Qhov sib txawv ntawm astm a312 thiab astm a358
Tso lus
ASTM A312 specification yog dab tsi?
ASTM A312 yog tus qauv tshwj xeeb rau seamless, ncaj-seam welded, thiab hnyav hnyav- ua haujlwm austenitic stainless hlau yeeb nkab tsim rau siab - kub thiab kev pabcuam corrosive. Cov qib feem ntau suav nrog 304/304L thiab 316/316L, dav siv hauv kev thauj dej rau roj, roj, thiab dej siv.
Nyem rau rub tawm ASTM A312 (PDF Dawb)
ASTM A358 specification yog dab tsi?
ASTM A358 yog tus qauv tshwj xeeb rau hluav taws xob- fusion-welded (EFW) austenitic chromium-nickel stainless hlau yeeb nkab npaj rau siab - kub thiab kev pabcuam corrosive. Nws suav nrog ntau qib (piv txwv li, 304, 316, 321) feem ntau siv hauv kev lag luam tshuaj lom neeg, petrochemical, thiab hluav taws xob tsim kev lag luam.
Nyem rau rub tawm ASTM A312 (PDF Dawb)
Qhov txawv ntawm ASTM A312 thiab ASTM A358:
| Feature | ASTM A 312 Cov Lus Qhia | ASTM A 358 Cov Khoom Siv Hluav Taws Xob |
| Full Title | Seamless, Welded, thiab hnyav hnyav ua haujlwm Austenitic stainless hlau kav. | Hluav taws xob-Fusion-Welded (EFW) Austenitic Chromium-Nickel Stainless Steel Pipe. |
| Kev tsim khoom | Seamless (SMLS) los yog Tsis Siv Neeg Welded. | Electric Fusion Welded (EFW) siv lub phaj thiab lub tshuab vuam. |
| Filler Hlau | Tsis tso cai thaum lub sij hawm vuam txheej txheem. | Yuav tsum tau (cov khoom siv hlau ntxiv rau qhov sib koom ua ke). |
| Pipe Diameter Range | Feem ntau 1/8 "mus rau 30". Tsom ntsoov rau qhov me me mus rau qhov nruab nrab. | Feem ntau 8 "mus rau 72" +. Tsom rau cov kab loj loj. |
| Phab ntsa Thickness | Cov Txheej Txheem Txheej Txheem (Sch 5S txog Sch 80S / 160). | Feem ntau siv rau hnyav- daim ntaub ntawv phab ntsa (Kev cai thicknesses). |
| Vuam Chav Kawm | Tsis muaj cov chav kawm tshwj xeeb; categorized los ntawm SMLS los yog Welded. | 5 Chav Kawm (Class 1 txog Chav Kawm 5) raws li kev sib koom ua ke thiab X-ray. |
| Kev ntsuas hluav taws xob (RT) | Tsis tas yuav tsum tau (xaiv tau / ib daim ntawv cog lus). | Yuav tsum tau ua rau Chav Kawm 1, 3, thiab 5 (X- kuaj kab hluav taws xob). |
| Kev sib koom ua haujlwm | 1.0 rau SMLS; 0.85 - 1.0 rau Welded. | Nws txawv ntawm 0.7 txog 1.0 raws li Chav Kawm thiab RT. |
| Daim ntawv thov tseem ceeb | General industrial fluid thauj, tshuaj, thiab ua zaub mov. | Loj - cov kav dej loj, cov hlab ntsha siab, thiab siab -siab / kub cov kab. |
ASTM A312: Me me mus rau nruab nrab txoj kab uas hla, General Industrial Fluid Transport
Fine Chemicals thiab Pharmaceutical Industries
Khoom noj khoom haus thiab dej haus ua dab tsi yog qhov txawv ntawm ASTM A790 thiab A312?
Siab -Pressure Instrumentation Piping
Seawater Desalination thiab Kev Kho Dej
ASTM A358: Txoj kab uas hla loj, Kev lag luam hnyav, thiab cov tshuab ua haujlwm siab
ASTM A358 feem ntau hais txog qhov loj - txoj kab uas hla (feem ntau NPS 8 "thiab siab dua) thiab hnyav- phab ntsa stainless hlau kav.
Petroleum Refining Main Pipelines: Cov kab hauv lub cev tseem ceeb siv los txuas cov loj - nplai reactors thiab cov txheej txheem yees.
Fais Fab Boilers thiab Chav Piping
Hnyav-Lub luag haujlwm Lub Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hwj Hnyav Hnyav
Loj -Scale Municipal Facilities: Main twj tso kua mis thiab conveyance headers rau cov dej khib nyiab loj.
Dab tsi yog qhov txawv ntawm astm A778 thiab astm A312?
ASTM A312 thiab ASTM A778 yog ob qho tib si stainless hlau yeeb nkab specifications, tab sis lawv txawv feem ntau hauv kev kho cua sov, npaj siv, thiab kev tsim khoom. A312 yog siv rau siab - siab, dav - siv daim ntawv thov thiab xav tau kev kho cua sov. Hloov pauv, ASTM A778 yog npaj rau qis- kev pabcuam siab / corrosive, yog unannealed, thiab nta zoo dua fabrication rau nyias - cov kav dej.
Dab tsi yog qhov txawv ntawm ASTM A790 thiab A312?
Thawj qhov sib txawv ntawm ASTM A790 thiab ASTM A312 yog nyob rau hauv lawv cov alloy hom thiab cov yam ntxwv ntawm lub zog. ASTM A790 npog seamless thiab welded ferritic / austenitic (duplex) stainless hlau, uas muaj lub zog siab (yield zog> 450 MPa) thiab tshwj xeeb corrosion kuj. Nyob rau hauv sib piv, ASTM A312 npog seamless thiab welded austenitic (300-series) stainless hlau, tsim tshwj xeeb rau corrosive ib puag ncig thiab high-temperature kev pab cuam, thiab nta ib tug kuj qis yield zog (kwv yees li 205 MPa).
Peb tuav cov khoom lag luam ntau ntawm ASTM A312 stainless hlau kav, npog qib 304 thiab 316L hauv qhov ntau thiab tsawg ntawm NPS 1/2 "rau 12". Rau qhov loj - txoj kab uas hla, siab - lub zog siab, Gnee muaj cov loj - txoj kab uas hla hluav taws xob fusion welded (EFW) cov kav dej nrog 100% X- cov ntaub ntawv soj ntsuam kab hluav taws xob. Raws li cov phaj tuab, peb tuaj yeem hloov kho tsis yog - qauv phab ntsa thicknesses kom tau raws li koj cov kev xav tau tshwj xeeb; txoj hauv kev no tsis tsuas yog lav qhov tsim nyog lub zog siab tab sis kuj tseem muaj kev txuag nyiaj ntau dua 30% piv rau cov kav loj - txoj kab uas hla seamless.
