I wouldn’t, but maybe someone here does. Probably doesn’t matter much for fuel lines though. I think that on shore products may be more consistent quality than off shore stuff.
I .ok at this way, Chinese stainless steel is junk so why would there copper blended tubing be any better?
In the mid 70s ( and maybe before) Volvo used steel brake lines coated with some white stuff. I always figured it was enamel or something. After 100,000 miles in salty Massachusetts the lines would rust and fail where the fitting tore up the coating. Shortly thereafter Volvo went to cunifer etc. SAAB and Mercedes followed suit. Now it's use is the law "over there." I think single flares are actually illegal for brake lines per DOT. It definitively is easier for a single flare to thin the stretched/flared edge, and crack when being formed. Double flaring folds the material at the end of the tube back on itself without a thinning. at all. I think I can find the SAE Standard for that. SAE does not make laws, but in many industries their Standards must be followed https://rbisj.com/2020/11/do-brake-lines-need-to-be-double-flared/ https://brakeexperts.com/do-brake-lines-need-to-be-double-flared/
The Fedhill company claims their tubing is thicker than their competitors' and better in every way, and imply that it is made in Britain: https://store.fedhillusa.com/ The AGSCompany claims their NiCopp tubing is the cat's meow of tubing, better than the competition, and the Chinese companies claim their cunifer is made to all the applicable standards. https://www.agscompany.com/products/nicopp-nickel-copper-brake-fuel-transmission-line-tubing-coil I guess if I were plumbing a whole car I'd spend a few hours on the internet trying to figure out what's really going on.
Got mine from Inline Tube off of Ebay. I think they are located somewhere in the Detroit area. Have had no problems with there NiCo tubing.
I've bought a lot of NiCop tubing from Inline Tubing on ebay as well. All made in the USA and has a DOT number printed on the tubing. They are a speed shop.
There is a big difference in copper plated and nicop be super sure what your purchasing . I will never use anything but nicop .
I bent all my brake lines from steel and used the Eastwood Flaring tool. The Nickel Copper line isn't as sharp looking. I hit the steel line some with Scotch Brite and then clear coat.
Well I've seen a lot of copper shiny as new mainly on ships lots of the stuff and depends on moisture in the environment and how much 0000 steel wool you get . Just lay on a creeper every now and then and enjoy your handy work
I'd seal your garage floor so emits less moisture at the car and directs it away from your car . Moisture travels up
I apologize for breaking that HAMB rule (actually more of a guideline, technically). Here is a few of the 41 PU's lines in SS and SS gravel guard. I used these loops to allow the cab to be removed for painting without opening my bled brake system. I use the SS guard near the tires and high traffic spots on the frame. I have wondered what polished SS guard over polished Nicop would look like? Hmmm It doesn't stop any faster but that ni-copp stuff would clash with me chrome! Harder to bend, harder to flare, but hard as hell. And since the roadster gets upset when I fail to post a picture of her and only the truck.... Bend it, flare it, polish it (why wouldn't you? ) and install it. It is my preferred brake line material. I mean, it would have been easier for Michelangelo to sculpt his statuary from foam or plaster. I'm not saying my brake lines belong in the Louvre but I have been there and seen worser creations on display.
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