Offshore platform structural support

In the construction of offshore platforms, SSAW Steel Pipes are key structural support materials. They have high strength and good welding performance, which can meet the needs of platforms to withstand huge loads in complex marine environments. For example, SSAW steel pipes are often used in the pile legs, support frames and other components of the jacket platform. Through precise welding processes, multiple sections of steel pipes are connected into a stable structure to provide stable support for the upper facilities of the platform. Due to the dynamic loads such as strong winds, waves and currents in the marine environment, the high strength characteristics of SSAW steel pipes ensure the safety and stability of the platform structure, effectively resist the impact of these harsh external forces, and ensure the long-term reliable operation of the platform.

Cross-sea bridge foundation engineering

SSAW steel pipes play an important role in the foundation construction of cross-sea bridges. In the construction of bridge pile foundations, large-diameter SSAW steel pipes are widely used as pile body materials. The steel pipes are driven into the seabed soil layer as the foundation of the bridge piers, bearing the huge vertical and horizontal loads from the bridge superstructure. The corrosion resistance of SSAW steel pipes can adapt to seawater erosion in the marine environment after appropriate anti-corrosion treatment. At the same time, its larger pipe diameter and wall thickness can provide sufficient rigidity and bearing capacity to ensure that the bridge foundation remains stable under complex marine geological conditions, laying a solid foundation for the safe operation of cross-sea bridges.

Submarine oil and gas pipeline laying

Submarine oil and gas pipelines are important infrastructure for marine oil and gas development, and SSAW steel pipes are one of the commonly used pipes. During the laying process, SSAW steel pipes have good pressure bearing capacity due to their continuous spiral welds, which can meet the requirements of long-distance, high-pressure oil and gas transportation. The steel pipes are welded and laid on the seabed in sections by special pipe-laying ships to form a through oil and gas transmission channel. In the marine environment, after strict anti-corrosion treatment of SSAW steel pipes, such as the use of thermal spraying zinc-aluminum coating combined with organic closed coating, seawater corrosion can be effectively prevented, ensuring that the pipeline can safely transport oil and gas during decades of service, providing reliable guarantees for the efficient development and utilization of marine oil and gas resources.

Construction of marine aquaculture facilities

With the development of marine aquaculture, SSAW steel pipes are used to construct various aquaculture facilities. For example, the frame structure of large-scale marine aquaculture cages, SSAW steel pipes have good processing performance and can be processed into various shapes and sizes according to design requirements to meet the needs of different aquaculture scales and environments. Its high strength can resist the impact of seawater and the weight of the aquaculture facilities themselves, ensuring the stability of the cages under the action of ocean currents, wind and waves. Moreover, after anti-corrosion treatment, it can be used in seawater for a long time, reducing maintenance costs, and providing strong support for the scale and sustainable development of marine aquaculture.

Seawater desalination water intake pipeline

In seawater desalination projects, SSAW steel pipes are often used to build water intake pipelines. Pipelines for extracting seawater from the ocean need to have good corrosion resistance and mechanical properties. After anti-corrosion treatment, SSAW steel pipes can effectively resist the erosion of various corrosive components in seawater. Its larger pipe diameter can meet the flow requirements of large-scale water intake, ensuring a stable supply of sufficient raw water to the seawater desalination plant, and playing an indispensable role in the development of the seawater desalination industry.

