Supply pipeline outsourcing insulation cotton rock wool iron sheet insulation construction aluminum skin insulation construction manufacturer
For factory piping equipment, if you want to obtain good thermal insulation effect, the outer metal protective layer plays a key role. There are serious iron sheet insulation manufacturers in Hebei that provide rock wool filling and aluminum skin riveting and welding construction. This construction can completely resolve problems such as moisture cracking of the insulation layer and peeling off of the protective layer, thereby making your pipeline system more durable.
How does iron sheet insulation technology solve the loopholes of traditional insulation?
Traditional finished insulation materials, such as glass wool tube shells, are extremely difficult to achieve a perfect fit when encountering elbows, valves or special-shaped equipment. These gaps will cause heat loss, and the thermal insulation effect will be greatly reduced after the cold bridge occurs. Iron sheet insulation manufacturers in Hebei began to promote on-site cutting and wrapping technology around 2015, using 0.5 mm thick aluminum sheet or galvanized iron sheet to cut and rivet according to the actual shape of the pipe.
The construction team will first fill the surface of the pipeline with rock wool boards or rock wool pipe shells. The thickness depends on the working conditions, ranging from 50 mm to 150 mm. Then the circumference and length of each section of pipe will be measured, and a tape measure and a square ruler will be used to mark the aluminum skin. The cut aluminum skin is fixed to the outer layer of rock wool with the help of a rivet gun, and the joints are compacted using a special bite machine. In 2023, this method was adopted in the steam pipeline renovation project of a chemical plant in Tangshan, and the life of the insulation layer at the elbow was extended by 3 years compared with the traditional method.
Material selection standards for supplying pipe outsourcing insulation cotton
Insulation wool used for pipe outsourcing is mainly divided into two categories: rock wool and glass wool. Rock wool can withstand temperatures up to 650 degrees Celsius and is suitable for use in steam pipes and high-temperature reactors. Glass wool fibers are thinner and suitable for temperatures below 250 degrees Celsius. Dacheng County, Langfang, Hebei Province is a well-known distribution center for thermal insulation materials in the country. The density of rock wool boards provided by local manufacturers is between 100 and 120 kilograms per cubic meter, and the thermal conductivity is controlled below 0.04.
When choosing thermal insulation wool, you need to pay attention to the adaptation of thickness and bulk density. For example, for pipes transmitting 120-degree hot water, energy saving needs can be achieved by using rock wool with a thickness of 50 mm and a bulk weight of 80 kg. However, if it is an outdoor pipe, you must also consider the moisture-proof layer. Regular manufacturers will wrap a layer of aluminum foil and fiberglass cloth around the rock wool to prevent water vapor from penetrating. In 2024, a central heating project in Shijiazhuang used rock wool with a moisture-proof layer, and the winter heat loss was reduced by 15% compared to the design value.
The specific process of rock wool iron sheet insulation construction
The first step in the construction of rock wool iron sheet insulation is to clean the surface of the pipe to remove rust and oil stains, and then weld or clamp the support ring on the pipe to fix the support ring. The distance is controlled between 1.5 meters and 2 meters. Then, the rock wool board is cut into a specification shape that is 5 cm wider than the circumference of the pipe, and two layers are laid in a staggered manner. Each layer is bonded with high-temperature tape, which can prevent heat from being directly transferred to the iron sheet through the gaps.
The lower point of the pipe is pushed toward the higher point to install the iron sheet. Each piece of aluminum skin is two meters long and fixed on the support ring with the help of self-tapping screws. The distance between the screws does not exceed 25 centimeters. When the two pieces of aluminum skin are overlapped, they should follow the direction of the water flow. The upper aluminum skin presses the lower aluminum skin to prevent rainwater from leaking out. In the case of backflow, the aluminum skin at the elbow must be cut into the shape of a watermelon rind, with the width of each piece not exceeding eight centimeters, and connected by rivets one by one. When the steam pipes of a food factory in Daxing District, Beijing were accepted in 2025, all rivet heads were coated with sealant, and the anti-corrosion grade reached the C4 standard.
