Free-flow system GOFR is a double-wall corrugated pipe, made of modern polymers. Plant «Spiroplast» produces three types of pipes GOFR: GOFR-K (gravity drainage), GOFR-E (cable protection system), GOFR-D (drainage).

Free-flow system GOFR

These systems can be used for construction of networks of external sewage, drainage, as well as a protective cover for laying electrical, telephone and cable television.

Pipes and fittings are made to them in accordance with DSTU BV.2.5-32: 2007 and EN 13476-1:2002 European requirements and EN DIN4261-1:1998-12.


Plant «Spiroplast» makes systems GOFR three types:


1. The sewer system GOFR-K

The sewer system GOFR-K

Dnоm, mm Dnar, mm Dvn, mm
110 110 90
160 160 135
200 229 198

Corrugated pipe for gravity sewer outside GOFR-to made of polyethylene pipe grades. In the case of wastewater containing corrosive environments and high temperature environments, systems GOFR-K are made of polypropylene.

For the construction of non-pressure sewerage outside plant «Spiroplast» makes GOFR-pipe to a diameter of 110, 160 and 200 mm with ring stiffness SN4 and SN8. The pipes are made with bells, lengths of 6 m, or 12 m lengths complete with dvuhrastrubnoy clutch and two sealing rings.