EN 853 ST high pressure hydraulic hose
Behind the powerful excavation of excavators, precise hoisting of cranes, and continuous conveying of concrete pump trucks, there is a key component silently undertaking the stable transmission of high-pressure hydraulic oil — that is the EN 853 ST steel braided hydraulic hose. As an authoritative standard product issued by the European Committee for Standardization (CEN), the EN 853 ST series hoses have become the connector for high-pressure hydraulic systems such as construction machinery, mining equipment, and offshore platforms, relying on their excellent pressure resistance, weather resistance and reliable joint sealing. LETONE Technology will detailedly analyze the standard definition, structural characteristics, key parameters and selection points of LETONE EN 853 ST hydraulic hoses, helping you choose a suitable hydraulic transmission solution for your equipment.
1. Standard and Model Analysis of EN 853 ST Hydraulic Hoses
EN 853 is a steel braided hydraulic hose standard issued by the European Committee for Standardization (CEN), with the current version being 2015. This standard strictly regulates key indicators such as the size, pressure level and pulse performance of hoses, ensuring the versatility and reliability of products worldwide.
In the EN 853 standard system, the ST series is an important branch different from the SN series (thin outer rubber layer, suitable for specific joints). The ST series adopts a standard-thickness outer rubber layer design, which has stronger wear resistance and weather resistance, making it more suitable for long-term use under complex working conditions. The ST series is mainly divided into two models:
1ST: Single-layer high-strength steel wire braided structure, suitable for medium-pressure hydraulic systems, burst pressure ≥4 times the working pressure;
2ST: Double-layer alternating steel wire braided structure, suitable for high-pressure hydraulic systems, burst pressure is also ≥4 times the working pressure, with sufficient safety margin.
Both 1ST and 2ST, EN 853 ST hydraulic hoses are based on a rigorous standard system, providing stable and reliable fluid transmission guarantee for various hydraulic equipment.
2. Core Structural Characteristics of EN 853 ST Hydraulic Hoses
The excellent performance of EN 853 ST hydraulic hoses comes from their three-layer precision composite structure design:
1. Inner Rubber Layer: Oil-resistant synthetic rubber, ensuring medium compatibility
The inner rubber layer is made of nitrile rubber (NBR) or hydrogenated nitrile rubber (HNBR), which has excellent resistance to mineral oil, synthetic hydraulic oil and water-glycol. The smooth inner wall design effectively reduces flow resistance and energy loss. The temperature adaptation range covers -40℃ to 100℃, which can meet the working conditions of most hydraulic systems; if the medium is water-based hydraulic fluid, it is recommended to use it within 70℃.
2. Reinforcement Layer: High-tensile steel wire braid, anti-pulse and anti-deformation
The reinforcement layer is made of copper-plated or galvanized high-tensile steel wire, 1ST is single-layer precision braided, and 2ST is double-layer alternating braided. This structure ensures uniform tension distribution of the hose when bearing high pressure, which can effectively resist pulse impact and high-frequency vibration in the hydraulic system, avoiding fatigue failure caused by stress concentration.
3. Outer Rubber Layer: Weather-resistant synthetic rubber, adapting to harsh environments
The outer rubber layer is made of neoprene or EPDM rubber, with a black smooth or cloth surface design, which has multiple protective properties such as ozone resistance, UV resistance, wear resistance and oil mist resistance. Whether it is sun and rain in outdoor operations, or wear and collision in mining environments, the outer rubber layer of EN 853 ST hydraulic hoses can effectively protect the internal structure and significantly extend the service life.
4. Joints: Precision crimping, reliable sealing
Both ends of the hose can be adapted to carbon steel or stainless steel hydraulic joints, using precision crimping technology to ensure firm connection and reliable sealing. The joint interface complies with international standards such as ISO 8434 and SAE J518, and can be directly matched with various hydraulic equipment, fundamentally eliminating the risk of leakage and falling off under high-pressure working conditions.
3. Key Parameters and Applicable Working Conditions of EN 853 ST Hydraulic Hoses
EN 853 ST hydraulic hoses are adapted to differentiated application scenarios according to different models. The key parameters are compared as follows:
|
Model
|
Structure
|
Applicable Pressure
|
Applicable Scenarios
|
|---|---|---|---|
|
1ST
|
Single-layer steel wire braid
|
Medium pressure
|
Small and medium-sized construction machinery, machine tools, forklifts
|
|
2ST
|
Double-layer alternating steel wire braid
|
High pressure
|
Excavators, cranes, concrete pump trucks, mining equipment, offshore platforms
|
Other key parameters:
Caliber range: Nominal inner diameter 5~51 mm, covering the diverse needs from small equipment to large-scale equipment;
Safety factor: 4:1 (mandatory requirement of EN 853 standard) to ensure safe use;
Small bending radius: Different according to the pipe diameter and number of layers, the 2ST series is slightly larger than the 1ST series, which is convenient for flexible arrangement in the narrow space of equipment.
4. Core Advantages and Service Guarantee of LETONE EN 853 ST Hydraulic Hoses
Choosing LETONE EN 853 ST hydraulic hoses means choosing multiple guarantees of compliance certification, excellent quality and full-service support.
1. Compliance and Process Advantages
The entire LETONE EN 853 ST series has passed EN 853:2015 and ISO 1436 dual certifications, adopting imported raw materials and advanced Italian braiding equipment, and the automated production line ensures product consistency. Tests show that the pulse life of LETONE hydraulic hoses exceeds 1 million times, which is more than 30% longer than ordinary products, significantly reducing equipment maintenance costs.
2. Quality Assurance Commitment
Regular products enjoy a 1-year warranty;
High-end customized products can enjoy a 2-3 year warranty;
For damages caused by non-human factors and non-overworking conditions, free replacement is available and round-trip logistics costs are borne.
3. Comprehensive Services
Pre-sales: Professional team provides working condition selection support, supporting customization of caliber and length;
In-sales: Provide crimping parameter guidance and installation technical support;
After-sales: 24-hour response, on-site technical support within 48 hours, sufficient stock reserves to meet emergency needs.
5. Selection and Procurement Points of EN 853 ST Hydraulic Hoses
To ensure that EN 853 ST hydraulic hoses perform well in your equipment, please focus on the following points during procurement and selection:
1. Clarify the pressure level: According to the system working pressure, reserve a 1.3 times safety margin, and reasonably select 1ST (medium pressure) or 2ST (high pressure) model;
2. Confirm the medium type: Distinguish between mineral oil, water-based hydraulic fluid or synthetic oil to avoid accelerated aging of the inner rubber layer due to incompatible medium;
3. Evaluate the use environment: For outdoor operations, it is recommended to choose an UV-resistant outer rubber layer; for marine environments, priority should be given to salt spray corrosion resistance;
4. Request qualification documents: When purchasing, be sure to ask the supplier to provide key documents such as EN 853 compliance certificate, pulse test report and material certificate;
5. Standardize use and maintenance: It is strictly prohibited to use beyond pressure, temperature and excessive bending. Regularly check whether the outer layer of the hose has cracks, bulges or leakage, and eliminate potential safety hazards in time.
Leave a Message