MACHINERY | PIPE INSPECTION
accurate results and fewer mechanical parts to maintain, says Sciteq. On impact, the striker is immediately lifted by the vacuum system, ensuring no double bouncing. The system auto-calibrates at start-up for a
reliable, repeatable performance. To prove each test, the impact speed monitoring system provides all the information needed, including the speed of the striker. The device is equipped with a range of safety
features that prevent a release of the impact weight unless the doors are closed. When performing round-the-clock repeat tests, the striker weight can be locked in its safety position in the top of the tube, allowing the operator to turn the sample easily, before repeating the test.
Above: Sciteq’s Sigma impact tester is intended for use in production environments
repaired and returned it the next day. “The customer was able to resume production, thus doing their part to help with the pandemic crisis,” said NDC.
Sudden impact Sciteq of Denmark has developed its Sigma impact tester specifically for plastic pipe producers. The test unit is intended for use in a production environ- ment, with an emphasis on ease and speed of use, low maintenance and safety, says the company. The design allows for safe staircase and round- the-clock tests of pipe diameters from 20mm up to 2000mm complying with ISO 3127, EN 744, EN 1411 and ASTM D 2444 and equivalent, it says. Being equipped with a closed vacuum loop enables fast repeat of tests as well as safe, precise adjustment. The system has built-in impact speed measurement to prove the falling velocity of each test. Weights can be exchanged in seconds and all parameters are easily selected via the control panel. Its Sigma software is intuitive and easy to use, while making sure the testing is done correct and according to the different standards. The unit is controlled via a user-friendly interface run from any browser-enabled device (such as a laptop or smartphone). There are four different user levels, enabling the main operator to pre-program test recipes for all users. Drop height, impact quantity and drop weight are entered in the recipe before use. It combines accurate measurement of drop speed with a resolution in microseconds and automatic calculation of H50 and TIR. A test sample is placed on the V-block, the chamber is closed and the test is initiated from the Sigma UI. Inside the falling tube, the striker is lifted into place by the vacuum system. The frictionless environment inside the falling tube ensures
14 PIPE & PROFILE EXTRUSION | October 2020
Leak trial US-based Electro Scan has completed a trial project of its leak-detection technology with Australian water utility Sydney Water. Traditionally, water utilities have relied on high
resolution cameras and visual inspection to assess defects manually inside sewer pipes that have low or restricted flows. Pressure tests of existing and new pipe installations are also common but, when located in close proximity to shorelines, may falsely measure water tightness based on groundwater conditions. The company used its Focused Electrode Leak
Location (Fell) technology to evaluate sewer mains of 150-400mm diameter, in materials including plastic, clay, cured-in-place lined pipe (CIPP) and Rib-Loc spiral wound lined pipes. “We will use the findings to see if we can
improve the way we test our new and rehabilitated pipelines and prioritise our repair strategies for existing wastewater pipelines,” said Jerry Sunarho, senior engineer at Sydney Water, who coordinated the trial.
Similar to the testing used to evaluate protective
coatings for defects and pinholes, Electro Scan uses a low voltage, high frequency current to create an electric circuit between the inside of the pipe and its surface. If a pipe has a leak – such as from a crack in the wall or at a joint, junction – the circuit is temporarily completed and a measurable leak size and location is automatically recorded. Defect locations, including pinhole leaks in trench-
less rehabilitation materials are located to within 1cm, and estimated in litres/sec or gallons/min.
High precision Zumbach says that its GaugePro offers a fast, precise way to measure and record tubular
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