System Engineers Storage Calorifiers offer vast rage for Industrial and Domestic Hot water supply systems. Specially designed Very High efficiency Heat Exchanger provide most Economical solutions. System Engineers Calorifiers would use various different Primary Heating Systems.
Low temperature hot water is the most common means of heating. Flows are usually based on a temperature drop of 11°C(from 8271°c)
Medium temperature hot water systems are generally designed on a temperature drop 30°C (from 12090°C).
High temperature hot water systems are generally y designed on a temperature drop of 40°C (from 150110°C).Another important factor in the selection of primary water heating systems is the working pressure. Where the primary working pressure is greater than the shell design pressure the calorifier must be fitted with a bursting disc sized in accordance with the requirements of BS 853. Primary water pressure drops are generally not greater than 25kPa.
Steams is an ideal medium for water heating. The heat exchangers can be designed to accommodate a wide range of pressures, although most users prefer to have calorifiers operating with pressures below 10 Bar g. Superheated steam can be accommodated and the degree of superheat should always be stated at the enquiry stage.
Thermal oils have the benefit of high temperature combined with low operating pressures. The heat exchangers are generally manufactured from stainless steel, depending on oil type.
At System Engineers, Calorifier vessel is Designed as per ASME code where as Heat Exchanger follows TEMA standards. System Engineers is Certified ISO 9001:2000 company, accordingly a full material trace ability is offered. Third party inspection control can be accommodated. This requirement must be stipulated at the quotation stage.
All commercial calorifiers carry a name plate specifying the following:
- Date of Manufacture
- Maximum working pressure, test pressure
- Calorific Capacity
Stainless Steel Shells
Austenitic Stainless Steel SS 304L & 316L is suitable for storage calorifiers, it contains Chromium, Nickel, Molybdenum and has a low carbon content 0.003% to improve corrosion resistance after welding. The passivity and general corrosion resistance of Austenitic stainless steel is excellent but they do suffer from chloride attack.
Good manufacturing techniques and a correct post manufacture treatment to restore the stainless steel to its original properties can reduce the susceptibility but complete corrosion attack can not be prevented.
U-Tube Battery For Calorifier
This is the most common type of heat exchanger used in calorifier manufacturing. High efficiency tubes unaffected by thermal expansion provide extremely high levels of reliability. To ensure a high heat transfer capacity a wide range of multi-pass exchangers are available. Standard bundle arrangements are manufactured from 20mm tube although other diameters are used depending upon the duty requirement. Tubes are generally welded into the tube plates. For tube bundles with straight lengths greater than 1250mm support baffles are fitted as standard. In order to ease disassembly batteries greater than 350mm in diameter are fitted with a tapped hole to accept a lifting eye. In addition runner wheels, collar bolts and starting screws can be supplied. Tubes are available in copper & stainless steel.
The dimensions shown should be used for general information only and are
subject to change. Fully detailed drawings are produced for each order.
Weights are approximate and based on 2.7 bar design and 4.0 test vessels.