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Help CenterSteel Sheet & Plate & Steel Sheet Pile，SP-II、SP-III、SP-IV、400×100、400×125
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1. Product Overview
Steel Sheet Pile is special shaped structural steel with continuous interlocking locks on both sides. Single piles interlock tightly to form continuous impermeable retaining and water barrier walls, divided into two main categories: Hot Rolled Steel Sheet Pile and Cold Formed Steel Sheet Pile. Featuring high bending stiffness, excellent water tightness, reusable turnover performance, small construction footprint and short construction period, it serves as core supporting material for geotechnical, hydraulic, port and municipal deep foundation pit projects.
Production Process
Hot Rolled Sheet Pile: Refined slab heating → High-pressure water descaling → Multi-pass rough rolling to form web, flange and lock → Finish rolling for lock dimension calibration → Controlled cooling → Roller straightening to eliminate bending → Flame cutting to fixed length → Lock precision inspection → Shot blasting to remove mill scale → Mechanical property sampling test → Heat number stamping → Anti-rust coating → Steel strapping & wooden pallet storage
Cold Formed Sheet Pile: Hot rolled coil uncoiling → Leveling & degreasing → Multi-pass continuous roll forming for locks → Online cutting to fixed length → Finished product straightening → Full dimensional & appearance inspection → Simple anti-rust treatment & packing
2. Executive Standards & Main Material Grades
2.1 Applicable Standards
GB Hot Rolled Standard: GB/T 20933-2021 Hot Rolled Steel Sheet Piles
GB Cold Formed Standard: JG/T 196-2018 Steel Sheet Piles
EN Standard: EN 10248 (Hot Rolled), EN 10249 (Cold Formed)
JIS Standard: JIS A5528 Hot Rolled Sheet Pile
ASTM Standard: ASTM A328, ASTM A572 Gr50, ASTM A690 Marine Weathering Pile
2.2 Common Grades & Service Conditions
| Grade | Material Type | Minimum Yield Strength | Core Applications |
|---|---|---|---|
| Q235B / S270GP / SY295 | Mild Carbon Steel | ≥235MPa | Shallow foundation pits, inland temporary cofferdams, light river slope protection |
| Q355B / Q355P / S355GP / SY390 | HSLA High Strength Steel | ≥355MPa | Deep foundation pits, port docks, river regulation, bridge cap cofferdams (main engineering grade) |
| Q355NQR / ASTM A690 | Marine Weathering Steel | ≥355MPa | Coastal seawater cofferdams, quay walls, long-term salt fog corrosive environment |
2.3 Main Section Types
U-Type (Larsen Type): Balanced cross-section, tight interlocking locks, most universal for foundation pits, rivers and port projects
Z-Type: Large section modulus, superior bending resistance, suitable for deep water, high earth pressure large cofferdams, dry docks and utility tunnels
Straight Web Type: Locks on two sides, ideal for partition walls, sealed anti-seepage cabins and circular cofferdam splicing
L-Type: Thin light gauge, for trenches, small water channels and simple shallow excavation support
3. Supply Specifications & Dimensional Parameters
3.1 Size Range
Web Thickness: Cold formed 6–14mm; Hot rolled 10–24mm
Effective Width: Main standard sizes 400/500/600/700mm
Effective Section Height: 100–480mm
Standard Fixed Length: 6m, 9m, 12m, 15m, 18m; Custom length 3–24m available
Unit Weight: 25–180kg/m, bulk delivery by full truck or 40HC container
Lock Precision: 100% inspection per piece, smooth interlocking without jamming, uniform splicing gap, water stop paste fillable for zero leakage
3.2 Dimensional Tolerance
Width, height, thickness, camber and twist comply with national export tolerance standards; lock dimensions strictly controlled to guarantee site splicing water tightness; deviation of section modulus and theoretical weight meets engineering design calculation requirements.
4. Standard Mechanical Properties (As-delivered Hot Rolled / Cold Formed)
Take mainstream Q355P hot rolled sheet pile as example:
Yield Strength ReL ≥355MPa
Tensile Strength Rm: 470–630MPa
Elongation A ≥21%
180° Cold Bend Test: No cracks or delamination on web and locks
Lock anti-sliding strength qualified, stable overall lateral displacement resistance of spliced wall
5. Optional Surface Anti-Corrosion Treatments
Hot Rolled Black Finish: Economical type for short-term inland temporary construction, 1–2 turnover cycles
Thin Anti-rust Oil Coating: Standard export configuration, anti-rust for short sea transit & warehouse storage, easy cleaning before piling
Shot Blasting + Shop Anti-rust Primer: For long-term warehouse storage and long-distance ocean shipping, isolate seawater and moisture corrosion
Hot-dip Galvanized Sheet Pile: Zinc coating ≥85μm, for coastal permanent underwater retaining walls, no later anti-corrosion maintenance required
6. Core Product Advantages
Excellent Water Impermeability: Continuous interlocking precision locks, bentonite or water stop paste filling resists high water head seepage from underground water and seawater
High Bending Bearing Capacity: Optimized concave-convex section design, higher section modulus than flat steel plate under same weight, anti-deformation for deep pits and deep water cofferdams
Reusable & Recyclable: Extractable after project completion, 3–8 turnover cycles to reduce overall project cost significantly
Efficient Construction & Small Footprint: Driven directly by piling machine, no large slope excavation, highly adaptable for narrow urban areas, tunnels and subway foundation pits
Wide Geological Adaptability: Single pile driving or composite support with H-beams available, applicable for soft soil and sand gravel layers
Eco-Friendly & Recyclable: 100% steel recyclable without construction waste, complying with green construction standards for hydraulic and municipal works
7. Main Application Fields
7.1 Municipal & Building Construction (Largest Application)
Deep foundation pit support for high-rise urban buildings, subway tunnel pits, utility tunnel enclosures, temporary earth retaining for basements, reconstruction excavation of old residential communities
7.2 Water Conservancy & River Regulation
River slope reinforcement, flood dykes, closure cofferdams, small water channel anti-seepage walls, temporary water barriers for lake dredging
7.3 Port & Offshore Engineering
Quay walls, dry dock cofferdams, temporary water barriers for channel dredging, wind power foundation enclosures, coastal breakwaters
7.4 Road & Bridge Infrastructure
Water-stop cofferdams for bridge caps, subgrade slope support, temporary water isolation structures for river-crossing bridges
7.5 Special Temporary Works
Underground parking garage excavation, anti-seepage enclosures for sewage treatment tanks, salvage cofferdams for sunken ships, temporary water retaining walls for mines
8. Packaging, Marking & Delivery Terms
Seaworthy Export Packaging: Same section & length piles separated by wooden pallets, tightly bundled, edge iron protectors fitted at both ends for collision resistance; fully coated with anti-rust oil and covered by waterproof tarpaulin to avoid rust and lock deformation during ocean transit.
Product Marking: Section model, material grade, length, heat number and standard sprayed on each pile end; complete original Mill Test Certificate (MTC) attached per truck load.
Lead Time: 5–7 days for regular stock; 7–10 days for customized hot-dip galvanized, ultra-long piles over 20m and marine weathering high-strength piles.
Logistics & Shipment: Loading at Tianjin Port, full truck or 40HC container export, FOB Tianjin / CFR / CIF trade terms acceptable.
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