good welding and high pressure stainless steel pipe boring

TIG welding is traditionally used for welding stainless steel tube and pipe, and remains the optimal solution for extremely high purity applications on tube or pipe at or below 6-inch diameter and schedule 10 wall thickness. The preferred method for high purity food-grade stainless steel is an autogenous TIG square butt weld. Laser welding of stainless pressure tubesThe vast majority of welded stainless steel pressure tubing is produced with the gas tungsten arc welding (GTAW) process. This process often is referred to as tungsten inert gas (TIG) welding. However, with the recent advent of reliable, high-power laser power sources, the laser beam welding (LBW) process has moved quickly into stainless welded tube manufacturing.

The Miller PipeWorx 400 Welding System with arc performance thats optimized for fab shop pipe welding is rated at 400 amps at 100% duty cycle, ensuring a strong, consistent arc all day, without having to stop in most process pipe scenarios. This is particularly helpful in applications where larger diameter wires and higher wire feed speeds are used and the power source continually works at higher amperage levels. Three welding techniques for stainless steel welded pipe good welding and high pressure stainless steel pipe boringStainless steel welded pipe technology-high frequency welding. Frequency welding has a higher power source and can reach a higher welding speed for steel pipes of different materials and outer diameter and wall thickness. Compared with argon arc welding, the welding speed is more than 10 times. Therefore, the production of general-purpose stainless steel pipes has higher productivity. Welding Pressure Pipeliners and Piping Systemsto meet strict radiographic requirements for high pressure, high tem-perature or low temperature piping. Because of the low hydrogen deposit, these electrodes have an advantage for high strength pipes susceptible to hydrogen cracking.-4-CROSS COUNTRY PIPELINE Vertical Down Welding Joint Preparation

of stainless steels and how their microstructures can change during welding. Figure 1 Thermal Affected Area of Metal Due to Welding AUSTENITIC STAINLESS STEELS Austenitic stainless steels (Table 1) containing chromium and nickel as the principal alloying elements (in addition to iron) are identified as AISI 300 Series types. Those containing