1.0.1 This code is applicable to the external corrosion protection for non-stereotype equipment manufactured by carbon steel, cast iron and low alloy steel, pipe (including overhead, trench and burying laying) and steel structure (including platform, support, handrail and staircase).
1.0.2 The corrosion protection methods of this code include nonmetallic coating and cladding; exclude other corrosion protection method such as cathodic protection.
1.0.3 The corrosion protection design for the coating of external surface of chemical equipment and pipe shall be carried out according to this code. The plan shall be selected by the designer according to specific circumstances (economic index and corrosion protection effect) in engineering design. The new corrosion protection material and corrosion protection structure may only be adopted after scientific experiment and practice certification with good effect or appraisal by the department concerned.
1.0.4 All raw materials must be in accordance with the relevant technical index of the relevant standard or this code and shall be provided with product certificate and inspection information. The materials shall be used within specified validity period; the overdue materials may only be used after qualified inspection.
1.0.5 The corrosion protection construction must be carried out according to the construction instruction of the national current relevant specifications and corrosion protection material manufacturer.
Contents
1 General Provisions
2 Surface Treatment for External Corrosion Protection of Equipment, Pipe and Steel Structure
2.1 Surface Treatment Grade
2.2 Surface Treatment Grade Requirements of Anticorrosive Coatings
2.3 Protection after Surface Treatment
3 Coating and Mark for External Corrosion Protection of Equipment, Pipe and Steel Structure
3.1 Classification of Air Corrosion Degree for Steel Piece Surface
3.2 Selection of Anticorrosive Paint
3.3 Color and Mark for External Surface of Equipment, Pipe and Steel Structure
4 External Corrosion Protection of Buried Equipment and Pipe
4.1 General Requirements
4.2 Classification of Soil Corrosion Grade
4.3 Selection and Structure of Anticorrosive Coating
Appendix I Classification of Corrosive Gas
Appendix II Characteristic of Particulates (including Salt, Aerosols and Dust) in the Air
Appendix III Matching Example of Paint
Appendix IV Range of High-temperature, High-pressure, Combustible, Explosive and Toxic Medium
Appendix V Legends of Pipe Painting, Color Circle and Flow Direction Mark
Appendix VI Examples of Pipe Painting, Color Circle and Flow Direction Mark
Appendix VII Safety Distance of Buried Equipment and Pipe with AC Grounding Body and Surface Electrical Equipment
Appendix VIII Soil Corrosivity Grade of the Area with Complex Corrosion Factor
Appendix IX Quality Index for Anticorrosive Asphalt of Pipe
Appendix X Quality Index of No. 10 Building Asphalt (GB 494-75)
Appendix XI Performance and Specification of Medium Alkali Glass Cloth
Appendix XII Performance and Specification of Polyvinyl Choride Industrial Film
Appendix XIV Primer Performance of Anticorrosive Coating of Polyethylene Tape
Appendix XV Performance of Anticorrosive Coating of Chlorosulfonated Polyethylene
Standard
HG/T 20679-1990 Code for the Design of External Corrosion Protection for Chemical Equipment and Pipe (English Version)
Standard No.
HG/T 20679-1990
Status
superseded
Language
English
File Format
PDF
Word Count
8000 words
Price(USD)
200.0
Implemented on
1991-5-1
Delivery
via email in 1 business day
Detail of HG/T 20679-1990
Standard No.
HG/T 20679-1990
English Name
Code for the Design of External Corrosion Protection for Chemical Equipment and Pipe
1.0.1 This code is applicable to the external corrosion protection for non-stereotype equipment manufactured by carbon steel, cast iron and low alloy steel, pipe (including overhead, trench and burying laying) and steel structure (including platform, support, handrail and staircase).
1.0.2 The corrosion protection methods of this code include nonmetallic coating and cladding; exclude other corrosion protection method such as cathodic protection.
1.0.3 The corrosion protection design for the coating of external surface of chemical equipment and pipe shall be carried out according to this code. The plan shall be selected by the designer according to specific circumstances (economic index and corrosion protection effect) in engineering design. The new corrosion protection material and corrosion protection structure may only be adopted after scientific experiment and practice certification with good effect or appraisal by the department concerned.
1.0.4 All raw materials must be in accordance with the relevant technical index of the relevant standard or this code and shall be provided with product certificate and inspection information. The materials shall be used within specified validity period; the overdue materials may only be used after qualified inspection.
1.0.5 The corrosion protection construction must be carried out according to the construction instruction of the national current relevant specifications and corrosion protection material manufacturer.
Contents of HG/T 20679-1990
Contents
1 General Provisions
2 Surface Treatment for External Corrosion Protection of Equipment, Pipe and Steel Structure
2.1 Surface Treatment Grade
2.2 Surface Treatment Grade Requirements of Anticorrosive Coatings
2.3 Protection after Surface Treatment
3 Coating and Mark for External Corrosion Protection of Equipment, Pipe and Steel Structure
3.1 Classification of Air Corrosion Degree for Steel Piece Surface
3.2 Selection of Anticorrosive Paint
3.3 Color and Mark for External Surface of Equipment, Pipe and Steel Structure
4 External Corrosion Protection of Buried Equipment and Pipe
4.1 General Requirements
4.2 Classification of Soil Corrosion Grade
4.3 Selection and Structure of Anticorrosive Coating
Appendix I Classification of Corrosive Gas
Appendix II Characteristic of Particulates (including Salt, Aerosols and Dust) in the Air
Appendix III Matching Example of Paint
Appendix IV Range of High-temperature, High-pressure, Combustible, Explosive and Toxic Medium
Appendix V Legends of Pipe Painting, Color Circle and Flow Direction Mark
Appendix VI Examples of Pipe Painting, Color Circle and Flow Direction Mark
Appendix VII Safety Distance of Buried Equipment and Pipe with AC Grounding Body and Surface Electrical Equipment
Appendix VIII Soil Corrosivity Grade of the Area with Complex Corrosion Factor
Appendix IX Quality Index for Anticorrosive Asphalt of Pipe
Appendix X Quality Index of No. 10 Building Asphalt (GB 494-75)
Appendix XI Performance and Specification of Medium Alkali Glass Cloth
Appendix XII Performance and Specification of Polyvinyl Choride Industrial Film
Appendix XIV Primer Performance of Anticorrosive Coating of Polyethylene Tape
Appendix XV Performance of Anticorrosive Coating of Chlorosulfonated Polyethylene
