Optical fibre cables - Part 1-219: Generic specification - Basic optical cable test procedures - Material compatibility test, method F19

IEC 60794-1-219:2021 applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, as well as hybrid telecommunication cables having a combination of both optical fibres and electrical conductors. The object of this document is to define test procedures to be used in establishing uniform requirements for the material compatibility performance of cables, cable components, and cable subassemblies. Compatibility of materials within a cable has the potential to involve a range of material pairs. However, experience has shown that the most pertinent evaluations are of the cable filling and flooding materials' interactions with other materials in the cable. NOTE Throughout the document the wording “optical cable” can also include optical fibre units, microduct fibre units, etc. See IEC 60794-1-2 for general requirements and definitions, as well as for a reference guide to test methods of all types.

Câbles à fibres optiques - Partie 1-219 : Spécification générique - Procédures fondamentales d’essais des câbles optiques - Essai de compatibilité des matériaux, Méthode F19

IEC 60794-1-219:2021 s’applique aux câbles à fibres optiques destinés à être utilisés avec les équipements de télécommunication et les dispositifs utilisant des techniques analogues, ainsi qu’aux câbles de télécommunication hybrides constitués d’une combinaison de fibres optiques et de conducteurs électriques. L’objet du présent document est de définir les procédures d’essai à utiliser pour fixer des exigences homogènes relatives à la compatibilité des matériaux des câbles, organes de câble et sous-ensembles de câble. La compatibilité des matériaux au sein d’un câble implique potentiellement une gamme de paires de matériaux. Cependant, l’expérience a montré que les évaluations les plus pertinentes portent sur les interactions des matériaux de remplissage et d’enduction avec les autres matériaux du câble. NOTE Tout au long du présent document, l’expression "câble optique" peut également inclure des unités de fibres optiques, des unités de fibres en microconduits, etc. Voir l’IEC 60794-1-2 pour les exigences générales et les définitions, ainsi que le guide de référence de tous les types de méthodes d’essai.

General Information

Status
Published
Publication Date
21-Nov-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
22-Nov-2021
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IEC 60794-1-219
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –

Part 1-219: Generic specification – Basic optical cable test procedures – Material

compatibility test, method F19
Câbles à fibres optiques –
Partie 1-219: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Essai de compatibilité des matériaux, méthode F19
IEC 60794-1-219:2021-11(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60794-1-219
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-219: Generic specification – Basic optical cable test procedures –
Material compatibility test, method F19
Câbles à fibres optiques –
Partie 1-219: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Essai de compatibilité des matériaux, méthode F19
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-1053-9

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60794-1-219:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 6

4 Method F19 – Material compatibility test .......................................................................... 6

4.1 Object ..................................................................................................................... 6

4.2 Sample ................................................................................................................... 6

4.2.1 General ........................................................................................................... 6

4.2.2 Completed cable samples ................................................................................ 6

4.2.3 Individual components samples ....................................................................... 6

4.3 Ageing procedure .................................................................................................... 8

4.4 Applicable tests ...................................................................................................... 8

4.4.1 General ........................................................................................................... 8

4.4.2 Visual inspection ........................................................................................... 10

4.4.3 Physical testing ............................................................................................. 10

4.5 Details to be specified ........................................................................................... 12

Bibliography .......................................................................................................................... 13

Figure 1 – Typical test set-up for coloured fibre wiping test ................................................... 11

Table 1 – Tests applicable for material compatibility evaluation .............................................. 9

---------------------- Page: 4 ----------------------
IEC 60794-1-219:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-219: Generic specification – Basic optical cable
test procedures – Material compatibility test, method F19
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

IEC 60794-1-219 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical

committee 86: Fibre optics. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2138/FDIS 86A/2143/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.
---------------------- Page: 5 ----------------------
– 4 – IEC 60794-1-219:2021 © IEC 2021

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

A list of all parts in the IEC 60794 series, published under the general title Optical fibre cables,

can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 60794-1-219:2021 © IEC 2021 – 5 –
OPTICAL FIBRE CABLES –
Part 1-219: Generic specification – Basic optical cable
test procedures – Material compatibility test, method F19
1 Scope

This part of IEC 60794 applies to optical fibre cables for use with telecommunication equipment

and devices employing similar techniques, as well as hybrid telecommunication cables having

a combination of both optical fibres and electrical conductors.

