1. "H40" txhais li cas?
Lub npe "H40" yog los ntawmAPI 5Lspecification, uas yog tus txheej txheem thoob ntiaj teb rau kab yeeb nkab siv hauv kev lag luam roj thiab roj rau kev thauj mus los.
"H": Sawv rau "Helicoidal, "keeb kwm hais txog cov kav dej uas tau sim siv lub helical (kauv) seam test. Txawm li cas los xij, nyob rau hauv cov ntsiab lus ntawm API 5L, nws tsuas yog txhais tau tias yog ib qho helical (spiral) seam test.qeb tshwj xeeb.
"40": Xa mus rauyam tsawg kawg nkaus yield zogntawm cov hlau. Rau H40, qhov no yog40,000 psi(Pounds ib square Inch).
Key Takeaway:H40 Seamless Steel Yeeb Nkab yog cov yeeb nkab uas tsis muaj vuam seam, tsim los rau API 5L cov qauv, nrog rau qhov tsawg kawg nkaus lub zog ntawm 40,000 psi.
2. Cov ntsiab lus tseem ceeb thiab cov qauv
Primary Standard: API 5L(American Petroleum Institute Specification 5L). Qhov no yog tus qauv tshaj plaws thiab tseem ceeb tshaj plaws rau cov yeeb nkab no.
Kev tsim khoom: Seamless(SMLS). Cov yeeb nkab yog tsim los ntawm kev tho lub pob zeb ntawm cov hlau los tsim lub plhaub hollow, uas yog tom qab ntawd elongated thiab dov mus rau qhov kawg loj. Cov txheej txheem no tsim cov yeeb nkab nrog lub zog tsis sib xws nyob ib ncig ntawm nws qhov ncig thiab tsis muaj qhov tsis muaj zog ntawm lub vuam seam.
Qib: PSL1(Product Specification Level 1). PSL1 yog tus qauv theem nrog cov txheej txheem tshuaj lom neeg thiab cov khoom siv kho tshuab.
3. Chemical Composition thiab Mechanical Properties
Cov khoom yog txhais los ntawm API 5L tus qauv rau PSL1 qib.
Chemical Composition (Max%):
API 5L PSL1 muaj kev tsom mus rau cov khoom siv kho tshuab ntau dua li cov tshuaj lom neeg nruj heev. Txawm li cas los xij, tus nqi siab tshaj plaws rau cov pa roj carbon, manganese, thiab lwm yam khoom raug tswj kom ua tiav lub zog xav tau. Qhov tseeb muaj pes tsawg leeg tuaj yeem sib txawv los ntawm cov chaw tsim khoom.
Mechanical Properties:
| Khoom | Tus nqi | Chav tsev |
|---|---|---|
| Yam tsawg kawg Yield Strength | 40,000 | psi (275 MPa) |
| Yam tsawg kawg Tensile Strength | 60,000 | psi (414 MPa) |
| Elongation | Nws txawv raws li phab ntsa thickness thiab hom qauv, tab sis yog ib qho khoom yuav tsum tau muaj. | % |
4. Qhov zoo ntawm Seamless Yeeb Nkab (vs. Welded)
Txij li cov yeeb nkab yog seamless, nws tau txais tag nrho qhov zoo ntawm cov txheej txheem tsim seamless:
Tsis Siv Neeg Weld:Tshem tawm txoj kev pheej hmoo ntawm cov vuam tsis xws luag, ua rau nws txhim khu kev qha rau siab - cov ntawv thov siab.
Uniform Strength:Nws muaj cov khoom siv kho tshuab zoo ib yam thiab microstructure nyob ib puag ncig nws tag nrho ib puag ncig.
Zoo dua rau High Pressure:Cov qauv homogeneous ua rau nws zoo tagnrho rau kev muaj lub siab sab hauv.
Greater Formability:Muaj peev xwm tiv taus ntau dua deformation thiab tsis tshua muaj peev xwm ua tsis tau ntawm lub seam.
Qhov ntau thiab tsawg (hauv thickness):Cov kav dej seamless tuaj yeem tsim nrog cov phab ntsa hnyav dua li cov kav dej welded.
5. Kev siv ntau
H40 seamless yeeb nkab yog dav dav - lub hom phiaj, qis - mus rau - nruab nrab lub zog yeeb nkab siv nyob rau hauv ntau yam lag luam:
Roj thiab Roj Kis:
Sib sau cov kab (los ntawm lub qhov taub mus rau cov chaw ua haujlwm).
Cov kab khiav.
Tsawg- cov roj av siab thiab cov kav dej xa hluav taws xob.
Kev siv tus qauv:
Siv los ua cov khoom siv hauv kev tsim kho, scaffolding, thiab kev txhawb nqa txhua qhov uas lub zog siab tsis yog qhov tseem ceeb.
Industrial Fluid Transportation:
Rau kev thauj cov dej, huab cua, chav, thiab lwm yam dej hauv kev lag luam hauv cov kav dej.
Piling:
Siv los ua pawg hauv paus hauv kev tsim kho.
6. Sib piv nrog lwm yam API 5L Qib
H40 yog nyob rau hauv qis kawg ntawm lub zog spectrum rau kab yeeb nkab. Nov yog qhov nws piv rau lwm cov qib sib xws:
| Qib | Min. Yield zog (psi) | Min. Yield zog (MPa) | Hom Siv Case |
|---|---|---|---|
| A25 | 25,000 | 172 | Tsawg heev -siab, tsis yog- cov kev pabcuam tseem ceeb. |
| H40 / A | 40,000 | 275 | Lub hom phiaj dav dav, qis - kab siab. |
| B | 35,000 | 241 | Muaj ntau heev rau nruab nrab - daim ntawv thov haujlwm. |
| X42 | 42,000 | 290 | Ib kauj ruam los ntawm qib B, siv nyob rau hauv ntau cov kab sib kis. |
| X52 | 52,000 | 358 | Feem ntau rau siab - roj thiab roj kis tau tus mob. |
| X70 | 70,000 | 483 | High-lub zog yeeb nkab rau kev thov, siab - cov ntawv thov siab. |
Nco tseg:"A" thiab "B" yog qib ib txwm muaj, thaum qib "X" qhia tias siab dua - lub zog steels. H40 yog qhov zoo sib xws rau cov laus "A" qib.
Cov ntsiab lus
IbH40 Seamless Steel Yeeb Nkabyog ib qho kev ntseeg siab, dav dav - lub hom phiaj yeeb nkab paub txog nws:
Seamless kev tsim kho(tsis muaj vuam seam, siab siab ncaj ncees).
Lub zog nruab nrab(40,000 psi yield zog).
Ua raws li API 5L(tus qauv ntsuas rau kab yeeb nkab zoo).
Nws yog tus nqi -kev daws teeb meem zoo rau qis-rau- nruab nrab cov kav dej siab hauv cov roj, roj, thiab kev lag luam dav dav uas tsis tsim nyog rau qib ultra- siab zog ntawm "X" qib. Thaum muab cov yeeb nkab no, nco ntsoov thov daim ntawv pov thawj zeb xeem (MTC) los xyuas kom meej tias nws ua tau raws li API 5L specifications.
