LSAW Steel Pipes have the following application cases in special environments:

High-altitude regions

Huadian Mulei Carbon Dioxide Energy Storage Power Station: Huadian Mulei's 1 million kilowatt carbon dioxide compressed air energy storage comprehensive energy demonstration project is the world's largest carbon dioxide energy storage power station, located in low-temperature areas such as deserts, Gobi, and deserts. The gemstone pipe industry ensures the production and supply of ultra large caliber low-temperature service gas transmission steel pipes, which need to withstand extreme low temperature and high pressure conditions. The steel pipe is made of special materials and manufacturing processes. Technical personnel have conducted repeated experiments to demonstrate the low-temperature brittle fracture impact performance of the material. By optimizing welding materials and parameter ratios, measures are taken to ensure that the welding quality and physical and chemical properties match the low-temperature storage requirements of the medium.

marine environment

East Africa Crude Oil Pipeline Project: The East Africa Crude Oil Pipeline Project is the world's longest heated crude oil pipeline project, and Panyu the Pearl River Steel Pipe (Zhuhai) Co., Ltd. provides it with more than 20000 tons of oil pipelines. The Pearl River Steel Pipe has formed a set of steel pipe manufacturing technology for 1500 3500 meters ultra deep sea pipeline, which is the first in the world. Through the highest level impact test in the domestic industry, it has been verified that steel pipes can maintain high strength and high toughness in 3500 meters ultra deep sea, and can be used in deep sea pipeline engineering.

Liwan Deep Sea Gas Field: High performance steel pipes produced by Panyu the Pearl River Steel Pipe (Zhuhai) Co., Ltd. were used in the development of Liwan Deep Sea Gas Field. In the high-pressure and highly corrosive environment of the deep sea, these steel pipes need to have excellent corrosion resistance, high strength, and high toughness to ensure the safe development and long-term stable operation of gas fields.

High temperature and high pressure acidic oil and gas fields

Main oil and gas fields in Tarim, Changqing, Sichuan and other blocks in China suffer from severe CO ₂ corrosion and even more severe and complex CO ₂+H ₂ S+Cl ⁻ comprehensive corrosion. The mining depth is large, and the underground temperature reaches over 200 ℃. There is a high risk of stress corrosion cracking of materials in high-temperature and high-pressure acidic environments. Daye Special Steel Co., Ltd. has developed a series of medium thick walled seamless steel pipes that are resistant to H ₂ S corrosion and CO ₂ corrosion, including steel grade corrosion-resistant materials such as 80SS, 95SS, and 110SS, as well as a series of stainless steel pipe products such as 13Cr and Super 13Cr used in high-temperature, high-pressure, high acid complex underground environments.

Complex and extremely harsh environment oil and gas wells: Hengyang Hualing Steel Pipe Co., Ltd. and other units have developed high-end oil well tubing and key technologies such as high-strength and high toughness casing for ultra deep wells, oil casing for heavy oil thermal recovery wells, and anti H ₂ S/CO ₂ corrosion oil casing for complex and extremely harsh environment oil and gas wells. The product has broken multiple extreme application records at home and abroad, including the deepest well, longest horizontal well, and deepest horizontal well on land. The steel grade of the anti H ₂ S corrosion oil casing reaches 125ksi, and the uniform corrosion rate of the anti CO ₂ corrosion oil casing is as low as 0.0079mm/a.

In addition to the fields mentioned earlier, there are other special environments that require the use of LSAW steel pipes

1. Low temperature and high pressure environment in the aerospace field

Rocket fuel delivery system: In space launch activities, the delivery pipeline of rocket fuel (such as liquid hydrogen and liquid oxygen) needs to operate at extremely low temperatures (liquid hydrogen temperature can reach 253 ℃) and a certain pressure. If LSAW steel pipes can be applied in this field, they need to have excellent low-temperature toughness and leak resistance. In order to prevent steel pipes from brittle fracture at low temperatures, their material composition needs to be specially designed, such as adding alloy elements such as nickel to improve low-temperature toughness. The welding process is also more stringent, ensuring the sealing and strength of the weld at low temperatures to avoid risks such as fuel leakage causing explosions.

Environmental control system of spacecraft: In the space environment simulation room or the environmental control system inside the spacecraft, some pipelines are used to transport cooling media or gas regulating components. These pipelines sometimes face rapid temperature changes and certain pressure differentials. LSAW steel pipes can be used in this special environment after special treatment due to their excellent pressure resistance and processability. For example, in testing equipment that simulates space vacuum environments on the ground, pipelines have to withstand cyclic changes from room temperature to extremely low temperature, as well as internal and external pressure differences. The high-quality welded structure of LSAW steel pipes can reduce the risk of weld cracking caused by thermal expansion, contraction, and pressure changes.

2. Low temperature and strong wind environment in high mountain and plateau areas

Snowmaking and water supply system in alpine ski resorts: In alpine ski resorts, the altitude is high, the temperature is often below zero degrees, and strong winds are frequent. When LSAW steel pipes are used for the water supply and drainage pipelines of snowmaking systems, they need to withstand the vibrations caused by low-temperature freezing and strong winds. In order to adapt to this environment, the wall thickness of the steel pipe may need to be appropriately increased, and insulation materials should be wrapped around the outside of the pipeline. The welding joints should also undergo special anti-corrosion and frost resistance treatment. For example, in some ski resorts in the Alps, LSAW steel pipes are used for water supply pipelines. By applying special anti freezing sealant and wrapping insulation cotton at the welds, the pipelines are effectively prevented from freezing and leaking in cold winter.

Pressure pipelines for hydropower projects in high-altitude areas: In hydropower projects in high-altitude areas such as the Qinghai Tibet Plateau, pressure pipelines need to withstand enormous water pressure and face environments with low temperatures and large temperature differences between day and night. LSAW steel pipes need to have good fatigue resistance and low-temperature adaptability when applied in this environment. For example, in the planning of some hydropower projects on the the Yarlung Zangbo River, taking into account the local low temperature environment and high water pressure, higher requirements are put forward for the toughness and strength indicators of LSAW steel pipes. At the same time, non-destructive testing is required for welds to ensure that cracks will not occur due to temperature changes and water pressure during long-term operation, which will lead to water leakage.

3. Underground deep high-temperature geothermal energy extraction environment

Geothermal well casing and transmission pipelines: In geothermal energy extraction thousands of meters underground, temperatures can reach up to 200 to 300 ℃, and corrosive geothermal fluids are present. LSAW steel pipes need to have high temperature corrosion resistance and pressure resistance when used for geothermal well casing and pipelines transporting high-temperature geothermal fluids. The alloy composition of its pipes may include elements such as chromium and molybdenum to enhance their resistance to high temperature corrosion. In terms of welding process, it is necessary to ensure the stability of the weld at high temperatures and prevent chemical components in geothermal fluids (such as hydrogen sulfide, carbon dioxide, etc.) from corroding the weld. For example, in some geothermal energy extraction projects in Iceland, LSAW steel pipes have been successfully applied to high-temperature geothermal wells and pipelines through special surface treatment and optimized welding processes, providing reliable infrastructure for local geothermal energy development.