3PE anti-corrosion steel sleeve steel insulation steel pipe 
Detailed information 
3PE anti-corrosion steel sleeve steel insulation steel pipe insulation structure can be divided into two categories according to different sliding modes: 
1. Internal sliding type: The insulation structure consists of a working steel pipe, aluminum silicate, drag reduction layer, microporous calcium silicate, insulation layer, stainless steel fastening steel strip, aluminum foil reflective layer, polyurethane insulation layer, outer steel pipe, and external anti-corrosion layer. The inner sliding thermal insulation steel pipe is composed of steel pipe conveying medium+composite silicate or microporous calcium silicate+rigid polyurethane foam+outer steel pipe+anti-corrosion protective layer of glass fiber reinforced plastic shell. The insulation treatment technology for various pipe fittings nodes is mature and reliable in quality. 
2. External sliding type: The insulation structure consists of a working steel pipe, a glass wool insulation layer, an aluminum foil reflective layer, a stainless steel fastening steel strip, a sliding guide bracket, an air insulation layer, an external protective steel pipe, and an external anti-corrosion layer. 
External sliding insulation steel pipe structure form 
1. Inner steel pipe 
2. Zinc rich primer 
3. Sliding guide bracket 
4. High temperature resistant glass wool 
5. Aluminum foil reflective layer 
6. Air insulation layer 
7. Coat steel pipe 
8. Coat steel pipe anti-corrosion layer 
3PE anti-corrosion steel sleeve steel insulated steel pipe is a type of underground buried pipeline that can be directly buried without concrete structure. The thermal expansion of the working steel pipe is carried out inside the outer pipe, thereby reducing material costs, shortening construction dates, and ensuring the safety of heating pipelines. It can be widely used safely in different temperature environments, especially for high-temperature steam pipeline projects. The operating temperature can reach 150 ℃ -450 ℃. Pipeline ports are generally sealed with polyethylene film or three-layer PE cold wrapping tape to prevent moisture or water from entering before installation or during construction. The insulation material is wrapped with multiple layers of staggered seams, effectively reducing heat loss. At the same time, control measures are taken on the surface of the jacket to prevent the formation of cold bridges, thereby ensuring the temperature control of the anti-corrosion layer of the jacket. Wrapping multiple layers of aluminum foil reflective layer with insulation material effectively reduces heat loss and makes the steam pipeline more economical and reasonable. The drainage system adopts a fully enclosed form, with flexible layout, reasonable structure, and safety and reliability. The moisture discharge pipe on the steel casing can not only timely discharge humid gases, but also serve as an alarm signal pipe for daily operation. The thermal compensation of the pipeline adopts high-quality corrugated pipe compensators, which are installed inside the casing and made in a direct burial form, without the need for observation wells. The construction operation is convenient and the construction period is short. Suitable for transporting steam or other media below 2.5MPa and 350 degrees Celsius, this product uses steel pipes as the outer protective layer, which has the advantages of high strength, low damage, easy construction and maintenance, and long service life.