Differences in Ultrasonic Testing Methods for Castings and Forgings

2022-05-26

Due to the differences in manufacturing processes between castings and forgings, the internal microstructures of these two types of workpieces differ significantly, resulting in markedly different inspection methods. Forgings are produced by applying an external compressive force to metal, causing plastic deformation to achieve the desired shape. This external force is typically applied using a hammer or a press. The forging process also refines the grain structure within the material and enhances its mechanical properties; key advantages of forgings include their ability to elongate along the longitudinal axis while reducing in cross-sectional area.

Advantages and Application Prospects of Phased-Array Ultrasonic Testing

2022-05-19

Ultrasonic phased arrays have garnered increasing attention due to their flexible beamforming capabilities and rapid imaging performance, making them a burgeoning research focus in the field of ultrasonic nondestructive testing. The concept of phased arrays originated in radar antenna electromagnetic wave technology, and ultrasonic phased arrays were initially used exclusively in the medical domain. In recent years, with the rapid advancement of new technologies such as microelectronics and computing, ultrasonic phased arrays have gradually been adopted in industrial nondestructive testing. By enabling the orderly superposition of acoustic beams emitted by individual array elements, ultrasonic phased arrays can flexibly generate steered and focused beams, without

Weicheng Testing’s 2022 Annual Emergency Response Drill for Radioactive Source Accidents

2022-05-10

Nuclear Accidents Stem from Complacency in Nuclear Safety: WeiCheng Testing Conducts 2022 Radiological Source Accident Emergency Drill To further enhance our employees’ understanding of radiological sources and their ability to respond quickly and appropriately, handle emergencies effectively, and coordinate operations when a radiological source accident occurs; to test and improve the collaborative capabilities of command personnel; to clarify the division of responsibilities among departments; and to elevate our company’s emergency response and rescue capabilities—ensuring that, in the event of an emergency, we can carry out swift and efficient emergency management, minimize the impact of any incident, and verify the scientific soundness, practicality, and operability of our radiological source emergency plan—thereby truly safeguarding the safe use of radioactive sources, we have organized this radiological source accident emergency drill in accordance with Luoyang WeiCheng’s annual emergency drill schedule for the year. On April 25, the company held the 2022 Radiological Source Accident Emergency Drill at the factory premises. The drill was chaired by Liu Feifei, head of the company’s Engineering Department, and all employees were present to observe the exercise. At 4:50 p.m., all staff arrived punctually at the designated area within the factory and attentively listened to Manager Liu Feifei’s briefing on radiological sources and the procedures for handling radiological source emergencies. Manager Liu provided on-site explanations, demonstrations, and emergency response protocols for every type of radiological source incident that could occur during work. Under the professional guidance of the on-site team, the entire operation proceeded in an orderly and well-organized manner. Radiological Source Detachment—The emergency response team dons protective suits and covers the source with lead shielding; based on the alarm threshold settings, they determine the source’s location. Radiological Source Detachment—The emergency response team is equipped with dosimeters, wears protective gear, and employs three protective measures—time, distance, and shielding—to minimize individual radiation exposure as much as possible, using lead shields to block the exposure tube. Radiological Source Detachment—The emergency response team is equipped with dosimeters, wears protective gear, and uses long-handled pliers to grasp the drive wire. Radiological Source Detachment—The emergency response team is equipped with dosimeters, wears protective gear, and swiftly places the detached radiological source into the storage container. Radiological Source Detachment—The radiation technology team uses a radiation survey meter to monitor the dose levels inside the storage container, confirming that the radiological source has been safely retrieved. Damage to the Source Guide Tube—During operations, improper placement of the source guide tube by workers can result in external impact, causing the tube to fracture or collapse and preventing the radiological source from being promptly retracted into the source machine. Damage to the Source Guide Tube—Emergency responders must wear protective equipment, carry radiation detectors, and use lead shields or lead bags to shield the exposure tube (at this point, the radiological source remains in the exposure tube). Damage to the Source Guide Tube—A plastic sheet is laid flat on the ground, and a grinding wheel is used to cut off both ends of the deformed section of the guide tube. First, the drive wire is retracted, the quick-connect fitting and the screws above the connecting claw are removed, and the radiological source machine is placed on the plastic sheet. Damage to the Source Guide Tube—Using pliers, the drive wire inside the source delivery tube is grasped and fed into the storage container. Damage to the Source Guide Tube—On-site dose measurements are taken and recorded, concluding the emergency response. At each step, the team handled the situation correctly, and the other employees participating in the drill watched intently. Manager Liu’s insightful explanations and the operators’ professional execution created a vivid, immersive experience. Manager Liu patiently explained the basic knowledge about radiological sources and the precautions that must be observed during routine operations. As the drill was drawing to a close, participants took advantage of the final moments to share real-world radiological source emergencies they had encountered or might encounter in the future with their colleagues, jointly analyzing the causes, discussing remedial measures, learning from one another, and striving for continuous improvement. The various emergency scenarios encountered during this drill closely mirror the real-life situations we may face in our daily work; however, no one adopted a passive or perfunctory attitude simply because it was an exercise. Everyone approached the drill with utmost seriousness. The focus of the drill was to ensure that everyone knows how to respond correctly when an accident occurs, with particular emphasis on the key steps: evacuation—reporting—establishing a perimeter—response—and ensuring that the site is thoroughly cleaned after the response to prevent debris from falling onto the radiological source and complicating subsequent handling. In safety work, it is better to be prepared and not need it than to need it and not be prepared. With this, the 2022 Radiological Source Accident Emergency Drill of Luoyang WeiCheng Engineering Testing Co., Ltd. has come to a successful conclusion.

