Structural Seamless Steel Pipes

• ​Introduction

Structural seamless steel pipes are hollow steel tubes manufactured without welded seams, offering superior strength and uniformity compared to welded pipes. They are widely used in load-bearing structures, mechanical components, and high-pressure systems due to their excellent mechanical properties and reliability.

• ​Main Functions

Support and Load – Bearing：In building structures, they are used to support the weight of buildings, bridges, and other structures, ensuring the stability and safety of the entire structure.

Mechanical Components:  In mechanical manufacturing, they are often used as components of machinery and equipment, due to their high strength and good machinability.

• ​Tubing Standards

ASTM A53； EN 10210； GB/T 8162

• ​Material & Performance

Gr.A, Gr.B； S235JRH, S355J2H； 10#, 20#, 45#, Q345, 16Mn；

Structural seamless steel pipes have high strength, excellent toughness, and good pressure – resistance. They can withstand large external forces and high – pressure environments without deformation or damage. Additionally, they have good weldability and machinability, which facilitates their processing and installation in practical applications.

• ​Manufacturing Process ​

Hot Rolling ​； Cold 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.

Surface treatment: Conduct surface treatment on the steel pipe, such as rust removal, painting, or galvanizing, etc., to prevent the steel pipe from being corroded during use and improve its corrosion resistance and service life.

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