### 1. ASTM yeeb nkab qauv yog dab tsi?
ASTM cov qauv yeeb nkab yog cov txheej txheem kev qhia tshwj xeeb uas txhais tau tias yuav tsum muaj rau kev tsim khoom, tshuaj lom neeg muaj pes tsawg leeg, cov khoom siv kho tshuab, qhov ntev, kev sim, thiab tshuaj xyuas ntau yam ntawm cov kav dej thiab cov kav dej. Cov qauv no ua kom zoo sib xws, zoo, thiab kev nyab xeeb rau cov kav dej siv hauv ntau hom kev siv. Cov piv txwv tseem ceeb suav nrog:
* ** ASTM A53:** Txuj rau dub thiab kub -dipped galvanized, welded thiab seamless steel yeeb nkab, feem ntau yog siv rau txhua yam thiab siab siv.
* ** ASTM A106:** Txuj rau seamless carbon steel yeeb nkab rau siab - qhov kev pab kub.
* ** ASTM A312: ** Txuj rau seamless thiab welded austenitic stainless hlau kav.
* ** ASTM A335:** Txuj rau seamless ferritic alloy - steel yeeb nkab rau siab - kub kev pab cuam.
* ** ASTM A790: ** Txuj rau seamless thiab welded duplex stainless hlau yeeb nkab.
* ** ASTM D1785: ** Txheem rau polyvinyl chloride (PVC) cov kav dej yas.
* ** ASTM D2513: ** Txheem rau cov kav dej thermoplastic.
### 2. ASTM A106 specification yog dab tsi?
ASTM A106 yog ib qho kev qhia tshwj xeeb rau seamless carbon steel yeeb nkab tsim los rau siab -kev pabcuam kub. Nws yog feem ntau siv rau hauv cov chaw tsim hluav taws xob, roj refineries, thiab cov txheej txheem kev lag luam rau kev xa cov pa, dej, thiab lwm yam kua dej ntawm qhov kub thiab txias. Cov yam ntxwv tseem ceeb ntawm ASTM A106 suav nrog:
** Hom: ** Seamless.
** Khoom siv: ** Carbon steel.
* ** Qib: ** Nws npog peb qib (A, B, thiab C) nrog nce tensile zog thiab cov ntsiab lus carbon. Qib B yog feem ntau siv.
* ** Cov Kev Ntsuas Tseem Ceeb: ** Nws yuav tsum muaj kev sim hydrostatic lossis tsis yog -kev ntsuas hluav taws xob puas tsuaj, nrog rau kev tshuaj xyuas tshuaj lom neeg thiab kev ntsuas tensile.
* ** Daim Ntawv Thov: ** Feem ntau yog rau siab - qhov kev pabcuam kub.
### 3. ASTM tus qauv rau hlau yog dab tsi?
Tsis muaj ib qho "ASTM tus qauv rau cov hlau." Hloov chaw, ASTM International luam tawm ntau pua tus qauv sib txawv rau cov hlau, txhua qhov tsim nyog rau cov khoom tshwj xeeb, txheej txheem, lossis kev siv. Cov qauv no yog tsim los ntawm cov khoom siv. Qhov tseem ceeb tshaj plaws rau cov hlau yog ** "A" Series **, uas suav nrog:
* **Steel Pipes thiab Tubes:** eg, A53, A106, A312.
* ** Steel Phaj, Sheets, thiab Strips:** eg, A36 (cov qauv steel), A516 (siab nkoj phaj).
* **Steel Bolts, Ceev, thiab Rivets:** eg, A307 (carbon steel bolts).
* ** Hlau Castings thiab Forgings:** eg, A216 (steel castings for valves).
* **Stainless Steels:** piv txwv li, A240 (stainless steel daim hlau rau cov hlab ntsha siab).
### 4. Qhov txawv ntawm ASTM A thiab ASTM B yog dab tsi?
Thawj qhov sib txawv yog nyob ntawm hom khoom uas lawv npog:
* ** ASTM A Series: ** Qhov kev xaiv no yog rau cov qauv ntsig txog ** Cov Hlau Hlau thiab Cov Khoom **. "Ferrous" txhais tau tias cov ntaub ntawv yog hlau-raws li, xws li ntau hom hlau (carbon steel, alloy steel, stainless hlau) thiab hlau.
* ** ASTM B Series: ** Qhov kev xaiv no yog rau cov qauv uas muaj feem xyuam rau ** Cov Khoom tsis yog hlau thiab cov khoom **. "Nonferrous" txhais tau tias cov ntaub ntawv tsis yog hlau-raws li. Qhov no suav nrog cov hlau xws li tooj liab, txhuas, npib tsib xee, zinc, thiab lawv cov alloys.
### 5. Dab tsi yog rau hom ASTM?
ASTM cov qauv tau muab faib ua 6 lub ntsiab "hom" raws li lawv lub hom phiaj thiab cov ntsiab lus, tsis yog los ntawm cov khoom siv. Cov no yog:
1. ** Txuj Specification:** txhais cov kev cai rau ib yam khoom, khoom, system, los yog kev pab cuam. (piv txwv li, A106 txhais cov kev cai rau seamless carbon steel yeeb nkab).
2. **Txoj Kev Xeem Txuj Ci:** txhais cov txheej txheem uas ua rau muaj kev xeem. (piv txwv li, Yuav ua li cas ntsuas lub zog tensile los yog tshuaj muaj pes tsawg leeg).
3. ** Txuj kev coj ua:** txhais ib ntu ntawm kev ua haujlwm uas, tsis zoo li txoj kev sim, tsis ua kom muaj txiaj ntsig. Nws piav txog txoj kev ua ib yam dab tsi. (piv txwv li, Cov txheej txheem rau kev sau cov qauv).
4. ** Tus Qauv Qhia:** Muab cov kev xaiv lossis cov ntaub ntawv tab sis tsis pom zoo rau ib qho kev txiav txim tshwj xeeb. Nws muaj kev taw qhia yam tsis tau tsim ib txoj kev ruaj khov.
5. **Txoj kev faib tawm:** Txheej txheem los yog faib cov khoom, khoom, tshuab, lossis kev pabcuam rau hauv pawg raws li cov yam ntxwv zoo sib xws. (piv txwv li, cais ntau hom av).
6. **Terminology Standard:** Muab cov ntsiab lus, cov cim, cov ntawv luv luv, thiab cov ntawv cim uas siv hauv lwm cov qauv ASTM.
