EN 10216-1, DIN 2448 / DIN 1629 ST44 ST37.0 DIN 1629 ST52.0 Seamless steel pipes
Seamless non-alloy steel tubes for pressure purposes with specified room temperature properties – line pipes
Steel pipes for pressure and thermal purposes with specified room temperature properties – line pipes.
The pipes are used almost in all fields of industry. Thanks to their variety of types and sizes, they can also be used for general purposes. The pipes are manufactured through hot rolling or cold drawing.
The pipes are manufactured with the diameters between 21,3 – 660 mm and with the wall thickness of up to 100 mm in the case of hot rolling, and with the diameters between 10,2 – 108 mm and the wall thickness of up to 12,5 mm in the case of cold drawing.
Standard: DIN1629 Deutsche Industrie Normen
Uses: For manufacture of pipelines,vessels,equipment,pipe fittings and steel structures.
Chemical Composition(%):
| Grade | C | Si | Mn | P | S | Cr | Ni | Cu |
| St37.0 | =0.17 | 0.17-0.37 | 0.35-0.65 | =0.025 | =0.020 | =0.25 | =0.25 | =0.25 |
| St44.0 | =0.21 | 0.17-0.37 | 0.50-0.80 | =0.025 | =0.020 | =0.25 | =0.25 | =0.25 |
| St55 | 0.33-0.41 | 0.17-0.37 | 0.50-0.80 | =0.025 | =0.020 | =0.25 | =0.25 | =0.25 |
| St52.0 | =0.22 | =0.55 | =1.60 | =0.025 | =0.020 | =0.25 | =0.25 | =0.25 |
| Mechanical properties | |||||||
| Pipe types | Steel grades | Upper yield limit Re min for wall thickness in mm min | Tensile strength Rm MPa | Elongation A% min | |||
| ROUND SEAMLESS CARBON STEEL PIPES FOR SPECIAL REQUIREMENTS St37.0, St44.0, St52.0 according to DIN 1629 |
16 | 16 40 | 40 65 | 1 | t | ||
| St37.0 | 235 | 225 | 215 | 350-480 | 25 | 23 | |
| St44.0 | 275 | 265 | 255 | 420-550 | 21 | 19 | |
| St52.0 | 355 | 345 | 335 | 50-650 | 21 | 19 | |
| Tests | Test scope | Test execution status | Material test certification type | |
| No | Type | |||
| 1 | Tensile testing | 1 pipe from the batch 1 try |
To be negotiated | DIN 50049 3.1.A OR DIN 50049 3.1.B OR DIN 50049 3.1 C |
| 2 | Ring testing | From one pipe end for testing according to 1 for wall thickness of 40mm, 1 try | To be negotiated | DIN 50049 3.1.A OR DIN 50049 3.1.B OR DIN 50049 3.1 C |
| 3 | Tightness testing | All pipes | Manufacturer | DIN 50049 2.1 |
| 4 | Surface inspection | All pipes | To be negotiated | DIN 50049 3.1.A OR DIN 50049 3.1.B OR DIN 50049 3.1 C |
| 5 | Dimensional testing | All pipes | To be negotiated | DIN 50049 3.1.A OR DIN 50049 3.1.B OR DIN 50049 3.1 C |
| 6 | Check analysis | After negotiation | Manufacturer | DIN 50049 3.1.B |
DIN 1629 ST44/ST52 Seamless Pipe
Steel Pipe/Din Seamless Pipe/St44 Seamless Pipe/St52 Seamless Pipe/seamless steel pipe
1) Standard: DIN2448, DIN1629, DIN17175, EN10255, EN10216
2) Grade: ST37, ST44, St45, ST52, S355JR
2) Size: From 1/2″ to 32″
3) Wall Thickness: 2-60mm
4) Length: 4M to 12 M
Packing
1) Packing in bundles,
2) Surface: Varnish coating
3) Ends: Beveled or square cut, Plastic capped.
