X70 Carbon SSAW Steel Pipe

 

API 5L X70 spiral welded pipes are produced through methods such as hot rolling, cold rolling, cold drawing, and hot expanding. They are delivered in hot-rolled and heat-treated conditions. The yield strength of API 5L X70 welded pipes ranges from 485 MPa to 635 MPa, with a tensile strength of 570 MPa to 760 MPa, and a maximum yield ratio of 0.93.

API 5L X70 Spiral Welded Steel Pipe Specification

Standard	API 5L X70
Brand Name	GNEE
Certification	ISO, API, SGS
Type	SSAW/ Pipe
Minimum Order Quantity	1 Ton
Packaging Details	Suitable packing according to the size of the pipes
Delivery Time	15-25 work days
Payment Terms	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability	200000 Tons/year

API 5L X70 Spiral Welded Pipe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

API 5L X70 spiral welded pipe production process:

1. Uncoiling and Plate Inspection: The steel plate is uncoiled and enters the production line, where it undergoes full plate ultrasonic inspection.
2. Leveling and Edge Milling: The steel plate is straightened using a press machine and then subjected to double-sided milling along both edges to meet the requirements for width, edge flatness, and bevel shape.
3. Cutting and Forming: The steel plate is spirally coiled along the outer edge to form a pipe shape on the production line.
4. Welding and Cutting: Advanced double-sided arc welding technology is used for pre-welding, inner welding, and outer welding. The welded steel pipe is then plasma-cut into specified lengths.
5. Visual Inspection: Professional technicians conduct inspections of some basic parameters.
6. Ultrasonic Testing: 100% inspection of the inner and outer welding and both sides of the weld seam.
7. X-ray Testing: 100% X-ray industrial TV inspection of the inner and outer welding, using image processing systems to ensure sensitivity of testing.
8. Hydraulic Testing: Each pipe undergoes individual inspection in a hydrostatic testing machine to ensure it meets the required test pressure.
9. Beveling and End Facing: The qualified pipes undergo end processing to meet the required bevel specifications.
10. Final Inspection: Repeated ultrasonic and X-ray testing, as well as magnetic particle inspection of the pipe ends, to check for welding issues and end defects.
11. Oil Coating and Marking: The qualified pipes are coated with oil for corrosion resistance and marked according to user standards.

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