EPCM was awarded the Technical Advisors team to support Integrity Environmental Solutions (IES) on the refurbishment and construction of the Transnet Island View Fuel Storage Depot. Designed in accordance with EN-1405 & API 650 and inspected in accordance with API 653.
IES has requested EPCM to assist them with several calculations to ensure two 20,000 m3 Jet Fuel storage tanks can be repaired by fixing the peaking and banding. These tanks were initially constructed in 2013 and IES was contracted to complete the mechanical construction of these two tanks.
Peaking is when a vertical shell weld is not properly fitted up and makes a peak at the joint. This is caused due to the improper bending of shell plates or general misalignment. Banding is when a horizontal weld is not fitted up correctly and this causes the plates to be out of line.
Fixing peaking and banding requires all of the unacceptable welds to be cut open and welded up again using a backing plate to acquire the acceptable fit. This means that the heat affected areas will experience more residual stresses.
The Operating Stress Report shows what the effect of product (Jet Fuel) and water (Hydrotest) will have on the shell in its current state, before any repairs commence.
The project will further include the full refurbishment and construction of 6 x 18,000 m3 fuel storage tanks.