Ngomhla ziyi-17 kuSepthemba 2021, uMnyango Wezohwebo wase-US ukhiphe isimemezelo esithi ukubuyekezwa kokugcina okunqanda ukulahlwa kwe-carbon steel butt-welded pipe fittings (CarbonSteelButt-WeldPipeFittings) angeniswe esuka e-China, Taiwan, Brazil, Japan naseThailand kuzophothulwa. .Uma ubugebengu bukhanseliwe Imisebenzi yokulwa nokulahlwa kuleli cala izoholela ekulahlweni kwemikhiqizo ethintekayo ecaleni e-China ngezinga lokulahlwa lika-182.90% noma ukwenzeka kwamacala, izinga lokulahlwa kwemikhiqizo ehilelekile ecaleni I-China izoqhubeka noma izokwenzeka, futhi ukulahlwa kwemikhiqizo ehilelekile ecaleni kuzoqhubeka noma kwenzeke ngezinga lokulahlwa lika-87.30% no-52.25%.Ukulahlwa kwemikhiqizo ehilelekile ecaleni kwaqhubeka noma kwenzeka ngezinga lokulahlwa lika-65.81%, futhi izinga lokulahlwa kwemikhiqizo ehilelekile eThailand laqhubeka noma lenzeka ngezinga lokulahlwa lika-52.60%.Kungu-7307.93.30.

Ngomhla ziyi-12 kuZibandlela, 1986, i-United States yabeka ngokusemthethweni imisebenzi yokulwa nokulahlwa kwepayipi le-carbon steel butt-welded pipe elivela e-Brazil nase-Taiwan, e-China.NgoFebhuwari 10, 1987, i-United States yabeka ngokusemthethweni umsebenzi ophelele wokulwa nokulahlwa kwezinto ezifakwa epayipi le-carbon steel butt-welded eliphuma e-Japan., Ngo-July 6, 1992, i-United States yabeka ngokusemthethweni umsebenzi ophelele wokulwa nokulahlwa kwezinto ezifakwa epayipini elinezinqe ezishiselwe i-carbon steel butt elaqala e-China naseThailand.Kusukela lapho, i-US yenze ukubuyekezwa kokushona kwelanga okungu-4, ngoJanuwari 6, 2000, Novemba 21, 2005, Ephreli 15, 2011, no-Agasti 23, 2011. Ukuqinisekiswa nesimemezelo kwenziwa izikhathi ezi-4.igama.Ngomhla zi-1 kuJulayi, 2021, uMnyango Wezohwebo wase-US ukhiphe uphenyo ngesibuyekezo sesihlanu sokulwa nokulahla kokushona kwelanga kokufakwayo kwepayipi le-carbon steel butt-welded elandwe lisuka e-China, Taiwan, Brazil, Japan nase-Thailand.