Technical advantages of aluminum skin insulation manufacturers
Compared with galvanized iron, aluminum is 40% lighter and will not rust. Regular aluminum skin insulation manufacturers use 3003 aluminum alloy, with a thickness between 0.5 and 0.8 mm and a tensile strength of 140 MPa per square millimeter. This material will remain corrosion-resistant and perforated in outdoor environments for at least 15 years. There is an aluminum sheet processing factory in Cangzhou that upgraded its CNC shearing machine and bending machine in 2022 to be able to produce an entire aluminum sheet with a length of 6 meters and a width of 1.2 meters, thereby reducing the number of joints on site.
The riveting process is the key to aluminum skin construction. Aluminum alloy rivets must be selected to avoid electrochemical corrosion caused by contact between different metals. The rivet spacing should be controlled at 15 to 20 cm, 1.5 cm from the edge of the plate. For large pipes with a diameter of more than 1 meter, the outside of the aluminum skin It is a supply pipeline that needs to be reinforced with flat steel hoops, outsourced with thermal insulation cotton, rock wool, iron sheet insulation, and aluminum sheet insulation construction. There is an LNG storage tank pipeline project in Tianjin Binhai New Area. The construction team uses an electric rivet gun to drive 30 rivets per minute, which is five times more efficient than manual tools.
The industry status of Hebei iron sheet insulation construction manufacturers
Langfang, Cangzhou and Tangshan are the three cities where Hebei's iron sheet insulation industry is concentrated. There are more than 200 thermal insulation material factories in Liugezhuang Town, Dacheng County. Their annual output of rock wool boards reaches 800,000 tons, accounting for 35% of the national output. Local workers have been engaged in metal exterior protection construction work since 2000. Among them, skilled workers can complete the installation task of 30 square meters of aluminum skin every day. Moreover, these workers are quite familiar with the wrapping techniques of various special-shaped parts, such as tees, large and small heads, flanges, etc., which can achieve airtight effects.
Manufacturers in Hebei have formulated construction specifications for iron sheet insulation. The Hebei Provincial Engineering Construction Standard DB13(J)/T 8452-2021 requires that the joints of aluminum sheets must be connected with undercuts instead of just fixed with rivets. A company in Baoding has even developed a special bite machine with a bite width of 12 mm and a sealing performance that far exceeds that of manual knocking. In 2025, the underground pipe network insulation project of the Xiongan New District high-speed rail station will all adopt the construction plan formulated by Hebei manufacturers. After testing, the thermal bridge coefficient is 22% lower than the national standard requirements.
How to choose reliable iron sheet insulation construction services
When choosing an iron sheet insulation manufacturer, the first thing to do is to check the qualifications for riveting and welding of the outer protective aluminum skin of the ventilation duct insulation layer, and ask the other party to provide a rock wool test report. This report covers thermal conductivity, combustion performance and hydrophobicity. The aluminum skin must have a material certificate to confirm that it is 3003 or 10 60 aluminum alloy must not be mixed with scrap aluminum ventilation duct insulation layer to protect the outer protective aluminum skin from riveting . In 2024, the Hebei Market Supervision Bureau conducted a random inspection and found that there were 15% of the aluminum skin whose actual thickness was 0.1 mm thinner than the nominal value. This material will deform after two years of use.
On-site inspection of construction cases will be more reliable. Based on this, let the manufacturer give the addresses of three projects completed in the past two years, and then go there in person to check whether there are bulges on the surface of the aluminum skin, whether the rivets are loose, and whether the seams are warped. After that, ask the project leader how many square meters the workers install every day. If it exceeds 40 square meters, there may be corners cut. And also ask about the warranty period. Aluminum skin insulation projects from regular manufacturers are guaranteed for at least 5 years, and free maintenance can be performed during the warranty period.
When you are choosing among many pipe insulation manufacturers, what matters most is the construction price, the quality of the materials, or the after-sales service of riveting and welding the outer protective aluminum skin of the ventilation pipe insulation layer . You are welcome to share the standards you uphold in the comment area, like and bookmark this article to facilitate future reference for finding insulation projects.
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