Our company is delighted to have been awarded the “Caring Enterprise” honorary title.

2022-05-07

On May 6, 2022, our company was honored with the title of “Caring Enterprise” by the Party Working Committee of Heyang Subdistrict. Since the onset of the pandemic, our company has proactively participated in and supported all epidemic prevention and control measures, as well as initiatives to build a civilized city. As a locally grown enterprise, we have always regarded it as our inescapable social responsibility and duty to give back to society. The receipt of this honor serves both as encouragement and as a call to greater accountability; moving forward, we will continue to lead by example, remain steadfast in our convictions, take deep root in this vibrant region, and fulfill our social responsibilities.

Weld Quality Inspection of Tower Crane Lattice Columns

2022-04-27

With social development and the continuous improvement of construction technology, ultra-high-rise buildings and multi-level underground structures—which enable more efficient utilization of land resources—have become the primary direction of development. Tower cranes, as indispensable vertical transportation equipment in construction, play a crucial role in enhancing the efficiency of excavation support and basement construction. As the supporting strut system for tower crane foundations, the quality of lattice columns is of paramount importance. Lattice columns typically have cross-sections designed from angle steel or steel plates, configured as either bi-axially symmetric or uniaxially symmetric sections. The structural members of a lattice column system consist of web members and bracing elements; the web members primarily resist axial forces, while the bracing elements mainly counteract lateral forces. According to the lattice

Nondestructive Testing of Storage Tanks

2022-04-21

Storage tanks are the vessels used to store petroleum products and constitute one of the core facilities in the storage and transportation system of oil depots. For a long time, many in-service storage tanks in China have exhibited defects such as cracks and corrosion to varying degrees. Coupled with inadequate management during operation, this has led to frequent safety incidents, resulting in equipment damage and even casualties. Therefore, nondestructive testing of in-service storage tanks is of great significance. Currently, abroad, acoustic emission technology is primarily employed for online detection of active defects on the shell plates of atmospheric storage tanks and of corrosion and leakage signals on the tank bottom plates; magnetic flux leakage methods are used for periodic inspection of corrosion and leakage on the tank bottom plates; and ultrasonic techniques are utilized...

Classification, Functions, and Selection of Ultrasonic Testing Probes

2022-04-14

With the continuous emergence of new technologies and the ongoing upgrading of inspection equipment, ultrasonic testing has become one of the fastest-growing and most widely applied nondestructive testing methods, occupying a critically important position within the field. During the inspection process, in addition to the ultrasonic testing instrument itself, the transducer—responsible for both transmitting and receiving ultrasonic waves—plays an equally vital role. Consequently, the performance of the transducer and the appropriateness of its selection during flaw detection directly affect the accuracy and reliability of the inspection results. The following section will focus on the classification, functions, and selection criteria for piezoelectric ultrasonic transducers.

Tundish Trunnion Defects and Nondestructive Testing

2022-04-08

The ladle is a critical vessel in the metallurgical industry, primarily used in steelmaking and foundry shops to receive molten steel at the furnace front and to carry out refining and treatment of molten steel and hot metal. Among its components, the ladle trunnion plays an indispensable role: it must support the entire weight of the ladle and, in certain applications, also withstand the forces generated by gentle tilting of the ladle. Moreover, the trunnion is in constant friction with the hook lining, making it prone to scratching and the development of cracking defects. As a key load-bearing component of the vessel, the trunnion is vital for the safe operation of the ladle and directly affects the overall safety of the equipment. If defects in the trunnion are not detected in a timely manner, they can lead to serious accidents.

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Address: Room 104, Building 9, Futong Intelligent Manufacturing Industrial Park, Jinye 1st Road, Yiyang County, Luoyang City, Henan Province

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Website:www.lywcjc.cn

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