Detailed Introduction to insulated steel pipes

December 11, 2023

Insulated steel pipes are widely used in our daily lives, and their presence can often be found in liquid and gas transportation pipelines, petrochemicals, and centralized municipal engineering. So, what is insulated steel pipe? What advantages does it have? Steel pipes processed using modern insulation technology, after a series of treatments, can ensure that their internal and external temperatures meet the requirements during operation in complex environmental conditions and different external media, which is called insulation steel pipes. Its insulation performance is good, and its heat loss is only 25% of that of other steel pipes. Using this type of steel pipe can effectively reduce energy consumption in China. In addition, it has strong anti-corrosion ability, long service life, and can be operated without complex technology and equipment, making it convenient and fast with low cost.

Firstly, let me introduce the classification of insulated steel pipes. According to their characteristics and different usage scenarios, they are usually divided into two categories: steel sleeve steel composite insulated steel pipes and polyurethane insulated steel pipes.

1. Steel sleeve steel composite insulation steel pipe

This type of steel pipe can be buried deep underground and its surface is not prone to corrosion, making it suitable for use without concrete. The advantage of this type of insulated steel pipe is that we can reduce material costs and shorten time to improve construction efficiency.

In addition, steel sleeve steel composite insulation steel pipes can be further divided into two categories according to the sliding form of the insulation structure, namely inner sliding and outer sliding steel sleeve steel insulation steel pipes

2. Polyurethane insulated steel pipe

Next, we will introduce polyurethane insulated steel pipes, which have the following advantages: they can reduce engineering costs when used; Polyurethane insulated steel pipes have low heat loss, ensuring energy conservation; The third advantage is better anti-corrosion performance, better insulation, and long service life.

So what is the unique structure that enables insulated steel pipes to meet the temperature requirements inside and outside the pipe during operation? Let's understand its structural mechanism together.

1. External protective steel pipe: This type of steel pipe is deeply buried underground and is susceptible to groundwater erosion. This structure can provide support for the working pipe to ensure its safe and effective operation.

2. Anti corrosion coating: protects the outer steel pipe from corrosive substances and extends the service life of the steel pipe.

3. Drag reduction layer: Ensure that the working tube can move freely with seasonal changes in thermal expansion and contraction.

4. Polyurethane foam layer: keep the surface of the outer protective tube at normal temperature, and ensure that the medium temperature in the working tube is constant.

5. Barrier and reflective layer: ensure that the components of the steel pipe, such as organic foam and other materials will not affect the normal operation of the working pipe.

6. Working steel pipe: It is an important component of insulation steel pipe, ensuring the normal flow of the conveying medium.

The anti-corrosion of insulation pipes usually only requires 2PE Heat Shrink Tape from Heat Shrinkable Sleeves, without the need to apply Liquid Epoxy Coatings, eliminating the need for Epoxy Primer. The Outerwrap Tape also can be directly used for the pipeline.

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