Difference between non-standard rubber joint and national standard rubber joint
Non standard is in shape and about the structure of standard atlas case material of flange thickness, flange ring thickness, diameter and thickness that relax the requirements, strictly speaking, these are unqualified products, of course, a certain extent to relax the standard does not affect the use, but too much to the influence of the relaxation of standards to use performance.
GB and non standard. GB type rubber joint refers to the material selection and production in accordance with the relevant 02S404 or 02S312 standards of the Ministry of construction, and has strict requirements on flange thickness, flange thickness, diameter and thickness.
Rubber joint national Ministry of water conservancy is standard CJ/T208-2005 documents of rubber joint standard, this paper has clear rules for the product, identify the products should meet the following characteristics: standard rubber joint extrusion is produced by the rotation of the screw, the glue is advancing, and with the help of the mouth, but the needs of various semi-finished extrusion the shape of the. The extrusion process is characterized by uniform and compact quality and easy conversion of semi-finished product specifications and section shapes. The extrusion process of the national standard rubber joint in the extruder is divided into two parts: one is the extrusion system used for pushing the rubber; the two is the die system, which is used to form the rubber to make a definite section shape. Therefore, in the process of pressing, the rubber layer is usually more than ten layers, and the rubber joint has the characteristics of compact structure and high pressure resistance.Non-standard rubber joint is in the national standard between substandard products and national standard products, often illegal businesses use to reduce the rubber joint, the number of layers to reduce the cost of rubber joints. Use non-standard products instead of GB products. Non-standard products in use process, because the arc bearing layer, rubber layer is insufficient, the strength drops, in the use process is easy because the pressure withstanding insufficient causes the pipe network to burst.
