MS Round Pipes vs MS Hollow Sections Pipes: Complete Comparison

Steel pipes are widely used in construction, infrastructure, industrial fabrication, warehouses, machinery, and structural frameworks. Two commonly used products are MS round pipes and MS hollow sections.

Both are manufactured from mild steel, but their shapes, structural properties, fabrication requirements, and applications differ.

MS round pipes have a circular cross-section, while MS hollow sections are commonly available in square and rectangular profiles. Each type has advantages depending on the design and operating conditions.

For contractors, engineers, fabricators, and steel buyers, understanding these differences helps in selecting the correct product for construction and industrial projects.

Hi-Tech Pipes Limited, an established steel pipe and tube manufacturer in India, manufactures MS round pipes, Square Hollow Sections (SHS), Rectangular Hollow Sections (RHS), and other structural steel products.

Quick answer: What is the difference between MS round pipes and MS hollow sections?

The main difference between MS round pipes and MS hollow sections is their cross-sectional shape.

MS round pipes have a circular profile and are commonly used in scaffolding, railings, fencing, water transportation, and general fabrication.

MS hollow sections, particularly SHS and RHS, have square or rectangular profiles. They are widely used in structural frameworks, columns, industrial sheds, warehouses, and machinery supports.

Both can be suitable for structural applications when their dimensions, steel grades, and load-bearing properties meet the approved design.

What are MS round pipes?

MS stands for Mild Steel.

MS round pipes are hollow steel tubes with a circular cross-section. They are commonly manufactured from hot-rolled steel coils through the Electric Resistance Welding (ERW) process.

During manufacturing, the steel strip passes through forming rollers that gradually shape it into a round tube. The edges are then welded together using high-frequency welding technology.

After welding, the pipe undergoes sizing, straightening, cutting, and quality inspection.

Key features of MS round pipes

• Circular cross-section
• Available in different outside diameters
• Multiple wall thickness options
• Suitable for welding and fabrication
• Consistent bending properties in different directions
• Available in black steel and specified coated finishes
• Used in structural and non-structural applications

Common applications of MS round pipes

• Construction and scaffolding
• Industrial fabrication
• Railings and fencing
• Agricultural structures
• Water transportation systems
• Machinery components
• Gates and fabricated structures
• General engineering

The circular profile is useful in applications requiring tubular components or members that may experience loads from different directions.

What are MS hollow sections?

MS hollow sections are steel tubes with closed cross-sectional profiles.

In construction and fabrication, the term commonly refers to Square Hollow Sections (SHS) and Rectangular Hollow Sections (RHS).

Circular Hollow Sections (CHS) are also part of the broader structural hollow section category.

MS hollow sections are commonly manufactured using ERW technology. Round welded tubes may undergo additional shaping through sizing rolls to produce square or rectangular profiles.

Types of MS hollow sections

1. Square Hollow Sections (SHS)

Square hollow sections have equal outside dimensions on all four sides.

For example, a 50 × 50 mm SHS has an outside width and height of 50 mm.

SHS products are commonly used in structural columns, industrial frameworks, equipment supports, fabricated steel structures, gates, railings, and solar mounting structures.

2. Rectangular Hollow Sections (RHS)

Rectangular hollow sections have different outside width and height dimensions.

For example, a 100 × 50 mm RHS has an outside width of 100 mm and height of 50 mm.

RHS products are commonly used in roof trusses, industrial sheds, warehouses, building frameworks, machinery supports, and structural fabrication.

Their rectangular geometry provides different bending properties along the two principal axes, which can be useful in structural design.

3. Circular Hollow Sections (CHS)

Circular hollow sections have a round cross-section.

CHS products are used in structural columns, tubular trusses, architectural structures, and other engineering applications.

Although CHS and MS round pipes may appear similar, their manufacturing specifications, grades, and intended applications can differ.

MS round pipes vs MS hollow sections: Key differences

The following table compares their main characteristics.

Neither shape is universally stronger or cheaper. Selection depends on the required structural properties and application.

Which is stronger: MS round pipes or MS hollow sections?

Strength is one of the most important factors when comparing steel pipe profiles. However, comparing strength based only on shape can be misleading.

