and a pipe or spigot end fitting, the jointing
surfaces being heated by a current flowing through a heating element incorporated in each jointing surface
(the Joule effect), causing the material adjacent to the heating elements to melt and the pipe and/or fitting
surfaces to fuse together

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3.6
mechanical joint
joint made by assembling a PE pipe with a fitting that generally includes a compression seal to ensure
pressure integrity, leaktightness and resistance to end loads

NOTE A support sleeve inserted into the pipe bore may be used to provide a permanent support for the PE pipe to
prevent creep in the pipe wall under radial compressive forces. The metallic part of the fitting can be jointed to a metal
pipe by screw threads, compression joints, welded or brazed flanges or other means.

3.7
induction fusion joint
joint made between PE pipes and/or socket or saddle fittings using induction fusion techniques, the jointing
surfaces being heated by a current flowing through a heating element incorporated in each jointing surface
(the Joule effect), causing the material adjacent to the heating elements to melt and the pipe and/or fitting
surfaces to fuse together

NOTE The heat energy supply source is an induction coil fitted in a manner designed to generate and transmit the
heat flux necessary for melting to take place at the PE/PE interface.

3.8
fusion-jointing equipment operator

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person trained and authorized to carry out fusion jointing between PE pipes and/or fittings based on a written
procedure agreed by the pipeline operator

NOTE The operator may be trained and authorized to carry out one or more fusion-jointing procedures, involving the
operation of manual and/or automatic fusion-jointing equipment.

3.9
fusion-jointing record
record including information and data related to the fusion-jointing equipment, the fusion-jointing operation and
traceability

3.10
digit
integer from zero to nine

3.11
character
integer from zero to nine or letter or other symbol

NOTE Letters and other symbols are represented by a two-digit number as given in Table B.1.

3.12
virgin material
thermoplastics material in a form such as granules or powder which has not been previously processed other
than for compounding and to which no reprocessable or recycled materials have been added

3.13
reprocessable material
thermoplastics material prepared from clean unused rejected pipes, fittings or valves, produced in a
manufacturer’s plant by a process such as injection-moulding or extrusion, which will be reprocessed in the
same plant

NOTE Such material may include trimmings from the production of such pipes, fittings and valves.

3.14
standard dimension ratio
SDR
numerical designation of a pipe series, which is a convenient round number approximately equal to the ratio of
the nominal outside diameter dn to the nominal wall thickness en

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3.15
melt mass-flow rate
MFR
value relating to the viscosity of a molten thermoplastic material when extruded at a specified temperature and
load, expressed in grams per 10 min (g/10 min)

4 Coding-system design

4.1 General format

The encoding system is based on data to be provided by the component manufacturer(s)/supplier(s), the
fusion-jointing equipment manufacturer and the fusion-jointing equipment operator. If the data are encoded in
e.g. a bar code, a magnetic stripe or a microchip, they shall consist of a specified number of characters, i.e.
the encoding system shall not be shortened.

The data are divided into different classes:

a) fusion-jointing equipment data;

b) traceability data:

 component data,

 component assembly operation data,

 joint identification data;

c) fusion-jointing operation data.

The data file shall contain at least the fusion-jointing equipment data and the traceability data.

4.2 Data description

4.2.1 Fusion-jointing equipment data

The length of the code used for the identification of the fusion-jointing equipment shall conform to the
requirements of Table 1. These data shall be suitable for downloading into the traceability system database.

Table 1 — Fusion-jointing equipment data

Number of alphanumeric
Data
characters

Fusion-jointing equipment manufacturer a 2

Fusion-jointing unit number 7
a In the first position.

NOTE Information related to maintenance of the fusion-jointing equipment may be included as fusion-jointing
operation status data or in the form of optional data.

The system for encoding fusion-jointing equipment data shall conform to 5.1.
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4.2.2 Traceability data

4.2.2.1 General

Traceability data for a PE assembly are given by the traceability data for the different components in the
assembly and the traceability data for the assembly operation.

The system for encoding traceability data shall conform to 5.2 and 5.3.

To allow assessment of the effectiveness of the traceability system in operation, provision shall be made for
the following information to be downloaded and stored:

a) the size and type of component(s) identified by the system as having been installed;

b) the manufacturer/supplier of the component(s).

