EN 39 is a European harmonized standard that specifies the technical requirements for steel tubes used in scaffolding structures. It ensures that scaffolding tubes meet consistent safety, dimensional, and material quality standards across Europe and other regions adopting EN norms.

Brand: BRISK STEEL

EN 39 defines the requirements for non-alloy steel tubes intended for use in scaffolding, falsework, and temporary structures. It covers:

• Material composition
• Dimensions and tolerances
• Mechanical properties
• Surface treatment (corrosion protection)
• Testing and conformity assessment

Purpose: EN39 is specifically designed for steel tubes used in scaffolding systems. It ensures that these tubes meet the necessary strength, durability, and safety requirements for construction projects within the European Union and other regions that adopt this standard.

Usage: It is widely used in European construction projects where compliance with EU safety directives is mandatory. These tubes are essential for creating temporary structures that support workers and materials during the construction, maintenance, or repair of buildings and other large structures.

This standard ensures that scaffolding tubes are interchangeable, durable, and safe for construction applications.

Steel Grade

• EN 39 tubes are typically made from non-alloy structural steel with the following grades:
• The steel must comply with EN 10219-1/2 (cold-formed welded structural hollow sections).

Chemical Composition

• Low carbon content to ensure weldability and ductility.
• Limits on phosphorus (P) and sulfur (S) to prevent brittleness.

 Standard Tube Dimensions

Tolerances

• Outside Diameter (OD): ±0.5 mm
• Wall Thickness: ±10% of nominal thickness
• Straightness: Max deviation of 1/600 of the tube length

Mechanical And Chemical Properties
Mechanical Properties:
The steel grade commonly used for EN39 tubes is S235GT. These tubes have a minimum yield strength of 235 MPa and a tensile strength range of 340-520 MPa. The elongation is at least 24%, indicating good ductility.

Chemical Composition:
The chemical composition of the steel includes a maximum carbon content of 0.20%, silicon content up to 0.05% (or specific ranges depending on the option), manganese up to 1.4%, phosphorus up to 0.04%, sulfur up to 0.045%, and a minimum aluminum content of 0.02%. These compositions ensure the tubes have the required mechanical properties and corrosion resistance.

Testing And Conformity Assessment
EN 39 requires mandatory testing to verify:

Dimensional accuracy (OD, wall thickness, straightness)
Mechanical properties (tensile test, yield strength)
Galvanizing adherence (zinc coating quality)
Visual inspection (no cracks, excessive deformations)
Manufacturers must provide CE marking (if used in the EU) and certification (e.g., ISO 9001) to prove compliance.

Advantages
High Strength And Durability:
EN39 tubes are manufactured using high-quality steel, ensuring their structural integrity and ability to withstand heavy loads. This makes them ideal for use in scaffolding systems that need to support workers and materials.

Corrosion Resistance:
The hot-dip galvanizing process provides a protective zinc coating that prevents rust and corrosion. This is particularly important for outdoor scaffolding applications where the tubes are exposed to various weather conditions.

Standardized Dimensions:
The standardized dimensions of EN39 tubes make them easy to install and connect. They can be easily cut, threaded, and joined using various fittings and connectors, facilitating quick assembly and disassembly of scaffolding structures.

Compliance With European Standards:
EN39 tubes comply with the stringent safety and quality standards set by the European Union. This ensures that they meet the necessary requirements for use in construction projects within the region.

• Tube-and-coupler scaffolding (modular scaffolding systems)
• System scaffolding (e.g., ring lock, cup lock)
• Falsework and shoring (temporary support structures)
• Stages, event structures, and access platforms

EN 39 is the leading European standard for scaffolding tubes, ensuring safety, durability, and interchangeability. It has largely replaced older national standards (like BS 1139-1) due to its harmonized requirements and stricter quality controls.

For scaffolding projects in Europe (or globally where EN standards are adopted), EN 39-compliant tubes are the preferred choice for reliability and compliance with modern construction regulations.