EN10219 Rectangular Tube (RHS) Sizes

What Are EN10219 Rectangular Tube Sizes?

EN 10219 rectangular tubes are cold-formed welded structural hollow sections widely used in construction, infrastructure, machinery, and steel fabrication. The EN 10219 standard defines the standard dimensions, dimensional tolerances, and sectional properties for rectangular hollow sections (RHS) with outside dimensions up to 500 × 300 mm and wall thicknesses up to 40 mm.
This guide provides the standard EN10219 rectangular tube sizes, dimensions, wall thickness ranges, tolerances, weight information, and technical specifications for quick reference.

EN10219 Rectangular Tube Size Range

According to EN10219, rectangular hollow sections are manufactured within the following dimensional range.

Standard	EN 10219-1 / EN 10219-2
Product Type	Cold-Formed Welded Rectangular Hollow Sections
Manufacturing Process	ERW (Electric Resistance Welded)
Shape	Rectangular Hollow Section (RHS)
Maximum Outside Dimensions	500 × 300 mm
Wall Thickness	Up to 40 mm
Length	6 m, 9 m, 12 m or customized
Surface Finish	Black, Oiled, Hot-dip Galvanized
Steel Grades	S235JRH, S275J0H, S275J2H, S355J0H, S355J2H

EN10219 Rectangular Tube Size Chart

Designation (1)mm	Depth or Width D (2)mm	Thickness (3)mm	Weight (4)kg/m	Area of Section (5)cm2	Moment of Inertia (6)cm4	Radius of Gyration (7)cm	Elastic Modulus (8)cm3	Plastic Modulus (9)cm3
25.0 × 25.0 × 2.6	25	2.6	1.69	2.16	1.72	0.89	1.38	1.76
25.0 × 25.0 × 3.2	25	3.2	1.98	2.53	1.89	0.86	1.51	1.98
30.0 × 30.0 × 2.6	30	2.6	2.1	2.68	3.23	1.1	2.15	2.68
30.0 × 30.0 × 3.2	30	3.2	2.49	3.17	3.62	1.07	2.41	3.08
30.0 × 30.0 × 4.0	30	4	2.94	3.75	3.97	1.03	2.64	3.5
32.0 × 32.0 × 2.6	32	2.6	2.26	2.88	4.02	1.18	2.51	3.11
32.0 × 32.0 × 3.2	32	3.2	2.69	3.42	4.54	1.15	2.84	3.59
32.0 × 32.0 × 4.0	32	4	3.19	4.07	5.02	1.11	3.14	4.11
35.0 × 35.0 × 2.6	35	2.6	2.51	3.2	5.43	1.3	3.1	3.81
35.0 × 35.0 × 3.2	35	3.2	2.99	3.81	6.18	1.27	3.53	4.42
35.0 × 35.0 × 4.0	35	4	3.57	4.55	6.93	1.23	3.96	5.11
38.0 × 38.0 × 2.6	38	2.6	2.75	3.51	7.14	1.43	3.76	4.57
38.0 × 38.0 × 2.9	38	2.9	3.03	3.86	7.68	1.41	4.04	4.97
38.0 × 38.0 × 3.2	38	3.2	3.29	4.19	8.18	1.4	4.3	5.34
38.0 × 38.0 × 3.6	38	3.6	3.63	4.62	8.76	1.38	4.61	5.8

Note: Available dimensions may vary depending on the manufacturer, steel grade, wall thickness, and production capability. Custom sizes can often be supplied upon request.
EN10219 Rectangular Tube Size Chart (Full Version)

EN10219 Rectangular Tube Steel Grades

Several structural steel grades are available under EN10219, allowing engineers to choose materials according to strength requirements.

Steel Grade	Minimum Yield Strength
S235JRH	235 MPa
S275J0H	275 MPa
S275J2H	275 MPa
S355J0H	355 MPa
S355J2H	355 MPa

Among these, S235JRH is commonly selected for general structural applications due to its good weldability and cost-effectiveness, while S355J2H is preferred for heavy-duty structures requiring higher strength.

EN10219 Rectangular Tube Dimensional Tolerances

To ensure consistent structural performance, EN10219 defines manufacturing tolerances for rectangular hollow sections.

Characteristic	Tolerance
Outside Dimensions (H, B < 100 mm)	±1% (minimum ±0.5 mm)
Outside Dimensions (100–200 mm)	±0.8%
Outside Dimensions (>200 mm)	±0.6%
Wall Thickness ≤5 mm	±10%
Wall Thickness >5 mm	±0.5 mm
Concavity / Convexity	Max. 0.8% (minimum 0.5 mm)
Squareness	90° ±1°
Twist	2 mm + 0.5 mm/m
Straightness	0.15% of total length and 3 mm over any 1 m
Mass per Unit Length	±6%

These tolerances help ensure reliable fit-up during fabrication and consistent structural performance in finished projects.

Surface Finish Options
EN 10219 rectangular tubes are available with a variety of surface finishes to suit different service environments and fabrication requirements. The most common options include black steel, lightly oiled, and hot-dip galvanized finishes. Black tubes are widely used for indoor structural applications, while galvanized tubes provide enhanced corrosion resistance for outdoor, coastal, and high-humidity environments. Additional surface treatments can also be supplied according to project specifications or customer requirements.

Packaging and Delivery
To prevent damage during storage and transportation, EN 10219 rectangular tubes are typically bundled with steel straps and protected using plastic end caps, waterproof wrapping, or other packaging methods when required. Depending on the order quantity and destination, the products can be shipped in standard 20-foot or 40-foot containers, by bulk vessel, or through road and rail transportation. Customized packaging and marking are also available for export projects.

Inspection and Quality Control
All EN 10219 rectangular tubes should be manufactured and inspected in accordance with the requirements of EN 10219-1 and EN 10219-2. Before delivery, each batch typically undergoes a series of quality inspections to verify dimensional accuracy, mechanical properties, and weld integrity.
Typical inspection items include:
Dimensional inspection
Visual surface inspection
Wall thickness measurement
Tensile testing
Flattening test
Impact test (where applicable)
Non-destructive testing (NDT)
Chemical composition analysis
Material identification and traceability
These inspection procedures help ensure that the tubes comply with the specified dimensional tolerances and mechanical performance required for structural applications.

EN10219 Manufacturing Process
EN10219 rectangular tubes are manufactured using a cold-forming process followed by high-frequency electric resistance welding (ERW). After welding, the tubes undergo sizing, straightening, cutting, and inspection to meet the dimensional and mechanical requirements specified in the standard.
Typical production process:
Steel Coil → Slitting → Roll Forming → ERW Welding → Sizing → Straightening → Cutting → Inspection → Packaging

EN10219 vs EN10210

Feature	EN10219	EN10210
Manufacturing Process	Cold Formed	Hot Finished
Dimensional Accuracy	Higher	Standard
Residual Stress	Higher	Lower
Surface Finish	Smoother	Rougher
Cost	More Economical	Higher
Typical Applications	General Structural Fabrication	Heavy Structural Engineering

FAQ

What is the maximum size of an EN10219 rectangular tube?
EN10219 covers rectangular hollow sections with outside dimensions up to 500 × 300 mm and wall thicknesses up to 40 mm.

Is EN10219 a welded tube standard?
Yes. EN10219 applies to cold-formed welded structural hollow sections, typically manufactured using the ERW process.

What steel grades are available?
The most common grades are S235JRH, S275J0H, S275J2H, S355J0H, and S355J2H.

What is the wall thickness tolerance?
For wall thicknesses up to 5 mm, the tolerance is ±10%. For thicknesses above 5 mm, the tolerance is ±0.5 mm.