The object of this document is to define test procedures to be used in establishing uniform

requirements for the material compatibility performance of cables, cable components, and cable

subassemblies.

Compatibility of materials within a cable has the potential to involve a range of material pairs.

However, experience has shown that the most pertinent evaluations are of the cable filling and

flooding materials' interactions with other materials in the cable.

NOTE Throughout the document the wording “optical cable” can also include optical fibre units, microduct fibre

units, etc.

See IEC 60794-1-2 for general requirements and definitions, as well as for a reference guide

to test methods of all types.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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.

IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test

procedures – General guidance

IEC 60794-1-23, Optical fibre cables – Part 1-23: Generic specification – Basic optical cable

test procedures – Cable element test methods

IEC 60811-501, Electric and optical fibre cables – Test methods for non-metallic materials –

Part 501: Mechanical tests – Tests for determining the mechanical properties of insulating and

sheathing compounds

IEC 61196-1-101, Coaxial communication cables – Part 1-101: Electrical test methods – Test

for conductor d.c. resistance of cable

IEC 61196-1-102, Coaxial communication cables – Part 1-102: Electrical test methods – Test

for insulation resistance of cable dielectric

IEC 61196-1-105, Coaxial communication cables – Part 1-105: Electrical test methods – Test

for withstand voltage of cable dielectric
---------------------- Page: 7 ----------------------
– 6 – IEC 60794-1-219:2021 © IEC 2021
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Method F19 – Material compatibility test
4.1 Object

The object of this test is to determine the components’ compatibility with polymeric tube/cable

core filling material(s) and/or water-blocking materials that are in direct contact with the

identified components within the cable structure. This test applies to all water-blocked cables.

Typical water-blocking materials include, but are not limited to, filling compounds, absorbent

powders, and flooding compounds.
4.2 Sample
4.2.1 General

Material compatibility can be tested using either the completed cable or individual components.

The choice of the method will depend on material availability and the final intent of the test

program.
4.2.2 Completed cable samples

Cable specimens of sufficient length to perform applicable tests shall be taken from each test

cable sample (a typical length is 3 m).The cable ends shall be capped to prevent the migration

of water-blocking material out of the cable. The minimum specimen coil diameter shall be the

larger one of 500 mm and the minimum cable bend diameter.
4.2.3 Individual components samples
4.2.3.1 General

The sample of individual components shall consist of a container of sufficient size to contain

the component specimens, the specimens to be tested, and an amount of filling or flooding

compound (as appropriate) to completely cover the specimens in the container or, in the case

of the sheath, to coat the specimens. The preparation of the samples includes the steps of

placing specimens in the container and pouring the filling or flooding compound over those

specimens. Whether to use the filling or flooding compound depends on what material is

adjacent to the component to be tested in the actual cable. A filling or flooding compound can

also include an activated dry water-blocking material. The exact test details for the compatibility

between dry water-blocking material containing absorbent powders and other cable
components are still under consideration.
4.2.3.2 Fibre and buffered fibre

A fibre, semi-tight buffered fibre or tight buffered fibre of sufficient length to perform the coating

strip force test in accordance with IEC 60794-1-23, methods G10A and G10C, shall be used in

this test. The specimen shall coil and fit easily into a container. The coil diameter should be

75 mm minimum. Cover the fibre specimens with the filling compound.
---------------------- Page: 8 ----------------------
IEC 60794-1-219:2021 © IEC 2021 – 7 –
4.2.3.3 Optical fibre ribbon

An optical fibre ribbon of sufficient length suitable to perform the ribbon stripping test in

accordance with IEC 60794-1-23, method G10B, shall be used. The specimen shall coil and fit

easily into a container. The coil diameter should be 75 mm minimum. Cover the optical fibre

ribbon specimens with the filling compound.
4.2.3.4 Polymeric tube

Step 1 – Cut a minimum of five polymeric tube specimens of suitable length with the filling

material inside. The ends shall be capped to prevent the migration of the filling material out of

the specimens. If the specimens need to be coiled, the minimum coil diameter should be the

larger one of 300 mm and 50 times tube diameter.

Step 2 – Cut a minimum of five polymeric tube specimens of suitable length with the filling

material inside from the same batch as in step 1. The ends shall be capped to prevent the

migration of the filling material out of the specimens. Fit the specimens into a suitable container.

If the specimens need to be coiled, the minimum coil diameter should be the larger one of

300 mm and 50 times tube diameter. Cover the polymeric tube specimens with the flooding

compound.

