Tiếng Việt
Rubber oil tank (K28)
Factory Z175/General Department of Defense Industry has successfully researched and manufactured many lines of soft oil tank products for different types of aircraft equipment to meet the usage requirements of units in the Army. Unlike traditional oil tanks made of metal, fuel tanks for aircraft such as UAVs, K28, K-32 helicopters, SU, AH aircraft…
1. Rubber material standards
| No. | Indicator name | Đvt | Value | Inspection method |
| 1 | Hardness | Shore A | 60±5 | TCVN
1595-1:2013 |
| 2 | Tensile strength | MPa | 17 | TCVN 4509:2020 |
| 3 | Elongation at break | % | 550 | TCVN 4509:2020 |
| 4 | Elongation | % | 25 | TCVN 4509:2020 |
| 5 | Aging coefficient at 100oC after 72 hours | – | 0,6 | TCVN 2229:2013 |
| 6 | Change in elongation at break when aging in air at 100oC for 24 hours | % | 40 | TCVN 4509:2020 |
| 7 | Weight change after immersion in TC-1 oil after 24h at ambient temperature | % | 2 | TCVN 2752:2017 |
| 8 | Change in weight after 24 hours at 20oC when soaked in a mixture of gasoline and toluene ratio 3:1 (by volume %) | % | 14 | TCVN 2752:2017 |
2. Material standards
| TT | Name of the category of assessment standards | Unit | Regulation level | Inspection method |
| 1 | Fabric type | – | Cotton | |
| 2 | Specific gravity | g/m2 | 330 | TCVN 8042:2009 |
| 3 | Thickness | mm | 0,8 ±0,1 | TCVN 5071:2007 |
| 4 | Weft density | sợi/ 10cm | 130 ±20 | TCVN 1753:2008 |
| 5 | Warp yarn density | sợi/ 10cm | 190 ±20 | |
| 6 | Longitudinal tensile strength | kgf/5cm | 80 | TCVN 1754:2008 |
| 7 | Horizontal tensile strength | kgf/5cm | 75 | |
| 8 | Longitudinal elongation | % | 15 | |
| 9 | Horizontal elongation at break | % | 15 |
3. Product standards
| TT | Name of the inspection target | Specifications |
| 1 | Structure and geometric dimensions, position of flanges and lugs of the tank | Meets requirements according to drawings |
| 2 | Insert the tank into the tester’s storage compartment | The tank is easy to assemble, hugging tightly to the compartment wall. The lugs and flanges are in the correct position, the tank surface is flat without wrinkles or folds |
| 3 | Check air tightness: Put the barrel into a closed test cage, seal the flanges, slowly pump compressed air until it reaches a pressure of P = 0.02 MPa, maintain pressure for 15 minutes | The tank has no air leaks |
| 4 | Check the tightness in oil TC1: Put the tank into a closed test cage, seal the flanges, fill the tank with oil to reach 95% of the volume, soak for 24 hours then inject compressed air until reaching pressure P= 0.02 MPa holds for 15 minutes | The Tank has no oil seepage |
| 5 | Change in weight before and after soaking in TC-1 oil at normal temperature, | 2%< |
| 6 | (For TDM types for UAVs) Total volume of dirt in the fuel when contained in TDM | Not greater than 1mg/l; according to MIL STD 3004, DEF STAN 91-91 standards |
Reviews
There are no reviews yet.