** 1. Dab tsi yog ASTM F876? **
ASTM F876 yog tus qauv kev qhia tshwj xeeb rau cov ntoo khaublig-}} txuas Polyethylene (PEX) tubing. Nws teeb tsa cov tseev kom muaj rau cov ntaub ntawv, cov kev ua haujlwm, kev ntxhov siab ntawm kev ntxhov siab, thiab ib puag ncig cov khoom xa tawm hauv cov tshuab faib dej potable thiab lwm yam kev siv.
** 2. Dab tsi yog qhov nyiam astm xaiv steel hom rau siv nyob rau hauv steel yeeb nkab? **
Tsis muaj ib qho "nyiam dua", raws li kev xaiv yog nyob ntawm daim ntawv thov (piv txwv li, kev kub, corrosion ib puag ncig). Txawm li cas los xij, qee qhov feem ntau teev thiab dav siv Astm cov qauv rau cov yeeb nkab steel yog:
* ** ASTM A53: ** Rau cov hom phiaj dav dav, qis {{1} - kav dej khov (piv txwv, cov kais dej sprinklers).
* ** ASTM A106: ** Rau qhov siab- kev pab kub, xws li hauv cov nroj tsuag hluav taws xob thiab kev ua kom zoo.
* ** ASTM A312: ** rau cov kav dej stainless hlau uas siv hauv cov chaw muaj kev nyab xeeb.
** 3. Dab tsi yog qhov sib txawv ntawm Astm A403 thiab ASTM A234? **
Cov ntsiab lus tseem ceeb yog cov khoom siv hauv paus ntawm cov piping Cheebtsam lawv cover:
* ** ASTM A403 ** COV PHEEJ YEEM LOS NTAWM PHAJ lossis PHAJ) Cov Khaub Ncaws Ntaus Stainless Hlau Rau Siv Nrog Kev Ntsuas Siab Stainless.
* ** ASTM A234 ** Them npog cov hlau thiab cov hlau nplaum Alloy Steel thiab Alloy Steel fittings rau siv nrog siab piping ntawm kev kub thiab siab kub.
Hauv cov ntsiab lus yooj yim, A40 yog rau cov hlau tsis muaj hlau, thaum A234 yog rau cov hlau thiab cov hlau nplaum alloy.
** 4. Dab tsi ua astm sawv rau? **
ASTM sawv rau ** ASTM International **, uas tau paub yav tas los hu ua ** Neeg Asmeskas haiv neeg rau kev sim thiab cov ntaub ntawv **.
** 5. Leej twg siv ASME cov qauv? **
Asme cov qauv yog siv feem ntau los ntawm cov engineers, cov neeg tsim qauv, tuam ntxhab, tus kws ntsuam xyuas, thiab cov kws tshaj lij nyob thoob plaws kev lag luam. Cov neeg siv tseem ceeb muaj xws li:
* Lub zog loj hlob kev lag luam (tshwj xeeb tshaj yog nuclear thiab fossil roj nroj tsuag).
* Cov roj thiab roj kev lag luam.
* Cov petrochemical thiab cov txheej txheem kev lag luam.
* Boiler thiab siab rau cov nkoj tsim khoom lag luam.
* Cov kav dej thiab cov piping system cov ntaub tshaj tawm.
* Tsoomfwv cov kev tswj hwm lub cev thiab cov tub ceev xwm kev nyab xeeb uas saws cov qauv no tau ua rau txoj cai lij choj.
