Details of X70Q seamless steel pipe

X70Q seamless steel pipes are high-performance pipeline products widely used in petroleum, natural gas, chemical, and construction industries. Manufactured in compliance with API 5L (PSL2) standards for pipeline transportation of gas, oil, and water, and conforming to TSG D7002 pressure pipeline component type test rules, these pipes are engineered for reliability in demanding environments. This article will briefly introduce details of X70Q seamless steel pipe.

Specifications of X70Q Seamless Steel Pipe

Standard Compliance: API 5L (PSL2), TSG D7002

Outer Diameter: 21.3 mm – 1219 mm

Wall Thickness: 2 mm – 80 mm

Manufacturing Methods: Hot rolling, cold rolling, cold drawing, hot expansion

Delivery Condition: As-rolled or after heat treatment

Chemical Composition (% max) of X70Q Seamless Steel Pipe

Carbon (C): ≤ 0.18

Silicon (Si): ≤ 0.45

Manganese (Mn): ≤ 1.80

Phosphorus (P): ≤ 0.025

Sulfur (S): ≤ 0.015

Mechanical Properties of X70Q Seamless Steel Pipe

Yield Strength: 485 – 635 MPa

Tensile Strength: 570 – 760 MPa

Manufacturing Process of X70Q Seamless Steel Pipe

The production of X70Q seamless steel pipe includes several critical stages:

Raw Material Selection: High-quality carbon steel or alloy steel is chosen based on strict criteria.

Steelmaking: The chemical composition and temperature are precisely controlled during smelting to ensure internal quality.

Hot Deformation: Through high-temperature rolling, the material is shaped into a seamless tube.

Heat Treatment: Enhances the mechanical properties and corrosion resistance of the finished pipe.

Key Features of X70Q Seamless Steel Pipe

High Strength: Excellent yield and tensile strength make it suitable for high-pressure applications.

Superior Corrosion Resistance: Engineered to resist various corrosive environments.

Excellent Weldability: Easily welded to meet complex construction and pipeline requirements.

Reliable Low-Temperature Performance: Maintains toughness and mechanical integrity under sub-zero conditions.

Application Fields of X70Q Seamless Steel Pipe

Due to its outstanding performance, X70Q seamless steel pipe is widely used in the following sectors:

Oil and Gas Transmission: Ideal for long-distance pipelines due to high strength and corrosion resistance.

Chemical and Pharmaceutical Industries: Suitable for transporting corrosive substances in industrial processing.

Energy and Power Sector: Used in boilers, heat exchangers, and pressure systems to enhance efficiency and durability.

Construction and Bridge Engineering: Utilized in support structures and bridge foundations thanks to its strength and weldability.

Other Industries: Found in shipbuilding, automotive manufacturing, and mechanical engineering.

Future Outlook

As industrial demands evolve and technology advances, the need for high-performance pipeline materials continues to grow. X70Q seamless steel pipe, with its superior mechanical and chemical characteristics, is poised to see increased application across even more fields. Future innovations in materials science and production technology are expected to further enhance its performance and broaden its market scope.

Conclusion
X70Q seamless steel pipe stands as a benchmark in the pipeline materials industry. Its advanced manufacturing process, exceptional mechanical properties, and wide application range position it as a key material for the future of infrastructure and energy development. With ongoing advancements, X70Q pipes will continue to contribute significantly to industrial progress and global connectivity.