Pipe Stiffness Testing Machines
Based on expertise and experience in control and testing, LABSEN collaborates with manufacturers for supplying high quality testing machines. Our products are made for Australian conditions, meet the local regulations, perform safely, provide accurate test data and will last for long life.
With LABSEN contribution in improving the system (hardware and control software) and upgrading functions, the machines can be connected with other testing systems (such as external testing machines, data acquisition and/or controllers). Please see Enhancing Functions of Material Testing Machines for more details.
RST series stiffness tester
The machines are used to determine the ring stiffness of circular cross-section thermoplastic pipes, according customer’s request, it can also execute compression, ring stiffness, ring softness and creep ratio test. This tester meet the requirement of all kinds of plastic pipes, structured-wall pipes, PVC, HDPE, LDPE, PE corrugated pipes, helically wound pipes etc., The machines conform with Standard ISO 9969, ISO 9967.
Principle of ring stiffness
The ring stiffness is determined by measuring the force and the deflection while deflecting the pipe at a constant deflection speed. A cut length of pipe supported horizontally is compressed vertically between two parallel flat platens moved at a constant speed that is dependent the diameter of the pipe. A plot of force versus deflection is generated. The ring stiffness is calculated as a function of the force necessary to produce a 3% diametric deflection of pipe.
Principle of creep ratio
A cut length of pipe is placed between two parallel flat horizontal plates and a constant compressive force is applied for 1008 h (42 days). The deflection of the pipe is recorded at specified intervals so as to prepare a plot of pipe deflection against time. The linearity of the data is analysed and the creep ratio is calculated as the ratio between the two years’ extrapolated deflection value and the measured 6 min (0.1 h) deflection.
Listed products
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Model RST-1 Specimen size: < 630mm |
RST-2 Specimen size: < 1000mm |
RST-3 Specimen size: over 1000mm |
| Maximum load | 10kN, 20kN, 30kN, 50kN, 100kN |
| Load resolutions | 0.01N |
| Number of loadcells | 1 to 3 pcs |
| Load accuracy | ±1% |
| Crosshead travel | 100mm – 3500mm |
| Pile diameter range | 16mm – 3200mm |
| Crossbeam speed | 0.1 mm/min～500 mm/min, stepless, adjustable |
| Test width | 420mm to 1000mm |
| Displacement accuracy | 0.001mm |
| Power | 220V/380V AC 50Hz/60Hz |
| Pipe inner diameter measuring device | Yes |
| Creep ratio test (option) | ISO 9967 |
| Time range | 1s – 9999h59m59s |
| Time resolution | 1s |
For more information, please Contatc Us.