4.2.2.2 Component data

Encoded information for components shall conform to the requirements of Table 2. These data shall be
suitable for downloading into the database of the traceability system.

Table 2 — Component data

Data Number of digits

Component manufacturer/supplier 4
Component type 2
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Component diameter(s) 3/10 a

Component production batch 8b
Applicable pipe series (SDR) 1
Identification of PE compound 7c
a Three digits for a bar code, 10 digits for a magnetic stripe.
b Including two digits for the production site.
c Including:
— one digit for the type of material;
— one digit for the designation of the PE;
— one digit for the MFR.

4.2.2.3 Assembly operation and joint identification data

Encoded information on the assembly operation and joint identification shall conform to the requirements of
Table 3. These data shall be suitable for downloading into the traceability system database.

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Table 3 — Assembly operation and joint identification data

Number of alphanumeric
Data
characters

Type of jointing method 1

Assembly procedure 1
Status of fusion-jointing operation 2
Date of assembly 6
Time of assembly 4
Clamping 1
Scraping 1
Ambient temperature

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+ or – 1
value 3
unit (°C, °F) 1
Jointing-equipment operator 6
Country which issued operator's badge 3
Organization which issued operator's badge 2
Job number/location 16

4.2.3 Fusion-jointing operation data

Information related to the fusion-jointing operation (e.g. complete butt fusion graph, details of voltage and
current during the electrofusion-jointing operation) shall be defined in accordance with the user's requirements.
These data shall be suitable for downloading into the traceability system database.

The level of detail of information related to the fusion-jointing operation directly influences the total amount of
data contained in a fusion-jointing cycle record and therefore the number of cycles that can be stored in the
memory of a fusion-jointing unit.

5 Encoding of data

5.1 Encoding of fusion-jointing equipment data

The fusion-jointing equipment shall be identified by a unique code, composed of nine alphanumeric characters.
This code shall be given by the manufacturer of the fusion-jointing equipment in accordance with the relevant
ISO standards. The first two characters shall identify the manufacturer of the fusion-jointing equipment.

5.2 Encoding of component data

5.2.1 Identification of component manufacturer/supplier

Each component manufacturer/supplier shall be identified by one or more codes which can be used only by
this component manufacturer/supplier. These codes shall be as given by the relevant list available on the web
site <http://www.traccoding.com>.

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5.2.2 Identification of component type

Each type of component shall be identified by two numeric characters as given by the relevant list available on
the web site <http://www.traccoding.com>. Table B.4 gives an overview of the most important components.
The list is limited to 49 components. Code-numbers are reserved for additional information and these will be
activated by the webmaster of the web site <http://www.traccoding.com> as and when necessary.

5.2.3 Identification of component diameter(s)

If required, the component diameter(s) shall be identified by a code expressed as specified in B.1.2.4.

With magnetic-stripe cards, the diameter(s) are not encoded (see Clause B.2).

5.2.4 Identification of production batch

The production batch shall be identified by a production batch number, composed of six numeric characters,
plus an additional two numeric characters to identify the production site.

The production batch/site code shall be as given by the component manufacturer and shall define the
production batch in a unique way. This code can be freely defined by the manufacturer. It gives access to all
production batch data, e.g. production date, date of batch release testing.

The code shall be unique in relation to the other data given in Table 2 [component type, component
diameter(s), applicable pipe series (SDR), identification of PE compound] for a period of at least 10 years.

5.2.5 Identification of SDR

The SDR of pipes and the applicable pipe series for fittings, as marked on the components, shall be identified
by a code as specified in Table 4.

Table 4 — SDR codes

SDR Code

> 33 0
33 1
26 2
21 3
17,6 4
17 5
13,6 6
11 7
9 8
<9 9

5.2.6 Identification of PE compound

The PE compound shall be identified by a unique code. This code will be managed through the web site
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<http://www.traccoding.com> where the current list will be available.

Any request for inclusion of a new code will be dealt with directly through the web site by allocating a unique
code generated automatically using the next number available.

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The use of reprocessable material shall be indicated by a single-digit code as specified in Table B.8.

The designation of the PE compound shall be identified by a single-digit code as specified in Table B.9.

