GB/T 222-2025 "Hlau thiab Cov Khoom Sib Xyaws - Kev Hloov Pauv Uas Tso Cai Hauv Cov Tshuaj Lom Zem ntawm Cov Khoom Tiav" yuav siv tau rau lub Kaum Ob Hlis 1, 2025, hloov cov qauv GB/T 222-2006 thiab GB/T 25829-2010 yav dhau los.
Cov Ntsiab Lus Tseem Ceeb ntawm Tus Txheej Txheem
1. Scope: Npog cov kev hloov pauv uas tso cai hauv cov tshuaj lom neeg rau cov khoom tiav (xws li billets) ntawm cov hlau tsis yog hlau, hlau tsis tshua muaj hlau, hlau sib xyaw,hlau tsis xeb, cov hlau uas tiv taus cua sov, cov hlau sib xyaw uas tiv taus xeb, thiab cov hlau sib xyaw uas kub heev.
2. Kev Hloov Pauv Tseem Ceeb ntawm Kev Siv Tshuab:
Ntxiv kev faib tawm ntawm cov sulfur uas tso cai rau cov hlau tsis yog hlau thiab cov hlau tsis yog hlau.
Ntxiv kev faib tawm ntawm cov kev hloov pauv uas tso cai rau cov sulfur, txhuas, nitrogen, thiab calcium hauv cov hlau sib xyaw.
Ntxiv cov kev hloov pauv uas tso cai rau cov tshuaj lom neeg hauv cov hlau uas tiv taus xeb thiab cov hlau kub siab.
3. Daim Ntawv Teev Npe Siv
Hnub Luam Tawm: Lub Yim Hli 29, 2025
Hnub Siv: Lub Kaum Ob Hlis 1, 2025
Lub sijhawm tshaj tawm: Kaum Ib Hlis-10-2025
