German Standard Flexible Rubber Joint

The German Standard Flexible Rubber Joint is a single‑sphere expansion joint that isolates pipeline vibration and accommodates axial movement. It conforms to GB 4216.3‑4216.5 flange standards and is available in configurations that resist acid, alkali, oil, heat and other aggressive media. The joint body can be fabricated from cast or forged carbon steel, stainless steel or selected plastics such as CPVC and PVDF. Soft sealing elements are made from various rubbers including NR, CR, IIR, NBR, FKM and EPDM.

Inside the joint, the inner and outer rubber layers are reinforced with a nylon‑cord fabric carcass and a multi‑strand copper‑clad steel wire ring for added strength. Typical working pressure ratings are 10, 16 and 25 bar, while burst pressures range from 30 to 55 bar, and the joint can withstand vacuum levels of 400‑750 mm Hg. Standard operating temperatures for the rubber compounds are - 30 °C to 150 °C, allowing use in many industrial environments. The joint is installed by bolting the flanged ends according to the GB 4216 standard, with diagonal bolt tightening recommended for high‑pressure service.

These joints are widely employed in chemical processing, power generation, oil‑field pipelines and municipal water systems where noise reduction and flexible expansion are required. The supplier offers bulk packaging and can provide custom flange dimensions to match the buyer’s pipeline network. As the listing does not list minimum order quantities, pricing or lead‑time, prospective importers should request that information directly from the supplier. Verifying the material grade of the steel body and the specific rubber compound is recommended before committing to purchase.

Henan Shunying New Energy Co.,Ltd is situated in Room 519, 8th Floor, Unit 2, Building 1, No. 33 Jinsuo Road, High‑Tech Zone, Zhengzhou, Henan Province, China. The supplier carries a harbour trust tier on the platform, with a recorded response rate of 0.00. Its profile highlights a focus on new‑energy related components, including flexible rubber joints for pipeline systems. No additional corporate history or certifications are disclosed in the listing.

The catalogue mentions that the joints can be manufactured with acid‑resistant, alkali‑resistant, corrosive‑resistant, oil‑resistant and heat‑resistant rubber formulations, allowing adaptation to diverse process fluids. The supplier also notes the ability to match the joint with elastic supports for overhead installations and to use bolt connections for high‑pressure applications. Buyers should request material test reports and compliance certificates before ordering.