ABSOLUTELY RELIABLE MEDIA SEPARATION BEST HEAT TRANSFER | SAFE | EFFICIENT
GEWA-safe tubes
2018
.02.
06_P
R_e
n_R
_Sc_
0_G
SK
_(G
SK
/Ri)
inINNOVATIVE SPIRIT. OUTSTANDING RESULTS.
WIELAND-THERMALSOLUTIONS.COM
This printed matter is not subject to revision. No claims can be derived from it unless there is evidence of intent or gross negligence. The product characteristics are not guaranteed and do not replace our
experts' advice.
For further information please contact
Wieland-Werke AG | BU Thermal SolutionsAndreas MoritzPhone +49 731 944 1017E-mail [email protected]
THERMAL SOLUTIONS
3 4
COMPARISON OF HEAT TRANSFER PERFORMANCE
GEWA-safe plain compared to GEWA-safe finned
GEWA-safe finned
GEWA-safe plain
water velocity in inner tube w [m/s]
0
1,250
0.5 1 1.5 2 2.5
2,500
large variety of materials
inside: plain or with grooves for improved heat transfer
GEWA-safe plain vs. single wall tube
Test conditions:
tube-in-tube measurement, media: annulus space water @ w=1 m/s, inside tube water, dT=10 K, outside diameter=19.05 mm
bonded or loose
leakage paths:longitudial grooves or diamondback structure
outside: plain or enhanced
water velocity in inner tube w [m/s]
heat
tra
nsfe
r p
erfo
rman
ce Q
/m [k
W/m
]
0
1,250
0.5 1 1.5 2 2.5
2,500
Single wall plain GEWA-safe plain
heat
tra
nsfe
r p
erfo
rman
ce Q
/m [k
W/m
]
*other dimensions on request
NO TOLERANCE FOR CROSS-CONTAMINATIONWhether production processes with highly reactive media, the heating or cooling of food, nutrition or tap water – there are applications where there is no tolerance concerning contamination.
ABSOLUTELY RELIABLE SEPARATION OF FLUIDSGEWA-safe tubes are a tube-in-tube solution featuring defined leakage paths in the tube wall.
COMPACT DESIGNGEWA-safe tubes enable a very compact design of safety heat exchangers, reducing material and labour costs as well as heat exchanger footprint.
OUR SERVICES
• Engineered quality | Finely adjusted material and mechanical conditions result in ideal heat transfer.
• Wide material range | Copper, copper-nickel, stainless steel, carbon steel and material combinations, optimized for your application with ideal bonding.
YOUR BENEFITS
• Reliable and safe | Fluid separation due to double wall design with leakage detection.
• Efficient | Excellent heat transfer due to metallic contact without heat transfer fluid.
• Highest system availability | Early leakage detection facilitates scheduled maintenance.
• Compact and economical | More com-pact heat exchanger design, less footprint.
HIGHEST SYSTEM AVAILABILITY, EFFICIENCY AND SAFETY Leakages of inner or outer tube are immediately recognisable and can be fixed as part of scheduled maintenance schemes. The excellent thermal conductivity is a result of the metallic contact between the two tubes and provides superior heat transfer as compared to solutions using heat transfer fluid.
DIFFERENT TYPESDepending on the application, the tubes are available• with either plain or enhanced outside surfaces, • in copper, copper-nickel, carbon and stainless steel as well as
in material combinations, • in either loose or already bonded version.
G E W A - s a f e – D O U B L E - W A L L S A F E T Y T U B E S – S A F E A N D E F F I C I E N T
Tube configuration
- outside: plain or enhanced- inside: plain or with grooves for improved heat transfer - leakage paths: longitudial grooves and diamondback structure
Materials - copper, copper-nickel - stainless steel, carbon steel
Tempers - as drawn / as finned- annealed
Versions - loose- bonded
APPLICATION EXAMPLES
• pre-heating of fuel gas for gas turbines• protection against environmentally harmful substances• transformer oil water cooler • drinking water protection according to EN 1717 in heat-pump systems • heat recovery systems
max. 9,000 mmmax. 29 ft
max. 9,000 mmmax. 29 ft
max. 9,000 mmmax. 29 ft
Min. 0.2 m
m[0.078"]
min. 0.2 m
m[0.078"]
0.078" 2 mm
min. 0.04"
min. 1 m
m
1 mm
Low Finned
Tube 19 fp
i19.05 m
m*
[3/4"]
Plain Tub
e12.70–19.05 m
m*
[1/2"–3/4"]**
min. 1 m
m[0.04"]
min. 1 m
m[0.04"]
1 mm
max. 9,000 mmmax. 29 ft
max. 9,000 mmmax. 29 ft
max. 9,000 mmmax. 29 ft
Min. 0.2 m
m[0.078"]
min. 0.2 m
m[0.078"]
0.078" 2 mm
min. 0.04"
min. 1 m
m
1 mm
Low Finned
Tube 19 fp
i19.05 m
m*
[3/4"]
Plain Tub
e12.70–19.05 m
m*
[1/2"–3/4"]**
min. 1 m
m[0.04"]
min. 1 m
m[0.04"]
1 mm
GEWA-safe plain
GEWA-safe finned
TUBE CONFIGURATIONS
outin