Projects

Deep-sea oil and gas pipeline laying case

Zhujiang Steel Pipe assists 3,500-meter ultra-deep submarine pipeline project: In 2019, facing the 3,500-meter ultra-deep-sea order demand from overseas customers, Zhujiang Steel Pipe Company, located in Panyu, Guangzhou, formed a tough team. In response to the special needs of ultra-deepwater high-pressure submarine pipeline projects, the company successfully trial-produced the world's first 3,500-meter ultra-deep submarine oil and gas transmission pipeline steel pipe sample by studying steel pipe forming technology, welding technology and testing technology. The company's original "deep-sea steel pipe JCOE submerged arc welding process" guarantees the physical and chemical performance indicators of the steel pipe parent material and welds. The team also uses advanced non-destructive testing technology to ensure that every steel pipe is zero-defective. At present, this innovative achievement has been industrialized and promoted in my country's "Enping" and "Yacheng" gas fields, as well as submarine oil and gas pipeline projects in Nigeria and other countries, providing nearly 110,000 tons of high-quality pipes for the world's deep-water oil and gas pipeline projects, and achieving sales revenue of 382 million yuan.

Cangzhou Longtaidi Pipeline Technology Service "Deep Sea No. 1" Phase II Project: The offshore installation of the "Deep Sea No. 1" Phase II comprehensive processing platform has been completed, and its submarine long-distance pipeline comes from Cangzhou Longtaidi Pipeline Technology Co., Ltd. The water depth in the development area of ​​the "Deep Sea No. 1" Phase II project is nearly 1,000 meters, and the transmission pipeline needs to withstand huge pressure and strong corrosion. Cangzhou Longtaidi's bimetallic composite pipe products with high pressure resistance and corrosion resistance, which are the first in the domestic industry, stand out and provide composite pipeline bend anchors, pipe fittings, flanges, etc. for this project. The company has established a research and development interconnection organization through cooperation with many universities, and has obtained 29 patents. Its products are in a leading position in the country and are sold in 53 countries and regions around the world.

Offshore platform construction case

Haiqianwei Steel Pipe won the bid for the Kaminho deepwater FPSO project in Angola: On February 3, 2025, Hebei Haiqianwei Steel Pipe Co., Ltd. successfully won the bid for the steel pipe supply contract for the Kaminho deepwater FPSO project in Angola. The project is jointly invested and developed by international energy giant TotalEnergies, ENI, Sonangol and other companies. It is located in Block 17/06 in Angola, with a water depth of 1,700 meters. With its core technology of "deep-sea corrosion-resistant high-strength steel pipe", Haiqianwei Steel Pipe completed technical adaptation, joint bidding and qualification review in 18 months. The submarine pipeline pipes resistant to hydrogen sulfide corrosion provided by it have passed the dual certification of API (American Petroleum Institute) and the owner's technical review.

Cross-sea bridge construction case

Zhoudai Bridge uses large-diameter ultra-long steel pipe pile foundation: Zhoudai Bridge has a total construction mileage of 83 kilometers, spans 8 islands, and has 10 bridges. It is China's longest island-linking highway and the largest cross-sea bridge group. It is located in the high wind speed belt along the coast of Zhejiang, with frequent typhoons and monsoons and complex seabed geological conditions. The builders used large-diameter ultra-long steel pipe pile foundations, which is the largest cross-sea bridge project to date using this technology. SSAW steel pipes are used as pile materials. After anti-corrosion treatment, they meet the long-term stable load-bearing requirements of the bridge in a complex marine environment, providing key support for the successful construction of the bridge.

Application cases of marine aquaculture facilities

"Haiwei No. 2" offshore intelligent aquaculture platform: Guangdong's largest offshore intelligent aquaculture platform "Haiwei No. 2" was successfully launched on June 20, 2023. Its effective aquaculture water volume reaches more than 30,000 cubic meters, with a total investment of 30 million yuan. The platform frame structure uses SSAW steel pipes, which have good processing properties and are processed into suitable shapes and sizes to meet the design requirements of the aquaculture platform. Its high strength resists the impact of seawater and the weight of the platform itself, ensuring the stability of the platform under the action of currents, wind and waves. After anti-corrosion treatment, it can be used in seawater for a long time, reducing maintenance costs, and providing reliable guarantees for large-scale, intelligent marine fish farming (such as cobia, sergeant, saddle grouper (dragon grouper) and other mid-to-high-end precious marine fish).