Rubber flanged seals with steel inserts, adjustable wedge rings and insulated flanged joints have proved their quality for decades of service to pipeline construction – especially in water management industry. Business name/product brand: G-ST gaskets with steel insert, service gaskets G-ST-FD and G-ST-FD-GUSS, insulated joint G-ST-P/ISO, mould-cast GOS seals, balancing wedges G-ST-KEILRING.