HG/T 5060-2016 PDF in English
HG/T 5060-2016 (HG/T5060-2016, HGT 5060-2016, HGT5060-2016)
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Anticorrosive coatings for liquified natural gas (LNG) tanks
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Standards related to (historical): HG/T 5060-2016
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HG/T 5060-2016: PDF in English (HGT 5060-2016) HG/T 5060-2016
HG
INDUSTRY STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 87.040
G 51
Record number: 56425-2016
Anticorrosive coatings for liquefied natural gas (LNG) tanks
ISSUED ON: OCTOBER 22, 2016
IMPLEMENTED ON: APRIL 1, 2017
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Product categories ... 6
4 Requirements ... 6
5 Test method ... 12
6 Inspection rules ... 18
7 Marking, packaging, and storage ... 19
Anticorrosive coatings for liquefied natural gas (LNG) tanks
1 Scope
This standard specifies the product categories, requirements, test methods, inspection
rules, marking, packaging, and storage of anticorrosive coatings for liquefied natural
gas (LNG) storage tanks.
This standard applies to protective and decorative coatings for fixed-type liquefied
natural gas storage tanks such as shore-based liquefied natural gas receiving terminal
storage tanks, urban natural gas peak-shaving station storage tanks, and gas field
liquefied gas storage tanks.
2 Normative references
The following documents contain the provisions which, through normative reference in
this document, constitute the essential provisions of this document. For the dated
referenced documents, only the versions with the indicated dates are applicable to this
document; for the undated referenced documents, only the latest version (including all
the amendments) is applicable to this document.
GB/T 1724-1979 Methods of test for fineness of grind of paints
GB/T 1725-2007 Paints, varnishes and plastics - Determination of non-volatile-
matter content
GB/T 1728-1979 Methods of test for drying time of coatings of paints and putties
GB/T 1732-1993 Determination of impact resistance of film
GB/T 1733-1993 Determination of resistance to water of films
GB/T 1740-2007 Determination of resistance to heat and humidity of paint films
GB/T 1748-1979 Method of test for flexibility of putty coatings
GB/T 1766 Paints and varnishes - Rating schemes of degradation of coats
GB/T 1771-2007 Paints and varnishes - Determination of resistance to neutral salt
spray (fog)
GB/T 1865-2009 Paints and varnishes - Artificial weathering and exposure to
artificial radiation - Exposure to filtered xenon-arc radiation
GB/T 3186 Paints, varnishes and raw materials for paints and varnishes - Sampling
GB/T 5210-2006 Paints and varnishes - Pull-off test for adhesion
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 6742-2007 Paints and varnishes - Bend test (cylindrical mandrel)
GB/T 6750-2007 Paints and varnishes - Determination of density - Pycnometer
method
GB/T 8170-2008 Rules of rounding off for numerical values & expression and
judgement of limiting values
GB/T 8923.1 Preparation of steel substrates before application of paints and related
products - Visual assessment of surface cleanliness - Part 1: Rust grades and
preparation grades of uncoated steel substrates and of steel substrates after overall
removal of previous coatings
GB/T 9271 Paints and varnishes - Standard panels for testing
GB/T 9274-1988 Paints and varnishes - Determination of resistance to liquids
GB/T 9278 Temperatures and humidities for conditioning and testing of paint
specimens
GB/T 9750 Marks for package of coating products
GB/T 13288.1 Preparation of steel substrates before application of paints and
related products - Surface roughness characteristics of blast-cleaned substrates -
Part 1: Specification and definitions for ISO surface profile comparators for the
assessment of abrasive blast-cleaned surfaces
GB/T 13452.2 Paints and varnishes - Determination of film thickness
GB/T 13491 General rule for packing of coatings
HG/T 3668-2009 Zinc rich primer
HG/T 3792-2014 Crosslinking fluorocarbon resin coatings
HC/T 4755-2014 Polysiloxane coatings
JG/T 25-1999 Determination for freeze-thaw resistance of film of building coatings
JTJ 275-2000 Corrosion Prevention Technical Specifications for Concrete
Structures of Marine Harbour Engineering
intermediate coats and top coats are prepared according to the provisions in Table 8;
test panels for performances of coatings are prepared according to the provisions in
Table 11. The coating thickness is measured according to the provisions of GB/T
13452.2.
5.4 Operation methods
5.4.1 Operation methods for coating performances
5.4.1.1 State in container
Open the container and stir with a spatula or stirring rod, allowing there to be sediments
at the bottom of the container. If it is easy to mix evenly after stirring, it is rated as
"Uniform without hard lumps after stirring". The main agent and curing agent of two-
component coatings shall be inspected separately.
