What is MS Square Pipe?

An ms square pipe is a square hollow steel section made from mild steel. The cross-section has four equal sides to form a perfect square. The corners are rounded. Corner radius is typically 2 to 3 times the wall thickness.

To make this pipe, a Steel strip or coil is formed into a square shape. It is then welded along the longitudinal seam using Electric Resistance Welding (ERW). The weld zone is heat treated to match the parent metal properties. This makes the tube behave as a single homogeneous section.

They are also known as SHS (Square Hollow Section) or square tubes. The four flat sides make it easy to connect, weld and bolt. Clean geometric lines suit visible applications like furniture, gates, handrails and architectural structures.

MS Square Pipe Size Chart

Common MS square pipe sizes with weight per meter have been given below: Weight formula: W = 0.0157 x t x (a - t) x 4 kg/m, where t = thickness (mm), a = side dimension (mm).

Length Of External Side In (MM) - 25×25 30×30 32×32 38×38 45×45
Weight (KG) 2.3 9.84 12.00 12.87 15.47 18.50
1.8 7.87 9.56 10.24 12.28 14.65
1.5 6.64 8.05 8.62 10.31 12.29
3.2 13.14 16.16 17.36 20.98 25.20

Properties & Features of MS Square Pipe

MS Square pipe has 4 main properties, like flat surfaces, high section modulus, easy fabrication, and aesthetic design:

  • Flat Surfaces: There are four flat sides. This allows easy welding and bolting. Brackets and plates sit flush against flat faces. You do not need special saddles.
  • High Section Modulus: The square shape provides good bending resistance in both axes. The radius of gyration is equal for both principal axes. This makes the design simple when the load direction changes.
  • Easy Fabrication: Flat sides make cutting and joining simple. It is easy to clamp these in fixtures. Holes are drilled or punched on any face. Mitre cuts are not hard to do.
  • Aesthetic Design: These pipes have a clean geometric look. They look professional. They are a suitable choice for furniture and architectural work.

MS Square Pipe Applications

MS square pipes serve diverse applications in 4 major industries:

Steel Furniture

Tables, chairs, shelving units and office furniture frames. Square profile creates clean lines for modern design. Easy to assemble with standard bolts or by welding.

Gates and Grills

Security gates, window grills and boundary fencing. Flat surfaces allow decorative elements to be welded easily. Galvanized finish provides corrosion protection for outdoor use.

Machine Frames

Equipment housings, conveyor frames and machine guards. Rigid square section resists deflection under load. Flat faces make panel and cover attachment simple.

Agricultural Equipment

Tractor attachments, farm implements and agricultural structures. Robust construction handles rough field conditions because it is easy to repair and modify using basic workshop tools.

100% Certified Testing & Documentation

  • IS 4923 / EN 10219 Compliance verification
  • Mill Test Certificate (EN 10204/3.1B)
  • Dimensional Inspection (size, thickness, straightness, squareness)

Frequently Asked Questions

  • What is the weight of MS square pipe?

    The weight of MS square pipe depends on its size and thickness. Use this formula to calculate it:
    W = 0.0157 x t x (a - t) x 4 kg/m, where t = thickness (mm) and a = side dimension (mm)
    Example: 50 x 50 x 3mm MS square pipe weighs approximately 4.5 kg/m. A 100 x 100 x 5mm square pipe weighs around 14.8 kg/m.

  • What is the difference between SHS and RHS?

    SHS stands for Square Hollow Section. It has four equal sides. RHS is a Rectangular Hollow Section with unequal sides. Both are made using the same ERW process. SHS gives the same bending resistance in all directions. RHS has different properties for its major and minor axes.