ASTM BS DIN JIS Low Carbon Steel Seamless Pipe 20-450mm Diameter with 3-60mm Wall Thickness
Our seamless pipes are manufactured from solid steel billets through a sophisticated multi-stage process:
- Heating to 2,300°F in walking-beam reheat furnace
- Rotary piercing mill transformation into tube shells
- Mandrel mill processing for precise OD and wall thickness
- 24-stand stretch-reducing mill for final dimensional accuracy
- Continuous monitoring with advanced hot-wall measuring systems
All large-diameter seamless pipes undergo electromagnetic inspection using Amalog-Sonoscope systems:
- Amalog magnetic circuits detect longitudinal defects on inner and outer surfaces
- Sonoscope magnetic circuits identify circumferential defects
- Flux leakage detection via electromagnetic induction ensures defect-free products
| Diameter | 3mm | 3.5mm | 4mm |
|---|---|---|---|
| 32 | 2.146 | 2.46 | 2.762 |
| 38 | 2.589 | 2.978 | 3.354 |
| 42 | 2.885 | 3.323 | 3.749 |
| 45 | 3.107 | 3.582 | 4.044 |
| 50 | 3.477 | 4.014 | 4.538 |
| 54 | 3.773 | 4.359 | 4.932 |
| 57 | 3.995 | 4.618 | 5.228 |
| 60 | 4.217 | 4.877 | 5.524 |
| 63.5 | 4.476 | 5.179 | 5.869 |
| 68 | 4.809 | 5.567 | 6.313 |
| 70 | 4.957 | 5.74 | 6.511 |
| 73 | 5.179 | 5.999 | 6.807 |
| 76 | 5.401 | 6.258 | 7.103 |
| 89 | 6.363 | 7.38 | 8.385 |
| 108 | 7.768 | 9.02 | 10.259 |
| 133 | - | 11.178 | 12.725 |
| 159 | - | 13.422 | 15.29 |
| 219 | - | 18.601 | 21.209 |
| 273 | - | 23.262 | 26.536 |
| 325 | - | 27.75 | 31.665 |
| 355 | - | - | 38.897 |
| 377 | - | - | 41.339 |
| 426 | - | - | 46.777 |
| 450 | - | - | - |
| 480 | - | - | - |
| 530 | - | - | - |
| 630 | - | - | - |
Our three-roll mill produces seamless steel pipes with exceptional dimensional accuracy. Cross-rolling with mandrels ensures uniform wall thickness without defects like scratches or ears.
We maintain extensive stock of carbon seamless tubes, alloy seamless tubes, and precision tubes ranging from 5-426mm diameter and 0.5-60mm wall thickness.
Every pipe undergoes rigorous inspection for surface defects and wall thickness uniformity. We utilize both cold drawing and hot rolling processes to meet diverse application requirements.
Our pipes serve critical applications in petroleum, chemical, power generation, boiler manufacturing, shipbuilding, and mechanical industries worldwide.
- Quality First: Strict adherence to ASTM, BS, DIN, JIS production standards
- Competitive Pricing: Market-based discounts and transparent pricing
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.