GB/T18984 Seamless Pipe Manufacturer

The GB/T 18984 standard specifies the technical requirements for seamless steel pipes used in low-temperature service environments. These pipes are designed to maintain strength and toughness at temperatures as low as -45°C to -196°C, making them suitable for applications in cold regions or cryogenic conditions. The standard covers various grades, such as 16MnDG, 09MnNiDG, and 10Ni14, which are selected based on specific temperature and pressure requirements. Key features include excellent low-temperature impact toughness, weldability, and resistance to brittle fracture.

GB/T 18984 seamless pipes are widely used in industries like petrochemicals, liquefied natural gas (LNG) transportation, and refrigeration systems, where reliable performance under extreme cold is critical. The standard ensures high-quality materials and manufacturing processes to meet stringent safety and operational demands.

Types of GB/T18984 Standard Seamless Steel Pipe

Low-temperature Pipe

GB/T 18984 Standard Overview

GB/T 18984 is a Chinese standard for seamless steel pipes designed for low-temperature service. It includes several material grades such as 16MnDG, 10MnDG, 09DG, 09Mn2VDG, and 06Ni3MoDG. These pipes are used in applications like cryogenic pressure vessels and heat exchangers.

Chemical Composition of GB/T 18984 pipes

The chemical composition varies by grade. For example, 16MnDG has 0.12-0.20% carbon, 0.20-0.55% silicon, and 1.20-1.60% manganese. The maximum phosphorus and sulfur content is 0.025%. Grades like 06Ni3MoDG contain nickel and molybdenum for enhanced low-temperature performance.

Mechanical Properties of GB/T 18984 pipes

The mechanical properties also differ among grades. 16MnDG has a tensile strength of 490-665 MPa and a yield strength of at least 325 MPa for wall thicknesses up to 16 mm. The elongation is at least 30%. 06Ni3MoDG has a tensile strength of at least 455 MPa, a yield strength of at least 250 MPa, and an elongation of at least 30%.

Advantages of GB/T 18984 Seamless Steel Pipes

GB/T 18984 seamless steel pipes are designed for low-temperature applications, offering excellent toughness and resistance to brittle fracture even at extremely low temperatures. These pipes have high pressure resistance and good mechanical properties, ensuring reliable performance in demanding industrial environments. They are manufactured using seamless processing techniques, resulting in a smooth internal surface and uniform dimensions, which minimizes the risk of leaks and enhances fluid flow efficiency.

Applications of GB/T 18984 Seamless Steel Pipes

GB/T 18984 seamless steel pipes are widely used in low-temperature pressure vessel piping and heat exchangers. They are suitable for conveying fluids at extremely low temperatures, such as in cryogenic applications. These pipes are also used in the oil and gas industry for transporting oil, gas, and other fluids in pipelines operating under low-temperature conditions. They are employed in petrochemical plants for the transportation of chemicals and gases, and in power plants for the construction of boilers and heat exchangers.

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GB/T18984 Standard Seamless Steel Pipe Supplier