How long do hog casings last?

[snadamo]

I purchased some hog casings last may, been used two separate occasions, and been in fridge ever since. Original packaging with ziplock seal and salted by manufacturer.

I know they last a long time. I guess my question is how long to too long? Are there any signs of it going bad (Sight, smell, etc)?
Since I’m new to sausage making, I don’t have much experience with this. I was planning on making kielbasa tomorrow with them.

As always, thanks for the input!

 

[Jbowie]

Sausage making

I have kept casings in refrigerator in a tightly closed plastic pan for probably 2
years and no illness.

 

[JRDINCC]

I've used them @ 3 years. No problem.
I've been told, FWIW, if no dark spots or off odor use em.

 

[snadamo]

Thanks guys. I took a peek at them and no bad odor and look the same. I’ll keep using them. Hopefully some kielbasa pics in near future