RTP Smoothwall Bolted Design vs. API 12B

In evaluating a Tank Connection RTP (rolled, tapered panel) bolted tank compared to an API 12B bolted tank, the design differences and performance in the field are significantly different. 

Please note the specifics:
 

      RTP Smoothwall Bolted Design

• Designed for dry bulk & liquid storage applications.

• Exact tolerance fabricated panels, which do not leak or develop future leaks

• Heavy design up to ½” plate.

• No interior or exterior ledges for product hang-up.

• Lap-joint connection allows pressure design use.

• Storage tank design has a history of no leaks & the highest customer satisfaction level.

• Silos are jacked from grade, which is safe tank construction. 

      API 12B bolted tank

• Archaic / outdated design originally adapted from crude oil storage. 

• Chime lap (bent flange) connection leaks and is difficult to seal in the field.

• Light gauge material design up to ¼” plate.

• Horizontal chime creates ledge for material hang-up.

• Tank design has a history of continuous leak problems. 

• Tanks are built using the same erection process used 50 years ago. This includes elevating people in the air on scaffold brackets and using a gin pole and air tugger.