I need to install 4 bar stainless steel piping system (40 meters length, 20 Tee, 40 Elbow) . do you recommend using compression fittings or welded fittings. I know that compression fittings is easy to assemble but they have leakage problems. Butt-Welded fittings on the other hand would make leakage-free pipeline but it need precise TIG (GTAW) welding (to have high quality welding orbital TIG welding is used) and if the welding is performed manually (by welder) it I may end-up with fittings been misaligned to the pipeline. So what do you recommend?