Would bolted tanks be more economical compared to shop welded tanks?

When it is possible to build a tank in the ship and delivery it to site, a bolted tank would not be price competitive. However, for applications where quality of coating, and consequently, the longevity of the tank is important, a bolted tank should be considered.

Typically, bolted tanks become price competitive with shop welded tanks at around 380 m3 (100,000 USG).