A steel structure is typically composed of steel or steel plates, forming a load-bearing system through welding or bolting. These structures are widely used in various applications such as bridges, workshops, industrial containers, high-rise buildings, and more. Their versatility makes them essential in both civil and industrial projects.

First, the Characteristics of Steel Structures:

1. Lightweight yet strong
2. High reliability and durability
3. Excellent resistance to vibration and impact
4. High level of industrialization in manufacturing
5. Quick and accurate assembly
6. Easy to create sealed structures
7. Vulnerable to corrosion
8. Poor fire resistance

Second, Grades and Performance of Common Steel Structural Materials:

Common types include carbon structural steel (e.g., Q195, Q235), low alloy high-strength steel, high-quality carbon steel, and special-purpose steels. The selection of materials depends on the project's specific needs, including load conditions, environmental factors, and structural design.

Third, Principles of Material Selection:

The material selection must ensure the structural integrity and prevent brittle failure under different conditions. Factors such as the importance of the structure, type of load, stress state, connection method, and working environment are all considered during the selection process.

Fourth, Main Technical Contents of Steel Structures:

Key technologies include high-rise steel structures, space frame systems, light steel structures, steel-concrete composite structures, high-strength bolted and welded connections, and protective coatings. Each has unique advantages and applications depending on the building’s requirements and scale.

Fifth, Objectives and Measures for Steel Structure Projects:

Steel structures require strict adherence to national and industry standards. Local authorities should focus on training, quality control, and technology development. Universities, design firms, and construction companies should work together to improve expertise and promote advanced CAD tools for better planning and execution.

Sixth, Connection Methods in Steel Structures:

There are three primary methods: welding, bolting, and riveting. Welding offers high rigidity but can introduce residual stresses. Bolting allows for easy disassembly and is ideal for on-site assembly. Riveting, though less common now, was once popular for heavy-duty structures due to its reliability and toughness.

Seventh, Welded Connections:

Welding methods include manual arc welding, automatic welding, and gas-shielded welding. Different weld forms like butt welds and fillet welds are used depending on the joint type and load conditions. Proper welding technique is crucial for ensuring structural integrity and longevity.

Eighth, Bolted Connections:

Bolted connections are divided into ordinary bolts and high-strength bolts. Ordinary bolts are cost-effective and suitable for static loads, while high-strength bolts offer greater load capacity and are used in critical joints. Bolt arrangements must be carefully planned for optimal performance and ease of installation.

PE Pipe Fitting E/F

PE Pipe Fitting electrofusion is used for gas and water, design and fabricated according to standard GB and ISO. The electric welding is much stronger than butt welding and sock fusion with less leaking risk. The copper wire and Nickel alloy wire is saftly for gas. the PE electrofusion pipe and fitting is convenient for installation and maintance.

Ningbo RMI Plastic Co.,Ltd offer PE pipe fitting E/F with specification:

Size:20mm to 110mm
Connection: socket fusion, butt welding, electrofusion
Standard: ISO
Pressure rate: PN10
Items: Coupling, elbow, tee, reducer, flange, union, reducing tee, female coupling, made adaptor, end cap.

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