Square tube manufacturer Prospect analysis
At present, square and rectangular tube manufacturers are needed in many fields. In order to use square and rectangular tubes, the surface treatment will be very strict. Large diameter square and rectangular pipe manufacturers have used reinforced concrete in industrial and civil buildings in China for many years, with long construction period and heavy pollution. In recent years, with the successful market promotion of hot rolled H-beam products of Laigang, the welding methods of large-diameter seamless square rectangular tubes and special-shaped square rectangular tubes in the construction industry are expanding.
Structural laboratory buildings, model rooms and buildings were listed one after another. The design and construction standards and specifications of Q345B square rectangular pipe, large-diameter rectangular pipe, seamless rectangular pipe, special-shaped rectangular pipe and rectangular pipe manufacturer Shandong Yijia Materials Co., Ltd. have also gradually entered the improvement stage. In recent years, China's steel structure industry has taken a big step forward. At present, the structural application of square and rectangular tube production enterprises in China is mainly that various steel structures are welded together with hot-rolled H-shaped steel. The production capacity of square and rectangular tube manufacturers in China has reached 3 million tons, and the production capacity of welded light H-beams and various steel structures has also reached hundreds of thousands of tons. The annual output of welded pipe in China is more than 7 million tons. Among them, building steel structure accounts for less than 5% of the output of cold-formed square tubes and various cold-formed steels. The application of cold-formed steel in building steel structures in China is still in its infancy. The use of cold-formed square welded pipes instead of hot-rolled H-shaped steel columns has just started, and other cold-formed steels are also less used in the construction industry. The allowable deviation of wall thickness of square and rectangular pipe manufacturers shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is not more than 10mm, and the allowable deviation shall not exceed plus or minus 8% of the wall thickness when the wall thickness is more than 10mm. The wall thickness of corners and welding areas is excluded. Manufacturers of square and rectangular pipes can provide non fixed length products with short length and length not less than 2000mm. The welding method of special-shaped rectangular pipe can also be delivered in the form of interface pipe, but the interface pipe shall be removed during use.
The weight of terminal and non terminal products shall not exceed 5% of the total delivery, and the manufacturer of square and rectangular tubes with theoretical weight greater than 20kg/m shall not exceed 10% of the total delivery, while the bending degree of square and rectangular tube manufacturers shall not exceed 2mm per meter, and the total curvature of large diameter seamless square and rectangular tubes shall not exceed 0.2% of the total length. The square and rectangular pipe manufacturers are convenient for construction. Generally, the circular pipe concrete column of the steel structure house needs further construction, and the circular section is changed to square. It is a difficult point to connect the tubular concrete with the beam. It is believed that cold-formed square steel tubes and rectangular tubes will occupy an important share in the future steel structure market.
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