Large diameter flat hose

The flat-coiled high-pressure water and oil delivery hose adopts one-time forming and co-extrusion process. It consists of TPU inner rubber layer, fiber reinforced braided layer and TPU outer rubber layer. The conductive metal wire is added to the fiber braid to solve the problem of the hose. The static electricity generated during the oil transportation process fully guarantees the safety of oil transportation and the high efficiency of transportation efficiency. It can transport gas, water, oil and other media without pollution to the transportation medium.

Technical indicators of large-caliber flat hose performance

Item                                                                       Inner rubber layer   Outer rubber layer

Tensile strength,MPa≥                                                     20                              20

Elongation at break,% ≥                                                  350                            350

Determine air aging performance(70℃士2℃×168h)                           

Tensile strength retention rate,%≥                                                                     80

Retention rate of elongation at break,% ≥                                                         80

Performance after receiving liquid

Tensile strength retention rate,%≥                                   70                              70

Retention rate of elongation at break，%≥                     70                               70

Volume expansion,% ≤                                                     40                               70

Performance after immersion in water (23℃±2℃X14d)                

Tensile strength retention rate,%≥                                   70                               70

Retention rate of elongation at break,% ≥                       70                               70

Brittleness temperature,℃≤                                             -55                             -55

Acid and alkali resistance 

Tensile strength retention rate,%≥                                   70                                70

Retention rate of elongation at break,%二                       70                                70

Volume expansion degree,%≤                                          40                                40

Static electricity

The oil delivery hose is woven into a continuous conductive wire. The static conductive wire ensures that the two joints of the hose are in a conductive state, and the maximum resistance value is not more than 50/s. When the hose is wound, folded, and bears the internal pressure specified by the specification, the hose is guaranteed to be always on.

Original interlayer adhesion strength

The original interlayer bonding strength between the inner rubber layer, outer rubber layer and reinforcement layer of the hose is not less than 45N/25mm.

Adhesive strength between layers after immersion in liquid

After being immersed in liquid, the interlayer bonding strength between the inner rubber layer, outer rubber layer and reinforcement layer of the hose is not less than 27N/25mm.

proper temperature

When used under the conditions of -40℃~70℃, the hose has no cracks, adhesion, etc., and the oil delivery hose should always be connected.

Oil pollution resistance

When the hose is used to transport oils that need to control the gum content, the test solution is clear and translucent after being filled with liquid, and there is no suspended matter and other impurities. After the test, the washing gum content of the test solution is not more than 6mg/100ml.

Hydraulic performance

The test pressure and minimum burst pressure of the hose should meet the requirements. Under the test pressure, the hose should have no leakage, obvious deformation, etc. The pipe blasting shall be longitudinal blasting. Under the design working pressure, the hose length change rate should not be more than 2%, and the diameter expansion rate should not be more than 7%. Looking at the direction of the water flow, the hose should not be twisted counterclockwise.

Waterproof pollution

Meet the requirements of GB/T17219 safety evaluation standards.

UV resistance

Observed under a 2x magnifying glass, there is no cracking in the outer rubber layer of the hose.

Ozone resistance

Under the conditions of an ozone concentration of 50×10 and a test temperature of 40°C ± 2°C, after 72 hours, it was observed with a 7-fold magnifying glass. There was no cracking in the outer rubber layer of the hose.

Abrasion resistance

Use H-22 grinding wheel, without additional weight, the grinding wheel revolution when the reinforcement layer is exposed is not less than 250,000 revolutions.

Scratch resistance

The number of tool cycles when the hose used for ship-to-ship oil or shore-to-ship oil and water is scratched and leaked is not less than 7000.

Longitudinal breaking strength

Cut three sample tubes with a length of 400mm, clamp both ends of the hose with a suitable clamp, and test the longitudinal breaking strength of the hose on a tensile machine. Take the average value as the test result, and any test result meets the specification requirements. Logo

Clear product identification should be printed on both ends of the hose. The content should include the product name, specification model, single length, production date, product number, name of the manufacturing unit, and the options are whether to conduct static electricity, conveying medium, name of research unit The name of the supervisory unit.

colour

The outer wall color of the hose is recommended to be red or black, others can be customized according to customer requirements.

Appearance Quality

The hose should have uniform wall thickness, clear signs, smooth and flat surface, and no defects such as pinholes, bubbles, protrusions, inclusions, etc.

The interface and the hose are connected under the water pressure test, and there is no leakage, blasting or slippage at the connection of the interface and the hose.