R&D Area

Meaning of Hose (Rubber Hose)

The hose refers to that made of rubber or that composed of cloth covered rubber between fabric strands or inside and outside. Its function is to transport fluid between parts to supply power, coolant, lubricant and fuel to each system.

Role of Reinforced Braid

The reinforced braid inserts the reinforced layer between rubber layers to withstand the pressure when the pressure builds in the hose. Depending on the twisting method and the weaving method, the external quality and the durability performance of the hose increase.

Reinforced Braid Unit

Denier :: The unit of strand thickness. When the strand length is 450m and its weight is 0.05g, it is 1 denier. That is, the strand weight (g) per 9000m is the denier
Ex) For a 9000m long strand, if its weight is 1000g, it is 1000 deniers and if 1,500g, 1500 deniers.

Hose Type

NO	Structure by Product Type	Symbol
1	Total rubber type - single layered hose	1A
2	Inner layer rubber + outer layer rubber - double layered hose	1B
3	Inner layer rubber + reinforcement layer + outer layer rubber - triple layered hose	3A
4	Inner layer rubber + intermediate layer rubber + reinforcement layer + outer layer rubber - quadruple layered hose	3B
5	Inner layer rubber + THV resin layer + outer layer rubber - triple layered resin hose	THV
6	Rubber layer + outer reinforcement layer - double layered outer fabric hose	2A

Test Items by Hose Groups

Item	Cooling System	Fuel System	Braking System
Applicable Hose	- Radiator Hose - Water Hose - Heater Hose - T/Body Hose - Reservoir Hose	- Vapor Hose - Return Hose - Leveling Hose - Feeding Hose - Filler Neck Hose	- Vacuum Booster Hose
Performance Test	1. Bursting pressure 2. Outer diameter variation 3. Air tightness 4. Negative pressure	1. Bursting pressure 2. Outer diameter variation 3. Air tightness 4. Negative pressure	1. Bursting pressure 2. Outer diameter variation 3. Air tightness 4. Negative pressure(negative pressure leak)
Durability Test	pressure+vibration+temperature (antifreeze) FATIGUE & PVT CYCLE	pressure+vibration+temperature (fuel) Vibratory durability & IMPULSE	vibration+temperature HIGH/LOW TEMP TEST
Durable Equipment	Coolant durability tester	Impulse tester or fuel return tester	Vibration durability tester

Item	Steering System	Air System
Applicable Hose	- Power Steering Return Hose - Power Steering Suction Hose	- ENG Vacuum - PCV&Breather Hose - DPF Hose - I/Cooler Hose
Performance Test	1. Bursting pressure 2. Outer diameter variation 3. Air tightness 4. Negative pressure	1. Bursting pressure 2. Outer diameter variation 3. Air tightness 4. Negative pressure
Durability Test	pressure+temperature (power steering oil) IMPULSE	pressure+vibration+temperature (AIR) Durability test on the hose and pipe assembly
Durable Equipment	Impulse tester	Intercooler hose tester