Products / Round pipe
Round pipe
Welded and seamless structural round pipe. The tables calculate nominal mass from outside diameter and wall thickness at 7.85 g/cm³. They are illustrative size matrices, not complete standard or stock schedules.
- Weight rule
- 0.02466 × s × (D − s) kg/m
- European ODs
- 21.3 to 323.9 mm
- CIS ODs
- 32 to 325 mm
- Standards
- EN 10219 · EN 10210 · GOST 10704 · GOST 8732
The outside diameter is only half the specification.
These pipes share the same outside diameter. The thicker wall changes the inside opening and increases mass per metre by 60.8%.
Send the complete designation from your drawing with your quote request.
Calculated nominal mass at 7.85 g/cm³. Illustrated sizes do not imply a particular grade, pressure rating or stock availability.
Sizes and weights by standard
Weights are theoretical, from nominal dimensions at 7.85 g/cm³: Actual delivered mass and billing basis must be confirmed with the quotation. Verified tables have been checked against the stated standard or catalogue source; Calculated values are nominal estimates, subject to the stated assumptions.
EN 10219 · EN 10210European outside diameters
Calculated
Diameters used by European and Turkish mills. Each cell is kg per metre for that outside diameter (rows) and wall thickness (columns).
| ODmm | 2wall, mm | 2.5wall, mm | 3wall, mm | 3.5wall, mm | 4wall, mm | 5wall, mm | 6wall, mm | 8wall, mm | 10wall, mm | 12wall, mm |
|---|---|---|---|---|---|---|---|---|---|---|
| 21.3 | 0.952 | 1.16 | 1.35 | 1.54 | 1.71 | – | – | – | – | – |
| 26.9 | 1.23 | 1.50 | 1.77 | 2.02 | 2.26 | 2.70 | – | – | – | – |
| 33.7 | 1.56 | 1.92 | 2.27 | 2.61 | 2.93 | 3.54 | 4.10 | – | – | – |
| 42.4 | 1.99 | 2.46 | 2.91 | 3.36 | 3.79 | 4.61 | 5.39 | 6.79 | – | – |
| 48.3 | 2.28 | 2.82 | 3.35 | 3.87 | 4.37 | 5.34 | 6.26 | 7.95 | – | – |
| 60.3 | 2.88 | 3.56 | 4.24 | 4.90 | 5.55 | 6.82 | 8.03 | 10.3 | 12.4 | 14.3 |
| 76.1 | 3.65 | 4.54 | 5.41 | 6.27 | 7.11 | 8.77 | 10.4 | 13.4 | 16.3 | 19.0 |
| 88.9 | 4.29 | 5.33 | 6.35 | 7.37 | 8.37 | 10.3 | 12.3 | 16.0 | 19.5 | 22.8 |
| 114.3 | 5.54 | 6.89 | 8.23 | 9.56 | 10.9 | 13.5 | 16.0 | 21.0 | 25.7 | 30.3 |
| 139.7 | 6.79 | 8.46 | 10.1 | 11.8 | 13.4 | 16.6 | 19.8 | 26.0 | 32.0 | 37.8 |
| 168.3 | 8.20 | 10.2 | 12.2 | 14.2 | 16.2 | 20.1 | 24.0 | 31.6 | 39.0 | 46.3 |
| 219.1 | – | 13.4 | 16.0 | 18.6 | 21.2 | 26.4 | 31.5 | 41.6 | 51.6 | 61.3 |
| 273 | – | – | 20.0 | 23.3 | 26.5 | 33.0 | 39.5 | 52.3 | 64.9 | 77.2 |
| 323.9 | – | – | – | 27.7 | 31.6 | 39.3 | 47.0 | 62.3 | 77.4 | 92.3 |
GOST 10704 · GOST 8732CIS outside diameters
Calculated
Diameters common in CIS-origin pipe. GOST 10704 is electric-welded; GOST 8732 is seamless hot-deformed (OD 25 to 820 mm, wall 2.5 to 75 mm).
