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Help CenterSteel Sheet & Plate & Steel Sheet Pile，Q235B、SY295、Q355B、SY390、S355GP、Q390、Q420、SY430
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1. Product Overview
Steel sheet piles are hot-rolled or cold-formed carbon steel structural profiles with interlocking clutches on edges. The clutches interlock tightly to form continuous impermeable retaining and water-stop walls. Two main categories are hot-rolled steel sheet piles and cold-formed steel sheet piles, including U-section (Larsen pile), Z-section and straight-web section. With high section stiffness, they are widely applied for foundation shoring, cofferdams, flood control, land reclamation, underground pipe gallery support and other geotechnical, marine and hydraulic projects. The products feature high overall rigidity, excellent clutch water tightness, and can be pulled out and reused repeatedly.
Main Implementation Standards
Chinese National StandardsGB/T 20933-2021 Hot Rolled Steel Sheet PilesGB/T 29654-2013 Cold Formed Steel Sheet Piles
International Export StandardsEN 10248 Non-alloy Hot Rolled Steel Sheet PilesJIS A5523 / JIS A5528ASTM A572 Gr50
Supporting Test StandardsTensile test, cold bending test, dimensional section tolerance inspection, clutch interlock precision test, impact toughness test
2. Main Steel Grades & Applicable Working Conditions
2.1 Q235B, SY295 Ordinary Carbon Steel Sheet Piles
Working condition: Shallow foundation pit support, inland river revetment, simple temporary cofferdams, short-term temporary earth retaining
Performance: Cost-effective, good weldability and piling machinability, meet bearing requirements of conventional shallow soil support
Mechanical index: Yield strength ≥235MPa
2.2 Q355B, SY390, S355GP Low Alloy High Strength Sheet Piles (Mainstream Grade)
Working condition: Deep foundation pits, deep water dock cofferdams, river flood walls, coastal land reclamation, long-term permanent retaining structures
Performance: High yield strength, strong section bending stiffness, excellent resistance to soil lateral pressure and marine corrosion substrate, suitable for heavy load, deep water and long-term service conditions
Mechanical index: Yield strength ≥355MPa
2.3 Q390, Q420, SY430 Extra High Strength Sheet Piles
Working condition: Ultra-deep foundation pits, large deep water docks, heavy-duty permanent port revetments, complex geotechnical projects with high lateral pressure
Performance: Ultra-high yield strength, reduce pile consumption significantly, applicable for hard stratum piling construction
3. Classification & Section Models
3.1 By Production Technology
Hot Rolled Steel Sheet PilesThickness 10–24mm, clutches integrally hot rolled, tight interlock, anti-tearing and superior water stop effect; Models PU22, PU28, PU32, PU40, PZ28, PZ35, PZ40, suitable for deep water and deep pit permanent projects
Cold Formed Steel Sheet PilesThickness 6–14mm, continuously cold bent from steel strips with lower cost and flexible fixed lengths; relatively weak clutch strength, mostly used for shallow temporary support
3.2 Main Section Shapes
U-section (Larsen Pile): Most widely used type, high lateral stiffness and excellent clutch water tightness, universal for shallow & deep foundation pits
Z-section: Symmetrical flanges, superior torsion resistance and large section modulus per single pile, first choice for large docks and deep water cofferdams
Straight Web Section: Flat narrow clutches, specially used for narrow trenches and small ditch support
4. Specification Parameters
Thickness RangeCold formed sheet piles: 6–14mm; Hot rolled sheet piles: 10–24mm
Effective Width: 400mm, 500mm, 600mm, 700mm, 750mm
Section Height: 100mm～600mm
Standard Length: 6m, 9m, 12m, 15m, 18m; Custom random lengths 3–24m available
Dimensional Tolerance: Strictly comply with GB, EN & JIS section tolerance standards, uniform clutch clearance to ensure seamless water stop after assembly
Theoretical Weight: Calculated by linear weight per meter of section; hot rolled piles have higher self-weight and stronger bearing capacity than cold formed piles of same width
5. Complete Production Process
5.1 Hot Rolled Sheet Pile Process
Steel slab refining → High temperature segmented heating rolling → Integrated clutch forming rolling → Cooling & straightening → Quenching & tempering heat treatment (high strength grades) → Cut to fixed length → Clutch precision calibration → Full dimensional & visual inspection → Mark spraying & packing
5.2 Cold Formed Sheet Pile Process
Uncoil hot rolled steel strip → Pickling to remove oxide scale → Multi-pass continuous roll bending forming → Online length cutting → Clutch shaping → Finished product inspection & packing
6. Mandatory Factory Inspection Items
Spectral composition analysis: Strictly limit C, Mn, S, P impurities and control carbon equivalent to guarantee weldability
Mechanical performance test: Room-temperature tensile test, 180° cold bending test, low temperature impact test (for marine engineering)
Full section dimension inspection: Thickness, effective width, section height, clutch shape and interlock clearance
Visual inspection: Free of cracks, scabs, lamination, deformed clutches and distortion defects
Third-party witness inspection (for export orders): Complete standard test reports provided
7. Main Application Fields
Municipal Construction Engineering: Urban deep foundation pit support, underground comprehensive pipe galleries, subway temporary cofferdams, basement earth retaining
Port & Marine Engineering: Dock revetments, dock cofferdams, coastal land reclamation, temporary offshore construction water-stop walls
Water Conservancy & River Engineering: River flood control dykes, reservoir cofferdams, river dredging water barriers, dam reinforcement
Emergency Flood Control Rescue: Temporary flood dykes, subsidence area earth retaining, rapid support for quicksand stratum
Road & Bridge Infrastructure: Deep water cofferdams for bridge caps, subgrade slope reinforcement, temporary earth retaining at tunnel portals
8. Core Product Advantages
Excellent Water Tightness: Precisely integrated interlocking clutches with tiny assembly gaps, zero leakage cofferdams with auxiliary water stop filler
High Bearing Capacity & Rigidity: Integrally hot rolled sections with strong bending and lateral pressure resistance, reduce internal support quantity
Reusable & Recyclable: Can be pulled out and recovered after construction, multiple cycles to cut total project cost
Efficient Construction: Direct piling by piling machines, no large-scale concrete excavation & pouring, shorten construction period and reduce earthwork pollution
Wide Working Condition Adaptability: Multiple strength grades and section models cover all scenarios from shallow temporary support to deep water permanent docks
Flexible Machinability: Cut, weld and extend on site, special-shaped corners and arc cofferdams can be fabricated directly on construction site
9. Delivery, Packing & Logistics
Delivery State: Raw hot rolled black oxide surface; Epoxy coal tar anti-corrosion coating available on request for marine engineering
Pile Marking: Each sheet pile sprayed with steel grade, execution standard, model, length, heat batch number and qualified serial number
Packing: Bundled and fixed with steel strips, both ends protected, covered with rainproof film; Extra-long hot rolled piles shipped in bulk with reinforced binding to avoid deformation
Delivery Lead TimeRegular in-stock Q235B/Q355B U-type hot rolled sheet piles: Delivery within 3–7 days; Custom high strength SY430, special Z-section and anti-corrosion processed piles: 7–10 days, bulk carrier & container shipment available from Tianjin Port
Attached Shipping Documents: Original Mill Test Certificate, mechanical performance test report, section dimension inspection sheet, factory certificate
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