ASTM A500 Grade B Welded Piling Pipe 406mm OD with Conical Point for Soil Piling

Engineered to provide excellent ground consolidation and dependable end-bearing capacity, this ASTM A500 Grade B Welded Piling Pipe is optimized for high-performance soil piling. Utilizing a versatile 406mm outer diameter (16-inch equivalent) cold-formed welded steel host pipe, this structural pile is equipped with a heavy-duty pre-welded conical point at the pile tip.
The conical tip seals the pipe bottom, converting the assembly into a closed-end displacement pile that prevents mud, water, and debris from entering the tube during driving. Fully compliant with ASTM A500 Grade B structural standards, this pile offers a minimum yield strength of 290 MPa. It is designed to pierce through dense gravel and clay layers, compacting surrounding soils and transferring heavy vertical building loads directly to reliable bedrock or load-bearing strata.

Features & Advantages

Heavy-Duty Welded Conical Point: The pre-welded cast-steel or plate-steel conical tip protects the pipe end from deformation while driving, facilitates rapid soil penetration, and completely seals the pile for seamless concrete casting.

Certified ASTM A500 Grade B Structural Base: Delivers high yield strength (minimum 290 MPa) and reliable shear resistance, fully rated for load-bearing foundation applications and commercial building structures.

Soil Displacement & Compaction Efficiency: Operating as a closed-end displacement pile, it compacts and densifies the surrounding soil during driving, increasing lateral soil skin friction and overall pile loading capacity.

Highly Uniform Welded Geometry: The high-frequency ERW welding process ensures consistent 406mm wall thickness and excellent dimensional roundness, facilitating easy mechanical attachment or field splicing.

Technical Specifications

Specification Item	Detailed Description
Product Name	Welded Structural Steel Pipe Pile with Conical Point
Standard Specification	ASTM A500 / A500M Grade B (Cold-Formed Welded Carbon Steel Structural Tubing)
Tensile & Yield Strength	Minimum Yield Strength ≥ 290 MPa (42,000 psi); Tensile Strength ≥ 400 MPa (58,000 psi)
Manufacturing Process	ERW (Electric Resistance Welded) base pipe + automated conical tip welding
Nominal Outer Diameter	406.4 mm (Nominal 16 Inch)
Wall Thickness (WT)	Typical 9.53 mm (0.375 in) or 12.7 mm (0.500 in) or customized based on soil dynamics
End Configuration	Closed-end with premium heavy-duty welded Cast Steel Conical Driving Point
Pipe Seam Integrity	100% longitudinal weld seam ultrasonic inspection (UT)
Standard Pipe Length	Standard 6.0m to 12.0m, or customized as per site driving equipment limits

Product Applications

Commercial & Residential Foundations: Deep foundation soil piling for mid-rise structures, warehouse complexes, and shopping malls.

Ground Consolidation & Land Reclamation: Compacting loose sands, soft soils, and high-water-table soils to prevent post-construction settlement.

Foundation Underpinning: Strengthening and stabilization of existing building foundations, bridge abutments, and industrial machinery bases.

Shoring & Trench Retention: Vertical retaining piles driven in gravel-mixed or heavy clay subterranean layers to secure excavations.

Rigorous Quality Control & Manufacturing Process

Our 406mm welded piling pipes undergo a highly standardized manufacturing and welding sequence to ensure structural safety:

Structural Grade Coil Sourcing: Selecting premium carbon steel coils with certified chemical elements to ensure excellent weldability and high ductility during heavy hammer-driving operations.

High-Frequency ERW Forming: Continuously cold-forming the steel strip into a 406mm cylinder and welding it using high-frequency induction. The external weld bead is trimmed completely flush (scarfed) to maintain dimensional roundness.

Precision Conical Point Welding: Utilizing automated multi-pass submerged arc welding (SAW) to securely attach the heavy-duty cast steel conical driving point to the pipe end, ensuring a completely water-tight, high-strength seal.

Non-Destructive Testing & Straightness Sizing: 100% Ultrasonic Testing (UT) along the longitudinal weld seam, alongside rigorous straightness checks (straightness tolerance within 0.15% of total length) to ensure smooth, vertical pile driving.

Frequently Asked Questions (FAQ)

Q1: What is the engineering benefit of the pre-welded Conical Point for soil piling?

A: A pre-welded conical point seals the bottom of the pile, converting it into a closed-end pile. While driving, the conical point acts as a wedge, cutting through dense clay, gravel, or cobble-mixed soils, preventing the pipe ends from collapsing or “toeing.” Furthermore, it keeps the inside of the pipe completely dry and free of dirt, allowing you to pour concrete directly inside after driving.

Q2: What are the physical and mechanical properties of ASTM A500 Grade B round welded tubing?

A: Under ASTM A500 Grade B, round welded structural tubing possesses a minimum yield strength of 290 MPa (42,000 psi) and a minimum tensile strength of 400 MPa (58,000 psi). This high strength-to-weight ratio makes it ideal for load-bearing foundation piles, as it resists severe axial compressive and bending forces without buckling.

Q3: How does a closed-end displacement pile differ from an open-end pile?

A: Open-end piles allow soil to enter the pipe, creating a “soil plug” inside. They have less driving resistance and are ideal for extremely deep driving. Closed-end piles (with conical points) displace and compact the soil outward as they are driven. This outward displacement significantly densifies the surrounding soil, increasing the soil’s lateral skin friction against the steel wall and maximizing the pile’s overall load capacity.

Q4: Can this 406mm pipe pile be filled with concrete after driving?

A: Yes, absolutely. Once the closed-end pipe pile is driven to the designed depth (releasing the hammer), engineers typically drop a steel reinforcing cage inside the dry, empty tube and fill it with high-strength structural concrete. This creates a high-performance “steel-concrete composite pile” that delivers ultimate compression and shear resistance.

ASTM A500 Grade B Welded Piling Pipe 406mm OD with Conical Point for Soil Piling

Features & Advantages

Technical Specifications

Product Applications

Rigorous Quality Control & Manufacturing Process

Frequently Asked Questions (FAQ)

Related Steel Solutions

Bitumen Coated Piling Steel Pipe 813mm OD 12.7mm WT for Corrosive Soil Protection

EN 10219 S355J2H LSAW Steel Pipe Pile 36 Inch 25.4mm WT for Offshore Wind Farm

ASTM A500 Grade B Welded Piling Pipe 406mm OD with Conical Point for Soil Piling

Heavy Wall Thickness SSAW Piling Pipe 1220mm OD for Marine Port Construction

Request A Multi-Quote