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Welded steel pipe & tube

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.

Rectangular/ Square hollow section manufacturing process

Rectangular/ Square hollow section are formed from coils and then ran through a series of dies. They are are welded from the inside to form their shape.


Manufacturing flow chart

Measurement the size
They are measured by their outside dimensions and their wall thickness.

Rectangular/ Square hollow section is commonly available in Q195, Q215, Q235, Q345 grade.

It can be purchased online and at any Metal Supermarkets location. It can be cut to your exact specifications.

Chemical composition
Steel Grade: Q195, Q215, Q235, Q345, S235JR, S275JR, SS4007-
Data Elements(%)
Materal Grade C Mn S P Si
Q195 0.06-0.12 0.25-0.50 <0.05 <0.045 <0.30
Q215 0.09-0.15 0.25-0.55 <0.05 <0.045 <0.30
Q235 0.12-0.20 0.30-0.70 <0.045 <0.045 <0.30
Q345 <0.20 1.0-1.6 <0.04 <0.04 <0.55
Mechanical property
Materal Grade Yield point (Mpa) Tensile Strength (Mpa) Elongation(%)
Q195 >195 315-430 32-33
Q215 >215 335-450 26-31
Q235 >235 375-500 24-26
Q345 >345 470-630 21-22

Weled steel pipe specification, Standard and identification

Electrical resistance welding
Figure1

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.

Galvanized pipe process characteristics

What is Galvanized Steel Pipe? Galvanized steel can be made into a strong plumbing or tubing material -- one that resists corrosion from exposure to water or the elements. It has been used used for water-supply pipes or as a strong tubing for outdoor applications.

Hot dip galvanizing


About Sunny Steel

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.