Ultrasonic Thickness Online (Big Pipe)
Non-contact ultrasonic measurement of wall thickness, eccentricity, ovality and outer diameter while the line runs — theoretical resolution 0.001mm, practical resolution 0.01mm — for pipe from Φ63 to Φ1200.
The pipe thickness measurement follows the principle of ultrasonic pulse reflection: when the probe's ultrasonic pulse reaches the inner/outer interface of the pipe through the medium, it is reflected back to the probe, and by precisely timing that travel the ultrasonic processing unit rapidly calculates the material thickness.
The system is an independently developed, high-end on-line pipe measurement system built on advanced domestic and international technology, using digital processing and high-precision acquisition chips. It comprises the Sealion ultrasonic processing unit, the ultrasonic probe and the scanning structure; the host circuit covers transmission, reception, and display/control. Theoretical measuring resolution is 0.001mm; due to pipe-surface irregularity and the production environment, practical resolution reaches 0.01mm — an advanced level for the industry.
| Stage | What it gives you |
|---|---|
| Start-up | See the pipe's condition directly, cutting waste and defects and shortening start-up. |
| During production | Real-time monitoring of thickness, eccentricity, ovality and OD; every change is monitored and recorded in full, archived so production can be checked at any time — the pipe stays under your control. |
| After warehousing | Even once shipped to site, the database can trace any batch's production data on demand. |
The scanning box conforms fully to any pipe curvature, keeping the probe pulse perpendicular to the pipe surface for accuracy, stabilising the ultrasonic medium and the DSP signal, and reducing the effect of medium instability. The structure is simple and easy to operate.
The number of ultrasonic probes is selectable — 1, 2, 3, 4, 6, 8 or 16 depending on the model; probes are IP68-rated and mount directly in the scanning box inside the water tank.
The system works on ultrasonic principles with high-frequency transducers. High-speed DSP acquisition and processing measure moving pipe and cable on the extrusion line without contact and with automatic centring; an industrial touch screen presents the cross-section with wall-thickness deviation and eccentricity all round, so thickness, eccentricity, ovality and diameter drift can be corrected early — fewer rejects and a shorter start-up.
| Autonomy | DSP receives echoes fast and accurately while distinguishing clutter | Self-adjusting | Even if material changes, DSP self-adjusts the capture window to lock the echo per set parameters |
| High accuracy | DSP processes captured signals synchronously, ensuring measurement accuracy |
Industrial tablet PC with built-in ultrasonic measurement software, clean interface.
| Model | Pipe OD range (mm) | Thickness (mm) | Probes |
|---|---|---|---|
| SL-meas63 | Φ63 | ≤60 | 4 |
| SL-meas125 | Φ63-125 | 60 | 4, 8 |
| SL-meas250 | Φ125-250 | 60 | 4, 8 |
| SL-meas315 | Φ250-315 | 60 | 8, 12, 16 |
| SL-meas450 | Φ315-500 | 60 | 8, 12, 16, 32 |
| SL-meas630 | Φ500-800 | 80 | 8, 12, 16, 32 |
| SL-meas1200 | Φ800-1200 | 100 | 12, 16, 32 |
PE water pipe, PE gas pipe, PPR and PVC extrusion lines where large-diameter wall thickness has to hold.
The probe emits an ultrasonic pulse. A first echo returns from the pipe surface; a second returns after the pulse crosses the wall. The system measures the interval between them and, with the speed of sound in that medium at that temperature, converts it to a wall thickness.
wall thickness S = speed V × time difference TThe speed of sound in water is about 1470 m/s at room temperature. Because speed depends on both material and temperature, the system compensates for them.
All of these conditions must hold together. Sealion provides on-site training at handover, including how to record the centring-device scale so the line can keep these conditions repeatable.
Measuring the wall is only the start. The Sealion ultrasonic software turns every reading into production data you can query, export and trace.
This is a water-coupled instrument: how well it is maintained shows directly in measurement accuracy. These are the standard intervals handed to the line during commissioning training.
SL-meas63 flange: 150mm OD, 83mm ID, for pipe Φ16–63mm.
| Φ16 → bore Φ10 | Φ20 → Φ13 | Φ25 → Φ17 | Φ32 → Φ21 |
| Φ40 → Φ27 | Φ50 → Φ37 | Φ63 → Φ47 | 2 off each |
SL-meas250 flange 1: 430mm OD, 210mm ID, for Φ75–180mm. Flange 2: 430mm OD, 330mm ID, for Φ160–250mm.
| Φ75 → bore Φ35 | Φ90 → Φ50 | Φ110 → Φ60 | Φ125 → Φ70 |
| Φ140 → Φ90 | Φ160 → Φ100 | Φ180 → Φ120 | Φ200 → Φ140 |
| Φ225 → Φ175 | Φ250 → Φ190 | 2 off each | — |
Eccentricity, ovality, drifting walls, scrap at start-up — this is what we solve daily.