Summary of direct buried polyurethane foam pipe

As an integrated material of building insulation and waterproofing, polyurethane foam thermal insulation material breaks the common fault of traditional building materials, which are single waterproof, non thermal insulation and non waterproof insulation. Once the waterproof layer leaks, the insulation layer will lose its thermal insulation function. Compared with other single function insulation or waterproof materials, polyurethane rigid foam has significant advantages:
1. Polyurethane rigid foam has multiple functions as a single material, as well as insulation, waterproofing, sound insulation, vibration absorption and many other functions.
2. Thermal insulation performance, it is currently the lowest thermal conductivity (≤ 0.024) and highest thermal resistance among all building materials in China, with a thermal conductivity only half of EPS foam polystyrene board.
3. The polyurethane rigid foam has a continuous and dense skin and nearly 100% high-strength interconnected wall closed pores, which have ideal impermeability. The spraying method is used for construction to achieve a continuous and seamless waterproof insulation layer, forming a seamless roof and overall external wall insulation shell, with excellent waterproof and anti-seepage performance.
4. The self-adhesive performance of * (without the need for any intermediate bonding materials), firmly adheres to the roof and exterior walls, and has good wind resistance and resistance to negative wind pressure; Whole spray coating construction eliminates "hot spots" and "cold bridges"; flexible gradient technology can effectively prevent waterproof layer cracking; mechanized operation, automatic batching, uniform quality, fast construction, and short cycle.
5. Stable chemical properties, long service life, and no pollution to the surrounding environment; It extinguishes itself from an open flame and only carbonizes without dripping during combustion. The size and shape of the carbonization layer remain basically unchanged, effectively blocking the entry of air and preventing the spread of fire, with good fire safety performance.

We need to lead the polyurethane industry to develop innovative technological directions. In this process, the company adheres to the conference purpose, actively innovates, improves equipment, equips each production line with professional talents, refines production processes, and produces polyurethane insulation pipes with better performance and more environmentally friendly, which meet the needs of society, the environment, and the market.
Polyurethane insulation pipe is a type of pipeline with strong toughness, excellent insulation effect, and strong corrosion resistance. Installing polyurethane insulation pipes underground for water transportation can effectively prevent water and moisture from corroding the pipeline, as well as other harmful gases and microorganisms from entering the pipeline. In summary, the benefits of using polyurethane insulation pipes as transportation pipelines for urban water are self-evident. Not only can it reduce the cost of pipeline installation, but it also has an ultra long user base, reducing pipeline maintenance. The most important thing is that it can ensure water quality, allowing people to use water with peace of mind.
1Polyurethane direct buried insulation pipes have good insulation performance and heat loss only comparable to traditional pipe materials25%Long term operation can save a lot of energy and significantly reduce energy costs.
2It has strong waterproof and corrosion-resistant capabilities, does not require a pipe trench, can be directly buried underground or in water, is easy and fast to construct, and has a low overall cost.
3It also has good corrosion resistance and impact resistance under low temperature conditions, and can be directly buried in frozen soil underground.
4The service life can reach30-50Proper installation and use can significantly reduce the cost of pipeline maintenance.
5An alarm system can be set up to automatically detect pipeline leakage faults, accurately indicate the fault location, and automatically sound an alarm.
The lifespan can reach30-50年。 管径：DN15DN600thickness:1550mmpurpose:Centralized heating pipelines, refrigeration pipelines, industrial pipelines, etc.
7Oxygen content index: ≥27 density4070kg/cubem憎水率：0.03kg/cubecmthermal conductivity:0.022kcal/m.h.℃

Polyurethane direct buried insulation pipe with a three-layer structure from inside to outside
*Layer: The working steel pipe layer generally uses seamless pipes according to the design and customer requirements（GB8163-87）Spiral welded pipe（GB9711-88; SY/T5038-92）Straight seam welded pipe（GB3092-93）. After advanced shot blasting and rust removal process on the surface of the steel pipe, the rust removal grade of the steel pipe can reachGB8923-1988In the standardSa2Grade, surface roughness can reachGB6060.5-88in the standardR=12.5Microns.
Second layer: Polyurethane insulation layer It is made by injecting the original liquid of rigid polyurethane foam into the cavity formed between the steel pipe and the outer protective layer with a high-pressure foaming machine. Commonly known as the "pipe in pipe foaming process"'Its functions include waterproofing, insulation, and supporting the self weight of the heating network. When the temperature of the conveying medium is:-50℃120At ℃, rigid polyurethane foam is selected as the insulation layer.
Third layer: high-density polyethylene protective layer Prefabricated black (yellow) plastic pipes with a certain wall thickness are used to protect the polyurethane insulation layer from mechanical damage and to prevent corrosion and waterproofing. Polyurethane insulation pipes have always been praised by users for their excellent performance advantages and have been rapidly developed as an excellent insulation material. So, what are the reasons for the decrease in the service life of polyurethane insulation pipes? Today, I have compiled relevant information about the decrease in service life of polyurethane insulation pipes. Let's take a look together.