Inner woven rubber hoseAs a widely used conveying medium pipeline in the fields of industry, agriculture, construction, and daily life, its production and manufacturing process requires strict adherence to a series of standards and specifications to ensure the performance, quality, safety, and service life of the product. These standards not only cover material selection, structural design, and production processes, but also include product testing methods, quality control, and environmental requirements. The following are the main standards and detailed analysis that should be followed in the production and manufacturing of internal braided rubber hoses.

1、 Material selection and standards

The main components of an inner braided rubber hose include an inner layer of adhesive, a braided layer, and an outer layer of adhesive. The selection of each material must comply with the corresponding national or industry standards.

1. Inner layer adhesive: The inner layer adhesive directly contacts the conveying medium, so it needs to have good medium resistance, sealing, and wear resistance. Common materials include natural rubber, butyl rubber, and ethylene propylene diene monomer (EPDM). According to standards such as GB/T 5574-2014 "Rubber or Plastic Hydraulic Hoses and Hose Assemblies" and GB/T 3683-2011 "Hydraulic Conveyor Rubber Hoses", the selection of inner layer rubber should consider factors such as the properties of the medium, working pressure, temperature range, and usage environment.

2. Weaving layer: The weaving layer is the core reinforcement structure of the inner braided rubber hose, mainly woven from materials such as steel wire, polyester wire, nylon wire, etc. The selection is based on the pressure resistance, tensile strength, and fatigue resistance of the rubber hose. According to the GB/T 2550-2019 "Braided Rubber Hose" standard, the structure, material, and weaving density of the weaving layer need to be specified in detail to ensure the strength and stability of the rubber hose.

3. Outer layer glue: The outer layer glue mainly serves a protective function, preventing the inner layer glue and weaving layer from being eroded by the external environment. Commonly used materials include chloroprene rubber, styrene butadiene rubber, silicone, etc. According to GB/T 9326-2018 Basic Requirements for Rubber and Plastic Hoses and Hose Devices, the outer layer of rubber shall have good weather resistance, wear resistance and aging resistance.

2、 Structural Design Standards

The structural design of the braided rubber hose should consider its usage function and installation environment, and follow the following standards:

1. Dimensional standards: including inner diameter, outer diameter, wall thickness, etc., must comply with national standards or customer requirements to ensure compatibility with upstream and downstream equipment.

2. Weaving layer structure: The weaving angle, density, and number of layers of the weaving layer need to be designed according to the pressure bearing capacity and fatigue resistance of the rubber hose to achieve performance balance.

3. Joint design: The joints at both ends of the hose should be made of high-strength and corrosion-resistant metal materials, and designed with reliable sealing structures to ensure the sealing and pressure resistance of the connection.

3、 Production process standards

The production process of braided rubber hoses is complex and requires strict adherence to the following standards:

1. Extrusion inner tube: The inner layer adhesive needs to be evenly extruded through an extruder to form an inner tube with a certain wall thickness. According to the process requirements, the wall thickness of the inner tube needs to be controlled within a certain range to ensure its support and sealing.

2. Weaving process: The inner tube surface is uniformly woven with a reinforcement layer, which requires the use of high-precision weaving machines to ensure the uniformity and density of the weaving layer. During the weaving process, it is necessary to control the weaving speed and tension to avoid the weaving layer being too tight or too loose.

3. Covering outer layer adhesive: Cover an outer layer of adhesive on the outer woven layer, and evenly extrude it through an extruder to tightly bond the outer layer adhesive with the woven layer. Attention should be paid to controlling the extrusion temperature and speed during this process to ensure the uniformity and density of the outer layer of adhesive.

4. Sulfurization treatment: After coating, the rubber hose needs to undergo vulcanization treatment to improve the cross-linking degree and physical properties of the rubber material. The vulcanization process requires strict control of temperature and time to avoid the occurrence of under sulfur or over sulfur phenomena.

4、 Testing and Quality Control

Multiple tests and quality control are required during the production process of braided rubber hoses to ensure that product quality meets standard requirements

1. Physical performance testing: including tensile strength, burst pressure, bending performance, fatigue resistance, etc., to evaluate the mechanical properties and service life of rubber hoses.

2. Sealing test: Check the sealing performance of the hose and joint through pressure testing to ensure no leakage.

3. Medium resistance test: Conduct corrosion resistance, aging resistance, and other tests on specific media to verify the applicability of rubber hoses in that medium.

4. Appearance quality inspection: Check whether the surface of the rubber hose is flat, free of bubbles, cracks and other defects, to ensure that the appearance quality meets the requirements.

The production and manufacturing of braided rubber hoses should follow a series of strict standards and specifications to ensure that the product quality meets the standard requirements and that the hose will not cause harm to personnel, equipment, or the environment during use, such as avoiding the use of toxic and harmful additives.