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Our in-house Testing Facilities has the capability to conduct the following tests;
- Mechanical properties testing
• Hardness
• Tensile strength
• Charpy V-notch (Impact testing at 0 degrees Celsius)
• Bending strength
• Flattening strength of full size pipe;
- Metallographic examination of weld crystal structure
- Ultrasonic examination
- Pipe and strip-edge ultrasonic flaw detection
- Chemical Analysis using a Spectrograph
Specimen of parent metal and pipes containing welded seams are regularly sampled and tested. Our tensile tester is computer controlled, and provides us with real-time complete and concise test results and print outs. These are available for customers to view upon request.
In order to check the toughness of parent metals and welded specimens, impact tests at room temperature, zero and sub-zero temperatures can be carried out. Areas of Brittle and Ductile fractures can be examined.
Chemical Analysis is carried out to check if the steel material received is in accordance with steel mill test certificates before commencing of production. These are called validation analysis, which will draw immediate attention to any excessive amounts of carbon, phosphor and sulphur, which may affect welding and mechanical qualities of the pipe and weld seam in the production process.
Our automatic multiprobe ultrasonic flaw detection system monitors the weld integrity and measures the weld bead geometry after internal and external scarfing of each and every pipe manufactured.. Our mill therefore ensure the consistent quality of the weld seam giving you peace of mind in the knowledge that the most critical zone in the pipe is made to the highest quality standards possible. The welded seam and the adjacent heat affected zones are tested using 4 to 8 ultrasonic flaw probes. Flaws detected are automatically marked by spray guns. Further testing is carried out off line after hydrostatic testing, to ensure that no cracks have developed during the pressure testing process.
The hydrotester has the capability of pressure testing pipes to 95% of steel yield, to a maximum of 280 MPA. The process involves clamping pipes between two test heads and then filling the pipes with water and pressurising to the required specified test pressure.. The pressure is then applied and held for between 5 to 10 seconds, to ensure no leakages, cracks or sweats are detected.
The Capital Star Steel SA, Edge Lamination and Strip Width Ultrasonic Inspection system is employed in-line, in the manufacturing process. Our steel coil is constantly monitored for possible defects, using the latest equipment. We thus ensure consistent top quality of each and every steel pipe supplied to our clients in every project. Using the latest technology CSS employs an inline strip width UT inspection system to detect possible internal defects. We thus ensure constant top quality product supplied to our clients in each and every project.
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