Steel Structure

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Steel  Structure

1.Length of the welding withnot indication, full welding should be applied
2.Seam without indication is fillet weld, height is 0.75t
3.The cutting angle without indication, radius R=30
4.Cutting angle not specified should be
5.The diameter of the hole for the bolt if not specified, D=22

Project Reference:

For the Steel structure project of Upper part of external
piperack for air separation and gasifying facilities of
460,000 tons MTO (Methanol to Olefins) project in
Duolun, we provide about 4,500 tons steel structure. It
is a heavy chemical indusry of national energy project.

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Q:How to distinguish between steel structure materials and structures, steel types and specifications?
Carbon structural steelAccording to the current national standard "carbon structural steel" (GB700) regulations, numerical grade carbon steel structural yield point represented by the letters Q, yield point (N/mm2), the quality grade of symbols and symbol deoxidization method four parts according to the order.Carbon structural steels are divided into five kinds: Q195, Q215, Q235, Q255 and Q275. The greater the yield strength, the greater the carbon content, strength and hardness of the carbon structure, the lower the plasticity. Among them, Q235 in use, processing and welding performance is better, is one of the steel commonly used in steel structure.Quality grade is divided into A, B, C, D four, from A to D that quality from low to high. Different quality grades of steel require different chemical composition and mechanical properties. A no impact on regulations, only in the cold test only when the carbon, silicon and manganese content can not as delivery conditions; the B level, C level and D level were required to ensure 20 C and 0 C, 20 C Charpy V notch impact energy is not less than 27J (longitudinal), were required to provide assurance of conformity of bending test, as well as carbon, manganese, silicon, sulfur and phosphorus content of warranty. When all steels are delivered, the supplier shall provide the quality assurance of mechanical properties such as yield point, ultimate strength and elongation.
Q:What is an engineering structure?
The main vertical frame structure stress system composed by Liang Hezhu; the main vertical shear wall structure of the mechanical system composed of reinforced concrete wall; tube structure is in the high-rise building, the elevator wells, tube wells such as stairways or enclosed walls formed within the tube, can also be used in exterior or close packed column as the outer tube, or both the formation of tube in tube structure, frame, shear wall and tube can also be combined to form a frame shear wall structure and frame tube structure system; tower structure is fixed at the lower end, top free towering structures; the mast structure is composed of a bottom hinged or rigid structures erect slender pole mast and a plurality of layers of cable composed; bearing structure is composed of a flexible cable structure by cable and edge components, cable material can be used in steel beam, steel wire, steel strand Wire, bar, fiber composite materials and other good properties of wire tension; and the floor load through a sling or transfer to the level of suspension boom is fixed on the barrel body or pillar beam or truss, and through the cylinder or post transmission to the structure known as the foundation of the system of suspension structure; shell structure is composed of a curved plate with the edge member (beam, arch and truss) space structure; truss structure is a plurality of bars in a certain grid form spatial structure through the connection and the formation of;
Q:What is a steel structure?
Steel structure is mainly made of steel material. Mainly used in bridges, buildings, lighthouses, boats and other fields. In addition to the steel structure, there are wood structure, concrete structure, brick concrete structure and so on.
Q:How can steel structures be made from bolts or bolts? High strength bolts are generally used for installation or production?
It should be said that the steel structure is made unless a small number of bolts are used for positioning in the process equipment and the bolt is removed after completion of the assembly. All other bolts are mounting bolts, including high strength bolts. The production process does not use high-strength bolts, high strength bolt than ordinary bolt because of high cost and high strength bolt cannot be used for the two time in technology (because of the bolt torque coefficient needs to be determined, determination of the torque coefficient is discarded).
Q:How to calculate the allowable slenderness ratio of steel structures under compression?
The slenderness ratio of the structure is I = l/i, and the radius is gyration radius.The buckling stress in the axial compression members of steel structures is only related to slenderness ratio.
Q:What kind of building materials are used in steel structure engineering?
In the early stage of steel structure engineering, we should pre bury and embed the steel bar, that is, the anchor bolt. The material of the anchor bolt is Q235B. There are big and small.
Q:The role of stiffeners in steel structures?
Because the product can overcome the wall thickness from the difference of stress caused by the uneven deformation of the products.
Q:What kind of steel is used in steel structure?
It depends on the kind of steel structure. There are thousands of kinds or even thousands of kinds of steel. General steel construction refers to the construction of steelIf the construction of steel, then basically steel Q235, Q345, Q390, Q420 four kinds of steel. Q235 is plain carbon steel. The latter three are low alloy steels. Corrosion depends on the structure of the steel structure and the use of parts, ships, viaducts, a corrosion resistant period of more than 20 years, but not up to this standard, foreign countries are basically sprayed aluminum and zinc sprayed. Antiseptic method. The tall tower structure of the TV tower mast varies from 10 to 20 years. The general steel structure must basically be more than 5 years.
Q:What is the difference between a reinforced concrete structure and a steel concrete structure?
The reinforced concrete structure is a structure made of steel and concrete. The steel bars bear tension and the concrete bears the pressure. The utility model has the advantages of firmness, durability, good fire resistance, steel structure, steel saving, low cost, etc..Because the steel has good plasticity and toughness, and can have large deformation, can well withstand dynamic loads, the second steel good homogeneity and isotropy, an ideal elastic body, most consistent with the basic assumption of the general engineering mechanics. Therefore, the seismic performance of the steel structure of the seismic performance of reinforced concrete structures.
Q:Can steel frames and channel steel be welded longer?
There is no special requirement for the splicing of steel in general steel structure, so long as the design size can be reached.Frame steel channel is a general steel structure, only requires strong welding, forming beautiful, no deformation.

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