Storage tanks
Field-erected storage tanks are the discipline this company was built around: fixed and floating roof, single and double shell, in carbon steel, stainless steel and 9% nickel for cryogenic service. We take the tank from annular plates through shell courses and roof structure to hydrotest, passivation and handover.
- Bottom and annular plate laying
- Shell course erection, fit-up and welding
- Roof structure assembly, lifting and welding
- Nozzles, manways, ladders and accessories
- Hydrostatic and leak testing
- Chemical pickling and passivation of stainless surfaces
- Tank vacuum test, peaking, banding, roundness and verticality
- Inspection support, quality documentation and mechanical completion
- Tank design & erection
- API 650 · API 620
- Welding qualification
- ASME Section IX
- Inspection & testing
- Hydrostatic · pneumatic · vacuum box
- Surface treatment
- Pickling & passivation
How a tank goes up
Five stages, in the order they happen on site. Each one is a scope we execute and a place where a tank is won or lost.
Elevation · not to scale
Foundation & ring beam
The tank starts below the steel. A reinforced ring beam and compacted pad carry the shell load, laid out to tight tolerance because every error here propagates up through forty metres of plate.
TEMCO scope
Setting out, ring beam coordination, levelling survey and acceptance before plate arrives.
Bottom & annular plates
Annular plates are laid around the perimeter with lap and butt welds, then the bottom sketch plates. The weld sequence is planned to control distortion, because an out-of-flat bottom cannot be corrected later.
TEMCO scope
Plate laying, weld sequencing, vacuum box testing of every bottom seam.
Shell courses
Rolled plates are erected course by course, each ring fitted, aligned and welded vertically then horizontally. Roundness, peaking and banding are checked as the shell rises, and verticality is surveyed continuously.
TEMCO scope
Course erection, fit-up, welding, and dimensional control to API tolerance.
Nozzles, manways & accessories
Shell and roof penetrations are set in with reinforcing plates, then ladders, platforms and handrails. Each nozzle is a discontinuity in a pressure boundary and is treated as one.
TEMCO scope
Nozzle and manway installation, reinforcement, ladders, platforms and accessories.
Roof structure
Radial rafters and the roof plate complete the tank. For larger tanks the structure is assembled at grade and lifted as one, the operation the whole erection sequence is planned around.
TEMCO scope
Rafter assembly, lifting, fit-up and welding, through to final closure.
Stage 01 / 05·Use arrow keys to step through
- Piping systemsProcess and utility networks in carbon, stainless and duplex.
- Structural steelFabrication and erection, from pipe racks to stacks.
- Pressure vesselsInstallation and mechanical equipment set to code.
- Testing & pre-commissioningHydrotest, pickling, passivation and mechanical completion.
- Maintenance & shutdownsRevamps and turnarounds inside a compressed window.