GB/T 30790.1-2014 English PDF (GB/T30790.1-2014)

GB/T 30790.1-2014: Paints and varnishes -- Corrosion protection of steel structures by protective paint systems -- Part 1: General introduction
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GB/T 30790.1-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 87.020
G 50
Paints and varnishes – Corrosion protection of
steel structures by protective paint systems -
Part 1. General introduction
(ISO 12944-1.1998, MOD)
ISSUED ON. JULY 8, 2014
IMPLEMENTED ON. DECEMBER 1, 2014
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 7
3 Terms and definitions ... 8
4 General considerations and requirements ... 9
5 Health and safety and environmental protection ... 10
6 Information on the other parts of GB/T 30790 ... 11
Annex A (Informative) Guidelines for using ISO 12944 for a given project 13
Annex B (Informative) Technical differences between this Part and ISO
12944-1.1998 and their reasons ... 14
Bibliography ... 15
Foreword
GB/T 30790, Paints and varnishes – Corrosion protection of steel structures by
protective paint systems, comprises 8 parts.
-- Part 1. General introduction;
-- Part 2. Classification of environments;
-- Part 3. Design considerations;
-- Part 4. Types of surface and surface preparation;
-- Part 5. Protective paint systems;
-- Part 6. Laboratory performance test methods;
-- Part 7. Execution and supervision of paint work;
-- Part 8. Development of specification for new work and maintenance.
This Part is Part 1 of GB/T 30790.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part was redrafted by adopting ISO 12944-1.1998, Paints and varnishes –
Corrosion protection of steel structures by protective paint systems – Part 1. General
introduction.
This Part has technical differences from ISO 12944-1.1998. The clauses concerning
these differences are marked with vertical single lines (|) in the page margins. Annex
B gives the list of corresponding technical differences and their reasons.
This Part was proposed by China Petroleum and Chemical Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee 5 on Paints
and Pigments of Standardization Administration of China (SAC/TC 5).
The drafting organizations of this Part. CNOOC Changzhou Paint and Chemicals
Research Institute, Jotun Paint (Zhangjiagang) Co., Ltd., Beijing BIAM New Materials
and Technological Engineering Co., Ltd., Yung Chi Paint and Varnish MFG Co., Ltd.,
Shenzhen Grandland Decoration Group Co., Ltd., AkzoNobel Protective Paint (Suzhou)
Co., Ltd., Marine Chemical Research Institute, COSCO Kansai Paint and Chemicals
Co., Ltd., Shandong Puntium Paint Co., Ltd., Hempel (China) Co., Ltd., Zhejiang
Feijing Paint Co., Ltd., Beijing Hongshi Paint Co., Ltd., Yejian New Material Co., Ltd.,
Taicang High Polymer Materials Research and Development Center Co., Ltd.
Paints and varnishes – Corrosion protection of
steel structures by protective paint systems -
Part 1. General introduction
1 Scope
1.1 GB/T 30790 deals with the corrosion protection of steel structures by protective
paint systems.
1.2 GB/T 30790 covers only the corrosion-protective function of paint systems. Other
protective functions, like the protection against.
-- microorganisms (marine fouling, bacteria, fungi, etc.),
-- chemicals (acids, alkalis, organic solvents, gases, etc.),
-- mechanical action (abrasion, etc.) and
-- fire
are not covered by GB/T 30790.
1.3 The field of application is characterized by.
-- the type of structure,
-- the type of surface and surface preparation,
-- the type of environment,
-- the type of protective paint system,
-- the type of work and
-- the durability of the protective paint system.
Although GB/T 30790 does not cover all types of structure, surface and surface
preparation, it may, by agreement, also be applied to those cases which are not
covered by the standard.
The various aspects of the field of application are described in more detail in 1.3.1 to
-- coatings of more than 2 mm dry-film thickness,
-- linings of tanks,
-- products for the chemical treatment of surfaces (e.g. phosphating solutions).
1.3.5 Type of work
GB/T 30790 covers both new work and maintenance.
