High pressure hose is a pipeline used for conveying petroleum based liquids (such as mineral oil, soluble oil, hydraulic oil, fuel oil, lubricating oil) and water-based liquids (such as emulsions, oil-water emulsions, water) with certain pressure and temperature, as well as liquid transmission, in mining hydraulic supports, oilfield development, engineering construction, lifting and transportation, metallurgical forging, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools, and mechanized and automated hydraulic systems in various industrial sectors.

High pressure hoses are mainly divided into high-pressure steel wire braided hoses and high-pressure steel wire wound hoses according to the production process:

Steel wire braided hose:
The structure of high-pressure steel wire braided hose mainly consists of a liquid resistant synthetic rubber inner layer, a middle layer, layers I, II, and III of steel wire braided layers, and a weather resistant synthetic rubber outer layer.

Steel wire wrapped hose:
The structure of high-pressure steel wire wound hose mainly consists of an inner rubber layer, a middle rubber layer, a four or multi-layer alternating steel wire reinforcement layer, and an outer rubber layer.

The products of wire weaving and wire winding not only differ in technology, but also in specific usage and some specifications and models
1. Steel wire weaving specification range: DN5mm~DN102mm.
Operating temperature: oil -40 ¡æ~100 ¡æ, air -30 ¡æ~50 ¡æ, water lotion+80 ¡æ or less. Generally applied to medium and low voltage environments
2. Specification range of steel wire wound hose: DN6mm~DN305mm, working temperature: -40 ¡æ~120 ¡æ
Commonly suitable for high pressure working conditions, with high resistance to working pressure up to 70-120Mpa. 3. Types of steel wire winding:
4SP type - medium pressure hose wrapped with four layers of steel wire.
4SH type - high-pressure hose wrapped with four layers of steel wire.
R12 type - High temperature and medium pressure oil pipe wrapped with four layers of steel wire under harsh conditions.
R13 type - High temperature and high pressure oil pipe with multi-layer steel wire winding under harsh conditions.
R15 type - High temperature and ultra-high pressure oil pipe with multi-layer steel wire winding under harsh conditions
3. The common execution standards for high-pressure rubber hoses include MT/T98-2006 "Inspection Specification for Hydraulic Support Hoses and hose assemblies"
GB/T3683-2011 "Rubber hoses and hose assemblies - Specification for steel wire braided reinforced hydraulic types for use with oil-based or water-based fluids", "Inspection code for safety signs of mining products", GB/T10544-2013 "Hydraulic rubber hoses and hose assemblies with steel wire wound reinforced outer rubber cover"

Rubber hoses are one of the important connecting components in modern industrial equipment and construction machinery, and their application in hydraulic systems is very common. Regarding the technical advice for selecting high-pressure hoses, the correct selection of hoses is crucial to the normal operation of the entire hydraulic system.