A refinery is a complex array of structural carbon steel, pressure vessels, piping, and other components that rely on welding. Experts perform various checks to find leakages in refinery using non destructive testing equipments. Because they know that even a minor problem may bring huge expenses and safety implications, they don’t take any risk and perform regular tests to find and fix faults in the refinery.
A normal welding repair technique helps engineers to weld a patch plate or sleeve onto refinery’s equipment that is still operating and under pressure.
Experts need to take good care of the refinery equipment in a repair situation. In the case of internal corrosion, while repairing it is important to find a line around the intense corroded section with wall thickness adequate for the welding process with safety. They usually do it with ultrasonic equipment.
Proper care is a must thing with pitting corrosion and in some of the erosion cases, as thinning can be casual, making a regular scan important.
The normal welding repair technique used by engineers for refineries is the process in which a patch plate is welded onto equipment that is under pressure and at operating mode. This welding process is alike the process used for hot tapping, in which a nozzle having a valve is welded onto the pipe and a hole is cut in the pipe by drilling through the valve.
Availability of Test Materials
Most of the refinery is built by manufacturers using carbon steel. But small yet significant amount steel alloys and other materials are involved in manufacturing of a refinery. When there is a requirement of repairing of these materials, it can be tough task to avail material samples and perform welding tests.
How Repeated Repairs Degrade the Quality of Materials?
It happens when weld repairs are repeated at the same area. Repeated thermal cycles may put bad impact on the properties of the materials. Also, storage tank floors may be replaced many times over the tank life, and the area where floor is welded to the shell encounters critical stress cycle. This happens to most high-temperature plants in which enhancements and repairs add a great number of thermal cycles, especially when the repairs are performed on stress-relieved alloy piping.
Engineers rely on non destructive testing equipments to perform tests for refineries. They even call professionals who have immense experience in testing refinery equipments using specialized tools and techniques. If you want to know more about NDT testing equipments, then contact EIE professionals. They are supplying whole range of testing equipments for soil, concrete, materials, asphalt, and other products.