Review on Superior Quality Lawson Industries FT30006B Stainless Steel Universal Flex Tube - Unmatched Performance and Durability by Richard Deng

I'm not a welding expert but it took some time to weld these flex sections to my stainless steel pipe due to the flex sleeve melting or cracking a lot, looks like stainless steel on the flex sections was a softer metal than my pipes. Once I dialed it up with higher heat and gas pressure the welds looked fine, the flex sections still look brand new.