1.3.6 Durability of the protective paint system
GB/T 30790 considers three different durability ranges (low, medium and high). See
3.5 and Clause 4.
The durability range is not a “guarantee time”.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced documents (including all
amendments) applies to this document.
ISO 4628-1, Paints and varnishes – Evaluation of degradation of paint coatings –
Designation of intensity, quantity and size of common types of defect – Part 1.
General principles and rating schemes.
ISO 4628-2, Paints and varnishes – Evaluation of degradation of paint coatings –
Designation of intensity, quantity and size of common types of defect – Part 2.
Designation of degree of blistering.
ISO 4628-3, Paints and varnishes – Evaluation of degradation of paint coatings –
Designation of intensity, quantity and size of common types of defect – Part 3.
Designation of degree of rusting.
ISO 4628-4, Paints and varnishes – Evaluation of degradation of paint coatings –
Designation of intensity, quantity and size of common types of defect – Part 4.
Designation of degree of cracking.
ISO 4628-5, Paints and varnishes – Evaluation of degradation of paint coatings –
Designation of intensity, quantity and size of common types of defect – Part 5.
Designation of degree of flaking.
EN 10025-2, Hot-rolled products of non-alloy structural steels – Technical delivery
conditions.
-- measures against harmful effects of fumes, dust, vapours and noise, as well as fire
hazards;
-- protection of the body, including the eyes, the skin, the ears and the respiratory system;
-- protection of water and soil during corrosion protection work;
-- recycling of materials and waste disposal.
6 Information on the other parts of GB/T 30790
6.1 GB/T 30790.2 describes the corrosion stresses produced by the atmosphere, by
different types of water and by soil. It defines atmospheric-corrosivity categories and
indicates the corrosion stresses to be expected in situations where steel structures are
immersed in water or buried in soil. The corrosion stresses to which a steel structure
is exposed represent one essential parameter governing the selection of appropriate
protective paint systems in accordance with GB/T 30790.5.
6.2 GB/T 30790.3 gives information on basic design criteria for steel structures for the
purpose of improving their resistance to corrosion. It gives examples of suitable and
unsuitable designs, indicating, with the help of diagrams, which structural elements
and combinations of elements are likely to cause accessibility problems during surface
preparation work and when applying, inspecting and maintaining paint systems. In
addition, design features which will facilitate the handling and transport of steel
structures are discussed.
6.3 GB/T 30790.4 describes different types of surface to be protected and gives
information on mechanical, chemical and thermal surface preparation methods. It
deals with surface preparation grades, surface profile (roughness), assessment of
prepared surfaces, temporary protection of prepared surfaces, preparation of
temporarily protected surfaces for further coatings, preparation of existing metal
coatings, and environmental aspects. As far as possible, reference is made to the basic
National Standards on the surface preparation of steel substrates before application of
paints and related products. GB/T 30790.4 is intended to be read in conjunction with
GB/T 30790.5 and GB/T 30790.7.
6.4 GB/T 30790.5 describes different generic types of paints on the basis of their
chemical composition and the type of film formation process. It gives examples of
various protective paint systems that have proved suitable for structures exposed to
corrosive stresses and corrosivity categories described in GB/T 30790.2, reflecting
current knowledge on a world-wide scale. GB/T 30790.5 is intended to be read in
conjunction with GB/T 30790.6.
6.5 GB/T 30790.6 specifies laboratory test methods that are to be used when the
Annex A
(Informative)
Guidelines for using ISO 12944 for a given project
In order to ensure effective corrosion protection, it is important that suitable
specifications are written for the project (GB/T 30790.8), taking the following items as
the basis.
a) Analyse or estimate the corrosivity of the environment in the area where the
structure is located or is to be located (GB/T 30790.2).
b) Establish any special conditions which may affect the choice of paint system to
be used (GB/T 30790.5).
c) Examine the design of the structure and make sure that corrosion traps have
been avoided and adequate access has been provided for corrosion protection
work. Avoid galvanic corrosion by insulating dissimilar metals from each other
(GB/T 30790.3).
d) For maintenance painting, assess the condition of the surface to be treated (GB/T
30790.4).
