GB/T 31415-2015
Paints and varnishes.Performance requirements for protective paint systems for offshore and related structures (English Version)

Standard No.

GB/T 31415-2015

Language

Chinese, Available in English version

Release Date

2015

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 31415-2015

Scope

This standard specifies the performance requirements for protective coating systems used on offshore structures and related structures, ie those structures exposed to the marine atmosphere and immersed in salt or brackish water. These structures are exposed to the environment of C5-M corrosiveness level and Im2 immersion level defined in ISO 12944-2. The special stresses in these corrosive environments are described in 4.3 and Appendix B of ISO 12944-2:1998. This standard is also applicable to other building structures using paint or protective paint systems complying with this standard. This standard focuses on high durability coating systems in order to achieve the purpose of minimizing maintenance costs, and thus reduce safety expenditures and environmental impact. This standard specifies additional test requirements in addition to those used in ISO 12944-6 for corrosivity class C5-M. Therefore, coating systems that meet the high durability requirements of class C5-M in ISO 12944-6 may not meet the requirements of this standard and may require further testing. The applicable temperature range of these coating systems is generally -20 ℃ ~ 80 ℃, and the performance test is also to confirm the adaptability of the coating system in this temperature range. Use of coating systems outside this temperature range should be approved by the end user. These approvals shall include testing at suitable temperatures. Coating systems for immersion conditions (Im2) are intended for ambient temperatures up to 50 °C. For higher ambient temperatures, specific evaluation and performance descriptions are required. The performance requirements selected for investigation should be considered in combination with the design parameters of cathodic protection. This standard includes: - test methods for determining the composition of the different components of protective paint systems; - laboratory performance test methods for assessing the expected durability of protective paint systems; - guidelines for evaluating the results of performance tests.

GB/T 31415-2015 Referenced Document

• GB/T 13912-2002 Metallic coatings--Hot dip galvanized coatings on fabricated iron and steel articles--Specifications and test methods
• GB/T 1725-2007 Paints,varnishes and plastics.Determination of non-volatile-matter content
• GB/T 21862.2-2008 Paints and varnishes.Determination of density.Part 2:Immersed body(plummet)method
• GB/T 21862.3-2008 Paints and varnishes.Determination of density.Part 3:Oscillation method
• GB/T 21862.4-2008 Paints and varnishes.Determination of density.Part 4:Pressure cup method
• GB/T 23987-2009 Paints and varnishes.Exposure of coatings to artificial weathering.Exposure to fluorescent UV lamps and water
• GB/T 5208-2008 Determination of flash point.Rapid equilibrium closed cup method
• GB/T 5210-2006 Paints and varnishes. Pull-off test for adhesion
• GB/T 6750-2007 Paints and varnishes.Determination of density.Pyknometer method
• GB/T 6753.2-1986 Paints and varnishes--Surface-drying test--Ballotini method
• GB/T 9271-2008 Paints and varnishes.Standard panels for testing
• GB/T 9272-2007 Paints and varnishes.Determination of percentage volume of non-volatile matter by measuring the density of a dried coating
• GB/T 9278-2008 Temperatures and humidities for conditioning and tesing of paint specimens
• GB/T 9793-2012 Thermal spraying.Metallic and other inorganic coatings.Zinc,aluminum and their alloys
• ISO 2812-2 Paints and varnishes — Determination of resistance to liquids — Part 2: Water immersion method*， 2018-11-06 Update
• ISO 3549 Zinc dust pigments for paints*， 2024-01-01 Update
• ISO 4628 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial

GB/T 31415-2015 history

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