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/ 20
‘Accessed by KIV (Kelog Joint Ventute) on 17 Ose 2001
AS/NZS 3750.3:1994
Australian/New Zealand Standard
Paints for steel structures
Part 3: Heat resisting—Exterior ‘Accessed by KIV (Kellog Joint Venture) on 17 Dec 2001
ASINZS 3750.3:
94
‘This Joint Australian/New Zealand Standard was prepared by Joint Technical
Committee CH/3, Paints and Related Materials. It was approved on behalf of the
Councit of Standards Australia on 24 June 1994 and on behalf of the Council of
Standards New Zealand on 4 July 1994. It was published on 15 August 1994.
‘The following interests are represented on Committee CH/3:
Australasian Corrosion Association
Australian Chamber of Commerce and Industry
Australian Paint Manufacturers Federation
AUSTROADS
Department of Defence
Government Paint Committee
National Association of Testing Authorities, Australia
Railways of Australia Committee
Retailers Council of Australia
Telecom Australia
Additional interests participating in preparation of Standard:
‘New Zealand Manufacturers Federation
Telare New Zealand
Review of Standards. To keep abreast of progress in industry, Joint Australian/New
Zealand Standards are subject to periodic review and are kept up to date by the issue
of amendments or new editions as necessary. It is important therefore that Standards
users ensure that they are in posession of the Ines edition, and any amendments
ereto.
Full details of all Joint Standards and related publications will be found in the
Standards Australia and Standards New Zealand Catalogue of Publications; this
information is supplemented each month by the magazines “The Australian Standard’
and ‘Standards New Zealand", which subscribing members receive, and which give
details of new publications, new editions and amendments, and of withdrawn
Standards.
‘Suggestions for improvements to Joint Standards, addressed to the head office of either
Standards Australia or Standards New Zealand, are welcomed. Notification of any
inaccuracy or ambiguity found in a Joint Australian/New Zealand Standard should be
made without delay in order tha the mater may be investigated and appropriate ation
taken,
This Standard was issued in draft form for comment as DR 93014. -Acoassed by KIV (Kelog Joint Venture) on 17 Dee 2001
AS/NZS 3750.3:1994
Australian/New Zealand Standard
Paints for steel structures
Part 3: Heat resisting—Exterior
First published Joint Standard ASINZS 3750351994
PUBLISHED JOINTLY BY:
‘STANDARDS AUSTRALIA
1 The Crescent,
Homebush NSW 2140 Australia
STANDARDS NEW ZEALAND
Level 10, Standards House,
185 The Terrace,
Wellington 6001 New Zealand
SBN 0 7282 01929 ‘Accesses by KJV (Kellogdoint Venture) on 17 Dee 2001,
ASINZS 3750.3:1994
PREFACE
‘This Standard was prepared by the Joint Australian/New Zealand Standards Committee CH/3
on Paints and Related Materials, under the ditection of the Multitechnics Standard Policy
Board. It forms part of a series of product Standards for paints referred to in AS 2312, Guide
to the protection of iron and steel against exterior atmospheric corrosion.
‘The following Standards in this series have been published:
‘AS 2364 Paints for steel structures—High-build epoxy (two-pack)
AS 2602 Paints for steel structures—Full-gloss polyurethane (two-pack)
AS 2603 Paints for stecl structures—Full-gloss epoxy (two-pack)
AS 2672 Paints for steel structures—Chlorinated rubber, high-build
AS 2673 Paints for steel structures—Alkyd/micaceous iron oxide
AS 2674 Paints for steel structures—Epoxy primer (two-pack)
‘AS 3884 Etch primers (single-pack and two-pack) for pretreating metal surfaces
AS 3885 Paints for steel structures—Galvanized and zinc primed—Latex
‘AS 3886 Paints for steel structures—Vinyl paint—High-build
AS 3887 Paints for steel structures—Coal tar epoxy (two-pack)
AS 3750 Paints for steel structures
AS 3750.1 Part I: Epoxy mastic (two-pack)—For rusted steel
AS 3750.2. Part 2: Ultra high-build paint
AS/NZS
3750.4 Part 4: Bitumen paint
The terms ‘normative’ and ‘informative’ have been used in this Standard to define the
application of the appendix to which they apply. A ‘normative” appendix is an integral part
of a Standard, whereas an ‘informative’ appendix is only for information and guidance.
