CHANGRENGke k'hamphani e kopaneng ea indasteri ea likarolo le khoebo, e thehiloeng ka 2005. E shebaneng le tlhahiso e felletseng ea liphaephe le li-fitting tsa HDPE tsa boleng bo holimo (ho tloha ho 20-1600mm, SDR26/SDR21/SDR17/SDR11/SDR9/SDR7.4), le thekiso ea li-fitting tsa PP compression, mechini ea polasetiki ea ho tjheseletsa, lisebelisoa tsa liphaephe le sehokelo sa ho lokisa liphaephe jj.
E na le lisete tse fetang 100 tsa mela ea tlhahiso ea liphaephe, lisete tse 200 tsa lisebelisoa tsa tlhahiso ea ho kopanya. Bokhoni ba tlhahiso bo fihla ho lithane tse fetang likete tse 100. E na le litsamaiso tse 6 tsa metsi, khase, ho cheka, merafo, nosetso le motlakase, letoto le fetang 20 le litlhaloso tse fetang 7000.
Lihlahisoa li tsamaellana le maemo a ISO4427/4437, ASTMD3035, EN12201/1555, DIN8074, AS/NIS4130, 'me li amohetsoe ke ISO9001-2015, CE, BV, SGS, WRAS.



