Piling Steel Pipe Specification
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Scope
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Steel pipe piling for permanent, structural load-carrying member or as a shell to form cast-in-place concrete piles.
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Specification
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ASTM A252, Grades 2 and 3/modified to 50 ksi min. yield
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Size (OD)
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8.625, 10.750 and 12.750
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Gauge/Wall Thickness
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0.250, 0.313, 0.375 and 0.500 (nominal)
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Strength/Elongation Properties
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Yield: 50 ksi min., 60 ksi min., 75 ksi min., 80 ksi min. Aim to.
Tensile: 66 ksi min. Elongation: 20% min.
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Straightness Tolerance
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1/8” x length (in feet), divided by five
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Weight Tolerance
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Weight must not vary more than 15% over or 5% under.
Piling weight controlled by utilizing minimum-gauge coil stock.
Searing does not weigh each individual length of pipe.
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Chemical Composition
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Carbon: 0.23 max. Manganese: 1.35 max. Meets ASTM A252
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Carbon Equivalent (CE)
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0.45 max (per AWS D1.1)
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Weldability
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AWD D1.1 base metal
Can be welded with AWS prequalified welding procedures
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Testing
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ASTM A370: In-house flattening and cone test per heat
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Material Test Reports
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Material test reports are furnished for each length of pipe.
Steel mill coil certifications/gauge certifications available upon request.
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Marking/ID Stamp
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Ink stenciling on one side of the OD, ID stamping when requested
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STRENGTH LEVELS
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GRADE 2
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GRADE 3
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Yield Strength
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35,000 psi min.
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45,000 psi min.
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Tensile Strength
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60,000 psi min.
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66,000 psi min.
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Elongation % in 2” Min.
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25
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20
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Meets AWS D1.1 Base Metal Welding requirements
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Yes
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Yes
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Advantages of Pipe Piles
As opposed to other options for deep foundations, pipe piles offer several advantages.
1. They lower costs because they are capable of being tailored to meet specific load bearing requirements.
2. They are simple to drive and install, and they’re easy to inspect and test before use.
3. They are sturdy and unlikely to crack or otherwise get damaged while they are being driven into the ground.
4. Additionally, pipe piles can be added to bolster foundation support after construction and during various phases of construction.
Application of Steel Pipe Piles
Pipe piles can be used for the creation of the following:
• Building foundations
• Bridge foundations
• Highway foundations
• Marine structure foundations
• Dock foundations
• Offshore construction foundations
• Railway foundations
• Oilfield construction foundations
• Communication tower foundations
• Column foundations
Types of Piling Steel Pipes
Based on the different soil environments and requirements, Pipe piling could be divided in open end pile (Unplugged pipe pile) and close end pile pipe(Plugged pipe pile).
Process
As soon as we receive your pipe pile designs, our fabrication division will begin creating your pipe piling. Fabrication is usually carried out in these steps:
1. Cut out and etch steel plate with CNC plasma cutters.
2. Bevel the plate ends (if required) to ensure quality welding.
3. Roll the plate into cylinders.
4. Weld the longitudinal seam of the cylinder.
5. Connect cylinders by welding the circumferential seam using our sophisticated submerged arc process.
6. Forward the pipe pile to our testing division, where the completed pipe piling must pass rigorous inspection before shipment to the job site.
7. If project specifies, the steel is blasted and coated to increase longevity.
Tests
Our Testing Capabilities Include:
• Visual inspection and step by step monitoring of all processes to ensure the best possible quality
• Radiographic Testing (RT)
• Ultrasonic Testing (UT)
• Dye Penetrant Testing (PT)
• Magnetic Particle Testing (MT)
• Heat treating and stress relieving
• Hardness Testing
• Impact Testing
• Positive Material Identification (PMI)
• Leak Testing
• Hydrostatic Testing, up to 2,500 psig
• Environmental monitoring and reporting
• Soluble Salt Testing
• Full blast and lining profile measuring
• Dry film thickness testing
• Adhesion Testing
• Lining continuity (holiday) testing