The MFR of the PE compound shall be identified by a single-digit code as specified in Table B.10.

5.3 Encoding of assembly operation and joint identification data

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5.3.1 General

Encoded information is stored in the memory of the fusion-jointing unit for each cycle. This information shall
be suitable for downloading into the traceability system database.

5.3.2 Identification of type of jointing method

The type of jointing method used shall be identified by a code, composed of one numeric character, as
specified in Table 5.

Table 5 — Codes for types of jointing method

Type of jointing method Code

Fusion joint made using heating tool:

Butt fusion jointing 1
Socket fusion jointing 2
Saddle fusion jointing 3
Electrofusion jointing 4
Mechanical jointing 5
Induction fusion jointing 6

5.3.3 Identification of assembly procedure

The assembly procedure used shall be identified by a code composed of one alphanumeric character. This
code shall be as given by the manufacturer of the fusion-jointing equipment and shall be explained in the
operating instructions.

5.3.4 Indication of result of fusion operation

The result of the fusion operation (e.g. OK/not OK) shall be indicated by a code composed of two
alphanumeric characters. This code shall be as given by the manufacturer of the fusion-jointing equipment
and shall be explained in the operating instructions.

5.3.5 Indication of date and time of assembly

The date and time of assembly of the joint shall be indicated by a code composed of 10 numeric characters,
six for the date and four for the time in accordance with ISO 8601.

5.3.6 Indication of use of clamping

The use of clamping shall be indicated by a code composed of one alphanumeric character. This code shall
be as given by the manufacturer of the fusion-jointing equipment and shall be explained in the operating
instructions.

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5.3.7 Indication of use of scraping

The use of scraping shall be indicated by a code composed of one alphanumeric character. This code shall be
as given by the manufacturer of the fusion-jointing equipment and shall be explained in the operating
instructions.

5.3.8 Indication of ambient temperature

The ambient temperature during assembly shall be indicated by a code including a symbol (+ or −) indicating
whether the temperature is above or below freezing, three numeric characters indicating the temperature and
a single alphanumeric character indicating the temperature scale (°C or °F) (see Table 3). This code shall be
as given by the manufacturer of the fusion-jointing equipment and shall be explained in the operating
instructions.

5.3.9 Identification of the fusion-equipment operator

The fusion-equipment operator responsible for assembly shall be identified by a code composed of six
numeric characters as specified in ISO 12176-3.

5.3.10 Identification of country

The country where the fusion-equipment operator's badge was issued shall be identified by a code composed
of three numeric characters as specified in ISO 12176-3.

5.3.11 Identification of competent organization

The organization that issued the badge shall be identified by a code composed of two alphanumeric
characters as specified in ISO 12176-3.

5.3.12 Identification of job number and location

The job number and location shall be identified by a code defined by the gas distributor. The length shall be
limited to 16 alphanumeric characters.

6 Data carriers

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6.1 General

A traceability system can be built up by manual input of the traceability information or by automatic input of
that information or by a combination of the two.

In the case of automatic input, the component traceability information shall be made available on a
standardized data carrier, such as a bar-code card, magnetic-stripe card or microchip card, delivered with the
components. The traceability information stored in the fusion-jointing equipment (e.g. identification number of
the equipment, fusion-jointing cycle data) shall be made available by downloading from the fusion-jointing
equipment.

Two encoding systems, type 1 and type 2, are defined in this part of ISO 12176 and are detailed in Annex B.
The two encoding systems are managed by the webmaster of the web site <http://www.traccoding.com>.

The type 1 encoding system will run until such time that 75 % of the system capacity has been used for
manufacturers/suppliers of components and/or compounds (monitored through the web site). At this time, the
type 2 encoding system will be activated without the loss of the type 1 encoding-system data.

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6.2 Bar-code card

If the traceability information is encoded as a bar code, the bar code shall be of the Code 128, code character
set C, type as defined in ISO/IEC 15417, allowing the use of double-density numeric characters with a total
length of 40 digits for pipes and 26 digits for other components. For printing the bar code, a standard
resolution shall be chosen with a bar thickness of 0,19 mm (narrowest bar).

