Standard & Grade: API 5L PSL1/PSL2 Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70
ASTM A53, ASTM A500, JIS G3466, ASTM A252, ASTM A178, AN/NZS 1163, AN/NZS 1074, EN10219-1, EN10217-1
End: Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends
Surface: Bare, Lightly Oiled, Black/Red/Yellow Painting, Zinc/Anti-corrosive Coating
Packing: Bundled/In Bulk, Plastic Caps Plugged, Waterproof Paper Wrapped
Production Process for ERW steel pipe:
1.Uncoiling --- 2. Leveling --- 3. End cutting --- 4. End shearing welding --- 5. Supercoil accumulator --- 6. Edge cutting --- 7. Ultrasonic detection --- 8. Forming --- 9. Electric induction welding --- 10. Ultrasonic detection for weld seam --- 11. Medium frequency heat treatment --- 12. Air cooling --- 13. Water cooling --- 14. Sizing --- 15. Flying cutting --- 16. Flush-out --- 17. Cropping --- 18. Flattening testing --- 19. Straightening --- 20. End facing and bevelling --- 21. Hydrodynamic testing --- 22. Ultrasonic detection for weld seam --- 23. Ultrasonic detection for pipe end --- 24. Visual and dimensions inspection --- 25.Weighting and measuring --- 26. Marking --- 27. Coating --- 28. Pipe-end protection --- 29. Bending --- 30. Shipping
Specification of ERW steel pipe:
| API 5L/ASTM A53 GR.B (Small Diameter ERW Steel Pipe) | |||
| Outside Diameter | Wall Thickness | Outside Diameter | Wall Thickness |
| 外径 (mm) | 壁厚 (mm) | 外径 (mm) | 壁厚 (mm) |
| 33.4 (1") |
2.1-2.4 | Φ133 | 3.0-5.75 |
| 2.5-3.25 | 6.0-7.75 | ||
| 3.5-4.0 | 8.0-10 | ||
| 42.3 (1.2") |
2.1-2.4 | Φ139.7 (5″) |
3.0-4.5 |
| 2.5-3.5 | 4.75-5.75 | ||
| 3.75 | 6.0-7.75 | ||
| 4.0-5.0 | 8.0-10 | ||
| 48.3 (1.5") |
2.1-2.4 | Φ152 | 3.0-4.5 |
| 2.5-3.25 | 4.75-5.75 | ||
| 3.5-3.75 | 6.0-7.75 | ||
| 4.0-4.25 | 8.0-10.0 | ||
| 4.5-6.0 | Φ159 | 3.25-6.75 | |
| Φ60.3 (2″) |
3.0-4.0 | 6.8-7.75 | |
| 4.25-4.75 | 8.0-10.0 | ||
| 5.0-5.75 | 10.0-11.75 | ||
| Ф73 | 3.0-4.75 | Φ165 | 3.0-6.0 |
| 4.8-5.25 | 6.25-7.0 | ||
| 5.5-7.0 | / | ||
| Φ76.1 (2.5″) |
3.0-4.0 | / | |
| 4.25-4.75 | Φ168.3 | 3.5-5.75 | |
| 5.0-5.25 | 6.0-8 | ||
| 5.5-7.0 | 8.25-8.75 | ||
| Φ88.9 (3″) |
3.0-4.0 | 9.0-9.75 | |
| 4.25-4.75 | 10.0-11.75 | ||
| 5.0-5.25 | / | ||
| 5.5-6.0 | Φ177.8 (Φ180) |
3.75-5.75 | |
| 8 | 6.0-7.75 | ||
| Φ108 | 3.0-4.5 | 8.0-8.75 | |
| 4.75-5.75 | 9.0-9.75 | ||
| 6.0-6.25 | 10.0-11.75 | ||
| 6.5-9.0 | / | ||
| Φ114.3 (4'') |
3.0-4.0 | Φ193.7 |
4.0-6.75 |
| 4.25-4.75 | 6.8-7.75 | ||
| 5.0-6.0 | 8.0-9.75 | ||
| 6.25-7.75 | 10.0-11.75 | ||
| 8.0-10 | / | ||
| Φ127 | 3.0-4.75 | Φ203 | 3.0-6.75 |
| 5.0-5.75 | 6.8-8.0 | ||
| / | 8.25-11.75 | ||
| / | / | ||
Tolerances of ERW steel pipe
| Standard | Grade | Out Diameter Tolerance | Wall Thickness Tolerance |
| ASTM A53 | A | +/-1.0% | +/- 12.5% |
| B | +/- 1.0% | +/- 12.5% |
| Standard | Grade | Chemical Analysis(%) | Mechanical Properties(min)(Mpa) | ||||
| C | Mn | P | S | Tensile Strength | Yield Strength | ||
| ASTM A53 | A | 0.25 | 0.95 | 0.05 | 0.045 | 330 | 205 |
| B | 0.30 | 1.20 | 0.05 | 0.045 | 415 | 240 | |