© Copyight ~ STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND
‘Users of Standards are remind that copyight subsists in all Stadards Awialia and Sandans New Zealand publications and software
Except where the Copyright Act slows and except where provided for he’ o puicatons ex cftwnre prosuced by Sandan Austala
‘gr Sardats New Zentand ray be reproduce, red 3 eareva sytem may fr or wansmiveby ary means whet prior ermsion
fh wating rom Standards Austala or Standards New Zealand. Permsnion may ve conditional onan sppropra aya payment. Assan
regums for pemsion and inforation on commercial aafvare royals shou be deta fo tho wee af Sandards Auslia New
‘Zaland roqlestShod be Geta 0 Standards New Zealna
{Upto 10 percent of ihe weical content pags of a Standard may be copied for use exclusively inhouse by purcascis of the
SGndard wiht payment of s voy or advice to Stags Ausaia of Sanda New Zealand
Incuson of copyright mate incompuer software programs is so permed wit ayy payment vid Such og re
ised eachsivelyrbuue by the creatas of the pogat
‘Cae shold be ake ensue that mate wedi rom the caret ein of he Stn and ta its pated whenever the Standard
[Simed or enised. Te number ad dat of the Standard shou Were be cea serie.
‘The use of maria in prict fn or in compute software programs to be used commer, with of without payment or in commercial
consis Subject tothe payeven ' oyaly Tas policy may be varied by Stndarés Atala Or Stneards New Zealand a any tre Accessed by KAV (Kellog Joint Venture) on 17 Dee 2001
3
CONTENTS
Page
SECTION 1 SCOPE AND GENERAL
11 SCOPE ...... Se eseeeecestede ta 4
1.2. REFERENCED DOCUMENTS |... : 4
1.3. DEFINITIONS ....... Si 4
1.4 SAFETY REQUIREMENTS faethe 5
SECTION 2 MATERIAL REQUIREMENTS
2.1 GENERAL ...... 4
22 CONDITIONS OF TEST
23° LIQUID PAINT . Reeser
244 APPLICATION PROPERTIES 2 22222.0202002.11
2.5 APPLIED FILM a
Nacaa
SECTION 3 PACKAGING AND LABELLING
3.1 PACKAGING
3.2 LABELLING .
APPENDICES.
A PURCHASING GUIDELINES ... .
B GUIDANCE ON THE USE AND APPLICATION OF HEAT RESISTING
PAINTS - u
MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD 13
REFERENCED DOCUMENTS... 6.600.600 00s 0e0000+ 218
PREPARATION OF TEST PANELS... sso ss sc cscs .17
moo -Aczested by KIV (Kellog Joint Venture) on 17 Dee 2001,
ASINZS 3750.3:1998 4
STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND
Australian/New Zealand Standard
Paints for steel structures
Part 3: Heat resisting—Exterior
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE This Standard sets out requirements for singke- and multi-component primers
and finishing coats For the protection of steel against atmospheric corrosion at elevated
temperatures. Paints specified in this Standard include those described as Paint References
27, 28, 29, 30, 31, and 35 in AS 2312.
Temperature resistance, colour range, gloss level and drying times vary significantly
according to type. These products can normally be applied by brush, roller or spray although
airless spray application is not suitable for some types. Abrasive blast cleaning is the
preferred method of surface preparation, however hand or power tool cleaning may be
acceptable for some products that are exposed at lower temperatures. Some products require
the application of heat to achieve their full resistance properties
NOTES:
1 These paints may be used for the appropriate systems detailed in AS 2312.
2 Appendix A provides recommendations on information which should be provided by the
purchaser at the time of enquiry or order.
3. Additional information on the use and application of heat resisting. paints is contained in
‘Appendix B.
4 Means for determining compliance with this Standard are given in Appendix C.
5 Some products covered by this Standard may be particularly prone to discolouration or damage
due to atmospheric contamination where there are acid or alkaline conditions, and the
manufacturer's advice should be sought
1.2 REFERENCED DOCUMENTS A list of the documents referred to in this Standard
is contained in Appendix D.
1.3. DEFINITIONS For the purpose of this Standard, the definitions given in AS 2310 and
those below apply.
NOTE: In New Zealand, NZS 2154 should be referred to in lieu of AS 2310.
1.3.1 Heat resisting paint—a paint which provides decorative appearance and corrosion
resistance to exterior steelwork which is subjected to sustained heat that may range from 100-
600°C.
1.3.2. Type 1 produet—a single-component silicone acrylic paint, classed as Paint
Reference 27 in AS 2312, which is available in a limited colour range and intended as a
finishing coat over inorganic zinc silicate primer. It provides a decorative appearance with
heat resistance to a continuous temperature of 200°C and for limited periods at 230°C.
1.3.3. Type 2 product—a single-component coumarone indene/oleoresinous aluminium
paint, classed as Paint Reference 28 in AS 2312 intended as a finishing coat for application
in two coats over oleoresinous zine dust primer (see Clause 1.3.4), providing weather
resistance and heat resistance 10 230°C
COPYRIGHT Accessed by KV (Kelog Joint Venture) on 17 Dae 2001,
5 ASINZS 3750.5:1994
1.3.4 Type 3 product—a two-component oleoresinous zine dust priming paint, generally
of grey colour, classed as Paint Reference 29 in AS 2312, for use under aluminium paint (sce
Clause 1.3.3), providing corrosion resistance and heat resistance to 230°C. It may also be
used as a two-coat system without a topcoat.
