### 1. Dab tsi yog qhov txawv ntawm A333 Gr 3 thiab Gr 6?
ASTM A333 Qib 3 thiab Qib 6 thiab qib 6 yog ob tus qauv rau seamless thiab welded steel yeeb nkab rau tsawg- kev pab kub. Tus yuam sij sib txawv ntawm lawv yog:
* ** Cov tshuaj sib xyaw ua tshuaj (chemistry): ** Qhov sib txawv tshaj plaws nyob hauv lawv cov ntsiab lus alloy. Qeb 3 yog ib tug carbon steel. Qeb 6 yog ib npib tsib xee -} cov hlau alleoy, muaj ntawm 3.18% rau 3.82% npib tsib xee. Qhov no ib ce Nickel ntxiv yog qhov tseem ceeb rau kev txhim kho qis - kub raws.
* ** Tsawg {{{{- kev cuam tshuam kub (ob leeg qib tau tsim los ua kom muaj qhov kub tsawg, tab sis lawv cov ntsiab lus kub sib txawv sib txawv vim yog cov ntsiab lus tsib xee. Qeb 3 yog feem ntau ntsuas rau kev pabcuam qis rau -45℃f (-43 degree). Qeb 6, nrog nws cov ntsiab lus npib tsib xee, yog ntsuas rau ntau dua qhov kub, qis rau -100℃f (-73 degree) thiab txawm qis dua hauv qee kis.
* ** Qib khoom 6 feem ntau muaj lub zog loj tshaj lub zog thiab tawm lub zog piv rau qib 3 vim tias nws li kev sib xyaw ua ke.
* ** Vim li cas: ** Vim yog qhov sib ntxiv ntawm Nickel, A333 gr. 6 cov yeeb nkab yog kim dua 333 gr {{kua yeeb.
Hauv cov ntsiab lus, ** Gr . 6}} muaj cov nickel rau qhov kub dua ntawm cov roj carbon steel gr} {1} {1 **
### 2. Cov yeeb nkab qib yog dab tsi?
Lo lus nug no yog ua raws li kev to taub yuam kev. ASME (American Society of cov neeg kho tshuab engineers) nws tus kheej tsis tsim "qib" ntawm cov khoom siv yeeb nkab zoo li ASTM.
Hloov chaw, ASME tsim cov cim thiab cov qauv tsim thiab cov qauv kev ntsuas kom muaj kev nyab xeeb, thiab kuaj kom muaj kev nyab xeeb rau kev nyab xeeb, B31.3 rau cov piping fais fab).
Txawm li cas los xij, ASME kuj * aidionsks * Cov Khoom Siv Specifications los ntawm lwm cov koom haum, feem ntau ATM. Thaum twg ASTM specification yog saws los ntawm ASME, nws tau txais ib qho kev tsim qauv dual. Piv txwv li, ib qho khoom siv yeeb nkab tau teev los ntawm Astm yog ** ATTM A106 **. Thaum no specification yog saws siv nyob rau hauv ASME siab Piping Codes, nws tau raug hu ua ** ASME SA36 **.
Yog li, koj yuav qhia cov yeeb nkab raws li "** ASME SA36 qib b **," nyob qhov twg "qib b" yog qib nyob hauv qhov kev tshwj xeeb.
### 3. Dab tsi yog astm yeeb nkab qib?
ASTM (American Society rau kev sim thiab cov ntaub ntawv) cov khoom siv hlau yog cov tshuaj lom neeg tshwj xeeb uas muaj cov tshuaj tua cov yeeb nkab. Txhua qib qhia txog qib sib txawv ntawm lub zog, alloy cov ntsiab lus, lossis haum rau cov mob tshwj xeeb.
Piv txwv li, hauv qhov tshwj xeeb ** ASTM A106 ** (rau seamless carbon steel yeeb nkab rau siab- kub kev pab), muaj peb qib kawm:
* ** QIB A: ** muaj qhov qis tshaj plaws yuav tsum tau ua.
