ASTM Q235B A36 Schedule 40 Seamless Carbon Steel Pipe 14-30 Inch Diameter with 0.5-60mm Wall Thickness
ASTM Q235B/A36 Schedule 40 seamless carbon steel pipes are manufactured using advanced three-roll mill technology for superior dimensional accuracy and structural integrity. Available in diameters from 14 to 30 inches with various wall thickness options.
Our seamless pipes begin with solid steel billets heated to 2,300°F and processed through rotary piercing mills, mandrel mills, and 24-stand stretch-reducing mills to achieve precise outer diameters and wall thickness specifications.
| Diameter (mm) | 3mm | 3.5mm | 4mm | 4.5mm | 5mm | 5.5mm | 6mm | 6.5mm | 7mm | 8mm | 8.5mm | 9mm | 10mm | 12mm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 32 | 2.146 | 2.46 | 2.762 | 3.052 | 3.329 | 3.594 | 3.847 | 4.088 | ||||||
| 38 | 2.589 | 2.978 | 3.354 | 3.718 | 4.069 | 4.408 | 4.735 | 5.049 | ||||||
| 42 | 2.885 | 3.323 | 3.749 | 4.162 | 4.562 | 4.951 | 5.327 | 5.691 | ||||||
| 45 | 3.107 | 3.582 | 4.044 | 4.495 | 4.932 | 5.358 | 5.771 | 6.172 | ||||||
| 50 | 3.477 | 4.014 | 4.538 | 5.049 | 5.549 | 6.036 | 6.511 | 6.973 | 7.423 | 8.286 | 8.699 |
Our three-roll mill production ensures high precision with minimal defects such as scratches, ears, and green lines. The cross-rolling action with mandrel provides superior wall thickness accuracy.
We maintain substantial inventory of carbon seamless tubes, seamless special-shaped tubes, alloy seamless tubes, and precision tubes ranging from 5-426mm diameter with wall thickness of 0.5-60mm and lengths of 2-16 meters.
All pipes undergo rigorous inspection with no surface defects, uniform wall thickness, and consistent physical properties.
Suitable for low/medium pressure boiler pipes, high-pressure boiler pipes, shipbuilding pipes, petroleum cracking pipes, fertilizer equipment pipes, and structural applications across petroleum, chemical, power, boiler, shipbuilding, and machinery industries.
- Quality First: Strict adherence to production standards and comprehensive inspection protocols
- Competitive Pricing: Market-based pricing with volume discounts
- Transaction Security: Guaranteed fund protection for all customers
- After-Sales Support: Comprehensive problem resolution and technical assistance
- Long-Term Partnership: Consistent quality, competitive pricing, and professional service
Shandong Zhengde Metal Manufacturing Co., Ltd. is an integrated enterprise with five production bases, over 100 production lines, and products exported to 50+ countries worldwide.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.