Vacuum Insulated Pipe
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Vacuum Insulated Pipe

VACUUM INSULATED PIPE

Vacuum insulated pipe, also called VIP, is used to transfer cryogenic liquids, such as LHe, LN2, LH2, LAr, LNG, etc. To minimize heat transfer and realize the efficient and cost-effective transfer of cryogenic liquids, VIP is double-walled. The inner pipe carries the cryogenic liquid. It is wrapped with multiple layers of super insulation and a non-conductive spacer. This creates a space between the two pipes that is “pumped down” using a vacuum pump to create a static vacuum shield. In addition to the insulation material, the getter material will further maintain and protect the vacuum. Compared with traditional cryogenic fluid transfer line, the heat leakage value of VIP is only 0.05~0.035 times of traditional one’s. VIP can significantly save energy and cost for customers. So VIPs are extensively applied in air separation, gases, aviation, electronics, superconductor, chips, automation assembly, food & beverage, pharmacy, hospital, biobank, rubber, new material manufacturing chemical engineering, iron & steel, and scientific research etc. 

 

 

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Rigid VIP



RIGID VACUUM INSULATED PIPE

Each section of rigid VIP is constructed of a rigid inner and outer pipe. Generally, there are three connection types between pipes. When VIP need be connected to equipment, storage tank and so on, the connection joint can be customized according to customer requirements.

 

 

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SPECIFICATIONS

Design temperature

-270℃~90℃

Ambient temperature

-50℃~90℃

Medium

LO2, LHe, LN2, LH2, LAr, LG, LNG, etc.

Insulation

High vacuum & multi-layer insulation

Vacuum leakage

≤1X10-10Pa*m3/S

Vacuum

≤4.0X10-3Pa

Material

Stainless steel

Applicable standards

EN13408, ASME B31.3. Other code upon request

 

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TYPE OF CONNECTION

1

1

Bayonet connection with clamps

1

1

Bayonet connection with flanges and bolts

1

1

Welded connection

Nominal diameter of inner pipe

DN10(3/8”)-DN25(1”)

DN10(3/8”)-DN80(3”)

DN10(3/8”)-DN500(20”)

Design pressure

≤8 bar

≤16 bar

≤64 bar

Standard length

8 meter/pcs or customized

Material

As client requested

 

RVIP FLOW RATE

Line size

gpm

Ipm

Ibs/min

1/2” (DN15)

7.66

29

51

1” (DN25)

29.6

112

199

2” (DN50)

159

602

1,072

3” (DN80)

441

1,669

2,975

4” (DN100)

890

3,369

6,004

6” (DN150)

2,417

9,149

16,307

8” (DN200)

4,883

18,484

32,945

10” (DN250)

8,740

33,084

58,967

12” (DN300)

13,700

51,860

92,432

16” (DN400)

27,700

104,855

166,477

20” (DN500)

58,950

223,150

354,289

Date based on:

1, Maxi. recommended flow rate.

2, 100 feet of rigid piping while maintaining less than 5 psi friction pressure drop @ 60 psi operating pressure.

 

 

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VIP HEAT LEAK (Btu/hr*ft)

Line size

LNG

LOX

LN2

LH2

LHe

1/2” (DN15)

0.199(0.05)

0.222(0.06)

0.236(0.06)

0.298 (0.08)

0.272 (0.07)

1” (DN25)

0.290(0.08)

0.324(0.09)

0.344(0.10)

0.434 (0.12)

0.394 (0.11)

2” (DN50)

0.490(0.14)

0.547(0.16)

0.445(0.13)

0.734 (0.21)

0.659 (0.19)

3” (DN80)

0.704(0.20)

0.785(0.23)

0.834(0.24)

1.053 (0.30)

0.942 (0.27)

4” (DN100)

0.892(0.26)

0.996(0.29)

1.058(0.31)

1.336 (0.39)

1.192 (0.34)

6” (DN150)

1.296(0.37)

1.446(0.42)

1.537(0.45)

1.940 (0.56)

1.727 (0.50)

8” (DN200)

1.673(0.49)

1.867(0.54)

1.984(0.58)

2.504 (0.73)

2.226 (0.65)

10” (DN250)

2.078(0.60)

2.319(0.67)

2.464(0.72)

3.110 (0.91)

2.762 (0.80)

12” (DN300)

2.431(0.71)

2.714(0.79)

2.884(0.84)

3.640 (1.06)

3.236 (0.94)

16” (DN400)

2.760(0.86)

3.015(0.88)

3.456(1.01)

4.236(1.24)

3.818(1.12)

20” (DN500)

3.045(0.95)

3.415(1.02)

4.015(1.18)

4.815(1.42)

4.465(1.31)

Date is provided for estimation only.

1, Date based on straight pipe only (no internal spacers, fittings, or bayonets).

2, For system estimates with average components, increase per foot data by 20%.

 

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Flexible VIP



FLEXIBLE VACUUM INSULATED PIPE

Flexible VIP is an indispensable tool for the safe, efficient, and economical transfer of cryogenic liquids. Compared with rigid VIP, it has good bending ability and can meet the installation requirements of various site conditions. Our flexible VIP has applications in laboratory, industrial, instrumentation or fueling.

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SPECIFICATIONS

Design temperature

-270℃~90℃

Ambient temperature

-50℃~90℃

Medium

LO2, LHe, LN2, LH2, LAr, LG, LNG, etc.

Insulation

High vacuum & multi-layer insulation

Vacuum leakage

≤1X10-10Pa*m3/S

Vacuum

≤4.0X10-3Pa

Material

Stainless steel

Adsorbent & Gettering Material

Yes

Test pressure

1.15 times design pressure

Applicable standards

EN13408, ASME B31.3. Other code upon request

 

 

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TYPE OF CONNECTION

1

1

Bayonet connection with clamps

1

1

Bayonet connection with flanges and bolts

1

1

Welded connection

Nominal diameter of inner pipe

Bayonet with clamps

DN10(3/8”)-DN25(1”)

Bayonet with flanges and bolts

DN10(3/8”)-DN80(3”)

Welded connection

DN10(3/8”)-DN150(6”)

Design pressure

≤8 bar

≤16 bar

≤40 bar

Standard length

Customized

Material

As client requested

 

 

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FVIP FLOW RATE

Line size

gpm

Ipm

Ibs/min

3/8” (DN8)

4.78

18

32

1/2” (DN15)

5.88

22.2

39.3

3/4” (DN20)

6.82

25.8

46

1” (DN25)

12.4

46.9

83

1-1/4” (DN32)

26.3

99.6

177

1-1/2” (DN40)

67.8

256.6

454.2

2” (DN50)

90.4

342

610

2-1/2” (DN65)

190.6

721.4

1,277.02

3” (DN80)

400.6

1,516.4

2,684.02

4” (DN100)

900.8

3,409.8

6,035.36

5” (DN125)

1,600

6,056.6

10,720

6” (DN150)

5,000

18,927.1

33,500

Date based on:

1, Maxi. recommended flow rate.

2, 100 feet of rigid piping while maintaining less than 5 psi friction pressure drop @ 60 psi operating pressure.

 

 

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