Chii chinonzi Astm a269 tubing?

isu tiri vagadziri vesimbi isina tsvina astm a249 coil tubing, chiyero ndeye ASTM A 249 Coil tubing, iyo chubhu ndeye Standard ndeye ASTM A249.iyo yepamusoro inopenya, kureba i4000m/Coil, iyo coil chubhu yakapfava, inogona kushandiswa kumunda wemafuta, pombi inokodzera, Zvishandiso