This group of equipment works in high temperature and pressure conditions along with fluctuating temperature conditions. The high range of temperature, in addition to the fluctuating nature of pressure and temperature, in addition to common calculations in design, requires more accurate and complex calculations, and in many cases, this issue also includes creep and fatigue calculations. Also, in most cases, these equipments should be designed under the ASMe sec 8 div 2 standard, whose calculation process is far more complicated and accurate. In addition, due to the high temperature conditions, in many cases, these equipments require special refractory coatings as well as special alloys such as SA336 f11 cl2. Few in the world are able to supply and manufacture these equipments. For the first time in Iran, Asas Sanat Pars Company has succeeded in designing and manufacturing this group of equipment and has built two Molecular Sieve dryers with a design pressure of 88 bar and a design temperature of 305 °C, with a body thickness of 90 mm and an approximate weight of 95 tons. . This equipment is currently being serviced in Pardis Petrochemical
After the successful construction of the above equipment, this company has been officially approved as the first specialized dryer manufacturer in the list of manufacturers of the Ministry of Oil.

Scope of work: Design & Manufacturing of 2 Molecular Sieve Dryers
Client: Pardis Petrochemical Complex
Engineering Consultant: HEDCO company
Qty: 2
Total Weight (t): 115,166
Material: SA-516 Gr.70N, SA-387 F11 Cl2, SA-335 P11
Maximum Length (mm): 12,680
Maximum Diameter (mm): 2,500
Maximum Pressure (bar): 88
Maximum Design Temp. (°C): 308
Maximum Thickness (mm): 90
Refractory: Castolyte 26LI with a thickness of 90 mm
Nozzle Type: SRF Class 900