The old national standard type I GB/T17643-1998 GH-I standard has a geotextile membrane expansion rate of 450%.

The old national standard type II GB/T17643-1998 GH-II standard has a geomembrane expansion rate of 550%.

The expansion and contraction rate of geomembrane in the new national standard type I GB/T17643-2011 GH-I standard is 600%.

The new national standard type II GB/T17643-2011 GH-2S standard has a geomembrane expansion rate of 700% (double smooth surface).

The expansion and contraction rate of geomembrane in the new national standard type II GB/T17643-2011 GH-2T1 and GH-2T2 standards is 100% (single rough surface, double rough surface).

The expansion and contraction rate of geomembrane in the urban construction standard CJ/T234-2006 is 700% (double smooth surface).

The expansion and contraction rate of geomembrane in the urban construction standard CJ/T234-2006 is 100% (single rough surface, double rough surface).

The American standard GRI GM-13 geomembrane is equivalent to the urban construction CJ/T234-2006 standard.