If your vessel is non-recoverable then PTL can replace the old
tank.
PTL's main objective is to inspect, assess and possibly
coat the interior of these vessels before replacement is
necessary
Protection
On-site lining can be done, especially when access to the replacement
area is very restricted. ie. a tank can't be brought into a building
in one piece, rather, it is welded together in place after removal
of the old vessel.
Welding
All pressure vessel regulations (ASME, Boiler Safety Associations
of Canada, etc.) are strictly adhered to by PTL employees when
applicable.
Coatings Inc. 
If your vessel is non-recoverable then PTL can replace the old
tank.