The digital display pipe ring stiffness testing machine is suitable for the ring stiffness, ring flexibility and flatness test of various pipes. According to the special needs of users, it can also increase the three test functions of the universal testing machine (ie tension, compression, Bending), is a multifunctional electronic universal testing machine. Product description: It is suitable for the ring stiffness, ring flexibility and flatness test of various pipes. According to the special needs of users, three test functions of the universal testing machine (ie tension, compression, bending) can be added. It is a multifunctional electronic Universal testing machine. It adopts embedded single-chip microcomputer structure, equipped with preemptive multi-task operation system, built-in powerful measurement and control software, so that this series of measurement and control instruments integrate measurement, control, calculation, and storage functions. The MaxTC261 type integrates a standard network Function, using high-speed Ethernet communication, it can be connected with a PC through an ordinary network cable to realize data sharing. In addition, this series of measurement and control instruments also have the characteristics of stable performance, powerful functions, and the built-in software can be downloaded and upgraded. It is an ideal equipment for the modernization, technology, network, and automation of the laboratory. Technical Parameters: 1. Maximum test force: 20kN 2. Accuracy level: level 1 3. Measuring range of test force: (0.4-20) KN 4. Test force indication error limit: within ±1.0% of indicated value 5. Compression speed: According to the national standard, five compression speeds can be selected: 2mm/min, 5mm/min, 10mm/min, 20mm/min and 50mm/min. 6. Test pipe diameter range: (20～800) mm or customized according to customer requirements; 7. Single-phase power supply voltage: 220V±10%; 50HZ 8. Host weight: about 800kg; 9. Working environment: room temperature～30℃, relative humidity no more than 80%;