ABSOLUTELY RELIABLE MEDIA SEPARATION BEST HEAT TRANSFER | SAFE | EFFICIENT

GEWA-safe tubes

2018

.02.

06_P

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n_R

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SK

_(G

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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 andreas.moritz@wieland.com

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

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