What is the core role of spiral pipes in oil and gas transportation?
Spiral pipes are widely used in long-distance oil and gas transportation due to their high strength and pressure resistance. Their spiral weld structure can effectively withstand internal pressure fluctuations, and their large diameter design (up to 3 meters) improves transportation efficiency. In addition, spiral pipes can adapt to harsh environments, such as pipelines on the seabed or in high-cold areas, through anti-corrosion coatings.
Why are spiral pipes suitable for water conservancy projects?
Water conservancy projects require large-diameter pipelines to transport water, and the customized production of spiral pipes can meet the needs of different pipe diameters. Its weld strength is high and can resist water pressure shock, and the inner wall can be lined with cement or epoxy resin for corrosion protection. Compared with straight seam pipes, spiral pipes are easier to bend and lay in civil construction, reducing the risk of leakage at the connection point.
What are the application cases of spiral pipes in building structures?
Spiral pipes are often used in support columns of large-span buildings such as gymnasiums and airports because of their excellent bending resistance. For example, the steel structure of Beijing Daxing Airport uses spiral pipes as load-bearing components. In addition, spiral pipes can also be processed into pile foundations for soft soil foundation reinforcement. Their hollow structure reduces weight and facilitates grouting.
What are the special requirements for spiral pipes in the chemical industry?
Chemical pipelines need to be corrosion-resistant and high-temperature resistant. Spiral pipes are often made of stainless steel or duplex steel. The inner wall needs to be polished or lined with plastic to reduce medium adhesion, and the welds need to be 100% inspected to ensure no leakage. In addition, the erosion of the pipe wall by the medium flow rate needs to be considered during design, and the wall thickness should be increased if necessary.
What are the advantages and limitations of spiral pipes in municipal drainage systems?
The advantages include low cost, quick installation, and the ability to cope with storm drainage needs by increasing the pipe diameter. However, spiral pipes need to be well protected when buried, otherwise they are susceptible to electrochemical corrosion in the soil. The limitation is that small-diameter (<500mm) spiral pipes are not as economical as PE pipes and are suitable for medium and large drainage projects.
