Wide Span Prefab Steel Structure Plant Construction Building

Wide Span Prefab Steel Structure Plant Construction Building

1.Steel Structure Shot Blasting Specification

National standard GB8923-88 “steel surface before painting Rust grades and preparation grade” good machining steel parts before painting methods commonly used shot blasting.

Raw materials

The grades of the unpainted steel surface are presented by A、B、C、D according to the coverage extent of the oxide layer and the serious degree of the spot erosion.

Grade Sa1

Slight de-rusting through blast rust cleaning. The surface must be free of grease, dirt  and attached unfixed oxide coat, rust, paint coat and other attachments.

Grade 2.5

Thorough de-rusting blast rust cleaning. The surface must be free of grease, dirt and attached unfixed oxide coat, rust, paint coat and other attachments. Any slight traces left are strip or spot-like light-color mottle.

Grade Sad3

Stainless de-rusting thorough blast rust cleaning. No grease or dirty，  oxide coating，rust, paint coat and other attachments can be found on the steel surface， the metal surface must present the metallic luster.

2. Weddings

2.1. Gas shielded arc welding

Steel structures commonly use GMAW welding after assembly. Gas shielded arc welding regards the gas as a medium and takes the protection for the arc and welding area. Gas shielded arc welding enjoys good visibility to arc and weld pool. In addition, GMAW seldom has slag and obvious welding deformation.It is quite suitable for mechanized welding with spatial location.

2.2. Automatic Submerged Arc Welding

After H type steel structure being assembly, automatic submerged arc welding (gantry welding) is commonly taken into welding process. The automatic submerged arc welding is a kind of method named electric arc welding that the arc burning would be occurred in flux layers. Automatic submerged arc welding has outstanding advantages, there are high weld quality and brilliant protective effect of slag isolated from the air. Furthermore, the welding parameters can be automatically adjusted to maintain stability with stable welded composition and remarkable mechanical properties.

2.3. Full Penetration Welding

The design for steel butt weld and welding plate connections are commonly required the full penetration welding into use. Full penetration welding is a welding method that penetrates welding fittings are in the welding process with high strength weld and stable quality. Manufacturers often have double-sided molding process to fusion the groove base metal in remarkable condition,as shown:

3. Produce Process

3.1. Drawing manufacturing

3.2. Drawing

3.3. Get the materials ready

3.4. Multi-head Digital Cutting Machine

3.5. Assembly

3.6. Automatic Submerged Arc Welding

3.7. Flange Plate of Straightening

3.8. Riveter Manufacture

3.9. Welding

3.10. Semifinished product

3.11. Sanding and Descaling

3.12. Spray Paint Processing

3.13. Transferred  Materials Transportation

3.14. Skeleton Installation

3.15. Roof and Wall Construction

3.16. Overall inspection and acceptance

SBS Prefabricated Building is a new type environmental friendly product that adopts steel structure as frames, various plates and panels as surrounding protection system, high strength bolts as component connection. The Metal Frame buildings are mainly used as Modular House, office, cleaning workshop, cold storage room, prefabricated steel workshop, Metal Frame Warehouse, steel structure plant, exhibition hall, stadiums, hangars, steel-structure supermarkets, high-rise steel constructions, logistics center, other metal product and so on. SBS products are exported to more than 70 countries and regions covering Middle East, Africa, Southeast Asia, South America etc.