Does it require painting, according to the standards, on the outside of insulation-covered pipes such as those used for steam at around 200 degrees Celsius?

At such high temperatures, there should be insulation material and insulating metal sheets around the pipes, right? ? I don’t think painting is necessary.

For insulated pipes, especially those used to transport steam at around 200 degrees Celsius, whether painting is necessary on their exterior depends mainly on the specific usage and protection requirements. Generally, the main purpose of painting is to prevent corrosion and rust, as well as to protect the pipe surface from external environmental influences. In some cases, it may also be done for aesthetic reasons or to identify specific pipelines. Regarding the specifications, whether painting is required depends on the local building and engineering standards. For example, in China, it may be necessary to refer to the \"Code for Acceptance of Construction Quality of Building Water Supply, Drainage and Heating Engineering\" GB50242-2002 or the latest versions of relevant standards, as well as the \"Code for Construction and Acceptance of Industrial Pipeline Engineering\" GB50235-1997, among others. These standards specify the requirements for surface protection treatment based on factors such as the material of the pipeline, the operating environment, and the type of fluid. For steam pipes at around 200 degrees Celsius, considering the corrosive nature of high-temperature steam and the need to protect the materials under such conditions, an insulating material is usually applied on the outer layer to reduce heat loss and prevent burns from contact with hot surfaces. In this case, painting is more likely to be applied to the outer protective layer or waterproofing layer of the insulation layer, rather than directly to the pipes themselves. Whether painting is necessary and what type of paint to use should be determined based on the specific design requirements and protection needs. In general, for steam pipes at around 200 degrees Celsius, the need to paint them requires a comprehensive consideration of the pipe’s operating environment, the properties of the medium, the type of insulation material, and the requirements of the final engineering design. It is recommended to consult the specific engineering design documents or seek advice from professionals to ensure compliance with all relevant standards and regulations. .

Steam pipes should be insulated for safety and to reduce heat loss

Corrosion protection requirements for high-temperature resistant anti-corrosive coatings for industrial pipelines: 1. Excellent adhesion, including adhesion tests across all possible operating temperature ranges of the equipment. It is divided into normal temperature, alternating cold and heat phases, and high-temperature operation phases. 2. It exhibits excellent mechanical properties under various temperature conditions, such as high temperatures, alternating hot and cold environments, and normal temperatures; its hardness, toughness, adhesion strength, etc., meet the required standards. 3. Corrosion resistance. Identify the corrosion factors based on the environment, such as industrial environments, buried conditions, and high-humidity river or marine environments, etc. Selection of high-temperature resistant anti-corrosion paint for industrial pipelines: 1. The inorganic zinc-rich primer is suitable as an anti-corrosion coating for the outer surfaces of pipelines at temperatures below 400°C; it can be used in combination with silicone-based high-temperature resistant topcoats. The answer above is that steam pipes at 200 degrees must be designed with anti-corrosion measures; insulation cannot serve as a substitute for these, as it does not serve the purpose of protection against corrosion. That’s how design institutes design things.

Insulation and anti-corrosion requirements provided by well-known domestic petrochemical design institutes. Pay attention to the corrosion protection of insulated pipelines, as well as any requirements for corrosion protection in cases of external insulation.

It’s not necessary. Firstly, it is a 200-degree steam pipeline; the outer wall of the pipeline is at a very high temperature, and the environment is dry, so rusting does not occur ； Second, if paint is used, high-temperature paint must be chosen, but its cost-performance ratio is not good.