Projects Studies

The service life of metal water tanks is often determined not by corrosion or pressure vessel failure, but by fatigue cracks at rigid support connections. High-frequency vibrations caused by pumps and cyclic thermal expansion generate repeated stresses that concentrate at weld roots and areas of sudden cross-sectional change. In a documented case involving a water storage tank installation, cracks up to 4 millimeters deep were discovered in the welded mounting brackets after only three years of use. Metallographic examination traced the failure mechanism to strain-induced corrosion cracking, caused by the welded brackets acting as local restraints that impeded the natural deformation of the relatively thin and highly elastic metal water tank walls. This local constraint caused stress concentrations in the joint area to exceed the strain tolerance of the protective coating, leading to corrosion propagation into the base metal and the formation of deeper cracks. Addressing this failure mode in metal water storage tanks requires a two-pronged approach: decoupling vibration

For metal water tanks, microbial-induced corrosion (MIC) is a threat to structural integrity that is often significantly underestimated. Unlike traditional corrosion driven by electrochemical potential differences, MIC stems from the colonization and metabolic activity of microorganisms on metal surfaces. Bacteria form biofilms by secreting extracellular polymers, creating a microenvironment on the inner walls of metal water tanks that differs significantly from the main water body in terms of pH, dissolved oxygen, and chemical species. This microenvironment leads to localized electrochemical potential differences, which in turn induce severe pitting corrosion; the perforation rate can reach significant levels within a matter of weeks or even days. MIC can occur in various materials commonly used for water tanks, such as carbon steel, austenitic stainless steel, and aluminum alloys, and tends to develop preferentially in areas with microstructural inhomogeneities, such as welds and heat-affected zones. More critically, stagnant water conditions provide an ideal breeding ground for bacterial proliferation—water left standing in a tank that

In industrial manufacturing environments, splash guards serve as a critical barrier, protecting sensitive mechanical components from corrosion caused by cutting fluids, lubricants, and coolants. When leaks occur at the corners or edges of joints, the liquid that accumulates on the shop floor not only creates a slip hazard but also poses a risk of violating workplace safety regulations. The root causes of such failures in custom splash guards can typically be attributed to three interrelated factors: intermittent spot welding patterns that result in unfused gaps between discrete weld spots; insufficient penetration depth, which prevents complete fusion of the joint; and a lack of secondary sealing measures at the lap joint interface. Although industry standards such as AWS D9.1 clearly specify process and inspection criteria for non-structural sheet metal products, many manufacturers still rely solely on spot welding when manufacturing splash guard assemblies, failing to address the inherent leakage pathways. At Supro MFG, we view the integrity of splash guard welds

EMI shielding cans—also known as radio frequency (RF) shielding cans or board-level shielding cans—are metal enclosures mounted over sensitive components or sections of a circuit to block EMI/RFI radiation and prevent external interference. In a wide range of applications, from wireless communications and medical devices to automotive electronics, these components are essential for achieving electromagnetic compatibility (EMC) compliance. However, a problem arises when implementing EMI shielding cans: the shielding, which is intended to protect the circuit, can under certain conditions actually become the root cause of catastrophic hardware failure. When the inner top surface of an EMI shielding can comes into contact with exposed pins or active components on a printed circuit board (PCB), it causes a direct short circuit—which typically results in permanent damage to the board and its components. From the perspective of precision metal fabrication, this failure mode in EMI shielding cans is entirely preventable. Its root causes—insufficient Z-axis height clearance, thermal deformation under operating conditions, and

Nowadays, outdoor electricity scenes are becoming more and more abundant, whether it is the lighting and power supply in residential courtyard, the use of electrical appliances in outdoor terrace, or the temporary power supply in construction site, the connection of electric equipment in commercial plaza, all of them will use outlet box, however, the ordinary outlet box in the open-air environment is susceptible to the rain, dust, high and low temperatures, and other environmental factors, not only may lead to a short-circuit, leakage and other safety hazards, but also shorten the service life of equipment. However, ordinary outlet boxes are easily attacked by rain, dust, high and low temperature and other environmental factors in the open environment, which may not only cause short-circuit, leakage and other security risks, but also shorten the service life of the equipment. Therefore, weatherproof electrical outlet box is very important in this kind of scene. It is a kind of electrical protection outlet box specially

PCB-level EMI/RFI shielding cans are critical components for protecting sensitive electronic circuits from electromagnetic and radio frequency interference. As PCB areas continue to shrink and component density continues to increase, the dimensional accuracy of these stamped enclosures has become a key factor determining SMT assembly yield and overall product reliability. The core challenge in stamping EMI/RFI shielding cans lies not in the forming process itself, but in managing the physical phenomena that affect geometric accuracy over millions of production cycles. Springback—the elastic recovery of metal after deformation—causes finished part dimensions to deviate from the die geometry. Wear on the edges of progressive dies leads to cumulative drift. Variations in material properties between different coil batches further exacerbate the challenges of process stability. This article provides an in-depth analysis of the root causes of dimensional deviations beyond tolerance limits during the stamping of EMI/RFI shielding cans and outlines the engineering control measures required to achieve a process capability (CPK) greater than

As the key equipment for emergency power supply and outdoor operation, generator is widely used in engineering construction, wild camping and other scenes, but the noise generated by its operation will seriously disturb the surrounding environment. Therefore, generator soundproof box is very important. The article will focus on generator soundproof box to start a detailed analysis, first from the core definition, then analyze its main features and the errors that should be avoided in the process of customization, and finally list the common application scenarios to help you fully understand the generator soundproof box. What is generator soundproof box? generator soundproof box is an enclosed or semi-enclosed box specially designed to reduce the noise generated by the generator during operation, which is a comprehensive equipment solution that combines the functions of soundproofing, noise reduction, ventilation and heat dissipation, dustproof and rainproof, etc. Its core purpose is to ensure the safety of the generator. Its core purpose is to ensure the

In industrial electrical wiring systems, building circuit installations and other scenarios, the terminal box is an important part of protecting electrical connections and ensuring the safety and reliability of electrical installations. In this article, we will analyze the various aspects of terminal boxes, starting with a basic definition, then identifying their main functions and common materials, and finally analyzing how to choose the right terminal box. This article is designed to help you get a comprehensive understanding of the basics of the electrical terminal box and to make scientific and informed decisions on your projects! What is a terminal box? The electrical terminal box is an important part of the electrical wiring and is a specialized box used to contain and protect electrical connections. It is one of the most basic and common components in electrical engineering, and is widely used in industry, construction, infrastructure, and a variety of household equipment. terminal box can provide protection for the electrical connections

In industrial electronics, outdoor equipment installation and other scenarios, the electrical box is an important component to ensure the stable operation of the internal components of the equipment, and the IP protection level is the core criterion for judging its protection performance. IP54 box and IP65 box are the two most widely used types of electrical boxes, both of which can provide reasonable dustproof and waterproof protection for the internal components, but there are significant differences in their protection strengths and applicable scenarios. Improper selection may lead to accumulation of dust or infiltration of liquids, which may cause short-circuiting or damages to the electronic components, resulting in losses to the production and use. The article will analyze IP54 box and IP65 box in detail, firstly to clarify the basic definition of the two, then to analyze the similarities between the two in terms of protection principle and basic functions, as well as the core differences in dustproof and waterproof capabilities,