Top 3 Insulation Boiler Tube Coatings

The external insulation boiler tube coating should use special coatings that are resistant to high temperature, corrosion and durability.

Selection of boiler tube coatings

The insulation coating of boiler tubes should use special coatings instead of ordinary household coatings. Boiler tubes made of seamless steel pipes, with their seamless characteristics, can better resist physical deformation under high temperature and high pressure environments. However, seamless boiler tubes are in high temperature, high pressure and corrosive environments for a long time, so it is also very important to choose special coatings suitable for the environment. High-quality coatings can extend their service life and ensure the stable operation of the boiler system.

Types of boiler tube coatings

1. Aluminum silicate coating (ASTM C795 certification)

Aluminum silicate coating is a coating with high temperature and corrosion resistance. It can resist corrosion under long-term high temperature conditions. It is widely used in various industrial environments, especially in environments with corrosive gases. For example, in some systems that use hydraulic tubes to transmit high temperature and high pressure fluids, the surrounding boiler tubes are very suitable for this coating.

Innovative process: Nano-powder spraying technology (particle size ≤ 50nm)

Technical parameters: Rhermal conductivity ≤ 0.08W/(m·K) @700℃, compressive strength ≥ 8MPa, linear shrinkage ≤ 0.3%

2. Gas phase two-component coating (ISO 12944 C5-M certification)

Gas phase two-component coating is a coating with both high corrosion resistance and high temperature stability. It can be used under high temperature conditions without falling off. At the same time, it also has very high corrosion resistance, which can effectively prevent problems such as decreased sealing due to corrosion at the pipe flange connection.

Patented technology: PECVD plasma enhanced chemical vapor deposition

Performance advantages: Film density > 99.5%, porosity < 0.01%, bonding strength ≥ 25MPa

3. Stainless steel cladding (ASME B31.1 standard)

The main function of the stainless steel cladding is to prevent the pipeline from corrosion under high temperature, high pressure and corrosive environment. It has a good protective effect on different types of boiler tubes. In some boiler piping systems made of precision tube with high precision requirements, the use of stainless steel coating can better resist harsh environments and maintain pipeline performance.

Innovative structure:

316L stainless steel substrate (δ=0.8mm)

Ceramic fiber buffer layer (δ=5mm)

Nano aerogel insulation layer (δ=10mm)

Data source: ASTM C795 high temperature test standard

Coating characteristics

1. Good high temperature resistance

Due to the high temperature of boiler tubes, it is necessary to select coating materials that can be used in high temperature environments.

2. Good corrosion resistance

Since the boiler tube is in a corrosive environment, corrosion-resistant coating materials must be selected to ensure its service life.

3. Durable

The service life of the thermal insulation coating is directly related to the service life of the pipe. Therefore, it is necessary to select a special coating with strong durability and long service life.

Summary

Choosing a suitable thermal insulation coating is one of the necessary measures to ensure the service life and stability of the boiler tube. Whether it is the characteristics of the coating or the construction cost, it needs to be comprehensively considered in the selection process. High temperature, corrosion resistance, and durability are the key points that we must consider when choosing thermal insulation coatings.

Read more: How To Weld Boiler Tubes? or Material of Boiler tube