If the fusion-jointing parameters for an electrofusion fitting are provided on a bar-code card, the encoding
system shall be of the “2 of 5 interleaved” type as specified in ISO/TR 13950 and defined in ISO/IEC 16390.

NOTE This means that the electrofusion fitting will carry two bar codes, one for the fusion parameters
(2/5 interleaved) and a second one for the traceability data (Code 128).

6.3 Magnetic-stripe card

The traceability information can be stored on a card with a magnetic-stripe data carrier.

The magnetic-stripe card shall conform to the requirements for ID-1 given in ISO/IEC 7810. The
characteristics of the magnetic stripe shall conform to ISO/IEC 7811-2 and ISO/IEC 7811-4. The data shall be
stored on track 1.

The card shall not contain physically embossed characters.

6.4 Microchip card

The microchip coding shall contain the same data and in the same order as the bar code.

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Annex A
(informative)

Content of traceability system

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The basic content of a traceability system is given in Table A.1.

Table A.1 — Content of traceability system

Traceability coding Relevant standards

Pipes ISO 4437

Fusion-jointing fittings ISO 8085-1, ISO 8085-2, ISO 8085-3
Manufacturer Components
Mechanical fittings ISO 10838-1, ISO 10838-2, ISO 10838-3
Valves ISO 10933
Fusion-jointing equipment ISO 12176-1, ISO 12176-2
User Fusion-jointing equipment operator ISO 12176-3
Code of practice ISO/TS 10839

Gas distributor Relevant specifications

User Geographical location User specifications

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Annex B
(normative)

Data carrier

B.1 Bar-code card

B.1.1 Format description

The format shall be a bar code with 26 or 40 digits taken from Code 128, character set C. This is a four-level
full-ASCII code. The width of a module is fixed at 0,19 mm for the narrowest bar.

The following general format shall be used:

Start character
Body of message Stop character
Code C Physical checksum
40 or 26 digits Value 106
Value 105

B.1.2 Body of message

B.1.2.1 General

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The traceability information shall be made available in accordance with the following two encoding structures:

 a structure for encoding data on pipes, with a total length of 40 digits;

 a structure for encoding data on other components listed in Table B.4, with a total length of 26 digits.

Information shall be stored in the order given in B.1.3 or B.1.4, as applicable, without any spaces between
data elements.

The character codes shall be as specified in Table B.1.

Table B.1 — Basic alphabet code

Basic alphabet code

A = 01 F = 06 K = 11 P = 16 U = 21 Z = 26
B = 02 G = 07 L = 12 Q = 17 V = 22 + = 27
C = 03 H = 08 M = 13 R = 18 W = 23 □ = 28
D = 04 I = 09 N = 14 S = 19 X = 24 ■ = 29
E = 05 J = 10 O = 15 T = 20 Y = 25

The content of each digit shall be as specified in B.1.2.2 to B.1.2.13.

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B.1.2.2 Digits 1 to 4 — Component manufacturer (name/trade mark)

B.1.2.2.1 Type 1 encoding system

With the type 1 encoding system, the code, composed of two alphabetical characters, shall be as given in the
relevant list available on the web site <http://www.traccoding.com>.

Component diameter information is added to digit 1. The offset value shall be as specified in Table B.2.

Table B.2 — Offset for component diameter information

Component diameter information Offset

Two diameters in accordance with Table B.7 +0

One diameter expressed in millimetres +3
One diameter expressed in centimetres +6

Checksum information is added to digit 3. The offset value shall be as specified in Table B.3.

Table B.3 — Offset for checksum information

Checksum information Offset

Without checksum +0
With checksum calculated by Modulo 10 (digit 26) +3

B.1.2.2.2 Type 2 encoding system

With the type 2 encoding system, the code shall be composed of four numeric characters as given by the
relevant list available on the web site <http://www.traccoding.com>.

Any request for registering a new code will be dealt with directly through the web site by allocating a unique
code generated automatically using the next number available.

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 ISO 12176-4:2003(E)

B.1.2.3 Digits 5 and 6 — Type of component

The component code shall be as specified in Table B.4.

