Stress corrosion of erw pipe only in a specific environment can occur, it also has the following characteristics: (1) Only in the presence of stress (especially tensile stress) to produce stress corrosion cracking. This stress can be applied stress, or the residual stress introduced during presto lock fittings welding, as well as the expansion stress caused by the wedging effect of corrosion products. (2) Stress corrosion cracking is a time-dependent hysteresis failure that is completely similar to hydrogen hysteresis cracking. (3) Stress corrosion cracking is a kind of low stress brittle fracture.

Stress corrosion cracking is a common cause of failure of petrochemical equipment, especially for welded oil pipelines. Due to the unpredictability of stress corrosion cracking, it is the biggest hidden danger in the petrochemical industry. The necessary conditions for stress corrosion cracking are the coexistence of tensile stress and corrosion medium, and tensile stress is an important condition for stress corrosion. In petrochemical and nuclear plants, most of the stresses that cause stress corrosion cracking are caused by residual tensile stress, which is often superimposed on the working stress. Residual tensile stress mainly from the equipment in the welding process of residual tensile stress. At present, the engineering is widely used after welding cooling annealing treatment to eliminate residual stress, and cooling after welding is an important process of residual stress, this approach is a waste of energy and easy to produce greater welding residual stress. Heat treatment after welding is a new technique to eliminate residual stress. The material is preheated to a post-heat treatment temperature prior to welding and the weldment is continuously heated to maintain this temperature during the welding process. After the welding is completed, the material is soaked with insulation wool to allow it to cool slowly. This method can effectively reduce the welding residual stress and improve the metal's stress corrosion resistance.

After welding, heat treatment can effectively reduce welding residual stress, and the higher the heat treatment temperature, the better the residual stress elimination effect. Post-weld heat treatment can also effectively improve the resistance to stress corrosion resistance of erw pipe, post-heat treatment temperature is higher, the more significant increase in anti-stress corrosion resistance

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Proper insulation of your plumbing pipes offers many great benefits beyond keeping them from freezing. Investing in insulated heating pipes can impact your home or building's safety and efficiency in a positive way. No one wants frozen pipes every time the cold weather sets in. When pipes freeze, the water in them turns to ice and expands which can cause great damage to your plumbing system. Non-insulated pipes burst and break under extreme pressure, which can likely cause extensive and expensive damage that could otherwise be prevented with proper insulation. Insulated heating pipes not only keeps your  full body rope harness plumbing system from freezing, but they also help you save a great deal of money (and worry) on utility bills and system upkeep. The following are only some of the most unsung benefits of using insulated heating pipes in your home/building:

Insulated pipes help minimize heat gain and loss. When water travels through your non-insulated plumbing lines, hot water tends to lose heat, while cold water tends to gain heat. However, proper pipe insulation greatly diminishes these inefficiencies and helps you reap real benefits like reduced monthly energy bills from preventing long waits for hot water to reach your kitchen and bathroom fixtures.

Plumbing insulation also helps control condensation. When plumbing pipe surfaces are a lot cooler than the surrounding air, insulation can help control condensation, which if left unchecked, could potentially corrode pipes and fittings. This may eventually lead to a massive failure in your plumbing system. Uncontrolled condensation may seem like a minor, remote concern, but it is not uncommon and is often the cause piping failures.

The only time when pipe insulation would be counter intuitive would be in radiant heating/cooling loops, where it may actively work against the system design. Otherwise, using insulated heating pipes offers extreme benefits in terms of energy savings, safety, and peace of mind. While insulated plumbing may cost more initially, the long-term benefits far outweigh the additional price you will have to pay for these kinds of installations.

To make sure that you are getting all the benefits and the best value for your insulated piping investment, make it a point to find a supplier or contractor that you can trust. While installing insulated pipes isn't an extremely complex task to tackle, hiring help might help you save a great deal of time and cost, as you eliminate guess work and speed up the process.

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The PVC Pipe is not only efficient in plumbing and water piping

Polyvinyl Chloride Pipe or PVC is considered an excellent material for making pipes and fittings. PVC Pipe is used everywhere, right from the plumbing systems installed in homes to mega construction projects. Iron and copper pipes have been overshadowed by PVC pipes because these pipes were found to be more expensive and less durable. More than half of the multi-functional pipes used in various industries are made of PVC. The major benefit of using PVC is its resistance to chemicals, acids and corrosion. PVC maintains the quality of water and also provides great connection between pipes. It is utilized in a variety China Push In Fittings Manufacturers  of applications in different sectors. Some of its uses are mentioned below:

The PVC Pipe is not only efficient in plumbing and water piping but also natural Gas piping. The growing popularity of this pipe is fostered by its key attributes like durability and safety. Its shockproof qualities have made it a commonly used material in electrical systems.

PVC Pipe is used in telecommunications, engineering, brewing and fermentation industry because of its self-extinguishing property. PVC material can be used in temperature conditions ranging from -15 to 60°C. It does not burn easily so it also proves to be a safe choice.

PVCs high chemical resistance facilitates its use in swimming pools, water facilities projects, building drainage and chemical companies. PVC Pipe is an excellent product for industrial applications as it does not react with large number of chemicals.

PVC Pipe is largely used in sewage system because of its smooth interior surface. Its smooth surface does not allow anything to stick to the walls of the pipe thus, reducing the chances of clogging.

PVC Pipe is perfect for underground applications as the flexibility and strength of these pipes make them resistant to breaking under pressure. Its high mechanical strength helps it to endure high pressure and impact strength. The cost effective PVC is available in a variety of colors.

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