VEI of standard sizes Du50 … .du300 are made on TU 1469-027-05015070-2001 specifications.
VEI of standard sizes Du300 … are made by Du1400 on TU 1469-031-05015070-2007 specifications.
TU 1469-027-05015070-2001 and TU 1469-031-05015070-2007 passed in 2010 an omologation on compliance "To temporary technical requirements to inserts (couplings) electroisolating valid through 28.04.2015 and are included in the list (register) of production allowed for use in the JSC Gazprom system
Available the electroisolating insert to DU 1420, the isolating IMM monolithic coupling
Are intended for electric division (sectioning) of pipelines for the purpose of increase of overall performance of systems of electrochemical protection of the pipelines transporting natural gas, gas condensate, oil, oil products, water and other gases and liquids.
The isolating monolithic couplings on working pressure to 9,8 MPas