NOTE: Under some circumstances it may be used over hand or power tool cleaned surfaces.
1.3.5 Type 4 product—a two-component oleoresinous zinc dust graphite paint, generally
of grey colour, classed as Paint Reference 30 in AS 2312 for use as a two- or three-coat self-
finish system, providing both corrosion resistance and heat resistance for operating
temperatures up to 450°C. It may require heating to achieve full cure.
NOTE: Suitable for application to power or hand tool cleaned substrates but not suitable for acid
‘or alkaline environments.
1.3.6 Type 5 product—a single-component silicone paint, classed as Paint Reference 31
in AS 2312, available in a limited range of colours, usually aluminium or black, for
application in one or two coats over inorganic zine silicate primer, providing heat resistance
up to 480°C. Following normal air drying for 6 h, it requires the initial application of heat
to ensure proper hardness and weather resistance, following which it is suitable for
temperatures up to 480°C.
NOTE: With the exception of aluminium, such paints have a good resistance to acid and alkaline
environments. They may also be applied over silicone-based primer.
1.3.7 Type 6 product—an aluminium pigmented butyl titanate paint classed as Paint
Reference 35 in AS 2312, for application in two coats over inorganic zinc silicate primer,
providing heat resistance to 480°C. It may also be applied over aluminium metal spray for
heat resistance up to 650°C.
1.4 SAFETY REQUIREMENTS As these products are intended for industrial use,
reference to the appropriate regulatory requirements is necessary, particularly forthe packing,
labelling and use of the product.
NOTE: Appendix B Paragraph B3 provides additional information on safety precautions.
COPYRIGHT ‘Aonossed by KJV (Kllog Joint Ventre) on 17 Dee 2001,
SECTION 2 MATERIAL REQUIREMENTS
2.1 GENERAL The paint shall comply with the requirements detailed in Clauses 2.2 to
2.5. These properties and requirements are summarized in Table 1
2.2 CONDITIONS OF TEST Unless otherwise spe
test conditions apply:
(a) The test panel material and its preparation shall be in accordance with Appendix E.
(b) The size of test panels shall be as specified in Table 1
(©) Conditions for testing shall be in accordance with AS 1580.101.5,
(d)_ The spreading rate of paint shall be such that when applied by conventional spraying
it shall result in a dry film thickness specified on the manufacturer's data sheet for that
product, as determined by either AS 1580.108.1 or AS 1380.108.2.
(e) Conditions for air drying shall be in accordance with AS 1580.101.1
ied in this Standard, the following
2.3 LIQUID PAINT
2.3.1 Condition in container When examined in accordance with AS 1580.103.1 at the
time of delivery from the manufacturer or supplier, the liquid components of these paints
shall be free from gel, coarse particles, skin and foreign matter. They shall readily yield a
product of uniform consistency when manually incorporated in accordance with
AS 1580.211.
2.3.2 Density When determined in accordance with AS 1580.202.1, the density of the
paint shall be within 5 percent of the value of the manufacturer's specification.
2.3.3 Consistency When determined in accordance with the appropriate method chosen
from AS 1580.214.1, AS 1580.214.2, AS 1580.214.3, AS 1580.214.4 or AS 1580.214.5, the
consistency shall be within 5 percent of the manufacturer's specification.
2.3.4 Storage properties
23.4.1 Degree of settling When stored under cover in the original unopened containers
for 12 months from the date of manufacture, at a temperature of 23 43°C, the rating for
settling of the liquid components, when determined in accordance with AS 1580.211.1, shall
be not less than 6.
2.34.2 Re-incorporation afier storage When stored under cover in original unopened
containers for 12 months from the date of manufacture, at a temperature of 23 +3°C, and
tested in accordance with AS 1580.211.2, the liquid components shall be readily re-
incorporated, produce a paint of uniform consistency and be free from lumps, gel and other
defects.
2.4 APPLICATION PROPERTIES
2.4.1 General The applied film shall be free from defects when applied in accordance with
the manufacturer's recommended methods of application. (See Clauses 2.4.2 to 2.4.4.)
2.4.2. Brushing When applied to a vertical test panel in accordance with AS 1580.205.1,
the test paint shall exhibit satisfactory brushing properties and be free from visible defects.
2.4.3 Rolling When applied toa vertical test panel in accordance with AS 1580.205.3, the
test paint shall exhibit satisfactory rolling properties and be free from visible defects.
