Donsen tau tsim muaj nyob rau hauv 1996, uas locates nyob rau hauv NINGBO qhov twg yog ib tug tsim thiab zoo nkauj thoob ntiaj teb chaw nres nkoj lub nroog. Muaj ntau tshaj 20 xyoo kev nyob rau hauv daim teb no, peb yog ib tug ntawm cov feem ntau kev manufacturers tshwj xeeb nyob rau hauv producting yas pipeline rau dej thiab dej system.

Peb cov khoom tseem ceeb yog PP-R cov kav dej thiab cov khoom siv, PP compression fittings, C-PVC cov kav dej thiab cov khoom siv, U-PVC cov kav dej thiab cov khoom siv, PE cov kav dej thiab cov khoom siv, PE-RT cov kav dej cua sov hauv pem teb, pwm yas thiab txhua yam yas li qub. Piv txwv li: PVC valve, PPR valve, C-PVC valve, BRASS valve.