The structural performance of a steel tube depends on steel grade, cross-sectional area, wall thickness, moment of inertia, section modulus, member length, loading direction, connection design, and buckling conditions.

Strength of MS round pipes

Round steel pipes have a circular cross-section, giving them the same geometric bending properties about any axis through the centre.

This makes them useful in tubular structures where loading directions may vary. Circular tubes also have favourable torsional characteristics for many applications.

Strength of MS hollow sections

Square and rectangular hollow sections are widely used in structural frameworks.

SHS provides equal geometric bending properties about its two principal axes.

RHS has different section properties along its width and height, allowing engineers to orient the member according to the required bending resistance.

For example, an RHS member can be positioned with its larger dimension in the direction where greater bending stiffness is needed.

Which should you choose?

For industrial frames, columns, and roof structures, SHS and RHS are commonly selected because of their section geometry and connection requirements.

For tubular structures, railings, scaffolding, and circular frameworks, MS round pipes may be suitable.

The final selection should be based on engineering calculations and applicable structural standards.

MS round pipes vs MS hollow sections: Weight comparison

Steel pipe weight affects material cost, transportation, fabrication, and installation.

MS round pipe weight formula

Weight (kg/m) = 0.02466 × T × (D − T)

Where D is the outside diameter in millimeters and T is the wall thickness in millimeters.

This formula assumes a carbon steel density of approximately 7,850 kg/m³.

Example: MS round pipe weight

For a round pipe with an outside diameter of 60.3 mm and wall thickness of 3.2 mm:

Weight = 0.02466 × 3.2 × (60.3 − 3.2) ≈ 4.51 kg/m

A 6-meter pipe weighs approximately 27.04 kg.

MS hollow section weight

The theoretical weight of SHS and RHS products depends on their outside dimensions, wall thickness, and corner geometry.

For example, a 50 × 50 × 3 mm SHS has an outside width of 50 mm, height of 50 mm, and nominal wall thickness of 3 mm.

Actual weight should be checked against the manufacturer's section table because corner radii and dimensional tolerances affect the result.

Which weighs less?

A round pipe may weigh less than a particular square or rectangular section, but this is not a general rule.

A meaningful comparison requires equivalent material grades and the structural properties needed for the application.

MS round pipes vs MS hollow sections: Applications

1. Building construction

MS round pipes are commonly used in scaffolding, railings, fencing, and tubular structures. SHS and RHS products are frequently used in columns, structural frames, roof trusses, and other building components.

2. Industrial sheds and warehouses

Industrial sheds require steel members for frames, supports, bracing, and roofing structures. Square and rectangular hollow sections are widely used because their flat surfaces can simplify fabrication and structural connections.

3. Infrastructure projects

Steel tubes are used in transportation infrastructure, public utilities, fabricated structures, and supporting frameworks. The appropriate section depends on the project design.

4. Solar mounting structures

Solar projects use steel tubes and structural sections for mounting frames, columns, bracing, and tracker components. The required profile depends on the mounting system design, structural loads, and environmental conditions.

5. Agriculture and fencing

MS round pipes are commonly used for agricultural structures, fencing, and selected irrigation applications. Square and rectangular sections may also be used for gates, frames, and equipment supports.

6. Machinery and equipment

Industrial equipment manufacturers use both round pipes and hollow sections. Round tubes are useful for certain mechanical and tubular components, while SHS and RHS are frequently selected for equipment frames and supporting structures.

Fabrication differences between round pipes and hollow sections

Welding and connections

Round pipes have curved surfaces. Connecting them to flat plates or other members may require shaped cuts, saddles, or specially designed joints.

SHS and RHS have flat surfaces that can simplify connections with plates, brackets, and other structural components.

Cutting and assembly

Square and rectangular profiles can be convenient for positioning and aligning fabricated members. Round tubes may require additional fixtures for some fabrication operations.

Bending and forming

Round pipes are often used for curved tubular components. The required bending process depends on pipe dimensions, material properties, and bend radius.

Surface finishing

Both types can be painted, galvanized, or coated according to project requirements. Surface preparation and coating specifications should match the operating environment.

