a691 cev
ASTM A691 longitudinal welded yeeb nkabyog cov yeeb nkab tshwj xeeb uas siv dav hauv roj av, tshuaj lom neeg, thiab hluav taws xob kev lag luam. Nws muaj qhov tshwj xeebsiab -kub tsis kam, siab - siab tiv taus, thiab corrosion kuj, feem ntau deployed nyob rau hauvsiab -kub, siab - cov kav dej siab.
astm a691 tshuaj muaj pes tsawg leeg
| 1 CR | 1-1/4 CR | 2-1/4 CR | 5 CR | 9 ib CR | 91 | |
| C | 0.05-0.17 | 0.05-0.17 | 0.05-0.15 | 0.15 | 0.15 | 0.08-0.12 |
| Mn | 0.40-0.65 | 0.40-0.65 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 |
| P | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 |
| S | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 |
| Si | 0.15-0.40 | 0.50-0.80 | 0.50 | 0.50 | 1.00 | 0.20-0.50 |
| Cr | 0.80-1.15 | 1.00-1.50 | 2.00-2.50 | 4.00-6.00 | 8.00-10.00 | 8.00-9.50 |
| Mo | 0.45-0.60 | 0.45-0.65 | 0.90-1.10 | 0.45-0.65 | 0.90-1.10 | 0.85-1.05 |
| V | – | – | – | – | 0.04 | 0.18-0.25 |
ASTM A691 sib npaug
ASTM A691 VSASTM A671 Cov Lus Qhia Tshwj Xeeb
| Sib piv Dimension | ASTM A691 Cov Lus Qhia Tshwj Xeeb | ASTM A671 Cov Lus Qhia Tshwj Xeeb |
|---|---|---|
| Lub Hom Phiaj | Chromium-molybdenum alloy hluav taws xob fusion welded yeeb nkab (rau siab-kub thiab siab- siab) | Cov pa roj carbon-manganese steel hluav taws xob fusion welded yeeb nkab (rau qis- kub thiab siab- cov xwm txheej siab) |
| Hom khoom | Muaj chromium-molybdenum alloy (piv txwv li, 1.25Cr-0.5Mo) | Carbon steel/carbon-manganese steel (tsis muaj chromium{1}}molybdenum) |
| Siv tau qhov kub thiab txias | Tsawg dua lossis sib npaug li 650 degree(rau siab -kev pabcuam kub) | Tsawg dua los yog sib npaug li 300 degree(rau qis-kev pabcuam kub) |
| Qib Qib | Qib 80/90 (550-620 MPa) | Qib 60/65 (415-485 MPa) |
| Txheej txheem tseem ceeb | Yuav tsum normalizing kev kho mob(cov nplej refinement) | Tswj dov lossis normalizing (yeem) |
| Kev soj ntsuam yuav tsum tau | 100% siab -kub tensile test + hardness scan | Tsawg- ntsuas qhov kub thiab txias (-46 degree) |
| Corrosion Resistance | Oxidation / sulfidation corrosion kuj (qhov zoo ntawm Cr-Mo alloy) | Relies on coatings/corrosion inhibitors |
| Tej kev siv | Cov kav dej tseem ceeb hauv cov chaw tsim hluav taws xob Hydrorefining reactors nyob rau hauv refineries |
LNG qis-kub pipelines Tsawg-kub cia tank hauv kev lag luam tshuaj |
| Tus nqi sib txawv | Siab (vim alloy nqi thiab kev kho cua sov) | Nruab nrab mus rau qis |
Daim ntawv thov ntawm A691 Steel Pipes
- Kev lag luam roj thiab roj: A691 steel kav yog dav siv nyob rau hauv cov roj thiab cov kav xa hluav taws xob, ua cov haujlwm tseem ceeb hauv kev thauj mus los thiab ua kom muaj kev ruaj ntseg ntawm cov khoom siv hluav taws xob.
- Kev lag luam tshuaj: Vim nws muaj zog corrosion kuj, A691 steel kav yog dav siv nyob rau hauv cov txheej txheem chemical pipelines kom muaj kev nyab xeeb thiab ruaj khov ntawm cov chaw tsim khoom.
- Kev Tsim Kho Kev Tsim Kho: Hauv kev tsim kho kev lag luam, A691 steel kav yog siv rau kev txhawb nqa thiab lwm yam kev siv, muab kev tiv thaiv txhim khu kev qha rau cov haujlwm tsim kho vim lawv lub zog thiab ruaj khov.
- Machinery Manufacturing: Raws li cov khoom siv rau cov khoom siv kho tshuab, A691 steel kav yog siv rau hauv kev tsim khoom ntawm ntau yam khoom siv tshuab, ua kom muaj kev ua haujlwm zoo thiab kev pabcuam lub neej ntawm cov tshuab.
A691 Alloy Steel EFW LSAW PipesHoobkas
