Material Overview
ASTM A335 Giredhi P5 iferritic chromium–molybdenum alloy simbi pombi yakagadzirirwa kukwirisa-tembiricha uye pressure-inotakura sevhisi. Iine chromium mu 4-6% renji uye molybdenum yakatenderedza 0.45-0.65%, P5 inopa musanganiswa unobatsira wekupokana neoxidation, simba rekukambaira, uye weldability. Izvi zvinoita kuti ive sarudzo inoshanda yeboiler uye mitsara yeutsi, yekunatsa heater pombi, reformer uye inopisa process mitsara uko kabhoni simbi inokwira nekukasira kana kupera simba. Kana yaunzwa mune yakajairwa uye yakadzikama mamiriro, P5 inochengetedza kugadzikana kwedimensional uye kuvimbika kwemuchina pane yakareba nguva yekushanda.
Kemikari Yakaumbwa (yakajairika, %)
| Element | Zvirimo (%) | Function |
|---|---|---|
| Kabhoni (C) | Zvishoma pane kana kuenzana ne0.15 | Inopa simba, inochengetwa yakaderera kune weldability |
| Manganese (Mn) | 0.30–0.60 | Deoxidation, inovandudza kupisa kushanda |
| Silicon (Si) | 0.50–1.00 | Inotsigira oxidation resistance |
| Chromium (Cr) | 4.00–6.00 | Kuwedzera-tembiricha uye kusaita ngura |
| Molybdenum (Mo) | 0.45–0.65 | Kukambaira uye kuputika simba |
| Phosphorus (P) | Zvishoma pane kana kuenzana ne0.025 | Anochengeta kuoma |
| Sarufa (S) | Zvishoma pane kana kuenzana ne0.025 | Balanced machinability/kuoma |
| Nickel (Ni) | Zvishoma pane kana kuenzana ne0.50 | Kuwedzera kuomarara mune mamwe midhiya |
| Mhangura (Cu) | Zvishoma pane kana kuenzana ne0.40 | Kuwedzera oxidation kudzivirira |
| V, Nb | Zvishoma pane kana kuenzana ne0.02 imwe neimwe | Kunatswa kwezviyo, kugadzikana kwezviyo |
Alloy balance iyi yakadzikira pane P22/P91, saka zviri nyore kupinza uye kuPWHT, asi zvichingopa control oxidation irinani pane yakaderera{2}}Cr mamaredhi.
Mechanical Properties
| Property | Zvinodiwa | Chinangwa |
|---|---|---|
| Kusimba simba | Huru kupfuura kana kuenzana ne415 MPa (60 ksi) | Inoramba kutyoka pasi pemutoro |
| Goho simba | Yakakura kudarika kana yakaenzana ne205 MPa (30 ksi) | Inopikisa zvachose deformation |
| Elongation | Yakakura kupfuura kana kuenzana ne30% | Inobvumira kugadzirisa uye kugadzirisa |
| Kuoma | Zvisingasviki kana kuenzana ne163 HBW | Inochengeta kuoma uye kuenderana kwe weld |
Hwaro uhu hunoenderana neyakajairwa-uye-kudzikama kwekutumira mamiriro anodiwa neASTM A335.
Kugadzira uye Kurapa Kupisa
P5 inofanira kugadzirwa uye kudziya-kunyatsogadziriswa kuchengetedza-nguva yakareba kushanda patembiricha. Octal Pipe inoshandisa nzira isina musono kutanga kubva paCr yakachena-Mo mabhii. Mabhiridha anodziiswa nekuboorwa kuita makomba, obva apisa-akakungurutswa kana kutonhora{7}}anokweverwa kune dhayamita yekunze yakarongwa uye ukobvu hwemadziro. Mushure mekugadzirwa, mapaipi anogadziridzwa kusvika pa900–950 madhigirii ekukwenenzvera matrix, kunyungudutsa{11}macarbides asina kufanana uye kubvisa zvinonetsa. Nhanho inotevera yekushatisa inosvika 675-750 dhigirii inodzoreredza ductility uye inogadzirisa yakagadzikana yakadzikama ferrite-carbide chimiro. Iyi mbiri-nhanho yekupisa yekudziya ndiyo inopa P5 kutsika kwayo uye kugadzikana kweoxidation musevhisi.
Mushure mekurapwa kwekupisa, pombi yega yega inoongororwa hydrostatic, kuongororwa kwedimensional uye isiri-kuongororwa kunoparadza (ultrasonic kana eddy current sekurairwa). Mapaipi anopiwa mune yakajairwa uye yakadzikama ine yakazara kupisa traceability (EN 10204 3.1 kana 3.2), iyo yakakosha kune magetsi uye mapurojekiti ekunatsa.