Cost comparison: MS round pipes vs MS hollow sections

The cost of steel pipes depends on steel grade, section dimensions, wall thickness, weight per meter, manufacturing process, surface finish, order quantity, market prices, transportation, and fabrication requirements.

MS round pipes may be economical for common tubular applications.

SHS and RHS may reduce fabrication complexity in certain structural assemblies because of their flat faces and connection geometry.

For industrial projects, compare the total installed cost rather than the purchase price alone.

Quality standards for MS pipes and hollow sections

Steel pipes and structural sections should meet the applicable manufacturing standards.

Buyers should verify the steel grade, dimensions, wall thickness, mechanical properties, dimensional tolerances, and testing documentation.

How to choose between MS round pipes and MS hollow sections

Choose MS round pipes when:

• A circular profile is specified
• The application involves railings or tubular structures
• Scaffolding or fencing requires round tubes
• The design uses curved tubular components
• A suitable round section meets the structural requirements

Choose MS hollow sections when:

• The project requires square or rectangular structural members
• Flat surfaces are useful for fabrication and connections
• The application involves industrial frames or columns
• The design uses roof trusses or equipment supports
• The specified SHS or RHS provides the required section properties

Always confirm the material grade, dimensions, loading conditions, and applicable standards before purchasing.

MS round pipes and hollow sections manufacturer in India: Hi-Tech Pipes

Hi-Tech Pipes Limited is an Indian manufacturer of steel pipes, tubes, and structural steel products.

The company's product portfolio includes MS round pipes, ERW steel pipes, Square Hollow Sections (SHS), Rectangular Hollow Sections (RHS), Circular Hollow Sections (CHS), black steel pipes, galvanized steel pipes, pre-galvanized steel pipes, and structural steel tubes.

Hi-Tech Pipes supplies products for construction, infrastructure, industrial fabrication, agriculture, solar energy, and general engineering.

For technical specifications, available dimensions, and product enquiries, visit Hi-Tech Pipes Limited.

Frequently asked questions

1. What is the difference between MS round pipes and MS hollow sections?

MS round pipes have a circular cross-section. MS hollow sections commonly refer to square and rectangular steel tubes used in structural frameworks and fabrication. Technically, circular hollow sections are also a type of structural hollow section.

2. Which is stronger, round pipe or square hollow section?

Neither is universally stronger. Strength depends on steel grade, dimensions, wall thickness, section properties, loading direction, and member length.

3. Which is better for building construction?

Both are used in construction. MS round pipes are common in scaffolding, railings, and tubular structures, while SHS and RHS are frequently used in columns, frames, and roof structures.

4. What is the full form of SHS and RHS?

SHS stands for Square Hollow Section. RHS stands for Rectangular Hollow Section.

5. Are MS hollow sections manufactured using ERW technology?

Yes. Many MS hollow sections are manufactured through ERW production, followed by shaping and sizing operations to achieve square or rectangular profiles.

6. Which is cheaper, MS round pipes or MS hollow sections?

Cost depends on dimensions, wall thickness, steel grade, weight, finish, and order quantity. Compare quotations based on equivalent project requirements.

7. Can MS round pipes and hollow sections be galvanized?

Yes. Suitable MS round pipes and hollow sections can be galvanized to provide zinc-based corrosion protection.

8. Who manufactures MS round pipes and hollow sections in India?

Hi-Tech Pipes Limited manufactures MS round pipes, ERW steel pipes, square hollow sections, and rectangular hollow sections for construction, industrial, and infrastructure applications.

Conclusion

MS round pipes and MS hollow sections are widely used in construction, infrastructure, industrial fabrication, and engineering projects.

Round pipes are commonly selected for scaffolding, railings, fencing, and tubular structures. Square and rectangular hollow sections are widely used in structural frameworks, columns, industrial sheds, warehouses, and equipment supports.

The correct selection depends on the required dimensions, steel grade, structural properties, fabrication methods, and project specifications.

Hi-Tech Pipes Limited manufactures MS round pipes and structural hollow sections for customers across India.

Explore our products: MS Hollow Sections | ERW Steel Pipes | Black Steel Pipes