ISO 21809-3:2008/Amd 1:2011
(Amendment)Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 3: Field joint coatings — Amendment 1
Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 3: Field joint coatings — Amendment 1
Industries du pétrole et du gaz naturel — Revêtements externes des conduites enterrées ou immergées utilisées dans les systèmes de transport par conduites — Partie 3: Revêtements des joints soudés sur site — Amendement 1
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 21809-3
First edition
2008-12-15
AMENDMENT 1
2011-11-15
Petroleum and natural gas industries —
External coatings for buried or
submerged pipelines used in pipeline
transportation systems —
Part 3:
Field joint coatings
AMENDMENT 1
Industries du pétrole et du gaz naturel — Revêtements externes des
conduites enterrées ou immergées utilisées dans les systèmes de
transport par conduites —
Partie 3: Revêtements des joints soudés sur site
AMENDEMENT 1
Reference number
ISO 21809-3:2008/Amd.1:2011(E)
©
ISO 2011
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ISO 21809-3:2008/Amd.1:2011(E)
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ii © ISO 2011 – All rights reserved
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ISO 21809-3:2008/Amd.1:2011(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.
Amendment 1 to ISO 21809-3:2008 was prepared by Technical Committee ISO/TC 67, Materials, equipment
and offshore structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline
transportation systems.
Amendment 1 to ISO 21809-3:2008 adds field joint coatings based on non-crystalline low-viscosity polyolefin
tapes and makes corrections to the technical requirements of ISO 21809-3:2008.
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ISO 21809-3:2008/Amd.1:2011(E)
Petroleum and natural gas industries — External coatings for
buried or submerged pipelines used in pipeline transportation
systems —
Part 3:
Field joint coatings
AMENDMENT 1
Page 1, Clause 2
In the list of normative references, replace
“ISO 31-0:1992, Quantities and units — Part 0: General principles”
with
“ISO 80000-1:2009, Quantities and units — Part 1: General”
Page 7, 5.1
Replace both instances of “ISO 31-0:1992” with “ISO 80000-1:2009”.
Page 9, 7.2.1; page 13, 9.1.2.1 and 9.1.2.2; page 14, 9.1.3 and 9.4; page 64, D.1.1; page 65, D.1.3.1; page 66,
D.1.4 and D.2.1; page 83, I.5
Replace the cross-reference to “Clauses 10 to 17” with one to “Clauses 10 to 18”.
Page 12, Clause 8
Add the following new rows in Table 1:
Code Clause Type of field joint coating
Coatings based on non-crystalline low-viscosity polyolefin tapes with polymeric tape outer
1E-a
wrap
18
Coatings based on non-crystalline low-viscosity polyolefin tapes with heat shrinkable sleeve
1E-b
outer wrap
Page 14, 9.1.2.2, seventh paragraph
Replace “1A, 1B, 1C, 1D, 2A and 7” with “1A, 1B, 1C, 1D, 1E-a, 1E-b, 2A, and 7”.
Page 15, 10.2.2
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ISO 21809-3:2008/Amd.1:2011(E)
Replace the first sentence with the following:
“Petrolatum tape coatings consist of a single layer or multiple layers of petrolatum tapes, with or without
a primer.”
Page 17, 10.4.4
Replace the third bullet with the following:
— Apply a thin coat of compatible primer (if any) by brush, by hand or using other applicable tools.
Page 21, Table 5
Replace Table 5 with the one given below.
Table 5 — Requirements for Type 1C — Wax tape and primer
Test
Property temperature Units Requirements Test method
°C
Primer
Congeal point — °C 55 to 70 ASTM D 938
Flash point — °C ≥ 65 ASTM D 92
3
Specific gravity 25 g/cm 0,9 to 1,25 ASTM D 70
Cone penetration 25 0,1 mm 75 to 225 ASTM D 937
Dielectric strength — V/µm ≥ 4 ASTM D 149
Tape
Congeal point of saturant — °C 65 to 70 ASTM D 938
Flash point of saturant — °C ≥ 60 ASTM D 92
Thickness — mm > 1,75 ASTM D 1000
Dielectric strength — V/µm > 6,7 ASTM D 149
Complete coating
Impact resistance 20 J/mm ≥ 0,8 Annex G
2
Test pressure N/mm 0,1
Holiday detection — No holiday
Indentation resistance 23 Annex H
Residual thickness mm ≥ 0,6
2 6
R Ω⋅m ≥ 10
S100
Specific electrical
— Annex K
a
insulation resistance
R /R — ≥ 0,8
S100 S70
Cathodic disbondment resistance at 28 days 23 mm < 12 Annex F
Leave a film of
Peel strength to pipe surface and plant coating 23 — compound on —
the substrate
Peel strength to steel and plant coating before Leave a film of
and after 28-day hot-water immersion test at 23 — compound on Annex I
30 °C the substrate
No dripping of
Drip resistance 45 — Annex J
compound
Holiday detection at 5 kV/mm + 5 kV — — No holiday Annex B
a
This requirement (R /R ≥ 0,8) need be fulfilled only if the specific electrical insulation resistance after 70 days is less than
S100 S70
10 times the requirement of the specific electrical insulation resistance after 100 days.
