LSAW Steel Pipes have a wide range of applications in offshore oil and gas extraction platforms. LSAW steel pipe is a pipe made from a single medium thick plate, using double-sided submerged arc welding and expanding the diameter. Its finished product specification range is wide, and the toughness, plasticity, uniformity, and density of the weld seam are good. It has the advantages of large pipe diameter, thick pipe wall, high pressure resistance, low temperature resistance, and strong corrosion resistance.

In offshore oil and gas extraction platforms, LSAW steel pipes are mainly used for transporting oil and gas. For example, the products of Hefei Zijin Steel Pipe Co., Ltd. are widely used in offshore wind power, marine engineering, oil and gas transmission engineering and other fields, specializing in the production of LSAW steel pipes. Its LSAW steel pipe, with its excellent performance, can stably transport oil and gas resources in complex marine environments.

In addition, LSAW steel pipes also play an important role in the construction of offshore platforms. Jiangyin Sanhe Heavy Industry Steel Products Co., Ltd. specializes in the research, development, production, and sales of large-diameter thick walled submerged arc welded (LSAW) steel pipes, which are widely used in offshore oil drilling platforms and other fields. Its steel pipes can be used to construct structures for offshore platforms, withstanding various pressures and impacts brought by the marine environment.

Qinhuangdao Wanji Steel Pipe Co., Ltd. specializes in the production of large-diameter straight seam submerged arc welded (LSAW) steel pipes, which are suitable for natural gas applications, including subsea, onshore long-distance pipelines, and structural steel pipes for offshore platforms. This further illustrates the importance of LSAW steel pipes in offshore oil and gas extraction platforms. In summary, LSAW steel pipes play a crucial role in oil and gas transportation and platform construction for offshore oil and gas extraction platforms due to their excellent performance.

Advantages of LSAW steel pipe for offshore oil and gas transportation

LSAW steel pipes have significant advantages in offshore oil and gas transportation. Firstly, it has the characteristic of a large pipe diameter, which can meet the needs of large-scale oil and gas transportation. In offshore oil and gas extraction, the production is usually large, requiring large-diameter pipelines to ensure efficient transportation. Secondly, the characteristic of pipe wall thickness enables it to withstand high pressure. Offshore oil and gas transportation often faces complex marine environments and long-distance transportation pressures. The thick walled structure of LSAW steel pipes can effectively resist these pressures and ensure the safety and stability of transportation.

High pressure resistance, low temperature resistance, and strong corrosion resistance are also important advantages of it. The marine environment is harsh, with large temperature changes and corrosive seawater. LSAW steel pipes, with their excellent low temperature resistance and corrosion resistance, can operate stably in such environments for a long time. The toughness, plasticity, uniformity, and density of the weld seam are good, reducing the risk of cracking and other problems in the pipeline during use. When constructing high-strength, high-quality long-distance oil and gas pipelines, LSAW steel pipes are mostly large-diameter thick walled straight seam submerged arc welded pipes, which can adapt to complex transportation conditions at sea. For example, in some large-scale offshore oil and gas projects, the use of LSAW steel pipes ensures safe and efficient transportation of oil and gas from the production platform to the land.

The role of LSAW steel pipes in offshore platform construction

LSAW steel pipes play a crucial role in offshore platform construction. On the one hand, it can serve as a structural support for the platform. Offshore platforms need to withstand the impact of natural forces such as waves and sea winds, as well as the weight of equipment and personnel on the platform. LSAW steel pipes, with their high strength and good mechanical properties, can provide stable and reliable structural support for the platform. For example, in some large offshore oil and gas extraction platforms, LSAW steel pipes are used to construct the main framework of the platform, ensuring stability in harsh marine environments.

On the other hand, LSAW steel pipes can be used for transporting media such as oil and gas. From offshore oil and gas extraction platforms to land, reliable transportation pipelines are required. The large diameter, thick wall, and high pressure resistance of LSAW steel pipes make them an ideal choice. It can ensure the safety and stability of oil and gas during transportation, reducing the risk of leakage. Meanwhile, LSAW steel pipes can also be used to transport other media such as water and coal slurry, meeting various needs of offshore platforms.

Characteristics of LSAW steel pipe products from different companies

Hefei Zijin Steel Pipe Co., Ltd. is a professional manufacturer of LSAW steel pipes, which are widely used in offshore wind power, marine engineering, oil and gas transmission engineering and other fields. The company's LSAW steel pipes have the characteristics of high annual comprehensive production capacity and multiple production bases. In terms of product quality, strict production processes are carried out, including plate probing, milling, pre bending, forming, pre welding, internal welding, external welding, ultrasonic testing, X-ray testing, diameter expansion, hydrostatic testing, chamfering and other multiple procedures, to ensure the quality and performance of steel pipes.

The LSAW steel pipe produced by Cangzhou Mingtian Pipeline Co., Ltd. is made of single medium thick plate as raw material, using double-sided submerged arc welding and expanding the diameter. Its finished product specification range is wide, and the toughness, plasticity, uniformity, and density of the weld seam are good. It has the advantages of large pipe diameter, thick pipe wall, high pressure resistance, low temperature resistance, and strong corrosion resistance. It plays an important role in the construction of high-strength, high-quality long-distance oil and gas pipelines.

Production process and performance of LSAW steel pipe

The production process of LSAW steel pipes is relatively complex. Firstly, the plate probe is used to conduct full plate ultrasonic inspection on the raw materials used in the production of steel pipes, with strict control. Next is edge milling, which uses a fully automatic edge milling machine to perform double-sided milling on the two longitudinal edges of the steel plate to achieve the required plate width for processing. The pre bending edge is prepared for subsequent forming by using a pre bending machine to pre bend the board edge.