Table B.4 — Component codes

Component Code

Pipe, straight 01
Pipe, coiled 02
Socket 03
Tapping saddle 04
Branching saddle 05
Elbow, 90° 06
Elbow, 45° 07
Elbow, undefined 08
Tee 09
End cap 10
Reducer 11
Swept bend 12
Flange adapter 13
Mechanical fitting 14
PE-body valve, quarter-turn (QT) 15
PE-body valve, multi-turn (MT) 16
Non-PE-body valve, QT 17
Non-PE-body valve, MT 18

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Repair fitting 19
Transition fitting 20
Wall channel, rigid 21
Wall channel, flexible 22
Pressure tapping valve 23
Ventilation end cap 24
Stop-off saddle 25
Cap for tapping saddle 26
PE/steel transition fitting 27
PE/brass transition fitting 28
Excess-flow valve 29

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 ISO 12176-4:2003(E)

In digit 5, an offset allows differentiation between the type 1 and type 2 encoding systems. The offset value
shall be as specified in Table B.5.

Table B.5 — Offset for differentiation between type 1 and type 2

Type of encoding system Offset

Type 1 +0
Type 2 +5

B.1.2.4 Digits 7 to 9 — Component diameter(s)

B.1.2.4.1 General

Diameters shall be represented by three digits.

Diameters shall be expressed in one of the following ways:

 two diameters, encoded in accordance with B.1.2.4.2;

 one diameter given directly in millimetres (i.e. not encoded);

 one diameter given directly in inches (i.e. not encoded).

B.1.2.4.2 Encoding system for diameters

IMPORTANT — When a diameter is encoded, two diameters are always used. The same diameter is
used for both sockets and pipes in the calculation.

To calculate the value D of the code, use the following factors:

 factor C1 for the first diameter D1,

 factor C2 for the second diameter D2,

where C1 and C2 are as specified in Table B.6.

For dimensions given in millimetres, take D1 as the larger of the two diameters, i.e. D1 W D2 (where D1 = D2
corresponds to the case when there is only one diameter). D then is given by Equation (1).

D = (C1 × 31) + C2 (1)

For dimensions given in inches, take D2 as the larger of the two diameters, i.e. D2 W D1 (where D2 = D1
corresponds to the case when there is only one diameter). D is then given by Equation (2).

D = (C1 × 31) + C2 + 1 (2)

In the case of pipe or socket diameters (same diameter) expressed in inches, the diameter can also be
encoded directly as 001 in to 031 in.

The calculated values of D for all pipe and fitting diameters are given in Table B.7.

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Table B.6 — Factors used in encoding diameters

D1 or D2 D1 or D2 D1 or D2
Factor C1 or C2
mm inch CTS a inch IPS b
16 1/2 01
20 1 02
25 1 1/4 03
32 04
40 05
50 06
63 07
75 08
90 09
110 10
125 1/2 11
140 3/4 12
160 1 13
180 1 1/4 14
200 1 1/2 15
225 2 16
250 3 17
280 4 18
315 6 19
355 8 20
400 10 21

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450 11 22
500 12 23
560 13 24
630 14 25
710 26
800 27
900 28
1 000 29
1 200 30
W 1 400 31
a CTS = Copper tubing system
b IPS = Iron pipe system

EXAMPLES

For 1/2 in CTS, D = (31 × 1) + 1 + 1 = 033

For 200 mm × 200 mm, D = (31 × 15) + 15 = 480

For 2 in × 1/2 in IPS, D = (31 × 11) + 16 + 1 = 358

For 90 mm × 63 mm, D = (31 × 9) + 7 = 286

For 21 in IPS, D = 021

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 Table B.7 — Calculated values of codes for diameters

Provided by IHS under license with ISO

Calculation: (C1 ¥ 31) + C2 + 1 with D2 W D1; C1 = 1, 2 and 3 = CTS; C1 = 11, 12, ... 25 = IPS Inch sizes
C2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 C2
C1 D1 D2 1/2″ 1″ 1 1/4″ CTS IPS 1/2″ 3/4″ 1″ 1 1/4″ 1 1/2″ 2″ 3″ 4″ 6″ 8″ 10″ 11″ 12″ 13″ 14″ D1 C1

Copyright International Organization for Standardization

1 16 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 1/2″ 1
2 20 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 1″ 2

No reproduction or networking permitted without license from IHS

3 25 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 1 1/4″ 3
4 32 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 CTS 4