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ISO 21809-3:2008/Amd.1:2011(E)
Page 31, Table 16
In row 5, column 3, delete the cross-reference to “Table 1”.
Page 37, 13.5.4
Replace the text of the entire subclause with the following:
The adhesion to the steel surface shall be tested in accordance with ISO 4624 (pull-off test) and shall meet
the requirements of Table 19 or 20. For production testing, the method defined in Annex C may be used for
Types 4A and 4B, unless otherwise agreed. The results shall meet the requirements of Table 19.
The adhesion to plant-applied coating shall be tested in accordance with Annex C for Types 4A and 4B and
ISO 4624 for Types 4C, 4D and 4E, and shall meet the requirements of Table 19 or 20. Alternatively, the
adhesion test may be carried out using ISO 4624 for Types 4A and 4B for PQT and PPT, and shall meet
the requirements of Table 19 or 20.
Page 37, 13.5.8
Replace the text of the entire subclause with the following:
A hot water immersion test shall be carried out in accordance with Annex I, the test temperature being the
maximum design temperature of the joint coating, limited as specified in Annex I.
The adhesion to the steel surface shall be tested in accordance with ISO 4624 (pull-off test) during PQT
and PPT and shall meet the requirements of Table 19 or 20.
The adhesion to plant-applied coating shall be tested in accordance with Annex C during PQT and PPT
for Types 4A and 4B and in accordance with ISO 4624 for Types 4C, 4D and 4E, and shall meet the
requirements of Table 19 or 20. Alternatively, the adhesion test may be carried out using ISO 4624 (pull-off
test) and shall meet the requirements of Table 19 or 20 for Types 4A and 4B.
Page 39, Table 19
In row 10, column 2, replace “2 °C” by “20 °C”.
In row 15, column 8, replace “ISO 4624” by “Annex I plus ISO 4624”.
Page 40, Table 20
Delete row 6 (Cathodic disbondment at 48 h).
In row 11, column 2, replace “23 °C” by “20 °C”.
Page 59
Add the following Clause 18 before Annex A.
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ISO 21809-3:2008/Amd.1:2011(E)
18 Coatings based on non-crystalline low-viscosity polyolefin tapes
18.1 Coating identification
Coatings based on non-crystalline low-viscosity polyolefin tapes shall be identified in the APS in accordance
with Table 40 and shall meet the requirements of Table 41.
Data sheets for the non-crystalline low-viscosity polyolefin compound tapes used as the base of the coatings
shall be in accordance with Table 42.
Application instructions shall be provided by the manufacturer in accordance with Table 43.
18.2 Description of the coatings
The coatings consist of the following:
— a coat comprising one or several layers of a non-crystalline low-viscosity (fully amorphous, non-crosslinked)
polyolefin (e.g. polyisobutylene) compound tape applied without any primer or adhesive; this material may
be reinforced by fabrics; a backing film may cover this compound tape;
— an outer wrap, which shall be a polymeric tape (FJC type 1E-a) or a heat-shrinkable sleeve (FJC type 1E-b)
or any other agreed material, provided that the requirements of Table 41 are fulfilled for the complete
coating.
NOTE The purposes of the outer wrap are to provide additional pressure in order to support cold flow of the compound
tape and self-healing properties of the complete coating system and to give mechanical protection.
Maximum design temperature is 50 °C to 80 °C, depending on the composition of the non-crystalline low-
viscosity polyolefin compound tape and on the choice of outer wrap.
Specific configurations allowing higher maximum design temperature may be used subject to qualification.
The maximum design temperature shall be precisely defined in the APS and for the coating identification (see
Table 40). Requirements given in Table 41 are applicable whatever the maximum design temperature.
18.3 Surface preparation
Surface preparation shall be carried out in accordance with the APS. The edges of the plant coating shall be
bevelled and the plant coating shall be roughened over the minimum length specified for the overlap on the
plant coating (see 18.4.2).
Surface preparation shall be carried out either by means of wire-brush cleaning in accordance with 9.1.2.1
and 9.1.2.3 to a minimum degree of cleanliness of ISO 8501-1:2007, grade St 2, or by means of abrasive blast
cleaning in accordance with 9.1.2.1 and 9.1.2.2 to a minimum degree of cleanliness of ISO 8501-1:2007, grade
Sa 2 ½.
Alternative surface preparation methods may be used by agreement.
Dust contamination shall be a maximum of grade 3 measured in accordance with ISO 8502-3:1992.
18.4 Application of the coatings
18.4.1 General
Application of the coatings shall be carried out in accordance with the APS.
The non-crystalline low-viscosity polyolefin compound tape shall be applied without tension by means of lay-up
techniques, using prefabricated shapes and sizes which are wrapped in a wrap-around method. Alternatively,
spiral wrapping may be used for small-diameter pipes.
