Hot Water Firebox Boiler – 1000 Kilowatts.

P 1

Packman Company’s hot water boilers, Firebox Series, are designed as fire-tube and three-pass boilers with an internal return chamber according to the European standard EN12953, achieving an efficiency of 86%.

(Three Pass, Wet Back, with Internal Reversal Chamber)

These boilers are manufactured in capacities ranging from 100 to 1200 kilowatts and are designed to operate at pressures up to 16 bars.

Packman Company’s firebox hot water boilers are constructed using seamless fire-tube pipes and heat-resistant carbon steel plates in accordance with the specifications outlined in the reference standard. The thickness of these materials is determined based on the boiler’s operating pressure.

Furthermore, these boilers are constructed from integrated network of firetube pipes and corrugated combustion chambers, with specifications compliant with the mentioned standard.

In the manufacturing process of Packman Company’s firebox hot water boilers, the most advanced methods of submerged arc welding (SAW) and flux-cored arc welding (FCAW) with automatic machines are used.

Additionally, in-process inspections, including welding inspection and non-destructive testing (NDT), are conducted on weld lines during manufacturing.

After the completion of welding operations and the mentioned inspections, necessary tests such as hydrostatic testing are conducted. Accordingly, all hot water boilers manufactured by Packman Company will be equipped with standard plaques at the time of delivery to the customer.

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In the design of firebox hot water boilers by Packman Company, the three passes of flue gas start from the boiler furnace. The gas then passes through the second furnace, returns to the second-pass tubes, and is transferred from the front door to the third-pass tubes. The exhaust gas is directed towards the boiler flue after passing through the third pass tubes, which are located at the end of the boiler.

Packman Company’s firebox hot water boilers are produced as fire-tube and three-pass systems according to the BS-EN-12953 standard.

The furnaces of hot water boilers are manufactured according to the standard capacities using unique machines, and are constructed in a corrugated (ribbed) design. In the construction of corrugated furnaces, skill in calculating and producing the depth and pitch of each corrugation is very important. Packman Company, with over 50 years of experience in manufacturing steel boilers, has achieved this expertise.

Additionally, because the combustion chamber of firebox boilers is narrower compared to three-pass hot water boilers, firebox boilers are smaller than three-pass hot water boilers at similar capacities.

Packman Company’s boilers undergo stress-relief treatment according to the specified capacities and thicknesses, as per the aforementioned standard. The thickness of which is determined according to the boiler’s operating pressure.

The boiler tubes are made of ST35.8 seamless steel, which is exclusively imported by Packman Company from European countries.

Heat-resistant pipes are welded using special equipment with the method of fusion welding (for welding the network).

Boilers at Packman Company are welded using sub-arc and flux-cored welding machines from Isab Sweden, and with electrodes from Isab, Geka, and Ama. The welding of boilers is carried out under the strict supervision of Packman Company’s Quality Control (QC) team according to specified Welding Procedure Specifications (WPS). All necessary tests, including Ultrasonic Testing (UT) or Radiographic Testing (RT), are performed on the welds.

It should be noted that inspectors from the Standards Administration are permanently present at Packman Company (resident representative of the Standards Administration), and they review all necessary documents and tests. Upon delivery of boilers from Packman Company, standard plates will be provided, and if requested, documents such as WPS, PQR, etc., will be presented to the customer.

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