© ISO 2003 — All rights reserved

5 40 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 5
6 50 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 6
7 63 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 7
8 75 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 8
9 90 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 9
10 110 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 IPS 10
11 125 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 1/2″ 11
12 140 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 3/4″ 12
13 160 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 1″ 13
14 180 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 1 1/4″ 14
15 200 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 1 1/2″ 15
16 225 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 2″ 16

Not for Resale

17 250 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 3″ 17
18 280 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 4″ 18
19 315 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 6″ 19
20 355 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 8″ 20
21 400 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 10″ 21
22 450 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 11″ 22
23 500 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 12″ 23
24 560 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 13″ 24
25 630 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 14″ 25
26 710 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 26
27 800 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 27
28 900 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 28
29 1000 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 29
30 1200 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 30
C1 W1400 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 D1 C1
D2 16 20 25 32 40 50 63 75 90 110 125 140 160 180 200 225 250 280 315 355 400 450 500 560 630 710 800 900 1000 1200 W1400 D2
C2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 C2

Calculation: (C1 ¥ 31) + C2 with D1 W D2 Metric sizes

17
ISO 12176-4:2003(E)

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 ISO 12176-4:2003(E)

B.1.2.5 Digits 10 to 15 — Production batch number

The production batch number shall be as given by the component manufacturer/supplier (see 5.2.4).

B.1.2.6 Digits 16 and 17 — Production site

The production site code shall be as defined by the component manufacturer (see 5.2.4).

B.1.2.7 Digit 18 — SDR

The code for the applicable pipe series SDR shall be as specified in Table 4.

B.1.2.8 Digits 19 to 22 — PE compound

With the type 1 encoding system, the code shall be composed of one alphabetical character and two numeric
characters as given by the relevant list available on the web site <http://www.traccoding.com>.

With the type 2 encoding system, the code shall be composed of four numeric characters as given by the
relevant list available on the web site <http://www.traccoding.com>.

B.1.2.9 Digit 23 — Type of material

The use of reprocessable material shall be identified by a code as specified in Table B.8.

Table B.8 — Codes for type of material

Type of material Code

Virgin material 0
100 % reprocessable material 1
Virgin + reprocessable material 2

With the type 2 encoding system, information on the diameter(s) is added to digit 23. The offset value shall be
as specified in Table B.2.

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B.1.2.10 Digit 24 — PE designation

The code for the PE designation (MRS classification) shall be as specified in Table B.9.

Table B.9 — PE designation codes

PE designation Code

Not used 0
PE 63 1
PE 80 2
PE 100 3
Reserved for future use 4
Reserved for future use 5
Reserved for future use 6
Reserved for future use 7
Reserved for future use 8
Reserved for future use 9

B.1.2.11 Digit 25 — MFR

The value of the MFR declared by the compound manufacturer/supplier, determined in accordance with
ISO 1133 at a load of 21,6 kg and a temperature of 190 °C, shall be encoded in accordance with Table B.10.

Table B.10 — MFR codes

MFR
Code
g/10 min
MFR value not specified a 0
MFR u 5 1
5 < MFR u 7 2
7 < MFR u 10 3
10 < MFR u 15 4
15 < MFR u 20 5
20 < MFR u 25 6
25 < MFR u 32 7
32 < MFR u 40 8
MFR > 40 9
a E.g. for electrofusion jointing.

B.1.2.12 Digit 26 — Control character (checksum)

The control character (checksum) is optional for the type 1 encoding system.

The control character (checksum) is mandatory for the type 2 encoding system.

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 ISO 12176-4:2003(E)

The value of the control character shall be calculated

 for pipes: from all digits from 1 to 40, except digit 26;

 for other components: from all digits from 1 to 25.

Calculate the value of the control character in accordance with Clause A.9 of ISO/TR 13950:1997, as follows:

1 Add the numerical values of the odd positions in the message read from left to right, and multiply the
total by 3.

2 Add the numerical values of the even positions in the message read from left to right.

3 Add the odd and even totals obtained in stage 1 and stage 2.

4 Determine the smallest number which, when added to the sum obtained in stage 3, produces a
multiple of 10.
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5 This number is then the control character value, and shall be placed in the 26th position in the
message read from left to right.

