YLE GmbH develops test systems to client developed test methods and custom test systems for product qualification.

Examples of custom test systems developed to client requirements:

ELH: Elastic Limit Hoop for Composite Pipes

ELH is a proprietary test method for determination of circumferential (hoop) elastic limit of composite and fiberglass (FRP, GRP and GRE) pipes under pressure. Test method developed by FPI B.V. This method is based on stepwise cyclic pressurizing of pipe specimens while monitoring wall strain within cyclic pressurizing steps and between pressurizing steps.

Based on client test requirements an integrated system consisting of a cyclic hydrostatic pressurizing system and data acquisition system for pressure and strain measurement was developed with software for control, monitoring analyzing and reporting test results.

ELA: Elastic Limit Axial for Composite Pipes

ELA is a proprietary test method for determination of axial elastic limit of composite pipes under load. Test method developed by FPI B.V. This method is based on stepwise axial cyclic loading of longitudinal strip of composite pipe and monitoring axial strain within cyclic loading steps and between loading steps.

This test is undertaken on the YL25 UTM in conjunction with extensometer. A software module for monitoring analyzing and reporting test results in accordance with client specifications.

CVT: Cyclic Hydrostatic Qualification of Composite Pressure Vessels

CVT test system was developed for pressure qualification of GRV of 30m3 composite vessels in accordance with section X of ASME Boiler and Pressure Vessel Code.

The test consists of cyclic pressurizing between 1 and 6 bars for 10,000 cycles with pressurizing media being water at ambient temperature. This is followed by 80,000 cycles between 1 and 6 bars with pressurizing media, water at 66°C, followed by a final 10,000 cycles during which the vessel is thermally shocked by flushing 27°C or less water so that the vessel reaches at least 32°C at the completion of the 10,000 cycles. After completion of the 100,000 cycles, the vessel is burst tested.

The CVT consisted of a high capacity cyclic hydrostatic pressurizing system with software for control, monitoring analyzing and reporting test results.