5.4.1.2 Non-volatile matter content
According to the provisions of GB/T 1725-2007, the main agent and curing agent of
the two-component coating are mixed for inspection. The baking temperature is
105 °C±2 °C, the baking time is 2 hours, and the sample is about 2 g.
5.4.1.3 Applicable period
Pre-adjust the temperature of each component of the coating to 23 °C±2 °C, and mix
evenly according to the proportion specified by the product (the middle value is taken
when the proportion of the diluent is a range); take out 300 mL and put it into a 500 mL
well-sealed iron can, place the can under the condition of 23 °C±2 °C; after the agreed
time, inspect the state in the container and the coating appearance according to the
requirements of 5.4.1.1 and 5.4.1.5. If the test results meet the requirements of 5.4.1.1
and 5.4.1.5, and there is no obstacle to the application of the coating during the panel-
making process, it is rated as "Pass".
5.4.1.4 Drying time
Carry out the test according to the regulations of GB/T 1728-1979, in which surface dry
test is carried out according to method B, hard dry test of putty is carried out according
to method C, and hard dry tests of other coatings (including dried type) are carried out
according to method A.
5.4.1.5 Coating appearance
The test panel is observed visually under scattered sunlight. If the coating is uniform
and free of defects such as sagging, floating, pinholes, cracking, and peeling, it is rated
as "Normal".
5.4.1.6 Bending test
The test is carried out according to the provisions of GB/T 6742-2007.
5.4.1.7 Flexibility
The test is carried out according to the provisions of GB/T 1748-1979.
5.4.1.8 Impact resistance
The test is carried out according to the provisions of GB/T l732-l993.
5.4.1.9 Density
The test is carried out according to the provisions of GB/T 6750-2007. The components
of the product (except the diluent) are mixed according to the proportion specified by
the manufacturer and then tested.
5.4.1.10 Fineness
The test is carried out according to the provisions of GB/T 1724-1979. The two-
component coatings shall be inspected immediately after the main agent and curing
agent are mixed.
5.4.1.11 Fluorine content in the base material
The test shall be carried out according to the provisions of Appendix A of HG/T 3792-
2014.
5.4.1.12 Silicon-oxygen bond content in the base material
The test shall be carried out according to the provisions of Appendix A of HG/T 4755-
2014.
5.4.1.13 Metal zinc content in non-volatile matter
The test shall be carried out according to the provisions of 5.7 in HG/T 3668-2009.
5.4.2 Operation methods for coating system performances
5.4.2.1 General provisions
Unless otherwise specified, the reagents used are all chemically pure and above, the
water used is third-grade water in accordance with the provisions of GB/T 6682, and
the test solution is adjusted to the test temperature before the test.
5.4.2.2 Coating appearance
5.4.2.7 Chloride ion permeability resistance
The test shall be carried out according to Appendix C.2 of JTJ 275-2000.
5.4.2.8 Humidity and heat cycle resistance
The test shall be carried out according to the regulations of JG/T 25-1999, a total of 10
cycles (a cycle consists of soaking in water at 23 °C±2 °C for 18 hours, freezing at -
20 °C±2 °C for 3 hours, and baking at 50 °C±2 °C for 3 hours). After the cycles are
complete, observe visually under scattered sunlight. If 2 of the 3 test panels of Class A
products do not show any coating defects such as blistering, cracking, peeling, dusting,
obvious discoloring, and obvious dulling, it is rated as "no abnormality"; If 2 of the 3
test panels of Class B products do not show any coating defects such as rusting,
blistering, cracking, peeling, dusting, obvious discoloring, and obvious dulling, it is
rated as "no abnormality". If any of the above coating defects occurs, it shall be
described according to GB/T 1766.
5.4.2.9 Moisture and heat resistance
The test shall be carried out according to the provisions of GB/T 1740-2007. If
blistering, rusting, peeling, or other coating defect occurs, it shall be described
according to GB/T 1766.
5.4.2.10 Salt spray resistance
The test shall be carried out according to the provisions of GB/T 1771-2007 (the test
panel is not scribed). If blistering, rusting, peeling, or other coating defect occurs, it
shall be described according to GB/T 1766.
5.4.2.11 Resistance to artificial weathering
The test shall be carried out according to the provisions of Cycle A in GB/T 1865-2009.
The evaluation of the results shall be carried out according to GB/T 1766.
6 Inspection rules
6.1 Inspection classification
6.1.1 Product inspection is divided into factory inspection and type inspection.
6.1.2 The factory inspection items include the state in the container, non-volatile matter
content, drying time, applicable period, density, and coating appearance.
6.1.3 Type inspection items include all technical requirements listed in this standard.
Under normal production conditions, heat and humidity resistance and salt spray
resistance are tested every 3 years, resistance to artificial weathering is tested every 5
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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