Standard No.:	HG/T 5178-2017
English Name:	Anticorrosive coatings for metal surface under insulation
Chinese Name:	保温层下金属表面用防腐涂料
Professional Classification:	HG    Professional Standard - Chemistry
Issued by:	Ministry of Industry and Information Technology
Issued on:	2017-11-07
Implemented on:	2018-4-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	12500 words
Price(USD):	310.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the requirements, test method, inspection rules, marking, packaging and storage of anticorrosive coatings for metal surface under insulation. This standard is applicable to anticorrosive coatings and supporting system for external surface such as metal storage tanks, pipelines and equipment under insulation. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies. 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 1766-2008 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 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 6682-2008 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 - Pyknometer method GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values GB/T 8923.1-2011 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 9278 Temperatures and humidities for conditioning and testing of paint specimens. GB/T 9286-1998 Paints and varnishes - Cross cut test for films GB/T 9750 Marks for package of coating products GB/T 9793-2012 Thermal spraying - Metallic and other inorganic coating - Zinc, aluminum and their alloys GB/T 10699-1998 Calcium silicate insulation products GB/T 13288.1-2008 Preparation of steel substrates before application of paints and related products - Surface roughness characteristics of blast-cleaned substrates - Part 1: Specifications and definitions for ISO surface profile comparators for the assessment of abrasive blast-cleaned surfaces GB/T 13452.2-2008 Paints and varnishes - Determination of film thickness GB/T 13491 General rule for packing of coatings GB/T 13893-2008 Paints and varnishes - Determination of resistance to humidity - Continuous condensation GB/T 16995-1997 Determination of gel time of thermosetting powder coatings at a given temperature GB/T 20624.1-2006 Paints and varnishes - Rapid-deformation(impact resistance) tests - Part 1: Falling-weight test large-area indenter GB/T 30789.2-2014 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 2: Assessment of degree of blistering GB/T 30789.3-2014 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 3: Assessment of degree of rusting GB/T 30789.4-2015 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 4: Assessment of degree of cracking GB/T 30789.5-2015 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 5: Assessment of degree of flaking GB/T 30789.8-2015 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 defect GB/T 30790.6-2014 Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance test methods GB/T 31416-2015 Paints and varnishes - Determination of the pot - life of multicomponent coating systems - Preparation and conditioning of samples and guidelines for testing HG/T 4337-2012 Solventless liquid epoxy paints for steel water pipelines JG/T 25-1999 Determination for freeze - Thaw resistance of film of building coatings JC/T 618-2005 Methods of chemical analysis of thermal insulation materials for leachable chloride, fluoride, silicate and sodium lons 3 Requirements 3.1 Design requirements for coating supporting system Unless otherwise specified, the design of the coating supporting system shall meet the requirements of Table 1.

Foreword i 1 Scope 2 Normative references 3 Requirements 3.1 Design requirements for coating supporting system 3.2 Performance requirements of coating supporting system 3.3 Performance requirements of coating product 4 Test methods 4.1 Sampling 4.2 Test environment 4.3 Preparation of test template 4.4 Operation method 5 Inspection rules 5.1 Inspection classification 5.2 Judgment of test results 6 Marking, packaging and storage 6.1 Marking 6.2 Packaging 6.3 Storage Annex A (Normative) Multi-phase transverse cyclic corrosion test Annex B (Normative) Vertical cyclic corrosion test