The term “Hollow Section” (HSS: Hollow Structural Section) refers to a type of metal profile with a hollow tubular cross-section.
Mainly used in construction as they are able to provide high strength to weight ratio, are suitable for load bearing and they are tough and can be used in the construction of columns and beams.
This article delves into the nuances of Hollow Structural Section steel pipe including dimensions, weight factors, performance attributes, structural features, various applications, shapes, and the unique advantages that make them the cornerstone of modern architecture.
Dimensions: Precision in Tube Forms
Hollow Structural Section Steel Pipe is available in a wide range of sizes/shapes, be it square, rectangular or round. The dimensions of these tubes have been carefully crafted for precision and efficiency.
A round cross-section provides good uniformity when under pressure, making it ideal for applications such as pipes and columns. Also, round sections have the largest area for the same diameter, providing higher bending stiffness for the same material.
These are generally designed to be easier to stack and connect, but may have relatively lower flexural rigidity for the same material usage. Typically used for columns or beams. Easier to cut/link compa
To know more about the dimensions, you can read this article: Hollow Section
Despite its strong structural integrity, the Hollow Structural Section maintains a lightweight profile that reflects an optimal strength-to-weight ratio. This makes the tube easy to transport and install.
Not only that, but the hollow structure allows the tube to be produced with considerable material and cost savings, as well as increased efficiency. So for experienced engineers, Hollow Structural Section is the material of choice for economical design.
Hollow Structural Section Applications
Hollow sections find versatile applications across various industries due to their unique structural properties, adaptability, and efficiency.
In the construction industry, they are used as columns and beams. In the automotive industry, they are used for chassis and roll cages. In the machinery industry, they are used as structural frames for conveyor systems. In the oil and gas transport industry, it can be used for the transport of oil and gas, where the circular structure is more favourable for the flow of fluids. It can also be used to make racking systems.
There are many standards for Hollow Structural Sections (HSS) that define the size, shape, material requirements, and production and testing methods for HSS. The following are some common HSS standards:
ASTM A500 / A500M:
Shape: Square and rectangular cross sections
Applicable Materials: Carbon steel
Purpose: Standard specification for cold formed welded and seamless carbon steel square, rectangular and round cross-section tubes for structural use.
ASTM A1085 / A1085M:
Applicable Shapes: Square, rectangular and round cross sections
Applicable Materials: Carbon steel
Application: Standard specification for high-strength, low-alloy materials for cold-formed welded carbon steel tubes of square, rectangular, and round cross sections for structural purposes.
ASTM A847 / A847M：
Applicable Shapes: Square and Rectangular Sections
Applicable Materials: High-strength low-alloy and weathering-resistant steels
Application: Standard specification for cold-formed welded and seamless tubes of high-strength low-alloy and weather-resistant steels of square and rectangular cross-section for structural purposes.
EN 10210-1, EN 10210-2：
Applicable shapes: square, rectangular and round cross sections
Suitable materials: Unalloyed and fine-grained structural steels.
Application: Standard specification for cold-formed welded and seamless tubes of non-alloyed and fine-grained structural steel of square, rectangular and circular cross-section for structural purposes.