Overview
Power your geotechnical drilling operations with our ASTM A519 Grade 4130 Geotechnical Drill Pipe. Available in sizes from Ø60.3 to 114.3 mm (2.375–4.5 in) outer diameter (OD) and 4 to 12.7 mm (0.157–0.5 in) wall thickness (WT), including the industry-standard Ø89 mm x 6 mm (3.504 in x 0.236 in), these seamless or welded steel pipes deliver exceptional strength, durability, and precision for soil sampling in environmental, geotechnical, and groundwater well applications. Engineered for percussive and rotary drilling, they ensure reliable performance in challenging soil conditions, with minimal secondary uses in structural applications.
Why Choose Our Geotechnical Drill Pipe?
·Exceptional Straightness：Straightness within 0.1mm/meter, maintains drilling accuracy and reduces borehole deviation.
·Improved Mechanical Properties – Higher yield strength and fatigue resistance vs. hot-rolled pipes.
·Tight Dimensional Tolerance: Consistent OD, wall thickness, and thread fit. (e.g., Ø89 mm/3.504 in OD ±0.1mm, 6 mm/0.236 in WT ±3%) ensure compatibility with geotechnical rigs.
·Smooth Inner & Outer Surface – Lower friction, easier soil/fluid removal.
·Extended Service Life – Resistant to wear, thread damage, and fatigue failure.
·Global-Standard Sizes: Sizes like Ø89 mm x 6 mm (3.504 in x 0.236 in) and Ø76.1 mm x 6 mm (3 in x 0.236 in) meet industry needs for soil sampling.
·Versatile Performance: Optimized for Geoprobe® DT45 and similar rigs, ensuring efficient core sampling.
Common Steel Grades for Geotechnical Drill Pipe
Our ASTM A519 Grade 4130 drill pipe is complemented by other grades to meet diverse geotechnical needs:
·ASTM A519 4130 (45#): High-strength alloy steel (yield strength: ~520 N/mm², tensile strength: ~690 N/mm²) for soil sampling in mixed soils (e.g., Ø89 mm x 6 mm / 3.504 in x 0.236 in).
·ASTM A519 4140: Higher strength (yield strength: ~655 N/mm², tensile strength: ~862 N/mm²) for deeper or harder soil sampling (e.g., Ø101.6 mm x 8 mm / 4 in x 0.315 in).
·ASTM A519 4340: Ultra-high strength (yield strength: ~710 N/mm², tensile strength: ~930 N/mm²) for extreme geotechnical conditions (e.g., Ø114.3 mm x 10 mm / 4.5 in x 0.394 in).
·API 5DP E75: Standard drill pipe grade (yield strength: ~517 N/mm², tensile strength: ~689 N/mm²) for geotechnical and water well drilling (e.g., Ø76.1 mm x 6 mm / 3 in x 0.236 in).
·API 5DP X95: Enhanced strength (yield strength: ~655 N/mm², tensile strength: ~724 N/mm²) for demanding soil sampling (e.g., Ø89 mm x 6 mm / 3.504 in x 0.236 in).
·API 5DP G105: High strength (yield strength: ~724 N/mm², tensile strength: ~793 N/mm²) for deep geotechnical drilling (e.g., Ø101.6 mm x 8 mm / 4 in x 0.315 in).
·API 5DP S135: Premium strength (yield strength: ~931 N/mm², tensile strength: ~1000 N/mm²) for extreme conditions (e.g., Ø114.3 mm x 10 mm / 4.5 in x 0.394 in).
·AISI 304 (EN 1.4301): Stainless steel for corrosion-resistant drilling in contaminated soils (e.g., Ø89 mm x 6 mm / 3.504 in x 0.236 in).
These grades ensure versatility for soil sampling, groundwater well installation, and geotechnical testing, aligning with standards like API 5DP and GB/T 699.
Manufacturing Process
1. Raw Material Selection – Premium billets (45#, AISI 1045, 4130, 4140) are tested for purity and consistency.
2. Hot Forming – Billets are hot-rolled or forged into hollow tubes.
3. Cold Drawing – Tubes are cold drawn through precision dies to refine dimensional accuracy, roundness, and straightness.
4. Heat Treatment – Quenching + tempering to balance strength, toughness, and fatigue resistance.
5. Straightening – Advanced multi-roll and hydraulic straightening machines ensure the pipe achieves very tight straightness tolerances, reducing drilling deviation.
