Rubber Expansion Joint Pipe Fitting Flexible Connector S304 Flexible Joint Threading

Specification：

Flange ：Carbon Steel/Stainless Steel

Out/inner rubber ：EPDM/NBR

Frame ：Nylon Cord Fabric

Pressurized Ring ：Steel wire Strand

Size： 3/4"-48"DN20-DN1200mm

Pressure range ：PN10,PN16,5k,10k,125LB,150LB

Design Standard ：BS,DIN,ANSI,GOST,JIS

Flange Standard ：EN1092,BS4504,DIN2533,ANSI B16.5,JIS B2220

Testing Standard： EN 12226

Flexible rubber joints, also known as rubber hose couplings, bendable rubber joints, or shock-absorbing hoses, are elastic connectors used in piping systems to compensate for multi-directional displacements. They are classified by connection method into loose-flange types, fixed-flange types, and threaded types, and can be structured as single-spherical, double-spherical, bent-spherical, or wind-pressure coil types. The main body of these joints consists of inner and outer rubber layers, a fabric reinforcement layer, and steel wire rings. After vulcanization, they are combined with metal flanges. The manufacturing process involves the use of polyester fabric in an alternating weave, resulting in joints with high airtightness, weather resistance, chemical resistance, and excellent elasticity . By replacing the adjusting rings with different materials, the mechanical properties of the joints can be modified. Utility model patents cover the design of the rubber body, pipe end connectors, and the adjusting rings themselves .

This product is suitable for pipeline systems in industries such as petroleum, chemical engineering, and power, where it is used to transport water, oil, and granular materials. It is applied in various scenarios, including building structures and vehicle shock absorption systems [2][4], and can help reduce vibrations and noise. Additionally, it compensates for thermal expansion and contraction caused by temperature changes. The ball-shaped components can be made of natural rubber, styrene-butadiene rubber, or ethylene-propylene-diene monomer rubber to meet the needs of different media, and comply with international standards such as BS4504 and DIN . The product has obtained the TS Pressure Pipeline Production License and ISO9001 certification, and typical applications include power plants and wastewater treatment facilities [3][5]. The Chinese market is experiencing growth driven by the development of new energy vehicles .