Heat transfer solutions Heat exchangers
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2021
TI-P593-02 TES Issue 1
U-tube bundle type shell and tube heat exchangers UPI, UPC and UPF
Description The heat exchangers with removable “U" type tube bundle are among the most common units installed in hot-water plants and in industrial processes, due to the low-cost of manufacturing and solidity. The design of these heat exchangers make them particularly suitable for applications with saturated, superheated steam or diathermic oil as primary fluid. The primary fluid is always fed on the tube side. Mounted on a single carbon steel tube sheet, the U-tube bundle can be removed once the head is disassembled. The standard design includes 16 bar as design pressure with PN16 flanges; the tube bundle can be made of 316L stainless steel (UPI series), copper (UPC series) and carbon steel (UPF series).
The shell is made of carbon steel and the vent and exhaust connections are integrated in the coupling flange, while the rear side connection can be lateral or, on request, axial. Special versions may be built on request (materials, design conditions, dimensions other than the standard). The U-tube models design uses up-to-date technological and production methods, most advanced calculation systems (thermodynamic calculation, vibration analysis) and all the acquired research knowledge. The design and construction are in accordance with the European standard EN 13445 and 2014/68/EU - Pressure Equipment Directive (PED) for pressure systems and with the marking when required. The products have been specifically designed for use on steam, air or water which are in Group 2 of the above mentioned Pressure Equipment Directive. Spirax Sarco should be contacted to confirm the suitability of the product for use on alternative fluids and applications. Assembling of “U" series heat exchangers is made in Spirax Sarco factory in Via per Cinisello, 18, in Nova Milanese, Italy.
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PED categorisation of standard U-tube type heat exchangers
Heat exchanger (diathermic oil or hot water as primary fluid)
Heat exchanger (steam or superheated water as primary fluid)
Generator (steam, diathermic oil or superheated water as primary fluid)
Shell Ø"
Nominal length
Nominal length
Nominal length
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
5" 6"
SEP Cat. I Cat. II
Cat. II Cat. III Cat. III
Cat. I Cat. I
Cat. III Cat. III
No CE marking Art. 3 comma 3 2014/68/UE Directive
8"
Cat. II Cat. II
Cat. III Cat. III
10" 12"
Cat. II Cat. II Cat. II
Cat. III Cat. III Cat. III
Cat. II Cat. II Cat. II
Cat. III Cat. III
Definitions used in Directive 2014/68/EU (PED): Heat exchangers
= Pressure equipment used for producing hot water* at T ≤ 110°C in cold water circuit
Generators
= Pressure equipment suitable for producing steam or superheated steam** at T > 110°C in both circuits
*Hot water = Liquid in Group 2 (non-hazardous) with steam saturation pressure ≤ 0.5 bar g at maximum temperature **Superheated steam = Fluid in Group 2 (gases, liquefied gases, dissolved gases, liquids) with steam saturation pressure > 0.5 bar g at maximum temperature
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