Paint color for pipelines and equipment

Basic identification colors, code indicators, and safety signs for industrial pipelines GB7231-2003. Source of the article: Fujian Labor Protection Network. Basic identification colors and code indicators and safety signs for industrial pipelines. Effective as of October 1, 2003. Issuing authority: **General Administration of Quality Supervision, Inspection and Quarantine. Proposing authority: **Work Safety Bureau of the National Committee of the Chinese People’s Political Consultative Conference. Drafting authority: Shanghai Institute of Labor Protection Science. Approving authority: **Standardization Bureau. Preface: Chapter 4.4.1 of this standard； Sections 6.1 and 6.2 of Chapter 6 are mandatory, while the rest are recommended. 　　This standard represents the first revision to GB7231-1987 \"Basic identification colors and symbols for industrial pipelines\". 　　This standard was revised with reference to German DIN 2403-1984 \"Identification of pipes according to the fluid medium\" and Japanese JIS 9102-1987 \"Identification and marking of piping systems\". 　　To facilitate the identification of substances in industrial pipelines, the number of basic identification colors specified in this standard has been increased from seven to eight, while the methods for marking substances in pipelines have been raised from two to five. 　　Appendix A of this standard is an appendix to the standard. 　　As of the date of implementation, this standard replaces GB7231-1987. 　　This standard was proposed and is under the responsibility of the Safety Production Bureau of the **Commission of Economy and Trade. 　　The organization responsible for drafting this standard is the Shanghai Institute of Labor Protection Science. 　　The entity that participated in the drafting of this standard is Shanghai Chlor-Alkali Chemical Co., Ltd. 　　Main drafters of this standard: Shen Guoding, Zheng Baoqin, Wu Gaoxing. 　1 Scope This standard specifies the basic identification colors, identification symbols, and safety markings for industrial pipelines. 　　This standard applies to pipelines for transporting gases and liquids that are not buried underground in industrial production. 　　2 Referenced Standards The provisions contained in the following standards become part of this standard by being referenced herein. At the time of publication of this standard, all versions listed are valid. All standards will be revised, and those using this standard should consider the possibility of using the latest versions of the following standards. 　　GB2893-1982 Safety Colors GB13495-1992 Fire Safety Signs GB13690-1992 Classification and Marking of Commonly Used Hazardous Chemicals 3 Definitions The following definitions are adopted in this standard. 　　3.1 Identification colors: Colors used to identify the type of substance inside industrial pipelines. 　　3.2 Code indications 　　Symbols used to identify the name and state of the substances within industrial pipelines. 　　3.3 Danger label: Indicates that the substance within the industrial pipeline is a hazardous chemical. 　　3.4 Fire label: Indicates that the substance contained within industrial pipes is intended for use in extinguishing fires. 4 Basic Identification Colors 4.1 Based on the general properties of the substances contained in the pipes, they are classified into eight categories; eight basic identification colors are specified accordingly, along with their corresponding color standard numbers and color samples (see Table 1). 　　4.2 Basic identification color marking methods For the basic identification color marking of industrial pipelines, users shall select from the following five methods. Examples of applications are provided in Appendix A (the standard appendix). 　　a) Marking along the entire length of the pipeline ； 　　b) Mark on the pipeline with color rings 150 mm wide ； 　　c) Identify on the pipeline with rectangular color-coded tags ； 　　d) Identify on the pipeline with arrowed rectangular colored labels ； 　　e) Identify on the pipeline with attached identification color tags. 　　Table 1: Eight basic identification colors, color samples, and color standard numbers. Figure 1: Eight basic identification colors, color samples, and color standard numbers. 4.3 When using the methods b), c), d), and e) in 4.2, the minimum distance between two identifiers should be 10 m. 　　4.4 The minimum size of the signs in c), d), and e) of 4.2 shall be determined based on the color that can be clearly observed and recognized. 　　4.5 When pipes are identified using the basic identification color methods specified in b), c), d), and e) of 4.2, the locations where such identification is to be applied should include the starting points and ending points of all pipes, intersection points, turns, valves, both sides of wall penetrations, as well as other parts of the pipes that require identification. 　　5 Identification symbols The identification symbols for industrial pipelines consist of the name of the substance, the flow direction, and the main process parameters. Such markings shall meet the following requirements: 5.1 Marking of the substance name a) Full name of the substance. For example: nitrogen, sulfuric acid, methanol. 　　b) Chemical molecular formula. For example: N2, H2SO4, CH3OH. 　　5.2 Indication of the flow direction of substances a) The flow direction of substances within industrial pipelines is indicated by arrows [see figure a) in Appendix A, Figure A1]; if the flow direction is two-way, it is indicated by a double arrow [see figure b) in Appendix A, Figure A1]. 　　b) When the identification methods for the basic identifying colors use d) and e) in 4.2, the direction indicated by the sign shall be used to show the flow direction of the substance within the pipe [see figures c] and d) in Appendix A, Figure A1]; if the flow direction of the substance in the pipe is two-way, the direction indicated by the sign should also be two-way [see figure e) in Appendix A, Figure A1]. 　　5.3 The identification of key process parameters such as the pressure, temperature, and flow rate of the material can be determined by the user as needed. 　　5.4 The minimum font size for letters and numbers in 5.1 and 5.3, as well as the minimum dimensions of arrows in 5.2, shall be determined so that the symbols can be clearly observed and recognized. 　　6 Safety Markings 　　6.1 Hazard Markings 　　a) Scope of application: For substances contained within pipelines that fall under the category of hazardous chemicals as listed in GB13690, hazard markings must be applied to such pipelines. 　　b) Representation method: Apply a 150 mm wide yellow strip on the pipe, and apply black color rings or bands 25 mm wide on each side of the yellow strip (see Appendix A); the range of safety colors shall comply with the provisions of GB2893. 　　c) To indicate a location: on or near the identifier of the basic identifying color. 　　6.2 Fire protection markings The special fire protection pipelines installed in industrial production shall comply with the provisions of GB13495-1992, and the marking “For fire protection use” shall be applied to these pipelines. The identification location and minimum font size shall comply with the requirements of 4.5 and 5.4 respectively. 　　 Appendix A (Standard Appendix) Examples of the application of methods for identifying basic colors and symbols A1 Reference diagram for methods of identifying basic colors as well as flow direction, pressure, temperature, etc. (Figure A1) Additional reference material beyond the standards: Pipeline marking solutions. With the growing awareness of environmental protection in China, accelerating the reform and development of the water treatment industry has become a key priority. However, during the construction or renovation of factories, accidents often occur due to poor management and a lack of safety awareness among staff. Strengthening safety management systems and installing appropriate safety warning signs will **reduce the incidence of safety accidents**. Leveraging the field experience it has accumulated over 5 years in the water quality analysis industry, Anheng Company, in compliance with the \"American ASNI\" standards as well as the standards for \"Basic Colors, Identifying Symbols, and Safety Markings for Industrial Pipelines\" (GB 7231–2003), and by utilizing advanced safety marking printers, has developed a \"Pipeline Marking Solution\" that clearly indicates the name of the medium contained within the pipeline, its flow direction, and key process parameters. Methods for attaching labels to pipes 1. National standard (mandatory) o Labels along the entire length of the pipe ； o Marking is applied to the pipes using color bands 150 mm wide; the minimum distance between two such markings should be 10 m. The locations where markings are required include the starting and ending points of all pipes, intersection points, bends, valves, both sides of wall penetrations, as well as other areas on the pipes that need to be marked. The identification symbols consist of the name of the substance, the flow direction, and key process parameters. 2. ANSI standard: o The markings must be visible from different angles, such as in every direction when passing by a valve, at both ends of a pipe passing through a wall, and from both sides of corners, etc. o When the pipe is in a straight line, it is recommended to apply markings every 25’ (7,620 mm) to 50’ (15,240 mm). Pipeline identification solutions: American ANSI standards
Pipeline medium | Identification color | Product options
Tape | Color strip
High hazard: flammable, explosive, toxic, high temperature and pressure, radioactive | Yellow background with black text | AB-YL-4607, ABR-BK-913, AB-YL-4657, ABR-BK-4635
Low hazard: liquids or mixtures | Green background with white text | AB-GN-4612, ABR-WT-915, AB-GN-4693, ABR-WT-4629
Low hazard: gases or mixtures | Blue background with white text | AB-BL-4609, ABR-WT-915, AB-BL-4662, ABR-WT-4629
Fire-fighting water or carbon dioxide | Red background with white text | AB-RD-4608, ABR-WT-915, AB-RD-4666, ABR-WT-4629