Dimensional Range
| Parameter | Range / Details |
|---|---|
| Kunze Diameter | 12.7–610 mm (½–24 mukati) |
| Kukora Kwemadziro | 1.2–100 mm, kusanganisira. SCH 10–SCH 160 |
| Urefu | Kusvika 12 m (SRL / DRL / cheka-kusvika-kureba) |
| End Type | Beveled for welding kana plain end |
| OD Kushivirira | Kazhinji ± 1% (pa ASTM A999 kana chibvumirano) |
| WT Kushivirira | Kazhinji ±10% |
| Kururama | Kazhinji Zvishoma pane kana kuenzana ne0.8 mm pa m |
Uhwu uhwu hunobata mitsetse yepakati nepakati-yakasvibira uye misoro mikuru yekunatsa/makemikari.
Yepamusoro{{0}Kushanda Kwekupisa
Pasevhisi tembiricha inosvika 565 degrees (1050 degrees F), P5 inoumba compact chromium-rich oxide inononoka kuyera uye kurasikirwa nesimbi. Nekuti molybdenum inosimbisa iyo ferritic matrix, inokambaira deformation inoenda zvishoma nezvishoma pane plain carbon steel. Iyo yakanyoroveswa microstructure inobatsirawo kuramba kupisa bhasikoro uye kushatisa kwepasi, saka kupisa kwekushisa nzvimbo uye ukobvu hwemadziro zvinoramba zvichifanotaurwa pamusoro penguva dzekuongorora. Kumaapplication anoda tembiricha yakakwira kana kushushikana kwakanyanya, mainjiniya anogona kuenda kuP11 kana P22, asi pakushandisa oxidation-yakakosha, yepakati-sevhisi yetembiricha, P5 ndiyo inowanzodhura-sarudzo inoshanda.
Applications
Simba uye boiler masisitimu: mitsara yemhepo, boiler misoro, superheater uye reheater coils mune yepakati tembiricha bhendi
Kunatsa uye petrochemical zvikamu: choto uye reformer pombi, mitsara inopisa yekufambisa, flare uye misoro yekuyamura.
Zvidyarwa zvemakemikari nefetereza: -zvinochinjisa kupisa kwepamusoro, reactor uye manifolds
Oiri negasi maitiro ekugadzira: jekiseni reutsi uye mitsetse yekupisa panotsanangurwa Cr-Mo pipe
Kuenzanisa neCommon Cr-Mo Grades
| Giredhi | Cr (%) | Mo (%) | Yakajairika sevhisi maitiro |
|---|---|---|---|
| P5 | 4.0–6.0 | 0.45–0.65 | Zvirinani oxidation resistance pane-tembiricha yepamusoro, inogoneka |
| P11 | ~1–1.5 | ~0.5 | General steam/boiler pombi apo simba uye ductility zvinofanira kuenzana |
| P22 | ~2–2.5 | ~1 | Inopisa superheater / reheater mamiriro anoda yakakwira creep / kuputika kuramba |
Izvi zvinobatsira mainjiniya epurojekiti kusarudza iyo alloy chaiyo kana akati wandei ASTM A335 mamakisi anotenderwa.
Kuongorora uye Kuedzwa
Octal Pipe inoita bvunzo zvinoenderana neASTM A335 uye ASTM A999 zvinodiwa. Izvi zvinosanganisira hydrostatic test, NDT yepombi muviri uye magumo, tensile uye kuomarara verification, uye flattening/flaring bvunzo kusimbisa ductility. Impact kana radiographic kuyedzwa kunogona kuwedzerwa kana iyo purojekiti yakatarwa ichidaidza kirasi yepamusoro yekuongorora. Yese mhedzisiro yebvunzo inopfupikiswa muzvigayo bvunzo zvitupa uye mapaipi akamakwa kuti anyatso kuzivikanwa.
Sei Octal Pipe
Inopa chaiyo ASTM/ASME A335 P5 isina musono pombi mune yakajairika uye yakadzikama mamiriro
Yakazara dimensional, mechaniki uye NDT marekodhi akakodzera simba, kunatsa uye makemikari mapurojekiti
Tumira kunze-kurongedza kwagadzirira, kudzivirira nekumaka
Kugona kugovera magiredhi ari padyo (P11, P22) yemapaipi uye boiler masisitimu ane tembiricha nzvimbo dzakasiyana.
Zvirimo uye zvakamisikidzwa zvakanyorwa muchigadzirwa-chekutanga, chimiro chehunyanzvi chakakodzera kushambadza pawebhu uye kutsvaga indexing
FAQ
Q1: Chii chinonzi ASTM A335 P5 pombi inoshandiswa?
Q2: "5Cr-0.5Mo" inorevei kune P5 chrome moly pombi?
Q3: Chii chinonzi weld-pombi yakaenzana neASTM A335 P5?
Q4: Ndinosarudza sei P5 vs P9 vs P11 vs P22?
Certifications
CE Certificate
ISO 9001 Chitupa
API Q1 Chitupa
ABS Chitupa
AP-5L Chitupa
API-5CT Chitupa
