Shell Tube Heat exchanger Tie rod extension design

[Happydays123]

Getting a new carbon steel bundle fabricated in ethane service, approx 7.3m long. Tie rod material is supplied in 6m lengths and therefore requires joining to make up the length shortfall. So I am looking for guidance on what is standard practice in extending the tie rods, thinking of welding and annealing or some sort of threaded connection with a locking device/ spot welded to avoid it unscrewing in the future.

Thanks for the assistance in advance.

 

[SnTMan]

If your tie rods are ordinary sizes and materials I'd just weld 'em. That'd let you use ordinary spacer tubing, etc.

6 m? Really?

Regards,

Mike



The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[MJCronin]

IMHO, welding and annealing very long rod materials does not sound like a very good plan.

Have you considered a turnbuckle with spot-welded locking nuts on both ends ? You have the benefit of adjustability and possible future disassembly.

I agree with SnTMan with his comments about 6m ....



MJCronin
Sr. Process Engineer

 

[r6155]

Happydays123
Are you thinking in 6m with screw full length?. If yes, you are wrong. If not, change the supplier

Regards
r6155, if

 

[SnTMan]

Yes. Buy plain rod, cut it to length, thread 1" one end, 2" the other. Give or take.

The problem with sloppy work is that the supply FAR EXCEEDS the demand