6. CNC Machining – Ends are turned and prepared for threading.
7. Threading – Q™ (or R/T/API) threads are cut with CNC lathes to ensure reliable torque transfer.
8. Surface Treatment – Black oxide, phosphating, galvanizing, or customer-specified coating.
9. Inspection & Testing – Dimensional checks, straightness inspection, ultrasonic testing, hardness testing, and thread gauging.
10. Packaging – Pipes are fitted with thread protectors and bundled securely.
This process delivers high-performance drill pipe for reliable soil sampling.
Material Specifications
Grade: ASTM A519 Grade 4130 (equivalent to GB/T 699 45#), with options for 4140, 4340, API 5DP E75, X95, G105, S135, AISI 304
Chemical Composition (Grade 4130, % unless specified):
·Carbon (C): 0.28–0.33
·Manganese (Mn): 0.40–0.60
·Phosphorus (P): 0.035 max
·Sulfur (S): 0.040 max
·Chromium (Cr): 0.80–1.10
·Molybdenum (Mo): 0.15–0.25
Mechanical Properties (Grade 4130, Quenched and Tempered):
·Yield Strength: ~520 N/mm²
·Tensile Strength: ~690 N/mm²
·Elongation: 15% (min)
Size Range:
·Outer Diameter (OD): Ø60.3–114.3 mm (2.375–4.5 in)
·Wall Thickness (WT): 4–12.7 mm (0.157–0.5 in)
·Length: R1 (6.1–7.6 m / 20–25 ft), R2 (8.5–10 m / 28–33 ft), R3 (11.6–13.7 m / 38–45 ft), or custom-cut
Common Sizes for Geotechnical Drill Pipe (OD x WT):
·Ø60.3 mm x 6 mm (2.375 in x 0.236 in, lightweight soil sampling)
·Ø76.1 mm x 6 mm (3 in x 0.236 in, standard soil sampling)
·Ø89 mm x 6 mm (3.504 in x 0.236 in, standard soil sampling)
·Ø101.6 mm x 8 mm (4 in x 0.315 in, deeper soil sampling)
·Ø114.3 mm x 10 mm (4.5 in x 0.394 in, heavy-duty geotechnical drilling)
Tolerances (per ASTM A519):
·OD: ±0.05 mm for Ø60.3–100 mm; ±0.1 mm for >100–114.3 mm
·WT: ±3%
·Length: ±50 mm for cut lengths
·Delivery Conditions: Quenched and Tempered, Normalized
·Surface Conditions: Black oxide, phosphate coated, or customer-specified
·Connection Threads: NC26, NC31, NC38, NC40, or custom
Applications
Our ASTM A519 Grade 4130 and other drill pipes (e.g., Ø89 mm x 6 mm / 3.504 in x 0.236 in) are designed for:
Geotechnical Soil Sampling, Site Investigation, Geotechnical Drilling: High-performance drill pipe for:
1. Environmental Testing: Soil analysis for contamination (4130, AISI 304, Ø89 mm x 6 mm).
2. Geotechnical Investigations: Standard penetration testing (SPT), core sampling (4130, 4140, Ø76.1 mm x 6 mm).
3. Groundwater Wells: Installation of monitoring wells (API 5DP E75, X95, Ø101.6 mm x 8 mm).
4. Dynamic Probing: Percussive sampling in mixed soils (4130, G105, Ø89 mm x 6 mm).
5. Civil engineering site assessments
6. Foundation and ground stability analysis
7. Secondary Applications (limited use):
·Small-scale structural supports (e.g., ASTM A519 4140).
·Temporary casings for shallow drilling (AISI 304).
For lighter-duty applications, explore our ASTM A513 Grade 1010 tubing for conveyor rollers.
Quality Assurance
All Grade 4130, 4140, API 5DP, and other pipes comply with ASTM A519, API 5DP, or relevant standards. Test certificates per DIN EN 10204 3.1 verify chemical composition, mechanical properties, and dimensional accuracy. Ultrasonic testing, hardness testing, and thread inspections ensure top performance for geotechnical drilling.
Enhance Your Soil Sampling Efficiency
·Built for Tough Soils: Sizes like Ø89 mm x 6 mm (3.504 in x 0.236 in) and Ø101.6 mm x 8 mm, with grades 4130 to S135, ensure durability and precision.
·Global Standards Compliance: ASTM A519, API 5DP, and GB/T 699 options meet worldwide geotechnical needs.
·Flexible Supply: Stocked standard sizes and customizable lengths for your drilling rigs.
·Expert Guidance: Our team helps you select the ideal grade and size for efficient soil sampling.
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