‘COPYRIGHT ‘Accoseed by KIV (Kellog Joint Ventre) on 17 Dae 2001
’ ASINZS 37503:1994
2.44 Spraying When thinned in accordance with the manufacturer's instructions and
applied to a vertical test panel in accordance with AS 1580.205.2, the test paint shall exhibit
‘00d spraying properties and be free from visible defects.
2.8 APPLIED FILM
2.5.1 Surface dry time When the paint has been applied to a steel test panel at the
appropriate dry film thickness and tested in accordance with AS 1580.401.1, it shall have a
surface dry time appropriate for the product type (refer to Appendix B).
2.5.2. Hard dry time When the paint has been applied to a steel test panel at the
appropriate dry film thickness, and tested in accordance with AS 1580.401.5, it shall have
‘a hard dry time appropriate for the product type (refer to Appendix B).
2.5.3 Heat resistance—Slow cooling When the paint or paint system is applied to a steel
test pane! at the appropriate dry film thickness and tested in accordance with AS 1580.407.1,
modified as stated below, at the maximum recommended temperature for that product type,
there shall be no cracking, pecling, flaking or other defect upon cooling. For the purpose of
this Clause, the oven heating period shall be increased from 4h to 24h, and the bend test
from AS 1580,402.1 is not required.
NOTE: Due to the characteristics of some of the paints included in heat resisting paint systems, the
bend test requirement of this test is not appropriate to most of the paint systems involved in this
Standard,
When the treated test panel is tested in accordance with AS 1580.408.2, a rating not greater
than I shall be achieved
NOTE: A rating of 0 implies no loss of adhesion
When tested in accordance with AS 1580.601.1 after completion of the heating period,
the test panel shall exhibit an approximate match to an unheated coated reference pancl.
2.5.4 Heat resistance—Thermal shock When the paint or paint system is applied to @
steel test panel at the appropriate dry film thickness and tested in accordance with
AS 1580.407.2 at the maximum recommended temperature for that product type. there shall
be no cracking or other defect upon cooling. For the purposes of this Clause, the bend test
from AS 1580.402.1 is not required.
NOTE: Due to the characteristics of some of the paints included in heat resisting paint systems, the
bend test requirement of this test is not appropriate to most of the paint systems involved in this
Standard.
2.5.5 Resistance to weathering The paint shall have a satisfactory resistance to
weathering. This shall be clearly and adequately demonstrated, by at least two documented
case histories that confirm satisfactory performance for a minimum of four years, at or near
its recommended maximum temperature, in a moderate or more severe environment,
A satisfactory performance is one where the paint (system) has not allowed any integrity
failure, i.e. no cracking, flaking, blistering or rusting and in a visual assessment of erosion,
there shall not be any grinning through. In addition, the general appearance, when assessed
in accordance with the intent of AS 1580.481.1.1, shall not have a numerical rating greater
than 2
NOTE: Because of the specialized performance characteristics of these paints, weathering tests in
accordance with AS 1580.457.1 are not considered appropriate due to their inability to simulate the
high temperatures involved.
2.5.6 Finish When a steel test panel prepared in accordance with Clause 2.4.4 is allowed
to air dry for 7 d and is examined in accordance with AS 1580.603.1, the film shall be of
‘uniform colour and appearance and be free of film defect.
coPyRIGHT ‘Accessed by KJV (Kellog Join Venture) on 17 Dee 2001
ASINZS 3750.3:1994 4
TABLE 1
SUMMARY OF RECOMMENDATIONS FOR HEAT RESISTING PAINTS,
Typical tot pane
Clause] Property | acceptable performance | ‘Test method Minimum
Peer oe Material | dimensions
‘om
231 | Condon in | Free oF ge ecuse pares, | AS 180.1081
container” | shin and foreign mater
Unierm consistency afer
raoul veincorporaion | AS 15802112 Nat 7
232 | Deni Within 5 percent of 1S 15802021 NAT =
manufacture’ specication
233 | Consiseney | Within 5 pereem of Aas 15802163 NAY -
mnaufacre’s specication | AS 18802142
fs 15602143
as 15602144
As 13002145
234 | Senge Seulemen 26 as 154021141 NAT 7
propeics | Uniform comsnency fee of | AS 15802112
{1z'monisy | humps glad ter defects
2 Appticaion | No mins, sca as ise02051 | seed | 800.300
roreries | excessive soughnes, or | AS 15802052
eiuiness AS 15802053
251 | sorte dry | Refer append B as tssoor1 | sweet | 130100
252 [Hard doy ine _| Refer appenei 6 as isoaois | ster | 150x100
253 | Hea resnance | No cracking. aking asiswoaors | seer | tooxso
slow cooling | peeing oF other defect
aaveson | £1 As tsa04082
Color Approximate match AS 15306011
254 | Hearrexitane | No cracking, aking asisnaora [sect | 100%50