1. General requirements
(1) The design of the acetylene station (house) should meet the requirements.
(2) Establish a sound safety management rules and regulations: the outbound and inbound (house) must be registered, hand over the fire, and wear must comply with the regulations; strictly implement the inspection system, and the records are complete and reliable.
(3) Various corresponding safety technical data files should be established.
2. Piping system
1 Pipes and valves should be rigorous and reliable. A component that has been in contact with acetylene for a long period of time, and whose material contains copper alloy of not more than 70%.
2 Pipes should have good measures for the discharge of static electricity, and should have regular test records.
3 The piping system must be properly equipped with a tempering preventer and ensure reliable and effective.
3. calcium carbide warehouse and crushing system
1 The warehouse should comply with the regulations, be well ventilated, keep dry, and prohibit water, rain and moisture.
2 The calcium carbide barrel should be kept tight and the air should not be in contact with the calcium carbide in the barrel for a long time.
3 When manpower crushing calcium carbide, labor protective equipment should be worn; when mechanically crushing calcium carbide, dust removal device should be used, and powdered calcium carbide should be removed in time, and treated by calcium carbide water in accordance with regulations.
4 When setting up the middle calcium carbide warehouse and the crushing room, measures should be taken to prevent moisture.
4. Security measures
1 Before the acetylene generation system is overhauled, it must be completely replaced with an inert medium. After the sampling test is qualified, it can be repaired.
2 The low-pressure acetylene generator balancing valve should be in good condition, markedly marked and protected against misoperation.
3 The buoyant gas cabinet should have an alarm device interlocked with the limit position, and the sprinkler device should be set according to the environmental conditions.
The electrical appliances and instruments (tables) in the 4 station rooms must meet the explosion-proof requirements.
5 Safety devices should be sensitive, reliable, in good condition, and regularly inspected, inspected and recorded according to regulations.
6 lightning protection measures should meet the requirements.
5. Fire protection facilities
1 Reasonably equipped with fire-fighting equipment, with eye-catching signs.
2 The fire exit is unobstructed, preferably in a circular arrangement.
3 It is strictly forbidden to use water and foam fire extinguishers to save the fire of the calcium carbide. It is strictly forbidden to enter the station (house) with halogenated substances such as carbon tetrachloride.
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 ZeronÂ® 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
In what Applications are Duplex Stainless SteelsÂ® used ?
Oil and gas equipment
Seawater desalination plants
Chemical industry, especially when handling chlorides
Desalination plants and seawater systems
Pulp and paper industry
Cargo tanks and pipe systems in chemical tankers
Firewalls and blast walls on offshore platforms
Pressure vessels, reactor tanks, and heat exchangers
Rotors, impellers and shafts
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