Are these Metalbestos sections any good?

[hoverwheel]

I'm getting ready to put up a chimney to service the 30NCH I picked up earlier this year.

I've decided on Selkirk Metalbestos and started ordering parts. I recollected I have several sections of straight pipe salvaged from someplace or another years ago. Four straight 18" pieces and a chimney cap.

Below are some pics. Are these in good enough condition to use? One, I'm quite sure is not. The long-way seam is bulged out. The others look ok. Certainly not enough to make a massive difference in the install cost but it would help if I can use them.

1) Will these mate to the chimney pieces I've ordered? (Selkirk Metalbestos 6UT-36 6-Inch X 36-Inch Stainless Steel Insulated Chimney Pipe)

2) Are they in good enough condition to use?

 

[Jackfre]

The couplings have not changed. They should make up fine. You have obvious corrosion on two of those pieces. Use the two good ones. Ditch the others.

 

[Everhard]

Is the old stuff 7"? If so it won't work with the 6" you're going to buy? What does the stove call for?

E.

 

[hoverwheel]

Those are quite old - from a 70's or 80's era installation.

This is for a 30NC, 6" flue. I've ordered but haven't gotten the first pieces yet to compare. I'd hoped I could use a couple pieces and save a little, but it sounds like not. C'est la vie.