Besides their mechanical properties,
16MnDG seamless steel pipes for cryogenic pipelines also possess the following characteristics:
What are the chemical composition characteristics of 16MnDG seamless steel pipes?
Carbon content: 0.12%~0.20%, Manganese content: 1.20%~1.60%, Silicon content: 0.20%~0.55%, Phosphorus and sulfur content: ≤0.025%. Through strict alloying element proportioning, strength is improved while low-temperature toughness is optimized, and impurity content is controlled to reduce the risk of brittleness.
What are the advantages of 16MnDG seamless steel pipes in terms of low-temperature toughness?
They maintain high resistance to brittle fracture in extreme low-temperature environments ranging from -45℃ to -196℃. Impact test temperatures are typically -40℃ or lower, with an impact energy ≥34J (V-notch). For example, in liquefied natural gas (LNG) storage scenarios, they can still maintain structural integrity at -162℃.
What are the corrosion resistance properties of 16MnDG seamless steel pipes?
By controlling chemical composition and surface treatment (such as anti-corrosion coating technology), dual protection is achieved, resisting the erosion of corrosive media such as hydrogen sulfide and carbon dioxide. In harsh environments such as petrochemical plants, the smooth inner wall design reduces impurity accumulation and extends pipeline service life.
What are the weldability and machinability of 16MnDG seamless steel pipes?
They support various welding processes such as manual arc welding and gas shielded welding, meeting the welding quality requirements of different projects. Hot rolling, cold drawing, and hot expansion processes, combined with normalizing treatment, ensure dimensional accuracy and improve low-temperature performance. Specifications ranging from 21mm to 762mm in outer diameter and 3.0mm to 130mm in wall thickness cover diverse needs.
Where are the application scenarios suitable for 16MnDG seamless steel pipes?
They cover extreme low-temperature fields such as cryogenic oil and gas transportation (e.g., Arctic LNG projects), pressure vessel manufacturing (ensuring the sealing of cryogenic storage tanks), LNG storage and transportation (-162℃ environment), cold storage construction (stability of refrigerant transportation), and cryogenic heat exchangers (cooling and heating of chemical production media).
What are the strict standards and specifications for 16MnDG seamless steel pipes?
They comply with the GB/T18984-2016 standard, and implement full-process control over chemical composition, mechanical properties, dimensional deviation, curvature, and surface quality.
Threeway Steel is known as a professional supplier engaged in manufacturing and distributing a wide range of steel pipe, and our headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
