ASTM A252 Grade 3 ERW Piling Pipe 16 Inch 12.7mm WT Steel Tube for Foundation

Our ASTM A252 Grade 3 ERW Piling Pipe is a high-strength, heavy-wall welded steel casing engineered specifically for deep foundation piling and structural support systems. Featuring a prominent 16-inch Outer Diameter and a heavy 12.7mm (0.500 inches) Wall Thickness, this steel tube is designed to withstand extreme compressive loads, severe driving stresses, and harsh underground environmental conditions.
Manufactured using advanced Electric Resistance Welding (ERW) and certified to Grade 3—the highest strength classification within the ASTM A252 standard—this piling pipe serves as a permanent structural cylinder or concrete casing, delivering dependable stability to modern civil engineering and infrastructure projects globally.

ASTM-A252-Grade-3-ERW-Piling-Pipe-16-Inch-12.7mm-WT-Steel-Tube

Product Features & Advantages

Highest Grade Load Capacity: Certified to ASTM A252 Grade 3, offering a superior yield strength of ≥ 310 MPa (45, 000 psi), which provides the maximum loading capacity required for high-rise foundations and heavy civil engineering.

Heavy Wall Resistance to Buckling: The 12.7mm heavy wall thickness ensures magnificent structural rigidity, preventing the pipe from collapse, crimping, or cross-sectional distortion during high-impact hydraulic hammer driving.

High-Frequency ERW Weld Integrity: Utilizing precision High-Frequency ERW forming technology, the longitudinal seam is robustly welded and electronically inspected to ensure weld seam integrity that matches the mechanical strength of the parent steel body.

Optimal Concrete Bonding Texture: The bare, un-coated cylindrical surface profile of our carbon steel piling pipes is chemically optimized to form an exceptional mechanical bond with poured concrete core matrices.

Excellent Field Weldability: Engineered with a controlled chemical carbon composition, these 16-inch pipes can be easily spliced and butt-welded on-site to seamlessly extend piling depth as required by underground geological soil strata.

Technical Specifications

Specification Item	Details / Technical Standards
Manufacturing Standard	ASTM A252 / A252M (Welded and Seamless Steel Pipe Piles)
Steel Grade / Class	Grade 3 (The premium, highest mechanical property grade)
Nominal Pipe Size (NPS)	16 inch (DN 400)
Outer Diameter (OD)	16.00 inches (406.4 mm)
Wall Thickness (WT)	0.500 inches (12.7 mm)
Section Geometry	Cylindrical Structural Hollow Section / Steel Pipe Pile
Theoretical Weight	Approx. 123.31 kg/m (82.86 lbs/ft)
End Configurations	Plain Ends (Square Cut) or Beveled Ends (30° for splicing) with open or closed ends (with drive shoes)
Length Profiles	Single Random Lengths (5.8m / 6m), Double Random Lengths (11.8m - 12m), custom up to 24m

Property	Value in Metric Units	Value in Imperial Units
Minimum Yield Strength	≥ 310 MPa	≥ 45,000 psi
Minimum Tensile Strength	≥ 455 MPa	≥ 66,000 psi
Elongation in 2 in. (50.8mm)	Complies with standard ASTM A252 formula based on testing coupon geometry	Minimum baseline to ensure ductility

Formulated as high-quality structural carbon steel, the material chemistry is strictly balanced to minimize trace elements like phosphorus and sulfur. This maximizes impact toughness and allows rapid, defect-free manual arc welding in challenging field environments.

Product Applications

This 16-inch heavy structural piling pipe is widely specified by geotechnical and civil engineers for transferring heavy superstructural loads into stable deep soil layers:

Bridge & Highway Overpass Foundations: Used as deep foundation friction or end-bearing piles to support river-crossing bridges, highway viaducts, and marine transport infrastructure. Port, Harbor, & Marine Dock Construction: Deployed as heavy-duty wharf piles, dolphin piles, mooring structures, and retaining combi-walls in corrosive marine environments.

High-Rise Building Foundations: Serves as critical micro-piles or cast-in-place structural casing pipe systems to carry colossal static and dynamic building loads.

Industrial Plant & Refinery Basements: Provides underground load-bearing infrastructure for chemical tanks, heavy machinery platforms, and industrial warehouses with high vibration dynamics.

Landslide Prevention & Retaining Walls: Driven in rows as contiguous structural pipe walls to reinforce slopes, secure deep excavation pits, and prevent soil displacement.

Rigorous Quality Control & Manufacturing Process

To ensure structural safety and absolute compliance during municipal and engineering board audits, our ASTM A252 Grade 3 piling pipes undergo rigorous quality checks:

Tensile & Mechanical Testing: Mandatory destructive testing on representative coupons to verify minimum yield strength (310 MPa) and elongation.

Seam Integrity Inspection: High-frequency ERW weld lines are subjected to non-destructive testing (NDT), including ultrasonic or electromagnetic inspection, to ensure weld zone integrity.

Dimensional Verification: Every tube is verified for exact 406.4mm outer diameter tolerances, 12.7mm wall thickness consistency, and precise straightness.

Butt-Weld Edge Prep: Factory-machined 30-degree bevels are audited to ensure smooth, uniform weld prep for rapid field splicing.

Frequently Asked Questions (FAQ)

Q: Why is ASTM A252 Grade 3 preferred over Grade 1 or Grade 2 for foundation piles?

A: The core reason is strength-to-weight efficiency. Grade 3 has a minimum yield strength of 310 MPa, which is significantly higher than Grade 1 (205 MPa) and Grade 2 (240 MPa). This allows a 16-inch Grade 3 pipe to carry much higher structural axial loads and withstand substantially greater driving impacts from hydraulic hammers without thickening the pipe wall unnecessarily,cutting material costs for large projects.

Q: What is the benefit of using an ERW pipe instead of a Seamless pipe for piling applications?

A: ERW (Electric Resistance Welded) pipe piles provide incredible cost-effectiveness and dimensional uniformity. Modern HF-ERW technology guarantees that the weld line is as strong as the steel body. Furthermore, ERW pipes feature exceptionally consistent wall thickness and outer diameter concentricity compared to seamless alternatives. For foundation piling, where large volumes of heavy steel are required, ERW delivers identical structural performance at a fraction of the cost of seamless steel tubes.

Q: How are these 16″ piling pipes connected on-site if we need deeper piles?

A: They are typically connected via field butt-welding. Our 16-inch pipes are supplied with precise
Beveled Ends (30°) to accommodate full-penetration V-groove welds. Geotechnical teams can drive the first section into the ground, position the second section on top, align them using clamping fixtures, and weld them together to achieve the required depth.