| ODmm | 2wall, mm | 2.5wall, mm | 3wall, mm | 3.5wall, mm | 4wall, mm | 5wall, mm | 6wall, mm | 8wall, mm | 10wall, mm | 12wall, mm |
|---|---|---|---|---|---|---|---|---|---|---|
| 32 | 1.48 | 1.82 | 2.15 | 2.46 | 2.76 | 3.33 | 3.85 | – | – | – |
| 38 | 1.78 | 2.19 | 2.59 | 2.98 | 3.35 | 4.07 | 4.73 | – | – | – |
| 42 | 1.97 | 2.44 | 2.89 | 3.32 | 3.75 | 4.56 | 5.33 | 6.71 | – | – |
| 45 | 2.12 | 2.62 | 3.11 | 3.58 | 4.04 | 4.93 | 5.77 | 7.30 | – | – |
| 57 | 2.71 | 3.36 | 3.99 | 4.62 | 5.23 | 6.41 | 7.55 | 9.67 | 11.6 | – |
| 76 | 3.65 | 4.53 | 5.40 | 6.26 | 7.10 | 8.75 | 10.4 | 13.4 | 16.3 | 18.9 |
| 89 | 4.29 | 5.33 | 6.36 | 7.38 | 8.38 | 10.4 | 12.3 | 16.0 | 19.5 | 22.8 |
| 102 | 4.93 | 6.13 | 7.32 | 8.50 | 9.67 | 12.0 | 14.2 | 18.5 | 22.7 | 26.6 |
| 108 | 5.23 | 6.50 | 7.77 | 9.02 | 10.3 | 12.7 | 15.1 | 19.7 | 24.2 | 28.4 |
| 114 | 5.52 | 6.87 | 8.21 | 9.54 | 10.9 | 13.4 | 16.0 | 20.9 | 25.6 | 30.2 |
| 127 | 6.17 | 7.68 | 9.17 | 10.7 | 12.1 | 15.0 | 17.9 | 23.5 | 28.9 | 34.0 |
| 133 | 6.46 | 8.05 | 9.62 | 11.2 | 12.7 | 15.8 | 18.8 | 24.7 | 30.3 | 35.8 |
| 159 | 7.74 | 9.65 | 11.5 | 13.4 | 15.3 | 19.0 | 22.6 | 29.8 | 36.7 | 43.5 |
| 168 | 8.19 | 10.2 | 12.2 | 14.2 | 16.2 | 20.1 | 24.0 | 31.6 | 39.0 | 46.2 |
| 219 | – | 13.3 | 16.0 | 18.6 | 21.2 | 26.4 | 31.5 | 41.6 | 51.5 | 61.3 |
| 273 | – | – | 20.0 | 23.3 | 26.5 | 33.0 | 39.5 | 52.3 | 64.9 | 77.2 |
| 325 | – | – | – | 27.7 | 31.7 | 39.5 | 47.2 | 62.5 | 77.7 | 92.6 |
GOST 3262-75Water and gas pipe
In verification
Pipe by nominal bore (DN15, DN20…) in light, ordinary and reinforced walls, often galvanised.
We do not publish a figure we have not checked. Need this now? We source it per order: request a quote with the designation from your drawing.
ASTM A53 · A500American pipe and round HSS
In verification
Pipe by nominal size and schedule, and round structural tubing to A500.
We do not publish a figure we have not checked. Need this now? We source it per order: request a quote with the designation from your drawing.
GB/T 3091 · GB/T 8162Chinese pipe
In verification
Welded (often galvanised) and seamless structural pipe.
We do not publish a figure we have not checked. Need this now? We source it per order: request a quote with the designation from your drawing.
Grades across standards
Close in strength, not identical in chemistry or impact testing. Confirm the exact sub-grade per project.
| Role | GOST | EN | ASTM | GB |
|---|---|---|---|---|
| Mild, ~235 MPa | St3sp | S235JR | A36 (250) | Q235B |
| Mid, 275 MPa | – | S275JR | – | Q275 |
| High, ~355 MPa | 09G2S (345) | S355JR / J2 | A572 Gr50 (345) | Q355B |
Theoretical and delivered weight
Multiply the nominal table weight by the ordered length or area to estimate theoretical mass. Delivered mass can vary with manufacturing tolerances. Confirm whether the quotation and invoice use theoretical or weighed mass.
Galvanised weight
Hot-dip galvanising coats every surface, so it adds more to light, thin sections than to heavy ones: roughly 1.5% on heavy plate, up to 8 to 10% on a light angle or thin tube. Compare galvanised to galvanised. Minimum coating per EN ISO 1461:
| Steel thickness | Mean coatingµm | Mean coatingg/m² per side |
|---|---|---|
| over 6 mm | 85 | 610 |
| 3 to 6 mm | 70 | 505 |
| 1.5 to 3 mm | 55 | 395 |
| under 1.5 mm | 45 | 325 |
Need a size or standard not listed?
We hold no stock yard, so we are not limited to one. Send the designation from your drawing and we will source the round pipe to it.