Seamless carbon steel pipes for low temperature service

• ​Introduction

Seamless carbon steel pipes for low-temperature service are specialized pipelines designed to operate in cold environments (typically below -20°C). They are widely used in industries such as oil and gas, petrochemicals, and LNG transportation, ensuring safe fluid transport under cryogenic conditions

• ​Main Functions

Transport fluids and gases: They are mainly used to transport various fluids and gases, such as oil, natural gas, and liquefied gases, in low – temperature environments.

Withstand pressure: They have the ability to withstand high pressure, ensuring the safe operation of the pipeline system under low – temperature and high – pressure conditions.

Resist low – temperature embrittlement: These pipes can maintain good toughness and strength at low temperatures, effectively preventing the occurrence of embrittlement phenomena, thereby ensuring the integrity and reliability of the pipeline system.

• ​Tubing Standards

ASTM A333；EN 10216-4；GB/T 18984

• ​Material & Performance

Gr.1，Gr.6，Gr.10；P235NL，P265NL，P355NL；09DG，16MnDG，10MnDG；

Low – temperature toughness: It has excellent low – temperature toughness and can maintain good ductility and impact resistance at low temperatures, effectively preventing brittle fracture.

High strength: It has sufficient tensile strength and yield strength to withstand the pressure and external forces in the pipeline system.

Corrosion resistance: It has a certain degree of corrosion resistance and can adapt to various chemical media and gas environments.

• ​Manufacturing Process ​

Hot Rolling ​； Cold drawn/Rolling ​

Heat treatment: According to the performance requirements of the steel pipe, conduct heat treatment on the rolled steel pipe, such as normalizing, tempering, quenching, etc., to eliminate the residual stress inside the steel pipe and improve its strength, toughness, hardness, and other properties.

Inspection: Conduct a comprehensive inspection on the finished steel pipe, including the inspection of dimensional accuracy, appearance quality, mechanical properties, chemical composition, etc., to ensure that the steel pipe meets the relevant standards and customer requirements.

• Specifications