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Help CenterSteel Sheet & Plate & Steel Sheet Pile，S235GP、S355GP、SY295、SY390、S390GP、KW420
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1. Product Overview
Steel sheet pile is hot-rolled or cold-formed structural profile equipped with interlocking clutches. It connects tightly via interlocks to form a continuous watertight retaining wall for soil and water cutoff. As core foundation material for water conservancy, port, municipal foundation pit, bridge cofferdam and coastal protection projects, it adopts strict control on sulfur and phosphorus impurities with excellent section mechanical performance. The interlocks fit closely to achieve outstanding water sealing effect. It can be extracted and reused repeatedly with fast & convenient installation, suitable for complex geological conditions including soft soil, sandstone and high-salinity coastal mud. Widely applied in temporary support and permanent hydraulic & coastal structural engineering.
2. Core Advantages
Excellent watertight performancePrecision matched concave-convex interlocks leave tiny gaps with low permeability coefficient, fully meeting high anti-seepage demands for deep water and underground foundation pits without water leakage.
Superior bending & load-bearing capacityOptimized concave-convex section design delivers large section modulus, strong resistance against lateral soil and water pressure, ideal for deep foundation pits, high-water-level river channels and heavy-duty retaining walls of large docks.
Fast construction & short project cycleQuick pile driving and splicing via piling machine without large-area excavation support, simplifying on-site procedures and greatly shortening construction period.
Reusable & recyclableComplete extraction after project completion without construction waste, capable of multiple turnover cycles to cut overall long-term project cost.
Wide geological adaptabilityWorkable on soft & hard soil, tidal flats, coastal silt and sand layers; optional anti-corrosion coating resists long-term seawater salt fog erosion.
Complete size & type rangeDivided into heavy hot-rolled type and economical light cold-formed type, with U-type, Z-type, straight-web and L-type sections covering all engineering demands.
3. Applicable Standards
Chinese Domestic StandardsGB/T 20933-2021 Hot Rolled Steel Sheet PileGB/T 29654-2013 Cold Formed Steel Sheet PileJG/T 196-2018 Industrial Standard for Construction Steel Sheet Pile
International Export StandardsEN 10248, JIS A5528, ASTM A328
Supporting Certifications: CE certificate, SGS mechanical test report, original mill test certificate, interlock water permeability inspection report
4. Classification by Production Process & Section Type
(1) Hot Rolled Steel Sheet Pile
Production flow: Molten steel smelting & impurity control → Continuous casting slab high-temperature heating → Integrated rolling of interlocks by special mill → Cooling & straightening → Fixed-length cutting → Dimension & appearance inspectionFeatures: Thick wall, high strength and rigid interlocks, applicable to heavy-duty permanent projects such as deep-water docks, cross-sea cofferdams and flood dykes.Main sections:
U-type (Larssen Pile): Most widely used symmetric section, preferred for temporary foundation pits, bridge cofferdams and riverbank protection;
Z-type: Interlocks distributed on both sides of web with larger section modulus and stronger load capacity, mainly for permanent port & offshore retaining walls;
Straight-web sheet pile: Ultra-high interlock tensile strength, suitable for circular cellular cofferdams, artificial islands and large dry docks;
L-type: Light narrow section for municipal trenches and small temporary ditch support.
(2) Cold Formed Steel Sheet Pile
Production flow: Hot rolled coil uncoiling & leveling → Continuous roll bending to form interlocks → Fixed-length cutting → Straightening inspectionFeatures: Thin wall, light self-weight and low unit price with convenient transportation, suitable for shallow foundation pits, temporary drainage walls and emergency flood control projects.
5. Common Steel Grades
Domestic High-Strength Carbon SteelQ235B, Q355B (main stock grades for municipal & water conservancy projects)
International Export GradesS235GP, S355GP, SY295, SY390, S390GP, KW420
6. Technical Specifications
Wall ThicknessHot rolled: 10mm–24mm; Cold formed: 6mm–14mm
Effective Width400mm, 500mm, 600mm, 700mm, 750mm
Section Height100mm–480mm
Standard Length6m, 9m, 12m, 15m, 18m; Custom length 3–24m available
Surface FinishHot rolled black bare surface (regular stock), hot-dip galvanized anti-corrosion coating, epoxy anti-corrosion coating (special for marine projects)
Inspection RequirementsFree of surface cracks, delamination and burrs; smooth and flexible interlock fitting; tensile, bending and impact test reports available upon request.
7. Main Application Fields
Water Conservancy & Flood Control: River revetment, flood dykes, river cofferdams, water cutoff anti-seepage walls, reservoir reinforcement;
Port & Offshore Engineering: Dock quay walls, breakwaters, land reclamation, offshore wind power foundations, dry dock cofferdams;
Municipal Construction: Urban deep foundation pit support, underground pipe gallery, subway excavation, sewage tank retaining walls;
Bridge Engineering: Temporary construction cofferdams, pier foundation pit support, cross-river watertight enclosures;
Emergency Temporary Works: Flood control emergency, temporary water retaining walls, small trench support, site soil isolation barriers.
8. Supply & Commercial Terms
MOQ: 1 metric ton, mixed order of hot-rolled & cold-rolled models acceptable;
Lead Time: 5–7 days for standard stock goods, 7–15 days for customized galvanized products & special lengths;
Shipping Port: Tianjin Port, Qingdao Port, FOB & CIF trade terms supported;
Packaging: Bundled with steel strips on moisture-proof solid wooden pallets, each bundle marked with heat number, steel grade and section size;
Value-added Services: Custom cutting, bevel machining, interlock sealing treatment; full set English mill test certificates, third-party inspection reports and CE documents supplied.
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