≥ 5.0 MPa Hydrostatic Tested
1x20GP Mixed Cargo Ready
Crosshole Sonic Logging Pipe (CSL Tube) Manufacturer & Supplier
Sino East Steel manufactures high-integrity steel sonic logging pipes (CSL tubes) engineered specifically for non-destructive deep foundation testing of bored piles, drilled shafts, and diaphragm slurry walls under ASTM D6760. Featuring precision-formed hydraulic push-fit clamp joints and dual-threaded screw joints with 100% factory hydrostatic pressure verification and dedicated global CIF container consolidation.
Figure: Precision-engineered CSL Sonic Logging Pipes with Push-fit Hydraulic Clamp, Threaded Joints, Bottom Plugs, and Rubber Top Caps.
📊 1. ASTM D6760 Sonic Logging Pipe Specification Matrix
ASTM D6760 / BS 1881 / ISO 9001
| Parameter | Engineering Specification | Quality Assurance & Standards |
|---|---|---|
| Standard Diameter (OD) | 50 mm (2″), 54 mm, 57 mm, 60 mm (Custom 48mm–76mm available) | OD Tolerance ±0.25 mm (ASTM D6760 Section 6.2) |
| Wall Thickness (WT) | 1.0 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm | WT Tolerance ±0.05 mm (High crush resistance) |
| Length Dimensions | 3.0m, 5.8m (for 20GP), 6.0m, 9.0m, 11.8m (for 40GP), 12.0m | Length Tolerance -0 / +10 mm |
| Steel Grade & Acoustic Performance | Q195 / Q235B / ASTM A53 Grade A Mild Steel (Internal sound velocity ≥ 5000 m/s) | EN 10204 3.1 MTC Certified Chemical & Tensile Values |
| Anti-Corrosion Surface | Black Bare Steel / Light Anti-Rust Oiled / Pre-Galvanized (Optional) | Ensures strong mechanical bonding with curing concrete |
| Full Assembly Components | Factory-welded steel bottom plug, EPDM sealing O-rings, rubber top caps | Complete plug-and-play assembly per cage segment |
🔧 2. Connection Joints Engineering Details: Push-fit vs. Threaded Screw vs. Socket Weld
① Hydraulic Push-fit Clamp Joint (钳压式)
Designed with an expanded bell end housing dual EPDM rubber O-rings. The joining pipe is inserted and crimped in 10-15 seconds using a portable manual/hydraulic crimper.
- Assembly Time: 15 seconds / joint
- Seal Type: Radial mechanical compression
- Best For: Southeast Asia, Africa highway & bridge bored piles
② Threaded / Screw Coupler Joint (螺旋式)
Precision CNC machined male and female threaded ends with an integrated internal elastomeric gasket. Assembled by pipe wrench rotation without power tools.
- Assembly Time: 30 seconds / joint
- Tensile Strength: Exceeds pipe body yield strength
- Best For: Middle East (NEOM, UAE) deep shafts > 50m
③ Socket Sleeve Weld Joint (承插焊接式)
Heavy-gauge expanded steel sleeve (WT 2.5mm–3.5mm) for on-site fillet welding. Maximum structural rigidity for marine piling and extreme vibration zones.
- Assembly Time: 2-3 minutes / joint (Welding)
- Wall Thickness: Up to 3.5 mm
- Best For: Offshore jetty piles, heavy cofferdam slurry walls
🛡️ 3. Watertight Quality Control & ≥ 5.0 MPa Hydrostatic Pressure Testing
In bored pile construction, high-slump tremie concrete generates tremendous hydrostatic head pressure (often exceeding 2.0 to 3.5 MPa at pile bottoms). Any pipe leakage causes concrete slurry ingress, which blocks the ultrasonic probe and invalidates the CSL test. Sino East enforces strict QA protocols:
Each batch is tested under 5.0 MPa internal water pressure for 60 seconds with zero leakage or pressure drop.
Push-fit and threaded joints resist > 3.0 kN tensile pull, preventing separation during cage lowering.
