In the Blue Star Shenhua Group's Catalytic Thermal Cracking Project (CPP), Ningbo Engineering Co., Ltd., as the general institute, implemented the overall design of this project, and also undertook two EPCs of 100,000 tons/year of polyethylene equipment and a whole plant tank project. General contracting projects, engineering design for 50,000 tons/year gasoline refining, C4 liquefied petroleum gas product refining, gas separation reformation of 80,000 tons/year expansion to 120,000 tons/year, and other engineering installations and utilities and supporting facilities. It is understood that the two EPC general contracting projects for this project, as well as the plant-central laboratory and the desulfurization spent lye pretreatment facility in public works and ancillary facilities are implemented at Ningbo headquarters, and the rest of the design tasks are implemented in Lanzhou.
In order to do a good job of all the work of the project, the company's director of the plumbing, environmental protection, electrical, civil engineering, and equipment specialties of the headquarters of the company made a special trip to Lanzhou to coordinate the work and clearly identified the executives of the project in Lanzhou. The chief persons in charge of the three process installations and public works facilities put forward specific requirements for the project schedule and work arrangement; at the same time, they also carried out technical business training for the professional designers in Lanzhou based on the basic business development situation of Ningbo headquarters. In the professional room, the template documents, standard texts, and technical regulations that were completed in the headquarters were publicized.
Mild steel 1.
Low carbon steel has a carbon content of 0.04-0.3% and is the most common grade of carbon steel. Mild steel is also considered low carbon steel because it is defined as having a low carbon content of 0.05 to 0.25%. Mild steel is malleable and highly malleable and can be used in automotive body parts, panels and wire products. At the high end of the low carbon range, with up to 1.5% manganese, mechanical properties are suitable for stampings, forgings, seamless tubes and boiler plates.
2. The medium carbon steel
The carbon content of medium carbon steel ranges from 0.31 to 0.6%, and the manganese content ranges from 0.6 to 1.65%. The steel can be heat treated and quenched to further adjust the microstructure and mechanical properties. Popular applications include shafts, axles, gears, rails, and railway wheels.
3, high carbon steel
High carbon steel has a carbon content of 0.6-1% and a manganese content of 0.3-0.9%. The characteristics of high carbon steel make it suitable for use as spring and high strength wire. These products shall not be welded unless a detailed heat treatment procedure is included in the welding procedure. High carbon steel is used for cutting tools, high strength wires and springs.
4, ultra-high carbon steel
Ultra-high carbon steels have a carbon content of 1.25-2% and are known as experimental alloys. Tempering can produce very hard steel, which is useful for applications such as cutting tools, axles or punches.
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