Perform only Step 1 of the test, if polymeric tube is exposed only to the filling compound and

the flooding compound is not used in cable construction. It is allowed to perform only Step 2 of

the test in the case that polymeric tube is exposed to both filling compound and flooding

compound. If the test fails, performing Step 1 may be useful to determine which parts of the

cable are not compatible. If only the filling compound in cable construction has been changed,

just perform Step 1 and if only the flooding compound in cable construction has been changed,

just perform Step 2.
4.2.3.5 Sheath

Perform tests on specimens of sheath material prepared from the granular or pelletized raw

materials on extruded tubes of sheath material using parameters similar to the actual sheath,

or on specimens of actual extruded sheaths removed from cables. Unless otherwise specified,

prepare specimens in accordance with IEC 60811-501. A minimum of five aged and five unaged

(control) specimens shall be used for the test.

The sheath material specimens to be aged shall be prepared for testing by coating these sheath

specimens with the flooding material on only one side. The flooding compound shall be heated

to (100 ± 2) °C in order to produce uniform distribution. Apply a thin layer of the flooding

material using a spatula, or paint the heated and liquified material on with a brush, etc., so the

outer surface is completely covered. Do not soak the specimens in the compound.
4.2.3.6 Composite strength member

Cut a minimum of five strength members (composite rods or yarns, central or peripheral)

specimens of suitable length. Fit the specimens in a suitable container. Cover the composite

strength member specimens with the flooding compound.
4.2.3.7 Coated metal tape

Cut a specimen of coated metal tape (shielding tape, armour tape, screen tape) 150 mm long

for evaluation. If a choice of tape width is possible, select a width narrow enough to fit easily

into a container (beaker, graduated cylinder, etc.). Cover the specimen with the flooding

compound.
---------------------- Page: 9 ----------------------
– 8 – IEC 60794-1-219:2021 © IEC 2021
4.2.3.8 Conductor unit

A suitable length of conductor unit (coaxial cable, pair/quad cable, current carrying conductor

and so on) shall coil and fit easily into a container. Cover the conductor unit specimen with the

flooding compound.
4.3 Ageing procedure

Completed cable and sheath samples should be aged at a temperature of (85 ± 3) °C and a

noncondensing relative humidity of (85 ± 5) % for a period of 30 days, or exposed to the

conditions and during the time specified in the detailed specification.

For individual components encapsulated in or treated with the filling or flooding material, the

samples mentioned in 4.2.3.1, except the sheath, should be aged at a temperature of (85 ± 3) °C

and uncontrolled humidity for a period of 30 days, or exposed to the conditions and during the

time specified in the detailed specification.

For individual components along with dry water-blocking material containing absorbent powders,

the samples should be aged at a temperature of (85 ± 3) °C and a noncondensing relative

humidity of (85 ± 5) % for a period of 30 days, or exposed to the conditions and during the time

specified in the detailed specification.

After conditioning, allow the sample to cool to room ambient conditions for about 2 h. The

components in contact with the water blocking material shall be removed from the cable or from

the container. Allow as much of the compound as possible to drain from the sample. Except for

the metal tape (avoid wiping the specimen), clean the samples carefully (typically using a paper

towel or a clean dry cloth). Do not expose the coated metal tape, optical fibre and buffered fibre,

and optical fibre ribbon to solvents to remove the filling or flooding material.
4.4 Applicable tests
4.4.1 General

After ageing, tests shall be selected from Table 1, in accordance with the sample type or

customer's requirements.
NOTE If hydrogen is of concern, IEC TR 62690 is considered.
---------------------- Page: 10 ----------------------
IEC 60794-1-219:2021 © IEC 2021 – 9 –
Table 1 – Tests applicable for material compatibility evaluation

Component Fibre/Buffered Optical fibre Polymeric tube Sheath Composite Coated metal tape Conductor unit

fibre ribbon strength member

Tests on With tube filling With tube filling With tube filling With flooding With flooding With flooding With flooding

individual (inside) and
components flooding (outside)

Visual inspection Visual inspection Visual inspection Visual inspection Visual inspection Visual inspection Visual inspection

(stability) (delamination)

Coloured fibre Optical fibre ribbon Polymeric tube kink Tensile strength DC resistance

wiping strippability and elongation
Fibre strippability Polymeric tube Insulation
bend resistance
Withstand voltage
of dielectric
Visual inspection Visual inspection