B.1.2.13 Digits 27 to 40 – Additional information on pipes

Digits 27 to 36 are available for additional information required by the gas distributor (e.g. raw material batch
number).

Digits 37 to 40 are available for further information (e.g. length of piping), if required by the gas distributor.

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 ISO 12176-4:2003(E)

B.1.3 Bar-code structure for pipes

The bar-code structure shall be as specified in Table B.11. When the information is not required, zeros shall
be inserted in the empty spaces.
Table B.11 — 40-digit bar-code structure
Digit Type 1 encoding system Type 2 encoding system
Source Information
number Offset Example Offset Example
1 + 0, + 3, + 6 a 0 — 9
AL
2 Name of — 1 — 0
List on web site Two diameters 9052
3 manufacturer/supplier + 0, + 3 b 1 encoded — 5
4 — 2 — 2
5 +0c 0 +5c 5
Table B.4 Type of pipe Straight pipe Coiled pipe
6 — 1 — 2
7 — 4 200 mm — 1
Table B.7, if
8 Diameter of pipe — 8 × — 6 160 mm
applicable
9 — 0 200 mm — 0
10 — 1 — 1
11 — 2 — 2
12 — 3 Batch No. — 3 Batch No.

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Production batch number
13 Component — 4 123456 — 4 123456
14 manufacturer/supplier — 5 — 5
15 — 6 — 6
16 — 1 — 1
Production site Site 12 Site 12
17 — 2 — 2
18 Table 4 SDR value — 7 SDR 11 — 4 SDR 17,6
19 — 0 — 0
20 — 1 — 1
List on web site PE compound A01 0101
21 — 0 — 0
22 — 1 — 1
23 Table B.8 Type of material — 0 Virgin material + 0, + 3, + 6 d 4 e

24 Table B.9 PE designation — 2 PE 80 — 3 PE 100

25 Table B.10 MFR — 5 15 < MFR u 20 — 4 10 < MFR u 15
Digits 1 to 40, f
26 Control character — 0 — — 1
except 26
27 — 0 — 0
28 — 0 — 0
29 — 7 — 0
30 — 1 — 0
31 Gas distributor's — 3 Batch No. — 0
Additional information Batch No. 120
32 specifications — 5 713532J — 0
33 — 3 — 0
34 — 2 — 1
35 — 1 — 2
36 — 0 — 0
37 — 0 — 0
38 — 0 — 1 Length of
Gas distributor's
Additional information piping
39 specifications — 0 — 2 240 m
40 — 0 — 0
a For component diameter information with the type 1 encoding system, as specified in Table B.2.
b For checksum information, as specified in Table B.3.
c To differentiate between type 1 and type 2, as specified in Table B.5.
d For component diameter information in the type 2 encoding system, as specified in Table B.2.
e 1 (100 % reprocessable material) + 3 (one diameter, expressed in millimetres).
f Calculated in accordance with Clause A.9 of ISO/TR 13950:1997:
10 – [(9+5+5+1+0+2+4+6+2+0+0+4+4+0+0+0+0+2+0+2) × 3 + (0+2+2+6+1+3+5+1+4+1+1+3+0+0+0+1+0+1+0)]10 = 1

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 ISO 12176-4:2003(E)

B.1.4 Bar-code structure for other components

The bar-code structure shall be as specified in Table B.12. When the information is not required, zeros shall
be inserted in the empty spaces.
Table B.12 — 26-digit bar-code structure

Digit Type 1 encoding system Type 2 encoding system

Source Information
number Offset Example Offset Example

1 + 0, + 3, + 6 a 0 — 9
AL
2 Name of — 1 — 0
List on web site Two diameters 9052
3 manufacturer/supplier + 0, + 3 b 1 — 5
encoded
4 — 2 — 2