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ISO 21809-3:2008/Amd.1:2011(E)
The outer wrap shall be applied directly on the compound tape in accordance with 10.4.5 for polymeric tape
or 11.4.3 for heat-shrinkable sleeves, or in accordance with the manufacturer’s recommendations for other
agreed materials.
The minimum application temperature shall be 20 °C above the glass transition temperature of the low-viscosity
polymer.
18.4.2 Overlap
The overlap of the compound tape on the plant-applied coating shall be in accordance with the manufacturer’s
application instructions (see Table 43) and shall be a minimum of 50 mm.
The outer wrap shall cover the compound tape.
When a polymeric tape is used for the outer wrap (Type 1E-a), it may overlap the plant coating.
When a heat-shrinkable sleeve (Type 1E-b) is used, it shall overlap the plant coating by at least 50 mm on both
sides, excluding bevels.
The overlap of any other agreed outer wrap material shall be in accordance with the manufacturer’s
recommendations.
A double thickness of the compound tape shall be applied in an area extending 25 mm either side of the weld
cap.
The overlap of the spirally wrapped outer wrap tape shall be 50 %.
18.5 Testing of the applied coating
18.5.1 General
The tests in 18.5.2 to 18.5.14, summarized in Table 41, shall be carried out for production quality control and
for PQT and PPT if required.
18.5.2 Thickness
The minimum thicknesses of the compound tape and of the complete coating shall be agreed between the end
user and/or purchaser and the applicator, based on the data sheets and recommendations of the manufacturers.
The minimum thickness shall be specified in the APS.
Unless otherwise agreed with the purchaser, the minimum thickness of the complete coating on the weld cap
shall be not less than 0,6 mm.
NOTE The coating thickness on the weld cap is normally less than on the body because some of the coating material
flows from the weld cap to the body, both during and after application. This is necessary to prevent voids in the coating
and is not detrimental to the corrosion protection.
The coating thickness shall be measured using the method given in Annex A.
18.5.3 Holiday detection
The entire surface of the coated joint shall be checked for holidays or other discontinuities at a voltage of
5 kV/mm + 5 kV at a maximum of 25 kV, in accordance with the method defined in Annex B. This test shall be
carried out after application of the compound tape and may be repeated after completion of the coating where
so required by the purchaser.
Holidays shall be repaired in accordance with the APS.
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ISO 21809-3:2008/Amd.1:2011(E)
18.5.4 Impact resistance
The impact resistance shall be measured on the complete coating, using the method given in Annex G, and
shall meet the requirements of Table 41.
18.5.5 Indentation resistance
The indentation resistance shall be measured on the complete coating at 23 °C and at maximum design
temperature, using the method given in Annex H, and shall meet the requirements of Table 41.
18.5.6 Specific electrical insulation resistance
The specific electrical insulation resistance shall be measured on the compound tape, using the method given
in Annex K, and shall meet the requirements of Table 41.
18.5.7 Cathodic disbondment resistance
The cathodic disbondment resistance shall be measured on the complete coating, using the method given in
Annex F carried out on a pipe section. The resistance to cathodic disbondment shall meet the requirements of
Table 41. The cathodic disbondment test shall be carried out over a period of 28 days at 23 °C. A test duration
of 48 h instead of 28 days may be used for PPT or production testing if the test temperature is increased to
65 °C and provided that comparison of results is performed during PQT.
The cathodic disbondment after 28 days at maximum design temperature (subject to an upper limit of 95 °C)
shall meet the requirements of Table 41.
At the end of the test, the thickness of the compound tape at the location of the artificial defect shall be as a
minimum the thickness specified in the APS and no holiday shall be detected.
18.5.8 Peel strength between outer wrap and compound tape and between layers of outer wrap
The peel strength between outer wrap and compound tape (with or without backing) shall be measured at 23 °C
and at maximum design temperature, using the method given in Annex M, and shall meet the requirements of
Table 41.
If the outer wrap consists of multiple layers, the peel strength between outer wrap layers shall also be
measured at 23 °C and at maximum design temperature, using the method given in Annex M, and shall meet
the requirements of Table 41.
18.5.9 Adhesion to pipe surface and plant coating
18.5.9.1 General
The adhesion test shall be carried out after application of the outer wrap and after cooling where heat has been
applied.
18.5.9.2 Testing
The peel strength with respect to steel and plant coating of compound tape containing reinforcement shall be
tested at 23 °C and at maximum design temperature, using the methods given in Annex D, and the results
concerning failure mode and substrate coverage shall meet the requirements given in Table 41, unless otherwise
agreed by all parties including the manufacturer. The method given in D.1 shall be used for PQT. The method
given in D.2 may be used for PPT and production testing.
The adhesion to steel and plant coating of compound tape containing no reinforcement shall be measured as
follows. Adhesion testing shall be carried out at the 6 o’clock and 12 o’clock positions of the FJC by using a
utility knife to attempt to lift the coating material fr
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