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Help CenterSteel Sheet & Plate & Steel Sheet Pile，EN 10248、JIS A5528、ASTM A328、ASTM A572 Gr50、ISO9001
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1. Product Overview
Steel sheet pile is a steel section with interlocking clutches on both edges. Continuous impermeable earth & water retaining walls can be formed by interlocking clutches. It is divided into hot rolled steel sheet pile (mainstream for heavy engineering) and cold formed steel sheet pile (economical type), including U-type (Larssen pile), Z-type and straight web sections. Manufactured with low sulfur & phosphorus structural steel, it features high bending resistance, tight interlock waterproof performance, reusable after extraction and fast construction speed. Widely applied for deep foundation pit support, port docks, cofferdam cut-off, flood dykes, coastal revetments and underground pipe gallery temporary & permanent water conservancy projects, exported in bulk to Southeast Asia, Middle East and African coastal infrastructure projects.
2. Applicable Standards
Domestic Chinese Standards
GB/T 20933-2021 Hot Rolled Steel Sheet Pile (Core Standard for Hot Rolled)
GB/T 29654-2013 Cold Formed Steel Sheet Pile
GB/T 700 Carbon Structural Steel, GB/T 1591 HSLA Structural Steel
International Export Standards
EN 10248, JIS A5528, ASTM A328, ASTM A572 Gr50, ISO9001
Supporting Certifications
CE structural certification, SGS mechanical test report, original Mill Test Certificate (MTC), BV marine engineering certification, interlock permeability test report
3. Main Material Grades (Stainless Steel Excluded)
3.1 Carbon Steel (Cold formed thin gauge, shallow temporary support)
Q235B, equivalent to S235JR & A36, cost-effective for shallow foundation pits and small river temporary cofferdams
3.2 HSLA High Strength Steel (Hot rolled pile, heavy load permanent marine engineering)
Q355B, Q390B, Q420B; export equivalent S355GP, S355JR, A572 Gr50. High bending capacity for docks, deep water cofferdams and deep foundation pits
3.3 Weather Resistant Steel Sheet Pile (Coastal open-air permanent revetment)
Q355NH, Cu-Ni alloy elements to resist marine salt spray corrosion and reduce later maintenance
3.4 Special Hot Rolled Pile Grades
SY295, SY390 national dedicated hot rolled steel
4. Product Classification & Section Features
(1) By Production Process
Hot Rolled Steel Sheet Pile (First Choice for Heavy Engineering)Integrally hot rolled with precise thick clutches, excellent sealing performance and large section modulus for strong lateral pressure resistance. Thickness 10–24mm, suitable for deep water, deep foundation pits and permanent dock retaining walls; main models PU22/PU28/PU32, FSPⅢ/FSPⅣ, PZ28/PZ35.
Cold Formed Steel Sheet Pile (Shallow Temporary Engineering)Room-temperature strip continuous roll forming, uniform wall thickness 8–14mm, flexible fixed length with lower cost; clutch strength weaker than hot rolled type, mainly for shallow foundation pits and municipal temporary trench support.
(2) By Cross Section Shape
U-Type Larssen Pile (Most Widely Used)U-shaped web with high lateral stiffness, tightly fitted clutches for superior water tightness; easy construction, largest consumption for foundation pits, river cofferdams and flood walls.
Z-Type Steel Sheet Pile (Deep Water High Load)Symmetrical flanges with outstanding torsion resistance and high single-pile section modulus; ideal for large ports, deep water cofferdams and permanent coastal retaining walls.
Straight Web Sheet Pile (Special Anti-Seepage Cutoff)Flat narrow cross section, used for anti-seepage partition walls and auxiliary underground continuous water stop structures.
5. Complete Production Process
Hot Rolled Sheet Pile Process
Qualified slab heated to 1100–1250℃ → High pressure water descaling → Multi-pass rough rolling to form web, flange and clutch → Finish rolling to fix clutch dimension → Controlled cooling → Roller straightening to eliminate bending → Flame cutting to fixed length → Clutch precision inspection → Shot blasting to remove mill scale → Sampling mechanical test → Steel stamping with heat batch number → Anti-rust coating → Steel strapping & wooden pallet warehousing
Cold Formed Sheet Pile Process
Hot rolled coil uncoiling → Leveling & degreasing → Multi-pass continuous roll forming for clutches → Online cutting to fixed length → Finished product straightening → Dimension & appearance inspection → Simple anti-rust treatment & packaging
6. Core Technical Parameters
6.1 Size Range
Web thickness: Cold formed 8–14mm; Hot rolled 10–24mm
Effective width: 400mm, 500mm, 600mm, 700mm
Effective height: 100–480mm
Standard fixed length: 6m, 9m, 12m, 15m, 18m, customized length 3–24m available
6.2 Reference Mechanical Properties (Q355B Hot Rolled Pile)
Yield ≥355MPa, Tensile 470–630MPa, Elongation ≥21%; intact clutch after 180° cold bending; permeability coefficient ≤1×10⁻⁷cm/s without leakage after interlocking
6.3 Clutch & Surface Requirements
Smooth clutch free of burr, deformation and material shortage with smooth interlocking fit; surface free of lamination, scar and penetrating cracks; optional hot-dip galvanizing or epoxy coating anti-corrosion, bare black finish with uniform mill scale out of factory.
