Nondestructive testing

Non destructive testing refers to the method of inspecting and testing the structure, properties, and state of the interior and surface of a test piece using physical or chemical methods, techniques, and equipment without damaging the test piece. Non destructive testing techniques and methods include: radiation, ultrasound, magnetic powder, penetration, eddy current, magnetic flux leakage, acoustic emission, phased array, guided wave, infrared, etc.

● Application of non-destructive testing technology:

The application of nondestructive testing technology runs through all aspects of equipment integrated management, and its application objects include: steel rolling, smelting equipment, lifting machinery, power plant equipment, special equipment, building steel structures, high-strength bolts, and other equipment

● The details are as follows:

♦ Steel rolling equipment: rack, roller table, transmission shaft, roller (new product, in service, modified)

♦ Smelting equipment: blast furnace, hot blast furnace, gravity dust removal device, ladle, rotary table, etc

♦ Lifting machinery: crane, lifting appliance, steel wire rope, drum, port machinery

♦ Power plant equipment: fan bolts, rotors, bearing pads, steam turbine components

♦ Special equipment: pressure vessels, pressure pipelines

♦ Building steel structure: construction and installation welds of steel beams and columns

♦ High strength bolts: high-strength bolts for steel structures

♦ Others: UOE molds, various shaft heads, gears, motor vehicle assemblies, roller rings

● Non destructive testing items include:

Penetrant testing, magnetic particle testing, ultrasonic testing, etc., such as:

Steel rolling equipment: frame, roller table, transmission shaft;

Smelting equipment: blast furnace, hot blast furnace, gravity dust removal device;

Lifting machinery: cranes, lifting appliances, drums, port machinery;

Power plant equipment: fan bolts, rotors, bearing pads, and steam turbine components;

Special equipment: pressure vessels, pressure pipelines;

Building steel structure: construction and installation welds of steel beams and columns;

High strength bolts: high-strength bolts for steel structures;

Others: various shaft heads, gears, motor vehicle assemblies, roller rings.

● The role of non-destructive testing technology:

The nondestructive testing profession plays an irreplaceable role in the detection, tracking, and evaluation of defects in rolls, mill frames, and key components of the main shaft, steel structures and lifting fixtures of lifting machinery, large castings, forgings, and closed structures. Through non-destructive testing, product quality control, manufacturing process improvement, equipment safety hazards detection and predictive maintenance are realized, and good economic benefits can be created for customers.

● The following are typical technical applications for non-destructive testing:

Acceptance inspection of UOE -- O machine mould and C machine casting	On line inspection of safety coupling of heavy plate and medium plate, cooperate with the implementation of predictive maintenance and technical claim
Tracking inspection of CVC tie rod of heavy plate mill -- crack defect tracking without dismantling structure	Rapid detection of inner defects of truck hub with phased array

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