5 +0c 1 +5 c 5
Table B.4 Type of component Reducer Socket
6 — 1 — 3
7 — 4 — 1
160 mm
Table B.7,
8 Component diameter(s) — 1 × — 6 160 mm
if applicable
125 mm
9 — 4 — 0
10 — 1 — 1
11 — 2 — 2
12 — 3 Batch No. — 3 Batch No.
Production batch number
13 Component — 4 123456 — 4 123456
manufacturer/
14 supplier — 5 — 5
15 — 6 — 6
16 — 1 — 1
Production site Site 12 Site 12
17 — 2 — 2
18 Table 4 SDR value — 7 SDR 11 — 8 SDR 9
19 — 0 — 0
20 — 1 — 1
List on web site PE compound A01 0101
21 — 0 — 0
22 — 1 — 1
23 Table B.8 Type of material — 0 Virgin material + 0, + 3, + 6 d 4 e

24 Table B.9 PE designation — 2 PE 80 — 3 PE 100

25 Table B.10 MFR — 5 15 < MFR u 20 — 4 10 < MFR u 15
26 Digits 1 to 25 Control character — 0 — — 0 f

a For component diameter information with the type 1 encoding system, as specified in Table B.2.
b For checksum information, as specified in Table B.3.
c To differentiate between type 1 and type 2, as specified in Table B.5.
d For component diameter information in the type 2 encoding system, as specified in Table B.2.
e 1 (100 % reprocessable material) + 3 (one diameter, expressed in millimetres).
f Calculated in accordance with Clause A.9 of ISO/TR 13950:1997:
10 – [(9+5+5+1+0+2+4+6+2+0+0+4+4) × 3 + (0+2+3+6+1+3+5+1+8+1+1+3]10 = 0

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 ISO 12176-4:2003(E)

B.2 Magnetic-stripe card

The encoding of the process-specific fusion-jointing parameters shall be as specified in ISO/TR 13950:1997,
including the product types (P0 ... P6) (see ISO/TR 13950:1997, Clause B.5), and the code shall include the
information specified in Table B.13.

The production batch code shall include the SDR series and the PE material used, as defined in Table 4 and
Table B.9.

Table B.13 — Details for encoding on magnetic card

Characteristic Identifier/number of digits Example

Manufacturer/supplier (logo) F/2 FGF

Product/diameter P/10 P4,160 × 110 (reducer)
Product batch code + SDR and PE material S/6,2,1,3 S123456,11,7,N10

B.3 Microchip card

See Clause B.1 for encoding of data.
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 ISO 12176-4:2003(E)

Bibliography

[1] ISO 4437:1997, Buried polyethylene (PE) pipes for the supply of gaseous fuels — Metric series —
Specifications

[2] ISO 8085-1:2001, Polyethylene fittings for use with polyethylene pipes for the supply of gaseous
fuels — Metric series — Specifications — Part 1: Fittings for socket fusion using heated tools

[3] ISO 8085-2:2001, Polyethylene fittings for use with polyethylene pipes for the supply of gaseous
fuels — Metric series — Specifications — Part 2: Spigot fittings for butt fusion, for socket fusion using
heated tools and for use with electrofusion fittings

[4] ISO 8085-3:2001, Polyethylene fittings for use with polyethylene pipes for the supply of gaseous
fuels — Metric series — Specifications — Part 3: Electrofusion fittings

[5] ISO 10838-1:2000, Mechanical fittings for polyethylene piping systems for the supply of gaseous
fuels — Part 1: Metal fittings for pipes of nominal outside diameter less than or equal to 63 mm

[6] ISO 10838-2:2000, Mechanical fittings for polyethylene piping systems for the supply of gaseous
fuels — Part 2: Metal fittings for pipes of nominal outside diameter greater than 63 mm

[7] ISO 10838-3:2001, Mechanical fittings for polyethylene piping systems for the supply of gaseous
fuels — Part 3: Thermoplastics fittings for pipes of nominal outside diameter less than or equal to
63 mm

[8] ISO/TS 10839:2000, Polyethylene pipes and fittings for the supply of gaseous fuels — Code of
practice for design, handling and installation

[9] ISO 10933:1997, Polyethylene (PE) valves for gas distribution systems

[10] ISO 12176-1:1998, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems —
Part 1: Butt fusion

[11] ISO 12176-2:2000, Plastics pipes and fittings — Equipment for fusion jointing polyethylene systems —
Part 2: Electrofusion

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 --`,,`,-`-`,,`,,`,`,,`---

Copyright International Organization for Standardization

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 ISO 12176-4:2003(E)

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ICS 75.200; 83.140.30

Price based on 24 pages

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