6.4 Optional Anti-Corrosion Solutions
Bare black steel (short-term temporary project), hot-dip galvanized (permanent coastal marine project), epoxy coal tar pitch coating (river sludge corrosion environment)
7. Core Product Advantages
Integral formed clutches with excellent water stop anti-seepage performanceTightly interlocked clutches eliminate gaps, effectively block groundwater and seawater without extra auxiliary anti-seepage materials for cofferdam and foundation pit construction.
High strength & fast construction to greatly shorten project periodVibratory hammer continuous piling into soil without large-scale excavation support; hot rolled pile with large section modulus reduces multi-layer internal supports for deep foundation pits.
Reusable after extraction to lower overall project costCan be vibrated out for secondary turnover after temporary project completion, no construction waste compared with concrete retaining walls to save total project investment.
Flexible structural fit for complex terrainCan be assembled into straight, arc and square cofferdams, adaptable to river bends, circular foundation pits and curved dock revetments.
Complete anti-corrosion material system for all working conditionsSeparate matching carbon steel, weather resistant steel and galvanized sheet pile for inland foundation pits, coastal salt spray docks and chemical sludge rivers, service life ranging from 10 to 50 years.
Sufficient spot stock & customized deep processing supportRegular stock of standard 6–18m U/Z hot rolled piles, support cutting, beveling, galvanizing anti-corrosion and clutch polishing one-stop processing for bulk container export orders.
8. Main Application Fields
8.1 Water Conservancy & Flood Control Engineering (Largest Consumption)
River dike reinforcement, flood gate wall, river cofferdam cutoff, reservoir anti-seepage wall, coastal wave revetment, seawater breeding enclosure dike
8.2 Port & Marine Engineering
Dock shore wall, deep water dry dock cofferdam, artificial island land reclamation, channel dredging temporary earth retaining, offshore wind power foundation water stop enclosure
8.3 Building Underground Foundation Pit Support
Deep foundation pit of high-rise basement, subway tunnel shaft, underground pipe gallery trench, underground garage temporary earth & water retaining
8.4 Municipal Road Infrastructure
Bridge cap cofferdam, underpass tunnel support, sewage treatment plant anti-seepage tank, rainwater regulation tank wall
8.5 Mine & Emergency Rescue Engineering
Mine tailings pond anti-seepage retaining wall, landslide emergency support, flood season river emergency temporary cofferdam, subgrade collapse reinforcement
8.6 Chemical & Environmental Protection Equipment
Chemical sewage tank anti-seepage wall, waste liquid storage dike, landfill isolation water stop wall
9. Packaging, Shipment & Lead Time
Packaging Methods
Domestic stock: Stacked by same model & length, multi-circumferential steel strapping, supported by steel-wood composite pallets, iron corner guards to protect clutches from collision, wrapped with simple anti-rust film.
Export dedicated packaging: Whole pallet wrapped with thickened waterproof anti-rust plastic film, fixed on IPPC fumigated wooden pallets, fit for 20GP / 40HC container and bulk carrier sea transportation.
2. Delivery Warehouse: Spot goods shipped directly from Tianjin Port
3. Lead Time: 5–7 days for regular U-type hot rolled Q355B stock goods; 10–18 days for customized orders of Z-type, weather resistant steel and hot-dip galvanized products
4. Payment Term: 30% TT advance deposit, balance settled before shipment, L/C letter of credit is not accepted.
10. Mandatory Full Factory Inspection Items
Spectral chemical composition analysis of raw slabs, strictly control harmful impurities S & P
Sampling tensile, cold bending and hardness mechanical performance test per batch
Full dimension inspection: thickness, effective width, length, clutch fit clearance and straightness
Random clutch permeability water stop tightness test without water leakage under simulated water pressure
Visual inspection pallet by pallet to detect clutch deformation, cracks and heavy skin defects
Additional zinc coating weight & adhesion test for galvanized sheet piles
Original Mill Test Certificate, factory certificate and third-party SGS authoritative test report provided
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