MS SSAW PIPE

Tianjin Lefin Industrial Co., Ltd is one of the most experienced manufacturers and suppliers of ms ssaw pipe in China. Please feel free to buy high quality ms ssaw pipe from our factory. Good service and reasonable price are available.

MS SSAW Steel Pipe

Dimensions: 219.1mm-3048mm (8"-120")

Wall Thickness: 5.0mm-25.4mm (0.197"-1")

Length: 3m-50m

Pipe Ends: Plain Ends, Beveled Ends, Grooved Ends for small diameter.

Coating: Bare Pipe, Epoxy Coating, FBE, Varnish Coating, 3LPE, 3LPP

Types:

Driven Tubes (Piling): ASTM A252 GR.2, GR.3

Water Pipes: ATM A53 GR.B, BS EN 10217-2 P235GH,BS EN 10217-35 P235GH, ANSI/AWWA C200 A36/GR.50

Oil and Gas Pipes (Line Pipe): API 5L PSL1/PSL2 GR.B/X42-X80

General Structure Pipe: BS EN 10219-1/-2 S235JRH/S355J0H/S355J2H

What are the advantages of SSAW pipe compared with seamless steel pipe?

 

the advantages: 

 

1. Production efficiency and cost:

- SSAW pipe has the advantages of simple production process, low operating cost and low cost operation.

 

2. Adaptability:

- SSAW pipes can be produced from the same width of steel strip to produce different diameters, especially the narrow steel strip can be used to produce large diameter steel pipes.

 

3. Strength and stress distribution:

- When subjected to internal pressure, the resultant stress at the weld of the SSAW pipe is 60-85% of the principal stress of the straight welded pipe. This means that under the same working pressure, the wall thickness of spiral welded pipe with the same diameter can be reduced than that of straight welded pipe, thus improving the utilization rate of materials and the bearing capacity of steel pipe.

 

4. Deformation resistance and damage resistance:

- SSAW tubes have higher resistance to deformation and damage when subjected to complex loads and impact loads.

 

5. Application field:

- SSAW pipe is mainly used for oil and natural gas transmission pipelines, and steel pipe for civil building structures, docks, Bridges and other foundation piles. Because of its high production efficiency, low cost and ability to meet the demand of large diameter steel pipe, SSAW pipe has a wide application prospect in the field of oil and gas transportation.

1. Production flexibility:The production process of SSAW tubes is highly flexible and can produce steel tubes of large diameters and different wall thicknesses, suitable for transporting large quantities of oil and gas.
2. Cost effectiveness:Due to the use of low cost narrowband (plate) coil continuous welding production of large diameter welded pipe, SSAW pipe production process is simple, low operating costs, with low cost operation advantages.
3. Weld quality:The SSAW pipe adopts double-sided submerged arc welding technology, and the welds are inspected by online continuous ultrasonic automatic damage meter to ensure the non-destructive testing coverage of spiral welds.
4. Wide application:SSAW pipe is widely used in natural gas, petroleum, chemical industry, power, heat, water supply and drainage, steam heating, pressure steel pipe for hydropower station, thermal power generation, water and other long-distance transmission pipelines and piling, dredging, bridge, steel structure and other engineering fields.
5. Quality assurance:The quality of SSAW tubes depends on the quality of raw materials and the precision of each production step. Manufacturers follow strict control measures at every stage of the production process and carry out various tests to ensure that the pipes meet all industry standards.
6. International Standards:SSAW tubes implement the international standard API-5L, which specifies the requirements for steel tubes used for the transportation of liquids and gases, including the size, chemical composition and mechanical properties of the tubes.

What are the key steps in manufacturing MS SSAW pipe?

1. Raw material testing:

- Raw materials, including strip steel, wire and flux, undergo rigorous physical and chemical testing to meet quality standards.

2. Unwinding and flattening:

- The steel strip is first unwound and flattened to remove any original crimp or deformation.

3. Cutting and forming:

- The steel plate is cut along the edge and spirally curled along the production line to form a basic tube shape.

4. Butt welding and cutting:

- SSAW tubes are welded using advanced double-sided submerged arc welding technology. This includes pre-welding, internal welding and external welding to ensure the strength and continuity of the weld. After welding is complete, the tube is cut to the required length using plasma cutting technology, ensuring accuracy and compliance with specifications.

5. Welding:

- Welding with single or double wire submerged arc welding technology, using advanced Lincoln welding machines to provide stable welding specifications for internal and external welding.

6. Ultrasonic detection:

- Continuous ultrasonic inspection checks weld lines for defects and ensures 100% NDT coverage. If a defect is detected, an automatic alarm and marking system is triggered for process adjustment and defect removal.

7. Plasma cutting:

- Use an air plasma cutter to cut the spiral tube into single segments.

8. Batch inspection:

After cutting, each batch of pipe is subjected to a rigorous inspection, including testing the mechanical properties, chemical composition, fusion status and surface quality of the weld, followed by non-destructive testing to ensure that the pipe meets production standards.

9. Manual review and testing:

- Any ultrasonic defect marks are reviewed manually using ultrasonic and X-ray tests. If a defect is found, fix it and retest it until it is confirmed that the defect has been eliminated.

10. X-ray examination:

- For areas where butt welds and spiral welds intersect, D-connectors are thoroughly X-rayed, using television or film to ensure integrity.

11. Hydraulic test:

- Each pipe is tested by water pressure, the pressure and duration are strictly controlled by the computer, and all test parameters are automatically recorded and printed.

12. Pipe end processing:

- Tube end machining to ensure verticality, accurate chamfer and smooth edge in preparation for further use of the tube.