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ERW Steel Pipe

Pipe Type: ERW Pipe, ERW Steel Pipe, Electric Resistance Welded Pipe
Application:
 
For Low Pressure Fluid Transmission, Machinery Manufacturing

Specification: OD: 21.3mm ~ 660mm

                          WT: 1mm ~ 17.5mm

                          LENGTH: 0.5mtr ~ 22mtr (5.8/6/11.8/12 meters, SRL, DRL)

Standard & Grade: ASTM A53, Grade A/B/C

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
/ /

API 5L GR.B/ASTM A53 GR.B (HOT EXPANDED ERW STEEL PIPE)
Outside Diameter Wall Thickness  Outside Diameter  Wall Thickness 
外径 (mm) 壁厚 (mm) 外径 (mm) 壁厚 (mm)
245, 273 5.0-9.28 450, 457, 508, 530 6.5-11.98
9.45-9.98 12.0-14.5
10.0-11.78 15.0-17.8
299 5.0-9.28 18.0-20.0
9.45-9.98 560, 610, 630 6.5-11.98
10.0-11.78 12.0-14.5
325 5.5-9.28 15.0-17.8
9.48-10.48 18.0-20.0
10.58-11.78 660 7.5-11.98
351, 355, 377 5.5-11.98 12.0-14.5
12.0-15 15
15.5-16 720, 820 8.5
402, 406, 426 5.5-11.98 12.0-14.5
12.0-14.5 15.0-19.98
15.5-16 18.0-20.0


API 5L/ASTM A53 GR.B (Hot Rolled ERW Steel Pipe)
Outside Diameter  Wall Thickness  Outside Diameter  Wall Thickness 
外径 (mm) 壁厚 (mm) 外径 (mm) 壁厚 (mm)
219245 5.0-11.75 462 5.75-11.75
273 5.0-11.75 12.5-13.75
12.5-13.75 457478 5.75-11.75
299 5.5-11.75 12.5-13.75
12.5-13.75 14.5-17.75
325 5.5-11.75 508 5.75-11.75
12.5-13.75 12.5-13.75
355 5.5-11.75 14.5-17.75
12.5-13.75 529/559/610/630 5.75-11.75
377 5.75-11.75 12.5-13.75
12.5-13.75 14.5-17.75
406 5.75-11.75 660 7.5-11.75
12.5-13.75 12.5-13.75
/ 14.5-17.75

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%

 Chemical Analysis & Mechanical Properties of ERW steel pipe

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