Casing Tube 1.We are manufacturer 2.BW,NW,HW,PW,SW,UW,ZW 3.NX,HW,PX,SX, 4. 46,56, ... 66,76,86,101,116,131,146 WCasing Tube (X ... become worn or damaged. It also means that the casing tube can have a thinner wall than the coupling, allowing the ... popular type of casing used in geotechnical applications. DCDMA Casing tube(BW,NW,HW,PW,SW,UW,ZW) & (NX,HX,PX,SX)