In the design of the return furnace hot water boilers by Packman Company, the flue gases pass twice. They first pass through the boiler furnace, then return through the same furnace to enter the second-pass tubes, and are directed from the rear door towards the boiler’s chimney.

The return furnace hot water boilers by Packman Company are manufactured as fire-tube and two-pass boilers, based on the BS-EN-12953 standard.

The boilers from Packman Company are manufactured in specified capacities according to the mentioned standard, and stress-relieving is performed based on the thickness. 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 the boilers is carried out under the strict supervision of Packman Company’s Quality Control (QC) team, following specific WPS (Welding Procedure Specifications). All necessary tests, including UT (Ultrasonic Testing) or RT (Radiographic Testing), are performed on the welds of the boilers.

It should be noted that inspectors from the Standards Organization are permanently present at Packman Company (resident representative of the Standards Organization) and 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.