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Heavy Lifting and Conveying

Evergreen Marine Airbags for Heavy Lifting and Conveying
                                                       --- Ev
ergreen Heavy Lift Pneumatic Rollers (Rolling Airbags) 

"The Neccessary Equipments of Salvage Company"
"Appointed Pneumatic Roller Supplier of American Salvage Association's Members" 

>> Marine Airbags Achievement (or visit our Press Release)
>> Welcome visit new website www.evergreenmaritime.com

Evergreen is the inventor of first Marine Airbags, and sets the standard in the industry for high performance and usage technology. Now, Evergreen Marine Airbags are widely used in ship launching and landing, sunken ships salvage and refloatation, heavy lifting and conveying, heavy caisson or structure relocation.

Ship launching or upgrading depending on Evergreen Marine Airbag is an innovative technology having utmost bright prospect in shipbuilding. Now the Flexible Launching Technology is full of mobility, with advantages such as saving effort, saving time, saving work load, saving investment, flexible, safe, reliable, and outstanding benefit, etc. The technology of apply Evergreen Airbags to the launching and landing of ships overcomes the restrictions of traditional slide board technology which is commonly used in building small or medium size ships.

Evergreen Heavy Lift Pneumatic Rollers (Airbags) will provide you with a unique capability of land transport very large vessels, heavy loads or heavy construction over ground where terrain would otherwise prevent such an operation. The Evergreen have wide Heavy Lift Pneumatic Rolling Airbags in capacities from 70 tons to 380 tons per bag. Evergreen also has a selection of bags with diameters up to 2m in diameter and up to 20m in length to cover virtually all applications.

The current over ground transportation capacity is 10,000 tons.

The deflated Evergreen Heavy Lift Pneumatic Rollers (Airbags) are very flat and can be placed under a grounded or stranded vessel which is hard aground. In a shipyard transportation or launching application as little as 12 inches will provide very quick placement of the Evergreen Heavy Lift Pneumatic Rolling Airbags under a hull. The Evergreen Heavy Lift Pneumatic Rollers (Airbags) operate with very low pressure, 7 – 10 PSI, which is controlled by a custom EVEGREEN designed air manifold which can operate all Evergreen Heavy Lift Pneumatic Rollers (Airbags) simultaneously or individually.

EVERGREEN also provides necessary air compressors, manifold, hoses, support equipment and expertise with all air bag operations.

Construction Features:

Evergreen Heavy Lift Pneumatic Rollers (Airbags) , basic body consists of which consist of our rubber layers, synthetic-cord-reinforced rubber layers, are kind of a cylindrical airbags with hemispherical heads at the both ends. All of these are vulcanized together, and then compress air inside to enable in to roll.

Evergreen Heavy Lift Pneumatic Roller (Airbags)

1. Outer Rubber
The outer rubber layer that covers the outside of launching airbags protects the cord layers from abrasion and other external forces. This compound has sufficient tensile and tear strength to withstand any weather condition and hard usage. Standard color is black.

2. Synthetic-tyre-cord layer for reinforcement
The reinforcement cord layers, which are made of Synthetic-tire-cord commonly used in tires, are arranged at ideal angles to hold the internal pressure and to distribute the stress evenly providing strong efficient reinforcement.
(To know the detailed technology parameter, please refer Material Selection.)caissons launching by Ail lift bags

3. End Fittings
End fittings include air tightness swivel and airbags safety air inlet.

Classification:

1. The standard specification of Evergreen Airbags

You can choose the required diameter and effective length to meet your projects.
 Diameter (D)          : It’s from 0.8m to 2.0m.
 Effective Length (EL)   : It’s from 6m to 18m.
 Total Length (TL)      : It’s from 7m to 19.5m
The above specification only is our standard specification arrange. Other specification also can be supplied upon clients’ request.

2. The standard number of layers
We define the number of layer, which means the number of Synthetic-tyre-cord layer, in order to confirm the Safety Working Pressure. Normally, our airbags include 4, 5, 6, 7, 8 layers types. Other type is available upon clients’ request.

3. The material of Evergreen Airbags

There’re two kinds of synthetic-tire-cord because of the different performance.

