GB/T 31415-2015: Paints and varnishes -- Performance requirements for protective paint systems for offshore and related structures

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Scope

This Standard deals with performance requirements for protective paint systems for
offshore and related structures (i.e. those exposed to the marine atmosphere, as well
as those immersed in sea or brackish water). Such structures are exposed to
environments of corrosivity category C5-M and immersion category Im2 as defined in
ISO 12944-2, with special stresses as given in Subclause 4.3 and Annex B of ISO
12944-2.1998. This Standard can also be used for other structures, provided that the
paints or protective paint systems selected comply with this Standard.
This Standard places emphasis on high-durability paint systems, with the aim of
minimizing maintenance and hence reducing safety considerations and environmental
impact. It specifies additional test requirements over and above those specified for
corrosivity category C5-M in ISO 12944-6. Hence, a system fulfilling the requirements
for C5-M high durability in ISO 12944-6 will not necessarily fulfil the requirements of
this Standard and might thus need further testing to do so.
The temperature range applicable for these paint systems is normally between − 20 °C
and + 80 °C, and the performance testing is aimed at verifying suitability of the paint
systems for this temperature range. The use of paint systems outside this temperature
range shall be subject to agreement by the end user. Such agreement may include
testing at the applicable temperatures.
The paint systems for submerged service (Im2) are aimed at ambient operating
temperatures up to a maximum of 50 °C. For higher operating temperatures, specific
evaluation and performance documentation is needed. The selection of performance
requirements should be considered in conjunction with the cathodic protection design
parameters.
This Standard includes.
‐ the test methods to be used to determine the composition of the separate
components of the protective paint system;
‐ the laboratory performance test methods for the assessment of the likely durability
of the protective paint system;

Basic Data

Standard ID	GB/T 31415-2015 (GB/T31415-2015)
Description (Translated English)	Paints and varnishes -- Performance requirements for protective paint systems for offshore and related structures
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G50
Classification of International Standard	87.020
Word Count Estimation	25,230
Date of Issue	2015-05-15
Date of Implementation	2015-10-01
Quoted Standard	GB/T 23987-2009; ISO 1461; ISO 1514; ISO 2063; ISO 2811-1; ISO 2811-2; ISO 2811-3; ISO 2811-4; ISO 2812-2; ISO 3233; ISO 3251; ISO 3270; ISO 3549; ISO 3679; ISO 4624; ISO 8501-1; ISO 8503-1; ISO 8503-2; ISO 9117-3; ISO 9227; ISO 12944-2-1998; ISO 12944-4; ISO 12944-5; ISO 12944-6; ISO 12944-8; ISO 14680-2; ISO 15711-2003; ISO 19840; ISO 4628-2; ISO 4628-3; ISO 4628-4; ISO 4628-5; ISO 4628-6
Adopted Standard	ISO 20340-2009, IDT
Regulation (derived from)	National Standard Announcement 2015 No. 15
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies the offshore construction and related structures (ie, those exposed to the marine atmosphere and immersed in salt water or brackish water in the structure) of the system performance requirements for protective Xu material used. These structures are exposed to C5-M corrosion grade and Im2 impregnated grades defined in ISO 12944-2 environment, ISO 12944-2: 1998 4.3 and Appendix B to these corrosive environment of special stress has been described. This Standard is also applicable to other structures used in line with this standard paint or protective coating systems. These coating system suitable temperature range is generally -20��C ~ 80��C, while the performance test is to confirm coating system adaptability in this temperature range. Used outside of this temperature range the coating system should be the end-user acceptance. The accreditation should include testing at appropriate temperatures.