1. ** Qhov sib txawv ntawm Astm thiab Aashto Yeeb Nkab: **
ASTM (American Society rau kev sim thiab cov ntaub ntawv) kev ua haujlwm yeem cov txheej txheem rau ntau yam khoom siv, cov khoom siv, suav nrog ntau hom yeeb nkab siv ntau yam lag luam. Aashto (American Association of State Highway thiab cov chaw tsheb thauj mus los) tsim cov qauv rau cov ntaub ntawv thiab cov qauv kev tsim kho siv hauv kev loj thiab tsheb thauj khoom. Thaum Aashto cov qauv feem ntau siv AstM Cov lus qhia tshwj xeeb, xws li Charoster Kev Cuam Tshuam, lossis Charpy V-qhov yuav tsum tau ua kom cov khoom siv thauj mus los, lossis cov kev ua kom muaj kev nyab xeeb ntawm cov choj, cov neeg ua haujlwm ntawm cov neeg sib txuas lus.
2. ** Qhov sib txawv ntawm Astm A53 thiab Astm A795: **
ASTM A53 covers standard specification for pipe, steel, black and hot-dipped, zinc-coated, welded and seamless. Nws yog lub hom phiaj dav dav siv rau cov tshuab siv tshuab (xws li cov kav dej (cov kav dej) thiab rau cov dej, dej, roj av. ASTM A795 cov ntaub npog cov qauv rau cov xim dub thiab kub-dipped zinc-coated (galvanized) welded thiab seamless steel quav tshwj xeeb rau kev tiv thaiv hluav taws xob tshwj xeeb. Qhov sib txawv tseem ceeb yog cov ntawv thov npaj thiab cov Stricter yuav tsum muaj nyob rau hauv lub tshuab hluav taws. A795 ua kom muaj kev ntsuas hydrostatic, tso cai rau cov caij nyoog uas muaj ntau ntau, thiab xav tau cim kev nyab xeeb rau kev tiv thaiv hluav taws hauv hluav taws kub.
3. ** Lub ntsiab lus ntawm Astm thiab Aashto: **
* ** ASTM: ** Sawv rau ** ** Tus lej ** Nws yog cov txheej txheem thoob ntiaj teb cov qauv tsim kho thiab tshaj tawm cov qauv kev yeem lees paub txog kev ua haujlwm rau ntau yam khoom siv, cov khoom lag luam, cov tshuab, thiab cov kev pabcuam, cov kev pabcuam, kev pabcuam.
* ** Aashto: ** Sawv rau ** ** Forsan ** a ** ssociation ntawm ** h ** orgeway thiab ** t ** ransportation ** o ** Feficials. Nws yog cov qauv teeb tsa lub cev muaj cov sawv cev los ntawm cov neeg saib xyuas tsheb thauj mus los ntawm txhua Asmeskas, Cheeb Tsam Tsev Kawm Ntawv Columbia, thiab Puerto Rico. Aashto kev tsim tawm cov ntsiab lus tshwj xeeb, cov lus qhia, thiab kev coj ua feem ntau yog tsom rau cov ntaub ntawv thiab cov qauv kev tsim kho uas siv hauv kev loj thiab kev thauj cov tsheb thauj khoom.
4. ** ASTM A36 sib npaug rau Aashto: **
Qhov ze tshaj Aashfe sib npaug rau ASTM A36 qauv hlau yog ** Aashto M270 Qib 250 ** (yav tas los M270 Qib 36). Ob qho tib si qhia cov roj carbon steel, daim hlau, thiab kab nrog tsawg kawg lub zog ntawm 250 mpa (36 ksi). ** CEEB TOOM TSEEM CEEB: ** Thaum lub zog ua kom muaj zog, Aashto M270 cov qauv kev yuav ua kom muaj kev cuam tshuam kom muaj kev cuam tshuam kom txaus rau cov ntawv thov Choj, uas ASTM A36 tsis muaj qhov xav tau. ASTM A36 cov khoom siv yuav tsis ntsib M270 cov kev xav tau tsis muaj yam tsis muaj kev txiav txim lossis kuaj. Txheeb xyuas ncaj qha yog tsis siv tsis siv neeg thiab nyob ntawm cov phiaj xwm kev tshaj tawm.
5. ** Suav cov lus sib npaug ntawm AVTM A36: **
Tus qauv Suav tshaj plaws rau ASTM A36 qauv hlau yog ** GB / Q235 **, Q235C, lossis Q235D). GB / T 700 npog cov qauv cov pa roj teeb rau cov hom phiaj engineering. Zoo li A36, Q235 muaj lub zog nominal pov tseg muaj zog ntawm 235 MPa. ** CEEB TOOM TSEEM CEEB: ** Thaum Q235 yog qhov ua tau zoo li A335 yog qhov sib txawv, muaj cov kev cuam tshuam deoxidation (cuam tshuam rau cov kev cuam tshuam rau kev vuam) Q235b yog cov khoom lag luam feem ntau piv rau A36, tab sis Q235C lossis D muaj cov khoom cuam tshuam zoo dua. Kev sib txig ncaj qha yuav tsum tau txheeb xyuas cov ntawv thov tseem ceeb raws li cov khoom uas xav tau.