During the forming process, JCO forming method is a progressive multi-step compression molding process, where the steel plate is perfectly circular through a CNC system, with uniform deformation in all parts, low residual stress, and uniform distribution. Pre welding adopts high-power continuous active gas shielded arc welding (MAG), laying the foundation for internal and external multi wire submerged arc welding. Internal welding is carried out on the inner side of the steel pipe using longitudinal multi wire submerged arc welding, which has high production efficiency, low porosity and slag inclusion rate, and good mechanical properties of the joint. The external welding is also carried out using longitudinal multi wire submerged arc welding on the outer side of the straight seam submerged arc welded steel pipe.

Afterwards, ultrasonic testing and X-ray testing will be conducted to inspect the welds and base materials. Expanding the diameter can improve the geometric dimension accuracy of steel pipes and improve the distribution of internal stress. The hydrostatic test inspects each expanded steel pipe one by one to ensure quality. Chamfering the steel pipe ends to ensure the quality of butt welding.

LSAW steel pipes have excellent performance. The product has a wide range of specifications, high weld quality, high pressure resistance, low temperature resistance, and strong corrosion resistance, and plays an important role in offshore oil and gas transportation and platform construction.

The importance of LSAW steel pipes on offshore platforms

LSAW steel pipes have irreplaceable importance on offshore platforms. In offshore oil and gas extraction platforms, it is not only a key component of structural support, but also an important channel for oil and gas transportation. Its excellent performance can adapt to harsh environmental conditions at sea, ensuring the safe and stable operation of the platform and efficient transportation of oil and gas. Whether in the construction stage of the platform or in the subsequent production and operation stage, LSAW steel pipes play a crucial role. It provides reliable support for the development and utilization of offshore oil and gas resources, and promotes the development of the marine economy.

In summary, LSAW steel pipes have various applications in offshore oil and gas extraction platforms, playing an important role in structural support and oil and gas transportation. The products of different companies have their own characteristics, with complex production processes and excellent performance, which are crucial for the construction and operation of offshore platforms.

LSAW steel pipe, also known as straight seam submerged arc welded steel pipe, has the following applications on offshore oil and gas extraction platforms:

Oil and gas transmission pipelines

Long distance subsea oil and gas transportation: The oil or natural gas extracted from offshore oil and gas fields is transported to onshore processing plants or storage facilities through subsea pipelines made of LSAW steel pipes. For example, in the development of shallow water oil and gas fields closer to land, large-diameter and thick walled LSAW steel pipes are used to lay submarine pipelines, which can withstand seawater pressure and formation stress, ensuring stable transportation of oil and gas

Oil and gas transmission between platforms: LSAW steel pipes are often used to connect multiple offshore oil and gas extraction platforms, achieving mutual allocation and centralized processing of oil and gas. For example, in large offshore oil and gas field clusters, different functional platforms such as drilling platforms, production platforms, storage platforms, etc. are connected through pipeline networks, among which LSAW steel pipes undertake the important task of transmitting and distributing the oil and gas produced by each platform

Platform structure support

Jacket structure: As the foundation structure of a fixed offshore platform, the jacket is usually composed of a large number of steel pipe piles, and some jackets may use LSAW steel pipes. These steel pipe piles are driven into the seabed to provide stable support for the platform, bearing the weight of the platform as well as environmental loads such as waves and wind. For example, in shallow sea areas, fixed oil and gas extraction platforms use high-strength LSAW steel pipes in their pipeline structure, which can ensure the stability and safety of the platform in harsh sea conditions

Supporting columns: For semi submersible platforms and compliant tower platforms, the supporting columns are key components to ensure the normal operation and stability of the platform. LSAW steel pipes can be used to manufacture these supporting columns. In deep-sea environments, the supporting columns of semi submersible platforms need to withstand enormous water pressure and complex ocean dynamic loads. The high strength and good corrosion resistance of LSAW steel pipes can meet their long-term use requirements

Process pipeline system

Oil and gas processing pipeline: In the oil and gas processing process of offshore platforms, such as oil and gas separation, purification, compression and other links, a large number of pipelines are required to transport oil and gas and various media. LSAW steel pipes can be used to construct these process pipeline systems. For example, in an oil and gas separation device, LSAW steel pipes of different specifications are used to transport the oil and gas mixture from the wellhead to the separator, and then the separated oil, gas, water, etc. are separately transported to the corresponding processing equipment or storage facilities.

Water and gas injection pipelines: In order to improve oil and gas recovery, offshore oil and gas fields often use secondary oil recovery technologies such as water and gas injection. LSAW steel pipes can be used as water and gas injection pipelines. Inject the processed water or gas into the oil reservoir through LSAW steel pipes to maintain reservoir pressure and increase oil and gas production. In high-pressure water injection systems, LSAW steel pipes can withstand high water injection pressures to ensure smooth water injection operations.

Torch system pipeline

Vent pipeline: During offshore oil and gas extraction, some gases that need to be vented are generated. For example, during oil and gas well testing, maintenance, and other operations, LSAW steel pipes can be used to make vent pipelines to safely discharge these gases into the atmosphere. The venting pipeline needs to have certain corrosion resistance and erosion resistance to cope with the corrosive components in the exhaust gas and the erosion of high-speed airflow. LSAW steel pipes can meet these requirements.

Torch arm pipeline: The torch arm in the torch system is an important component that separates the burning torch from the main structure of the platform by a certain distance. The fuel delivery pipeline inside it is usually made of LSAW steel pipe. The torch arm pipeline needs to operate stably in harsh marine environments for a long time, providing a stable fuel supply for the torch, ensuring timely ignition and safe combustion of the vented oil and gas in emergency situations, and preventing dangerous accidents.