* ** Qib B: ** Feem ntau cov qhab nia, nrog lub zog nruab nrab.
* ** Qib C: ** muaj lub zog siab tshaj plaws ntawm peb.
Cov "qib" tso cai engineers los xaiv cov khoom siv cov khoom ntiag tug xav tau rau lawv cov ntawv thov tshwj xeeb, ntsuas nrog tus nqi.
### 4. Dab tsi yog qhov sib txawv ntawm ASTM thiab ASME YEES?
Qhov sib txawv ntawm Astm thiab ASME tsis nyob hauv cov yeeb nkab lub cev nws tus kheej, tab sis nyob rau hauv ** hom phiaj thiab cov qauv ntawm cov qauv ** lawv luam tawm.
* ** ASTM International Jo Tsom Fwm rau ** Cov Khoom Siv Khoom Siv **. ASTM cov qauv (zoo li A106, A53, A333) Siv zog rau cov tshuaj lom neeg (tawm lub zog rau cov yeeb yaj kiab) Lawv teb cov lus nug: "Dab tsi yog cov yeeb nkab ua los ntawm thiab nws cov khoom li cas?"
* ** ASME ** tsom rau ** Tsim qauv thiab tsim qauv ** rau cov khoom siv siab. ASME Cov Qauv (zoo li B31.3, B31.1) Yuav ua li cas siv cov yeeb nkab, fittings, li qub, thiab lwm yam kev nyab xeeb piping * system *. Lawv teb cov lus nug: "Kuv tsim li cas, siv ntaub, thiab sim piping kev nyab xeeb siv cov yeeb nkab no?"
** Kev sib raug zoo tseem ceeb: ** ASME Codes feem ntau * siv * thiab xav tau kev siv cov tshuaj astm cov khoom siv. Thaum lawv ua, ASTM spec tau txais ib qho "S", Astm A106 ua ASMe SA36). Ib tus yeeb nkab tuaj yeem tsim tawm rau ASTM spec thiab tom qab ntawd siv rau hauv cov txheej txheem ua rau ib qho kev cai ASME.
### 5. Dab tsi yog cov chav kawm ntawm cov kav dej HDPE?
Rau HDPE (siab - ntom polyethylene) kav (pc) (pc) Qhov no yog raws cov khoom siv hydostatic tsim hauv paus (HDB) thiab cov yeeb nkab qhov ntev.
Qhov kev faib tawm feem ntau yog los ntawm ** pn (siab nominal) **, uas yog ib tus lej uas sib haum rau cov kev pub rau cov khoom siv. Cov chav kawm sib xws muaj:
* ** PN 4: ** Kev Ntsuas Siab Ntawm 4 Bar (~ 58 PSI)
* ** PN 6: ** Kev Ntsuas Siab Ntawm 6 Bar (~ 87 PSI)
* ** PN 8: ** Kev Ntsuas Siab Txog 8 bar (~ 116 psi)
* ** PN 10: ** Kev Ntsuas Siab Ntawm 10 Bar (~ 145 PSI)
* ** PN 12.5: ** Kev Ntsuas Siab Ntawm 12.5 Bar (~ 181 PSI)
* ** PN 16: ** Kev Ntsuas Siab Ntawm 16 Bar (~ 232 PSI)
Lwm qhov tseem ceeb ntawm kev faib tawm yog los ntawm ** Cov qib kawm **, uas yog hais txog lub resin qhov kev tawm tsam qeeb qeeb thiab nws ntev} lub zog. Cov qhab nia kawm yog PE 63, PE 80, PE 100, thiab tus tshiab tshaj 100-rc. ** PE 100 ** Puas yog tus qauv kev lag luam tam sim no rau cov ntawv thov siab feem ntau, muab cov phab ntsa rov qab zoo tib yam xws li PE 80.
