The Tank Lining Process

After excavation uncovers the tank top and liquid product is removed from the tank, the field crews peform the following procedures:

Monitoring Vapor Reading
(1)VAPOR PURGING

Using large amounts of compressed air, fed through an eductor purging system, the environment inside the tank is brought to safe levels, allowing crew entry.

 

Cutting manwayOpening Manway

(2)ACCESS OPENING

If a tank does not have a factory installed manway, the Armor Shield technicians will cut open the tank for interior access.

 

DesludgingDOT barrel

(3)DESLUDGING

The tank is cleaned of all sludge and liquids. DOT approved barrels are used to store the removed waste materials.

 

Blasting the surfacePreparing

(4)ABRASIVE BLASTING

The tank then receives an abrasive blast to prepare the surface and create a 4 to 4.5 mil profile.

 


Weak AreasTesting

(5)TANK INSPECTION

The interior tank shell is then tested for weak or permeated areas using methods from such national standards as API 1631 and NLPA 631.

 

Repaired AreaHole

(6)REPAIR

Any weak or permeated areas detected during inspection which fall within allowable repair criteria are repaired in accordance with the accepted industry practices.

 

(7)COATING APPLICATION

The entire tank interior is then spray coated with our proven polyester materials to defer future corrosion and reduce sludge build-up.

 

(8)TESTING AND QUALITY CONTROL

Testing is conducted on the interior lining using methods to insure uniform thickness, material hardness and absolute coverage.


       

(9)SEALING ACCESS OPENING

Once interior work is completed, the access opening is sealed with overlapping plates or a manway with bolted removable cover is welded in place.