I-20G ipayipi yensimbi engenamthungo luhlobo oluqhelekileyo lwepayipi yensimbi engenamthungo. I-"20G" egameni layo imele izinto zombhobho wensimbi, kwaye "i-seamless" imele inkqubo yokuvelisa. Le ntsimbi idla ngokuqulunqwa ngentsimbi ye-carbon, i-alloy steel, njl., kwaye ineempawu ezintle zoomatshini kunye ne-weldability. Iimpawu eziphambili ze-20G umbhobho wensimbi ongenamthungo ukuxhatshazwa kweqondo lokushisa eliphezulu, ukuxhathisa kwe-corrosion, amandla aphezulu okunyamezela, njl. Ngoko ke, isetyenziswe ngokubanzi kwi-petroleum, igesi yendalo, imboni yeekhemikhali, amandla ombane, ukwakhiwa kunye nezinye iindawo.

Imigangatho yokuphunyezwa:
1. Umbhobho wentsimbi ongenamthungo kwisakhiwo:GB8162-2018
2. Umbhobho wentsimbi ongenamthungo wokuhambisa ulwelo: GB8163-2018
3. Umbhobho wentsimbi ongenamthungo webhoyila yebhoyila yoxinzelelo oluphantsi noluphakathi:GB3087-2018
4. Umbhobho ongenamthungo woxinzelelo oluphezulu kwibhoyila:GB5310-2018
5. Umbhobho wentsimbi ongenamthungo ophezulu woxinzelelo lwezixhobo zesichumiso:GB6479-2018
6. Umbhobho wentsimbi ongenamthungo wokuqhekeka kwepetroleum:GB9948-2018