Hydrostatic testing machine for pipes
The hydrotester for pipes have been designed for the hydrostatic testing of GRP pipes ND from ND 300 mm up to ND 4000 mm. The test is carried out on pipe bars according to BS 5480 standards, appendix K and M, before the application of the sleeve. The machine is made by the main frame accommodating the pipe length, a water collecting pool under the frame, two end plugs, a set of pipe saddle supports, a water pump for filling the tube, a pressurising pump, a pump for vacuum test (if required) and an electrical board.
In the course of the test a pipe is loaded on the hydrotester support which lifts the pipe to the hydrotester axis level. The upward movement of the hydraulically actuated saddle support positions the pipe between the end plugs of the machine which are regulated according to the pipe length. The plugs close, thus, sealing the pipe and the pipe is filled with water. The water is pumped until creating the test pressure inside the pipe. After a pre-set period of time the pressure is released and the pipe is emptied. The pipe is released from the plugs, brought down by the supports and sent to marking.
Hydrostatic testing machine for sleeves
The hydrotester for sleeves are the machines dedicated to the hydrostatic testing of single GRP sleeves ND from 300 up to ND 4000 mm. The machine consists of a support frame housing the sleeve during the test, sleeve moulds of respective diameters, a pressure system for closing the mould into the sleeve, a pump unit and an electrical board.
The test sequence consists in positioning the mould inside the sleeve. Once under test, the sleeve is sealed, it is filled with water and the test pressure is created. After the performance of the test cycle the pressure is released and the sleeve is emptied. The mould is removed, the sleeve is release and sent to marking.
Universal Tensile Machine
The Universal Tensile Machine is capable of tensile and compression testing modes within a single frame and a beam moved by separate synchronized ball screws driven by brushless motors.
Extremely robust crosshead guides are incorporated in all frame designs providing the highest level of
lateral crosshead stiffness. All frames are equipped with precision ball screws to ensure the accuracy of the speed and position measurement.
These structures utilize VEM highest performance control, acquisition electronics and software to ensure a fast response, high accuracy and exceptional reliability.
A twin column structure provides an increased stiffness and is available with a base stand for setting a convenient working height. The frames can be fitted with a wide range of grips and fixtures for all the required tests to perform an accurate quality control of the pipe.
On the base of the frame different calibrated load cells can be mounted for measuring vertical loads during the traction and compression tests.
The load cells are interchangeable for all frames allowing each frame to operate at full capacity.
The machine architecture and dedicated devices allow performing the following static mechanical tests:
Split disk test according to ASTM D 2290 norm
Parallel plate loading test for pipe stiffness according to ASTM D 2412 norm and ISO 7685
Tensile tests according to ASTM D 638 norm.