High-frequency induction welded seams resist lateral distortion under aggregate impact.
100% de-burred inner rims ensure snag-free lowering of ultrasonic transducers and cables.
🚢 4. Global Port CIF Shipping & 1x20GP Mixed Container Consolidation
Procuring CSL pipes as standalone LCL cargo often incurs high freight. Sino East Steel provides turnkey container consolidation (1x20GP / 1x40HQ), combining Sonic Logging Pipes with foundational infrastructure steel to drastically reduce landed logistics costs:
| Target Destination Region | Key Discharge Ports | Optimal Mixed Cargo Package | Duty & Compliance Support |
|---|---|---|---|
| Middle East / GCC | Jebel Ali (UAE), Khalifa (Abu Dhabi), Dammam & Jeddah (Saudi), Hamad (Qatar) | CSL Pipes (54/57mm) + ES600 Rebar + API 5L Casing | SABER Registration, DCL / ADM Compliance, MTC 3.1 |
| Southeast Asia (ASEAN) | Manila / Batangas (Philippines), Haiphong / HCMC (Vietnam), Jakarta / Surabaya (Indonesia) | Push-fit CSL Pipes (50mm) + BS 4449 Rebar + GI Pipes | Form E Certificate (0% Tariff under ACFTA) |
| Africa (West, East & North) | Tema & Takoradi (Ghana), Lagos / Apapa (Nigeria), Mombasa (Kenya), Alexandria (Egypt) | CSL Pipes + Kwikstage Scaffolding + Coil Nails / Wire | SONCAP (Nigeria), G-CAP (Ghana), KEBS PVoC (Kenya) |
Direct Mill Shipping from Tianjin / Qingdao Port
❓ Deep Foundation & CSL Sonic Logging FAQ
Q1: How many CSL sonic logging tubes are required per drilled shaft / bored pile?
According to international geotechnical engineering standards (ASTM D6760 / FHWA guidelines), the rule of thumb is 1 sonic logging pipe for every 250 mm to 300 mm (1 ft) of shaft diameter. For example: Pile Diameter ≤ 1.0 m requires 3 tubes (equilateral triangle); 1.0 m – 1.5 m requires 4 tubes (square layout); 1.5 m – 2.0 m requires 6 tubes (hexagonal pattern); > 2.0 m requires 8 tubes.
Q2: Why choose steel CSL tubes over PVC pipes for bored pile foundation testing?
While PVC pipes have a lower initial cost, they possess poor acoustic impedance matching with concrete and frequently debond from the curing concrete due to thermal expansion mismatch, producing false defect anomalies. Mild steel sonic logging pipes provide superior concrete bonding, resist crushing forces during high-pressure concrete pouring, and ensure accurate acoustic velocity readings.
Q3: How are CSL tubes shipped and certified for international export?
Sino East Steel bundles CSL pipes in 50-piece hex bundles with end protectors. All shipments are supplied with certified Mill Test Certificates (MTC) per EN 10204 Type 3.1 detailing steel chemical composition, yield strength, and 5.0 MPa hydrostatic test compliance. We provide full trade documentation including Form E (Zero Duty for ASEAN), SABER registration (Saudi Arabia), and SONCAP (Nigeria).
🔗 Explore Related Infrastructure & Foundation Steel Products
- Deformed Steel Bars & High-Strength Rebar (BS 4449 / ASTM A615 / ES600) — Rebar cage assembly for bored piles.
- Hot-Dip Galvanized & ERW Steel Pipes — Structural steel casing and piling pipes.
- API 5L Line Pipe for Middle East Infrastructure — Heavy wall casing and transmission pipes.
- Structural Steel Angles & Channels (ASTM A36 / S275JR / AH36) — Foundation bracing and cofferdam steel.
Looking for ASTM D6760 Sonic Logging Pipes for Your Next Project?
Direct mill pricing, full accessories (caps & plugs), and 1x20GP fast shipping to Jebel Ali, Dammam, Manila, Haiphong, and Lagos.