e) Identify those paint systems with the required durability from those listed as being
suitable for the relevant environment (GB/T 30790.5), or from results of
laboratory performance testing if no long-term experience is available (GB/T
30790.6).
f) Select, from the paint systems identified, the optimum one, taking into
consideration the method of surface preparation which will be used (GB/T
30790.4).
g) Make sure that damage to the environment and all health and safety risks are
minimized (GB/T 30790.1, GB/T 30790.8).
h) Draw up a plan of work and select a method of application (GB/T 30790.7).
i) Establish a programme of inspections to be carried out during and after the work
(GB/T 30790.7, GB/T 30790.8).
j) Establish a maintenance programme covering the whole service life of the
structure.
NOTE. For detailed planning, see GB/T 30790.8, annexes C and D.
GB/T 30790.1-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 87.020
G 50
Paints and varnishes – Corrosion protection of
steel structures by protective paint systems -
Part 1. General introduction
(ISO 12944-1.1998, MOD)
ISSUED ON. JULY 8, 2014
IMPLEMENTED ON. DECEMBER 1, 2014
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 7
3 Terms and definitions ... 8
4 General considerations and requirements ... 9
5 Health and safety and environmental protection ... 10
6 Information on the other parts of GB/T 30790 ... 11
Annex A (Informative) Guidelines for using ISO 12944 for a given project 13
Annex B (Informative) Technical differences between this Part and ISO
12944-1.1998 and their reasons ... 14
Bibliography ... 15
Foreword
GB/T 30790, Paints and varnishes – Corrosion protection of steel structures by
protective paint systems, comprises 8 parts.
-- Part 1. General introduction;
-- Part 2. Classification of environments;
-- Part 3. Design considerations;
-- Part 4. Types of surface and surface preparation;
-- Part 5. Protective paint systems;
-- Part 6. Laboratory performance test methods;
-- Part 7. Execution and supervision of paint work;
-- Part 8. Development of specification for new work and maintenance.
This Part is Part 1 of GB/T 30790.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part was redrafted by adopting ISO 12944-1.1998, Paints and varnishes –
Corrosion protection of steel structures by protective paint systems – Part 1. General
introduction.
This Part has technical differences from ISO 12944-1.1998. The clauses concerning
these differences are marked with vertical single lines (|) in the page margins. Annex
B gives the list of corresponding technical differences and their reasons.
This Part was proposed by China Petroleum and Chemical Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee 5 on Paints
and Pigments of Standardization Administration of China (SAC/TC 5).
The drafting organizations of this Part. CNOOC Changzhou Paint and Chemicals
Research Institute, Jotun Paint (Zhangjiagang) Co., Ltd., Beijing BIAM New Materials
and Technological Engineering Co., Ltd., Yung Chi Paint and Varnish MFG Co., Ltd.,
Shenzhen Grandland Decoration Group Co., Ltd., AkzoNobel Protective Paint (Suzhou)
Co., Ltd., Marine Chemical Research Institute, COSCO Kansai Paint and Chemicals
Co., Ltd., Shandong Puntium Paint Co., Ltd., Hempel (China) Co., Ltd., Zhejiang
Feijing Paint Co., Ltd., Beijing Hongshi Paint Co., Ltd., Yejian New Material Co., Ltd.,
Taicang High Polymer Materials Research and Development Center Co., Ltd.
Paints and varnishes – Corrosion protection of
steel structures by protective paint systems -
Part 1. General introduction
1 Scope
1.1 GB/T 30790 deals with the corrosion protection of steel structures by protective
paint systems.
1.2 GB/T 30790 covers only the corrosion-protective function of paint systems. Other
protective functions, like the protection against.
-- microorganisms (marine fouling, bacteria, fungi, etc.),
-- chemicals (acids, alkalis, organic solvents, gases, etc.),
-- mechanical action (abrasion, etc.) and
-- fire
are not covered by GB/T 30790.
1.3 The field of application is characterized by.
-- the type of structure,
-- the type of surface and surface preparation,
-- the type of environment,
-- the type of protective paint system,
-- the type of work and ...