GB 2550-92 Welding and Cutting rubber hoses - Oxygen rubber hoses
The GB 2550-92 welding and cutting rubber hoses standard required for the production of oxygen rubber hoses in China. It includes the specifications for the materials, construction requirements, quality assurance, physical and quality of the hose, and methods of testing and inspection.
The materials used in producing oxygen rubber hoses are compounds of elastomers, plasticizers, reinforcing filings, binders, and common additives. Elastomers can be either natural or synthetic rubber. Plasticizers are used to increase flexibility and improve molded shapes. The reinforcing fillers and binders typically used include glass fibers, carbon fibers, and high tenacity synthetic fibers. Common additives are used to improve certain properties, such as temperature resistance, heat aging, ozone resistance and oil resistance.
The construction requirements of the oxygen rubber hose cover the nominal diameter, length, mixing and vulcanization, coloring and marking, test pressure, and braiding. The nominal diameter should be indicated by an adequate size marking which is specified in the standard. The length of the hose should be determined according to customer requirements. Mixing and vulcanization should be carried out in accordance with a process guaranteed by the manufacturer. The coloring and marking should be clearly visible and should conform to the requirements set out in the standard.
The quality assurance of oxygen rubber hoses covers the control of raw materials, process control, and final inspection. The control of raw materials should ensure that the raw materials used meet the requirements of the standard. During the process control, the quality and quantity of the materials should be constantly monitored. Once the hose is finished, a final inspection should be conducted, with prescribed test methods and inspection methods outlined in the standard.
The physical and quality of the hoses should also meet the requirements set out in the standard. These requirements cover the inspection of the physical properties, the determination of the reconnection pressure and leakage test, temperature test, deformation test, and air permeability test.
The methods of testing and inspection provide additional details on the various tests and inspections that need to be conducted in order to ensure the safety and quality of oxygen rubber hoses. The tests that need to be conducted are hydrostatic test, proof pressure test, and burst test. The inspections that need to be carried out are visual inspection, colour inspection, diameter inspection, length inspection, adhesion inspection, disconnection test, and wear resistance test.
In conclusion, the GB 2550-92 welding and cutting rubber hoses standard provides specifications for the materials, construction requirements, quality assurance, physical and quality of the hose, and methods of testing and inspection for producing oxygen rubber hoses in China. These requirements reduce the risk of potential safety issues, as well as ensure that the quality of the hoses remain consistent and adhere to industry standards.
