On the one hand, we will vigorously improve the working mechanism for rectifying environmental problems. Under the unified coordination of the District Action Group for the Remediation of Environmental Issues, the departments and towns (towns) shall be instructed to establish corresponding organizations, clarify their supervisory responsibilities, and form a joint effort for rectification; focus on the special action, and implement the typical cases of serious violations. Supervise the listing; give full play to the role of social supervision, publicize the list of illegal sewage companies, investigate and deal with cases of typical environmental violations, and mobilize the masses to actively participate in reporting illegal discharges. On the other hand, focus on the hot spots and difficult issues in the concentration of complaints from the people, and increase the efforts to rectify various types of illegal sewage companies. Focus on the inspection of drinking water sources and enterprises around the water intake, chemical, electroplating, printing and dyeing, pharmaceutical companies and hazardous waste disposal units, etc., timely propose industrial adjustment or deadline management plans for enterprises with hidden environmental pollution, strengthen tracking and supervision; The docks for loading and unloading garbage, oil and other toxic and hazardous materials in the upstream area shall be thoroughly cleaned up, and a number of environmental illegal acts of abnormal operation of wastewater treatment facilities and excessive discharge of wastewater shall be investigated and dealt with; efforts shall be made to combat heavy polluting enterprises in the “two high and one low†industries. Environmental violations, centrally investigate and deal with enterprises that do not meet industrial policies and access conditions, and start work without approval.
DUPLEX STAINLESS STEEL
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:
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
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.
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
Duplex Steel Flange,Duplex Stainless Steel Flange,Super Duplex Steel Flange
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