Item

Unit

1260 dtex/2

1870 dtex/2

Break Strength

N/ strand

≥ 215.6

≥ 284.2

Diameter

mm

0.65 ± 0.05

0.74 ± 0,05

Adhesion Strength

N/cm

≤ 137.2

≤ 156.8

Heavy Lifting and Moving by Airbags

We define the suitable Evergreen Airbags as per the above 3 items.
Such as: Evergreen Airbags D1.5m x EL 15m YT-6, 1400D
In here:
1. D 1.5m: the diameter is 1.5m
2. EL 15m: the effective length is 15m
3. YT-6: the number of Synthetic-tire-cord layer is 6 layers
4. 1400D: the type of Synthetic-tire-cord layer is 1400

Features and Advantages:

l        Unique whole enlacing technology
l        Excellent material selection as per ISO 17357Heaving Lifting and Moving by Airbags
l        Cost effective, long service life
l        Guaranteed quality and safety
l        Free consult and design project
l        Laboratory and field test
l        Commission and technical directing service
l        Well proven design and performance
l        0.7 Mpa hydraulic blasting utmost
l        After service for lifetime

Performance Table:

Performance table for YT-6 layer type Evergreen Heavy Lift Pneumatic Rollers (Airbags).
For more information about YT-4, YT-5, YT-7, and YT-8, please feel free to contact us.

Diameter

Working Pressure

Working Height

Guaranteed Bearing Capacity

per Unit Length

kN/m

t/m

lb/ft

D=1.0m
(D=3.28 ft)

0.20 Mpa
(29.01 psi)

0.6m (1.968 ft)

125.76

12.82

8617

0.5m (1.640 ft)

157.16

16.02

10768

0.4m (1.312 ft)

188.65

19.23

12925

0.3m (0.984 ft)

220.04

22.43

15076

0.2m (0.656 ft)

251.53

25.64

17233

D=1.2m
(D=3.94 ft)

0.17 Mpa
(24.66 psi)

0.7m (2.296 ft)

133.61

13.62

9154

0.6m (1.968 ft)

160.3

16.34

10983

0.5m (1.640 ft)

187.08

19.07

12818

0.4m (1.312 ft)

213.76

21.79

14646

D=1.5m
(D=4.92 ft)

0.13 Mpa
(18.85 psi)

0.9m (2.952 ft)

122.63

12.51

8402

0.8m (2.624 ft)

143.03

14.58

9800

0.7m (2.296 ft)

163.43

16.66

11198

0.6m (1.968 ft)

183.94

18.75

12602

0.5m (1.640 ft)

204.34

20.83

14000

0.4m (1.312 ft)

224.75

22.91

15398

D=1.8m
(D=5.90 ft)

0.11 Mpa
(15.95 psi)

1.1m (3.608 ft)

120.96

12.33

8287

1.0m (3.280 ft)

138.22

14.09

9470

0.9m (2.952 ft)

155.59

15.86

10660

0.8m (2.624 ft)

172.85

17.62

11843

0.7m (2.296 ft)

190.22

19.39

13033

0.6m (1.968 ft)

207.48

21.15

14216

0.5m (1.640 ft)

224.75

22.91

15398

0.4m (1.312 ft)

242.01

24.67

16581

D=2.0m
(D=6.5)

0.10 Mpa
(14.5 psi)

1.2 m (3.936 ft)

125.76

12.82

8617

1.1 m (3.608 ft)

141.46

12.42

8246

1.0 m (3.280 ft)

157.16

16.02

10765

0.9 m (2.952 ft)

172.85

17.62

11841

0.8 m (2.624 ft)

188.64

19.23

12923

Testing and Quality:

Evergreen Management System is certified ISO 9001-2000 and follows each order during manufacturing procedures. Evergreen guarantees high standards and performances of all products. Customer requirements are strictly followed during all production phases. Evergreen relevant departments assure a procurement control on the raw and basic materials. All material of Evergreen Airbags are selected in accordance with CB/T 3795.

Evergreen are very focused on the quality. We invest advanced inspection equipment.  100% airbags should be tested and inspected as per the requirement of CB/T 3795. Non conformed products are immediately rejected by Quality Control. The widely usage have been tested under rough condition. Our many satisfied customers are out best reference.

Evergreen welcomes inspection by its customer’s quality assurance departments and to their appointed agencies as CCS, Lloyd’s, DNV, or ABS.

To understand the whole Heavy Lifting / Caisson Launching process, please refer our video clips, or download our launching videos from www.qingdaoyongtai.com/video.rar.

 >>PROVEN IN PRACTICE

Please visit
Technology to get more information about the design and engineering of marine airbags.

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