According to China's development of long-distance pipeline construction process, summed up the entire cellulose-based, mixed, compound next to the three manual techniques and active gas shielded welding wire, flux cored wire from under the protection of the two semi-automatic and automatic welding technology activities to flux-cored arc welding and automatic welding technology to the next process characteristics and long-distance pipeline construction in China of the situation, pointing out that the automatic active gas shielded arc welding and automatic welding flux cored wire will be the country next to the long-distance pipeline under the direction of the welding technology.

With oil and gas and petrochemical industries to East Gas Pipeline Project as a symbol of China's long-distance pipeline construction peak has arrived. More and more to long-distance large-diameter oil and gas pipelines, high-pressure transmission direction. Under the long-distance pipeline welding technology since the 20th century to 60 years since the introduction of China, after decades of development, now under the hand of a mature technology to welding, is popular semi-automatic gas shielded welding technology, automatic welding technology and lower gas The combination of the welding technology as a long distance pipeline welding technology trends, will be in the national long-distance pipeline construction to promote.

Keywords: Mig Welding Rod

Tailor welded blanks have been widely used in body parts, ULSAB (World lightweight steel body Association) of the latest research results show that: the latest model of the steel body structure, 50% used a welding plate.

When the laser Welding Wire  for the manufacture of car body side, no longer need any stiffeners, stiffener and subsidiary of the production process, the weight and number of components will be reduced and the application of high ductility material also make anti-shock capability improved. At the same time, and no longer need to strengthen the board, in the B pillar, the application of tailor welded blanks can greatly reduce the accumulation of tolerances.

The adoption of tailored blanks, finished products not only improve the quality of the stability of the door components, so that the door is no longer a part of the adjustment problem, while reducing the weight of components, and the original seams sealed measures omitted, also The more environmentally friendly. In addition, tailor welded blanks in the door hinged on the application also allows the rigid regions are the overall strengthening of the door with the tolerance be greatly improved. Weight reduction, optimized production technology, then this will bring the cost down.

Audi A6 body strength and rigidity have been praised, the new Audi A6L made in the original improvements on the basis of the re: use of laser welding technology, body design (see Figure 3). The new Audi A6L hardened body, and its torsion strength increased by 34%. With the new body, chassis design combined with the use of advanced laser welding technology, solid body structure, so that the new Audi A6L made in the event of collision, the predicted body deformation zones, side crash protection beams and a reasonable interior space structure can be provide effective protection for passengers. They do not see touched not only the design and material selection can reduce manufacturing cost and weight of vehicles, but also maximum protection at the critical moment the lives of passengers.