Chinese GB standards
Water | Green background with white text | AB-GN-4612, ABR-WT-915, AB-GN-4693, ABR-WT-4629
Water vapor | Red background with white text | AB-RD-4608, ABR-WT-915, AB-RD-4666, ABR-WT-4629
Air | Gray background with white text | AB-GY-4686, ABR-WT-915, AB-GY-4669, ABR-WT-4629
Gases | Yellow background with black text | AB-YL-4607, ABR-BK-913, AB-YL-4657, ABR-BK-4635
Acids or bases | Purple background with white text | AB-PL-4610, ABR-WT-915, AB-PL-4672, ABR-WT-4629
Flammable liquids | Brown background with white text | AB-BR-4611, ABR-WT-915, AB-BR-4678, ABR-WT-4629
Other liquids | Black background with yellow text | AB-BK-4689, ABR-YL-4779, AB-BK-4682, ABR-YL-4780
Oxygen | Light blue background with white text | AB-BB-4690, ABR-WT-915

Safety markings
Marking type | Representation method | Product options
Tape | Color strip
Hazard markings: Apply a 150 mm wide yellow strip on the pipeline, with 25 mm wide black strips on each side of the yellow area; the safety color ranges must comply with GB2893 standards | AB-YL-4607, ABR-BK-913, AB-YL-4657, ABR-BK-4635
Fire-fighting markings: Fire lanes in industrial production must comply with GB13495-1992 standards, and the word “Fire Lane” should be marked on the pipelines | AB-RD-4608, ABR-WT-915, AB-RD-4666, ABR-WT-4629

There are uniform regulations regarding the painting colors of pipes in factories: fire suppression water and safety vent pipes are painted red, circulating water pipes are green, nitrogen pipes are yellow, instrument air pipes are sky blue, and steam pipes are silver

Is there anything regarding pipe colors and paint grades?