Air Cooled Heat Exchangers

Boldrocchi Company designs and manufactures a wide range of air cooled heat exchangers, used worldwide in utilities and industrial applications; serving the petroleum, chemical, gas processing, electrical, power generation, environment and steel industries. From small coolers for endothermic engines, for compressors and dryers up to several banks of bundles for vapors condensation and for petrochemical processes.

The production includes fin fan coolers for:

- Gaseous and liquid hydrocarbons
- Steam and vapors
- Water and lube oil closed circuit system
- High pressure intercooler and aftercooler
- Compressed air and gases
- Gas heaters and coolers
- Air pre-heaters and heat recuperators
- Air coolers for refinery services and for general purpose
- Forced and induced draft air coolers
- Surface and vacuum air condensers
- Finned tube coolers and heaters
- Shell and tube heat exchangers and feedwater heaters
- Special application

Plant: AUGUSTA REFINERY (ITALY)

SPLITTER OVERHEAD CONDENSER (Duplex material construction)

Duty: 6.400 kW
Design Pressure: 6 bar
Total Installed Power: 148 Kw

REACTOR EFFLUENT COOLER

Duty: 3.900 kW
Design Pressure: 21.5 bar
Total Installed Power: 120 kW

All our pressure vessels can be supplied, on customer’s request, ASME “U” stamped.
Boldrocchi is also approved and licensed manufactures by Chinese Authority (OBA).

With the support of an on-going R&D department, Boldrocchi can constantly improve its products. A computer aided design network speeds up technical work and enable engineers to examine different approaches and to reach the best solutions. High efficiency and low noise fans are provided by the daughter Company COMET, strictly related with our design department.
All projects involve a process of:

- Thermal design according to current and well established operating techniques and using worldwide recognized software
- Mechanical design according to the main standard codes such as API, NACE, TEMA and supply of pressure parts stamped with CE mark as per PED Directive or ASME U stamp
- Structural and stress analysis with finite element methods
- Design solutions for low noise level installations
- Optimization of the required power, guaranteeing easy transportation, installation and maintenance

To find out the best performance for each case, ensuring heat transfer coefficient combined with low pressure drops, Boldrocchi provides several types of spiral finned tubes.

A variety of base tubes: from 1/2 inch to 2 inch diameters and different metals such as carbon steels, stainless and special steels, copper alloys, aluminium and titanium can be finned with several sizes and materials to satisfy customer and design requirements. Based on a lot of different fining machines Boldrocchi can supply three basic configurations on finned tubes.

1. G-Type Fins (mechanically embedded)
Rectangular cross-section fin wrapped under tension and mechanically embedded in a groove spirally cut into the outside surface of a tube. Can be used for maximum Design Process Temperature of 400°C

2. L-footed Fins
L-shaped fin wrapped under tension over the outside surface of a tube, with the tube fully covered by the feet between the fins. Can be used for maximum Design Process Temperature of 130°C

3. KLM - Knurled footed
L-shaped fin wrapped under tension over the outside surface of a tube, while the foot of the fin simultaneously pressed into the ribbed outer surface of the tube. Can be used for maximum Design Process Temperature of 200°C

To fit customers’ process requirements Boldrocchi designs, manufactures, tests and assembles all the main components: finned tubes, fans, headers and structural elements. A work force of skilled craftsmen combined with the best welding techniques ensure high quality welding, guaranteed by radiographic, ultrasonic, magnetic and liquid penetrating inspections and, after assembly, by hydrostatic and leak testing. Air coolers may be designed to be preassembled in the Boldrocchi factory and several options are available to minimize power consumption, to avoid freezing and to provide a low-noise environment.
More than 200 welding procedures have been qualified and tested by international Boards.

Six Different Power Plants (IRAN)

N.30 WATER GLYCOL CLOSED CIRCUIT COOLERS

Total Duty: 73.500 Kw
Design Pressure: 6 bar
Total Installed Power: 88 kW