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Address: Room 1920, Building 3, Excellence Century Center, Shibei District, Qingdao, Shandong, China
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Qingdao Henger Shipping Supply Co., Ltd |
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ISO14409 Cargo Salvage Sunken Boats Ships Lifting Floating Marine Equipment Rubber Airbag Supplier
Marine rubber airbag are mainly applied to ship launching and landing, weight lifting, handling, installation of underwater buoyancy aid etc. Production compared with the ISO14409. We are the manufacturer of airbag for more than 17 years which be certificated by DNV.GL, BV, CCS, LR.. Our airbags uses superior technology and components, therefore with long service year and high carrying capacity. And our advanced technology, sophisticated production, to ensure product quality and customers’ interests. For different requirements of customers, we can provide products with different diameters, lengths and layers.
Usage
Features of our Marine Rubber Airbag:
Fully compliant with ISO 14409 standard, manufacture with mould, difference with traditional hand-make product.
High bearing capacity
High resistance to knead ability
The new structure design of accounts attné'end
Optimization of structural layout
Durable anti-aging abilities and wear characteristics
Higher flexibility and shock absorption ability
The cord laryers we produced are using polyamide fibre, 3 ply which can extend the airbags' life.
Material of rubber requirement
| No. | Test Item | Required | Test Method |
| 1 | Tensile strength, MPa | ≥18 | ISO 37 |
| 2 | Elongation at break,% | ≥400 | ISO 37 |
| 3 | Hardness, *(Shore A) | 60±10 | ISO 7619-1 |
| 4 | Tear strength, N/cm | ≥400 | ISO 34-1 |
| 5 | Compression set, %(70°C ± 1°C, 22h) | ≤30 | ISO 815-1 |
| 6 | After thermal ageing at 70°C ± 1°C, 96h⇒Holding of pull lengthening, % | ≥80 | ISO 188 |
| 7 | After thermal ageing at 70°C ± 1°C, 96h⇒Holding of elongation at break, % | ≥80 | ISO 188 |
| 8 | After thermal ageing at 70°C ± 1°C, 96h⇒Change of hardness, *(Shore A) | ≤8 | ISO 7619-1 |
| 9 | Static ozone ageing at 40°C × 96h [ozone concentration (50 ± 5) × 10‾8], extension 20% | No crack | ISO 1431-1 |
Airbag of repair
Marine rubber airbag small damage occurred. as long as no serious damage is cracked and aging (Surface without cracking and tacky), ail can undertake repair. Recommend using thermal sulfide method, process is introduced.
1.Clean airbag surface
Rinse airbag, make internal and external surface cleaning, don't nave sediment, dirt and oil dry surface. When the balloon in water,leaning, notice the soaking time, no more than 10 minutes.
2.Laid Soak glue Twill Fabrics
Laid Soak glue Twill Fabrics Refers to enhance fiber (known as Tire cord) surface coating coated the Raw rubber. Use the repair airbag Soak glue Twill Fabrics the original material should be consistent with the material factory (according to the customer request can provide the same material Soak glue Twill Fabrics), the Twill Fabrics Within the body wall with airbag wiring Angle for same.Laying methods depending on different forms of break age. The damage form can generally be divided into longitudinal cracks ( Crack length direction along the airbag extension), Transverse crack( Cracks along the circumference direction outspread). Nail eye ( Including the shape10cm diameter less damage Proceed as follows
(1)Mark the scope of repair course out as the bound to polish lace .To expand the scope of repair course around the crack to avoid the crack out of sight .The extended range has to depend on the type air bag and extend of damage ,usually 5 for 22~24cm;6 for 24~26cm;7for 26~28cm;8 for 28~30cm.
Polish the face needed to repair till show the fibre ,but don't damage the fibre.
(3 )For the longer crack ,it has to be sewed with cord fabric,note that the pinhole is far from the crack around 2~3cm, the space between pinhole is around 10cm.
(4)Clean the face needed to repair with petrol ,then air it dry.
(5)Brushing the glue paste on it .The glue is soaked in petrol,then become the glue paste .The proportion of glue and petrol is1:5.When brush the first layer ,thin mixture is better(The proportion of glue and petrol is 1:8).After airing dry the first layer ,brush the thick mixture and air dry it.
(6)Seal the crack with the unripe glue strip that is 1mm thickness and more than 1cm width.
(7)Brush the petrol on it ,and air dry it.
(8)Regarding longitudinal cracks . Uses widely first aproximate10 cm wide immerse glue cord fibre cloth perpendicular to the direction. of crack applied layer (see chart 9a) . For horizontal cracks and eye can be directly on the (10) step operating
(9)Brush again cold dry gas
(10)Lengthwise parallel to put a layer of hanging among. Around the crack of overlapped range should be greater than 5cm, and around to clip round (see chart 9b)
(11)Brush again cold dry gas
(12)Lay a layer of oblique hanged among tire cord direction should
be within the bursa wall and oblique tire cord (or enhance fiber) in the same direction. The scope of overlapped around than previous level among big 1cm, hang around and round to clip (see chart 9c).
(13)Brush again cold dry gas
(14)More inclined to put a layer of hanging among. Tire cord longitudinal axis parallel with the Angle and a vertical axis parallel tire cord and the direction of rotation Angle, but equally (if a contrary to 30degrees counterclockwise rotation, this layer is 30 degrees counter clockwise chart 9d ) around the scope of overlapped than a hanging among 1cm again big,round and round to clip.
(15) Brush again cold dry gas
(16) Lengthwise perpendicular to the layer corporation -the hung.The scope of overlapped around a hanging than among 1cm again big, round and round to clip.
(17) Compaction layer, the layer between the air out and clean.
(18) At last one hang around among besmear again, and gasoline,wide 2cm thick 1mm 3cm - born strip the edge sealing up (see chart2ld).
3. The thermal curing
General shipyard can be used as shown in the figure 10 simple working platform. On the platform of a door frame, and the switch-board, car inner void sandbags (available with sand, jack and replace)heating. The heating plate thickness and width for 0.4 mm mm, pour into fillet around iron. The interface edge with airbag will fall into the arc.
Will stay vulcanization airbag repair parts according to the center of alignment. Also will use thermometer measurement sizzling heat, iron temperature. When the temperature rise to 150±5°C, and can be taken down on cotton pad iron, alignment, jack sulfide (O.6 MPa pressure), with iron slowly cooling, vulcanization process can complete (curing time 4O minutes). If a wound,exceed big sulfide heating plate, limit the effective length of fluidized center, again in order to both sides sulfide. In iron, heating sulfide in previous 15mm overlap
4. Inspection
Check whether the place repair adhesive close-grained, don't allow internal bubble, debonded or spongy etc. The new gum heating area are not permitted aging chap, owe sulfur or sulfur phenomenon.After the inspection for external pressure test, test pressure from the pressure of work.
Warning: After repair damaged area, should reduce the air pressure of work
5. Repair
To ensure the safety airbag, have one of following cases should repair:
1.From the date of original shipment, more than 8 years or more.
2.Serious violation of regulations, use the work stress than guarantee blasting.
3.Seriously damaged, such as air horizontal crack length than circumference 1/3, longitudinal cracks generated more than 2m or cross damage fracture.
4.Surface is serious, chap, ageing has decayed tacky, cord.
