Anti Corrosion Coating SSAW Spiral Steel Pipe For Port Construction
SSAW Spiral Steel Pipe for Port Construction
Specifications
SSAW (Spiral Submerged Arc Welded) pipe is a high-strength, large-diameter steel pipe formed by coiling steel strips into a helix and welding the seams internally and externally. Essential for port construction, these pipes serve as structural piling for piers, foundations, and dredging lines. They are valued for their dimensional flexibility, cost-effectiveness, and superior load-bearing capacity, often featuring protective anti-corrosion coatings like epoxy or 3PE to withstand marine environments.
| American Standard | Standard Name |
| API 5L | Specification for Line Pipe |
SSAW Port Construction Pipe Chemical Composition
Sources American Standard API SPECIFICATION 5L Table 4 — Chemical composition for PSL 1 pipe with t ≤ 25,0 mm (0.984 in)
| Steel Grade | Mass fraction, based on heat and product analyses a,g % |
||||||
| C | Mn | P | S | V | Nb | Ti | |
| max b | max b | max | max | max | max | max | |
| Seamless Pipe | |||||||
| A | 0.22 | 0.9 | 0.03 | 0.03 | – | – | – |
| B | 0.28 | 1.2 | 0.03 | 0.03 | c,d | c,d | d |
| X42 | 0.28 | 1.3 | 0.03 | 0.03 | d | d | d |
| X46 | 0.28 | 1.4 | 0.03 | 0.03 | d | d | d |
| X52 | 0.28 | 1.4 | 0.03 | 0.03 | d | d | d |
| X56 | 0.28 | 1.4 | 0.03 | 0.03 | d | d | d |
| X60 | 0.28 e | 1.40 e | 0.03 | 0.03 | f | f | f |
| X65 | 0.28 e | 1.40 e | 0.03 | 0.03 | f | f | f |
| X70 | 0.28 e | 1.40 e | 0.03 | 0.03 | f | f | f |
| Welded Pipe | |||||||
| A | 0.22 | 0.9 | 0.03 | 0.03 | – | – | – |
| B | 0.26 | 1.2 | 0.03 | 0.03 | c,d | c,d | d |
| X42 | 0.26 | 1.3 | 0.03 | 0.03 | d | d | d |
| X46 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d |
| X52 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d |
| X56 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d |
| X60 | 0.26 e | 1.40 e | 0.03 | 0.03 | f | f | f |
| X65 | 0.26 e | 1.45 e | 0.03 | 0.03 | f | f | f |
| X70 | 0.26e | 1.65 e | 0.03 | 0.03 | f | f | f |
| a. Cu ≤ = 0.50% Ni; ≤ 0.50%; Cr ≤ 0.50%; and Mo ≤ 0.15%, | |||||||
| b. For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for Mn is permissible, up to a maximum of 1.65% for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70., | |||||||
| c. Unless otherwise agreed NB + V ≤ 0.06%, | |||||||
| d. Nb + V + TI ≤ 0.15%, | |||||||
| e. Unless otherwise agreed., | |||||||
| f. Unless otherwise agreed, NB + V = Ti ≤ 0.15%, | |||||||
| g. No deliberate addition of B is permitted and the residual B ≤ 0.001% | |||||||
SSAW Port Construction Pipe Mechanical Properties
Sources American Standard API SPECIFICATION 5L Table 6 — Requirements for the results of tensile tests for PSL 1 pipe
| Pipe Grade | Pipe Body of SMLS and Welded Pipes | Weld seam of EW,LW,SAW and COW pipes | ||
| Yield Strength a | Tensile Strength a | Elongation | Tensile Strength b | |
| Rt0,5 PSI Min | Rm PSI Min | (in 2in Af % min) | Rm PSI Min | |
| A | 210 (30 500) | 335 (48 600) | c | 335 (48 600) |
| B | 245(35 500) | 415 (60 200) | c | 415 (60 200) |
| X42 | 290 (42 100) | 415 (60 200) | c | 415 (60 200) |
| X46 | 320 (46 400) | 435 (63 100) | c | 435 (63 100) |
| X52 | 360 (52 200) | 460 (66 700) | c | 460 (66 700) |
| X56 | 390 (56 600) | 490 (71 100) | c | 490 (71 100) |
| X60 | 415 (60 200) | 520 (75 400) | c | 520 (75 400) |
| X65 | 450 (65 300) | 535(77 600) | c | 535 (77 600) |
| X70 | 485 (70 300) | 570 (82 700) | c | 570 (82 700) |
| a. For intermediate grade, the difference between the specified minimum tensile strength and the specified minimum yield for the pipe body shall be as given for the next higher grade. | ||||
| b. For the intermediate grades, the specified minimum tensile strength for the weld seam shall be the same as determined for the body using footnote a. | ||||
| c. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation: | ||||
| *Please refer to the original standard for the formula in the image. | ||||
| Where C is 1 940 for calculation using Si units and 625 000 for calculation using USC units | ||||
| Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches) , as follows | ||||
| – For circular cross-section test pieces, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) diameter test pieces. | ||||
| – For full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2) | ||||
| – For strip test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2) | ||||
| U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch) | ||||
SSAW Port Construction Pipe Manufacturing process
Raw Material Inspection → Strip Joining → Pre-forming Treatment → Conveyor Control → Roll Forming → Gap Control → Welding → NDT (Non-Destructive Testing) → Single Pipe Cutting → Batch Inspection → Defect Repair → Weld Inspection → Hydrostatic Testing → End Finishing
SSAW Port Construction Pipe Application
- Marine Piling and Foundation Structures
- Pier and Jetty Construction
- Sheet Pile Wall Systems
- Dredging and Reclamation Pipelines
- Berthing and Mooring Structures
- Container Terminal Infrastructure
- Bulk Cargo Handling Facilities
- Shipyard and Dry Dock Construction
- Port Access Bridges and Causeways
SSAW Port Construction Pipe Packing & Loading
→SSAW Pipe is transported in containers
(Nesting Packaging): Large-diameter SSAW pipes can be nested within one another, similar to Russian dolls, to utilize the internal space of larger pipes and minimize the volume of the cargo. This is a "game-changer" for reducing freight expenses and improving supply chain efficiency.
SSAW Pipe is transported by bulk carrier
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