Keep S.r.l Member Company has taken over the dedicated hydrodynamic pressure cleaning business unit of Demont Srl, maintaining the management, equipment, technologies and therefore the experience gained in decades of activity.
The applied methodologies, together with the modern technology systems adopted, guaran- tee the best operational results and maximum customer satisfaction in terms of quality and execution times.
The experience achieved, allows Keep S.r.l to offer the best high pressure cleaning services. Keep Srl also offers tube bundling services, burner maintenance and equipment rental, operating to the highest levels of quality and safety at work.
The professionalism and skills of the staff also allow the achievement of the best performan- ce with great speed and flexibility while respecting the highest levels of safety.
SERVICES
HYDRODYNAMIC
CLEANING
TUBE BUNDLING
SERVICES
BURNER
MAINTENANCE
COLD
CUTTING
EQUIPMENT
RENTAL
DECOKING &
STUD PIGGING
SERVICES
HIGH PRESSURE CLEANING
Our hydrodynamic cleaners use KINETIC ENERGY from jets of water with up to 1,500 bars of pressure, produced by volumetric pumps. Water jets are distributed at very high pressure and directed manually or using robotic systems, and they are used for the unblocking, descaling and cleaning of:
- TUBE BUNDLES, EITHER DISASSEMBLED OR IN-SITU;
- COLUMNS, RECEPTACLES, UNIT HEATERS, FILTERS, SHAFTS,
- TANKS AND OTHER OPERATIONAL EQUIPMENT;
- TUBES AND CONDUITS;
- HIGH PRESSURE CLEANING, HEAT EXCHANGERS CLEANING,
- DESCALING OF DISTILLATION COLUMNS, SOAKER, COILS, CLOGGED PIPES OF COAL, CONTAINERS, TANKS AND SIMILAR EQUIPMENT
The special hydraulic extractors of tube bundles, robotic equipment and different flow pumps are used to carry out:
- TUBE BUNDLES EXTRACTION/INSERTION
- TUBE BUNDLES TRANSPORTATION WITHOUT ANY CRANES
- AND/OR TRAILERS
- TUBE BUNDLES HYDRODYNAMIC CLEANING
- AIR-COOLERS, COLUMNS AND VESSELS HYDRODYNAMIC CLEANING – PROCESS LINES AND OTHER PLANT EQUIPMENT
- HYDRODYNAMIC CLEANING
The “Rotocar” is used for the internal lines cleaning whereas the “Prevenmaster” is used for the internal cleaning of the heat exchanger pipes. That allows descaling hard materials in total safety, avoiding the exchanger disassemble and transport to the washing area for traditional cleaning.
DECOKING & STUD PIGGING
Keep, using the latest technology, is able to offer a service that savestime and money and makes the heaters work more efficiently.The stud pigging system uses low-pressure water with high flow rates and a particular type of Pig designed to remove coal and other pipes residues, without causing any damage to the same:
- Bidirectional
- 360 ° coverage
- Chemicals free
- No damage to the heater pipes
- No pipes carbonization
- Low environmental impact
We can track Pigs using a pressure recorder and transmitter, in order to identify any problematic area quickly. The Stud Pigging System cleans the heaters and 180 ° curves. During an heather cleaning, it is possible to carry out maintenance works, thanks to a completely safety system
MECHANICAL DECOKING OPERATING PROCEDURE
PIG DECOKING METHOD:
The Stud Pigging System is a technology that uses water at low pressure and high flow to push pigs inside the coils of the heaters removing coke and other residues without causing any damage to the pipes.
Each machine pump is equipped with two pumps, that, to perform the simulta- neous descaling of two vaulted coils, are connected to the inlet and outlet of each of them.
During water circulation, the pressures and flows existing inside the coils are detected using instruments that graphically define the profile.
The first phase consists in the introduction of a plastic pig (a measure pig) inside the coil that, covering its entire length, detects the minimum diameter by identifying the area in which there is a greater deposit of coke.
In a second phase, the pigs are inserted. These, being composed of deformable material and equipped with appropriate abrasive heads, are able to cover both curves and heads coils. This feature allows the coke that covers the walls to be removed with a bidirectional movement.
The materials removed during the operation are recovered by the filtration system of the pumping unit, and afterwards, they are drained.
At the end of the operations, a final check is carried out through the “only water” circulation in order to generate a second graph of the flow rates and pressures to be compared with the graph recorded in the first phase of operations.
PIGGING PRELIMINARY OPERATIONS
1. Intervention planning
2. Arrangement of Pig launchers and receivers connected
with coils with flanges RF300
3. Equipment connection
3.1 Put the Pigging unit in position
3.2 Pig launchers and heaters inlet valves connection
3.3 Pig receivers and heaters outlet valves connection
3.4 Pig trap unit connection with hoses
3.5 Filling clean water tank
3.6 Engine Start
3.7 Hydraulic system control
3.8 Pressure recorder control
3.9 Water pump control
3.10 Pre-operational meeting
4. Assembly of Pig launchers
at the level of access places prepared in accordance with safety standards (walking way)
5. The emptying of the material collected
inside the machine’s tank will be carried out by self-purge
HSE
It is requested, the day before the start of operations, to organize a meeting in order to discuss all the necessary security criteria to be adopted during the operation.
All KEEP personnel are qualified to work in total safety.
Our staff will supervise all Pig launchers connection operations.
COLD CUTTING
Keep is specialized in cold cutting with the use of high-pressure water with additio- nal abrasive particles. This system can be used in Refinery and petrochemical plants for reactors cutting, columns, bottom walls and tanks’ roofs, heat exchan- gers and piping. It can be used in civil works for cement cutting or dismantling.
SYSTEM BENEFIT:
– Small size equipment
– Possibility of cutting in all positions
– Cutting of any type of steel
– Submarine application
– No noise emissions
– No dust or slag discharge
– No thermal or mechanical stress and / or breakage of the corners – No danger of explosion
– Large cutting depth in just one pass
– Compound material cutting (if any)
EQUIPMENT AND
TECHNICAL DATA
The following equipment will be utilized for decoking operation:
DOUBLE PUMP KEEP PIGGING SYSTEM UNIT WITH:
– Clean water tank, dirty water tank
– Pressure and flow recorder
– Equipment (traps, pigs, valves, hoses and other)
UNIT DUBBLE PUMP (N° 2)
– Pressure : 50/60 bars
– Engines : N° 2 Mercedes 420 HP
– Flow: 4 m3/min (4000 lt/min)
SIZE AND TECHNICAL DATA PIGGING UNITS:
Length 16.5 meters (Trailer length 13.60 meters)
Width 2, 5 Mt
Height 3, 8 Mt