Duplex Stainless Steels Available
Yuhong Group supplies LDX2101, 2205, Ferralium 255, Zeron 100 and LDX2507 in the form of plate, sheet, strip, bar, pipe, tubing, pipe fittings, flanges and weld wire.
Duplex Stainless Steel Overview
Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. These steels have a duplex microstructure which contributes to their high strength and high resistance to stress corrosion cracking. Due to their high content of chromium, nitrogen and molybdenum, duplex steels offer good resistance to local and uniform corrosion. Duplex stainless steels have good weldability.
Today, modern duplex stainless steels can be divided into three groups:
Of the duplex grades, duplex 2205 is the most widely used. However, the super duplex steels like Zeron® 100 and LDX2507 are excellent for servicing severe corrosive environments, such as offshore and marine applications. Lean duplex 2101 is available as an economic alternative to 300 series stainless steels.
Duplex Steel Seamless Tube,Duplex Stainless Steel Tube,Duplex 202 Seamless Steel Tube YUHONG GROUP CO.,LIMITED , https://www.alloypipeline.com
At this point, the best method is the PoE power supply method, which is different from the common way of taking power from the wires, but it is powered by the network cable. Someone wonders: If the network cable is not transmitting network data, can it also transmit electricity? This will talk about this PoE technology.
PoE translated into Chinese is Power over Ethernet, which means that through the cable system power supply, through the cable can be transmitted to the power needs of the device, and no longer need the traditional way of power supply.
As we all know, network monitoring is a monitoring system based on the network. It is natural to use network cables to transmit video data. At this time, the same cable can transmit data and transmit power. Is it convenient? No longer worry about powering the surveillance camera.
Let's talk about PoE switches. It is a type of switch. It differs from common switches. Ordinary switches only transmit data. PoE switches can transmit and transmit power. Slightly larger-scale monitoring systems generally use switches. We only need to replace PoE switches with ordinary ones.
The voltage supplied by the PoE switch is generally 44 to 57 VDC, typically 48V, and 52V. But also to follow the power supply standard, there are two kinds of af and at, the former allows to provide 15.4W of power, the latter allows the provision of 30W of power, the choice of what standard PoE switch to be determined based on the power of the camera.
And there are still some non-standard PoE switches. Feng Runda, a leading brand of professional PoE switches, reminds everyone to try not to use them. Otherwise, you may be able to burn out some of your equipment that needs to be powered. You must use standards.
Remember, not all surveillance cameras can be powered by PoE switches, but those that support PoE power. Otherwise, add other devices. Here is the monitoring system application collocation mode:
PoE switch ----- PoE camera PoE switch ------PoE separator ----- ordinary camera ordinary camera ------ PoE power supply ----- PoE camera ordinary camera --- ---PoE power supply ------PoE separator ------common camera Of course, everything has two aspects, although PoE switch to the surveillance camera power supply comparison, but the construction is more flexible, but there are A bad place is that the distance of power supply cannot exceed 100 meters.
The above is not to say that PoE power supply is powered by a network cable, that is to say the distance between the surveillance camera and the PoE switch cannot exceed 100 meters, otherwise it will cause video data transmission problems.
DUPLEX STAINLESS STEEL
Lean Duplex such as LDX2101
Standard Duplex such as 2205, the work-horse grade accounting for more than 80% of duplex usage
Super Duplex such as Ferralium 255 and Zeron 100 and LDX2507
What are the Characteristics of Duplex Stainless Steels ?
Very good resistance to uniform corrosion
Very good resistance to pitting and crevice corrosion
High resistance to stress corrosion cracking and corrosion fatigue
High mechanical strength
Good sulfide stress corrosion resistance
Good abrasion and erosion resistance
Good fatigue resistance high energy absorption
Low thermal expansion
Good weldability
In what Applications are Duplex Stainless Steels® used ?
Oil and gas equipment
Offshore technology
Seawater desalination plants
Chemical industry, especially when handling chlorides
Flue-gas cleaning
Desalination plants and seawater systems
Pulp and paper industry
Cargo tanks and pipe systems in chemical tankers
Firewalls and blast walls on offshore platforms
Bridges
Storage tanks
Pressure vessels, reactor tanks, and heat exchangers
Rotors, impellers and shafts
Do you really understand the knowledge about PoE switches?
With the continuous development of the city, and the construction of “Safe City†and “Smart City†projects, the number of network monitoring systems has increased dramatically. In order to allow these large number of surveillance cameras to work properly, it must provide 24 hours of uninterrupted power supply. . There is no problem in the comparison of the power supply of the mains, and it is sufficient to connect the outlet. However, where no wire is available, this place happens to be the best installation point for the surveillance camera. What should I do?