Last time I checked, there was over 25 recipes that require Steel Pipe. I'd have to say it's probably one of the most used ingredients. Just to building and connecting just one of these storage container costs 111 pipe (90 to create 15 Encased Industrial Beam + 15 pipe for container, 6 more for 1 encased for the connection) multiplied by 900.
That's grand total of 99,900 Steel Pipe. It sure adds up really quickly before you know it.