Black stuff and metal shaving in new tanks?

[SR_matt]

I picked up an SL2 matte from ANS a week ago and when I got it I noticed threads were kind of dirty, cleaned them, and then took a look inside and found that it was not nice clean metal but was dark and had some fine metal shavings. Was able to rub some of it off with a bore scope and seems like it may be carbon fiber dust and a bit of aluminum shavings. ANS is replacing it but then I decided to check my other on (different color but same SL2 matte line that is a bit older so they are discounted). Well found the same thing in the tank I’ve been using for 8 months… and I highly doubt it’s from the air fills as I have another tank that I filled from the same place that didn’t have that in it (plus the new one I didn’t even air up).

Anyone seen this before? Is this “normal” and I just never had pulled tanks apart to notice?

[William the Third]

I've been seeing metal in quite a few new tanks recently. It's swarf left over after the threads are cut, and it's not being properly cleaned out.

[SR_matt]

I've been seeing metal in quite a few new tanks recently. It's swarf left over after the threads are cut, and it's not being properly cleaned out.

yeah I guess I am confused how that happens as the tank has to get hydroed and I would assume it should get washed out in that process. At least I can't imagine that cutting the threads after hydro could be an acceptable practice as it would be modifying the tank after testing.

the metal I am honestly less worried about than the black crap. metal I could wash out easily, this black junk is like caked on kind of.

[Axel]

I know nothing about this particular issue, but as a supplier quality professional, let me just say that while you might expect manufacturers to have their collective sh*t together on the basic qualities of the parts that they make every day for years and decades, you would frequently be wrong.

[Grendel]

Lol, you ain't kidding. I worked with manufacturing quality for years and is a constant battle between what is right to do and what it costs to do. I am so glad I am no longer directly connected to manufacturer or supplier quality.

[SR_matt]

Oh yeah I was a quality manager in regulated manufacturing for a while and now work for a company that does regulatory and quality consulting (med device and alternative tobacco products primarily). I feel like if I didn’t have at least 3 WTF’s per day then that mean I was going to end the week with an absolute shit show haha.

Granted I also understand that even 100% inspection doesn’t yield 100% good parts. Hell the amount of times I had retail stores that were part of a sister company selling what we made say “oh yeah we have seen that issue for months” and I would look at them and have to refrain from punching them and say “and when did you report it? Because I don’t have it listed in my quality complaints log…”