Tests on cable Visual inspection Visual inspection Visual inspection Visual inspection Visual inspection

(stability) (delamination)

Coloured fibre Optical fibre ribbon Polymeric tube kink Tensile strength DC resistance

wiping strippability and elongation
Fibre strippability Polymeric tube Insulation
bend resistance
Withstand voltage
of dielectric
---------------------- Page: 11 ----------------------
– 10 – IEC 60794-1-219:2021 © IEC 2021
4.4.2 Visual inspection

Visual inspection shall be carried out using normal or normal corrected vision. Inspection for

splitting and cracking shall be carried out using a 5X magnification. The requirement of visual

inspection shall be given in the detailed specification.

Examine the fibre or buffered fibre to see whether the fibre coatings exhibit cracking, splitting,

or delamination. For coloured fibres, check the specimen surface to see whether the colour is

identifiable and whether the colour transfers to the water-blocking compound.

Examine the optical fibre ribbon to see whether it exhibits delamination or fibre separation.

Examine the polymeric tube surface to see whether it exhibits any cracking or splitting. For

coloured tubes, check the specimen surface to see whether the colour is identifiable and

whether the colour transfers to the water-blocking compound.

Examine the specimens of sheath material to see whether they exhibit swelling/distortion.

Examine the specimens of composite strength members to see if there is separation,

delamination or loss of physical integrity.

Examine the specimen of coated metal tape to see whether it exhibits delamination.

Examine the specimen of conductor unit to see whether insulations exhibit any cracking or

splitting, whether the colour of insulations is identifiable and whether the colour transfers to the

water-blocking compound.
4.4.3 Physical testing
4.4.3.1 Coloured fibre wiping test

After ageing, the wiping test should be used to determine the durability of the fibre colour.

Alternative test methods may be agreed between the customer and the supplier. See Figure 1.

a) Wipe solvent: industrial alcohol.

b) Load: 5 N applied over a length of 100 mm (0,5 N/cm), or as specified by the detailed

specification.

c) Fibre length under test: 200 mm or as specified by the detailed specification.

d) Number of wipes: 3 cycles to 10 cycles.
e) Wiping tool: alcohol swabs.
f) Wiping frequency: 10 wipes/min to 60 wipes/min.

NOTE One cycle contains two wipes. If the specimen contains ring marking, the marking will be in the sample length

subjected to the wipes. The pad is kept wet.

The load is applied by a mechanical machine. Manual testing should follow the detailed

specification.

The requirements shall be given in the detailed specification (for example, no colour shall

transfer to the alcohol swabs).
---------------------- Page: 12 ----------------------
IEC 60794-1-219:2021 © IEC 2021 – 11 –
Figure 1 – Typical test set-up for coloured fibre wiping test
4.4.3.2 Fibre and buffered fibre strippability

IEC 60794-1-23, method G10, should be used for measuring the strip force needed to remove

the optical fibres’ coating or coating together with the buffer.

For fibre, IEC 60794-1-23, method G10A, is applied. The force required to strip (30 ± 3) mm of

coating shall comply with the values given in the detailed specification.

For tight buffered fibres, IEC 60794-1-23, method G10C; is applied. The force and the length

required to strip the coating and buffer material, in a single operation, shall comply with the

values given in the detailed specification.

For semi-tight buffered fibres, IEC 60794-1-23, method G10C, is applied. The buffer shall be

removed in a single operation, leaving the fibre coating intact. The required force and length

for the buffer removal shall comply with the values given in the detailed specification.

4.4.3.3 Optical fibre ribbon strippability

After ageing, IEC 60794-1-23, method G10B, should be used to evaluate the strippability of the

optical fibre ribbon matrix and the fibres’ coatings from the aged optical fibre ribbons without

any fibre breakage. Any coating residue shall be easily removable by using isopropyl alcohol

wipes.
4.4.3.4 Polymeric tube kink test

The aged polymeric tubes shall be tested in accordance with IEC 60794-1-23, method G7. Use

a minimum of five aged specimens for the test.
No kink shall occur after the polymeric tube kink test.
4.4.3.5 Polymeric tube bend test

Use IEC 60794-1-23, method G1, as a guide. Select a mandrel having a diameter that is the

larger one of 75 mm and 20 times the tube diameter.

Perform the test sequence 3 times, each time within 30 s,. Wrap the specimen of aged p

...

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