API 5CT N80 Casing Thiab Tubing Pipe
Khoom Taw Qhia
API 5CT N80 casing thiab tubing yog anruab nrab - mus rau - siab zogroj zoo tubing tsim raws li American Petroleum Institute (API) cov qauv. Nws yog dav siv nyob rau hauv sib sib zog nqusqhov dej thiab cov roj thiab roj extraction nyob rau hauv complex geological ib puag nciglos txhawb lub qhov dej (casing) thiab thauj roj thiab roj (tubing), muab lub zog tensile zoo heev thiab tag nrho cov nqi- ua tau zoo.
API 5CT N80 Casing Pipe Chemicals thiab mechanical zog
Cov ntsiab lus tshuaj muaj pes tsawg leeg ntawm N80 steel yog raws li nram no: (unit: %), carbon cov ntsiab lus 0.28-0.32 (0.22-0.29 rau sab diameters ntau dua 9 5/8 nti / 244.48 mm), silicon ntsiab lus 0.17-0.37, manganese cov ntsiab lus 1.301.3 zoo tshaj li txoj kab uas hla 1.45 9 5/8 nti/244.48 mm), siab tshaj chromium ntsiab lus 0.25, siab tshaj nickel ntsiab lus 0.20, siab tshaj tooj liab ntsiab lus 0.20, vanadium ntsiab lus 0.07-0.12, siab tshaj phosphorus ntsiab lus 0.025, siab tshaj sulfur ntsiab lus 0.020.
Yield zog rau N80 hom Q thiab hom 1, yog 552 Mpa rau 758 Mpa. Lub zog tensile yam tsawg kawg nkaus yuav tsum yog 689 Mpa.
Sab nraud txoj kab uas hla: 5 1/2", 6 5/8", 7", 7 5/8", 7 3/4", 8 5/8", 9 5/8", 10 3/4", 11 3/4", 13 3/8", 16", 18 5/8",
Thickness: 14 LB / FT rau 106.59 LB / FT, 0.244 "- 0.875"
API 5CT N80 OCTG Casing Tube Classification thiab Manufacturing Process
N80Q yuav tsumundergo quenching + tempering, thaum N80-1 siv normalizing lossis normalizing + tempering - qhov no yog lub hauv paus ua rau tag nrho cov kev ua tau zoo sib txawv.
| Classification Dimension | Paub meej |
| Txoj kev tsim khoom | Seamless vs ERW/HFW - N80 kuj muaj raws li HFW casing |
| Xov Hom | STC (Short Thread Coupling) vs LTC (Long Thread Coupling); SY/T6194-96 |
| Economy Qib N80 | Kev kho cua sov kom zoo kom txo tau tus nqi thaum tshaj API 5CT cov cai |
| Qhuav Flow | Nruam Casting → Piercing & Rolling → Quenching & Tempering / Normalizing → Surface Treatment → 100% NDT |
API 5CT N80 roj tubing Metallographic Structure
Qhov no yog qhovvim li casQhov txawv ntawm N80-1 los ntawm N80Q:
| Qib | Hom Microstructure | Kev pheej hmoo tsis zoo |
| N80-1 | Ferrite (F) + Pearlite (P) + Minor Bainite (B) → P + F lossis B + P + F | Coarse network ferrite, lamellar martensite (hnyav txo qhov cuam tshuam toughness), overheated Widmanstätten qauv, nto decarburization |
| N80Q | Tempered Sorbitetseem ceeb | Ntau hom qauv, superior toughness |
API 5CT N80 Roj Tubing Cov Khoom Muag Khoom Zoo
API 5CT ua haujlwm ntau dua li kev sim tensile nkaus xwb:
| Cov khoom soj ntsuam | Standard Reference | Sau ntawv |
|---|---|---|
| Hydrostatic Test | API 5 CT | Yuav tsum tau - txheeb xyuas qhov siab- bearing peev |
| Flattening Test | GB246 / API 5CT | Txheeb xyuas qhov tawg tsis kam |
| Tensile Test | GB228 / ASTM E8 | UTS, Yield Strength, Elongation |
| Impact Test (Charpy) | ASTM E23 | Yuav tsum tau rau N80Q; N80-1 PSL-1 tuaj yeem raug zam |
| Hardness Test | ASTM E18 / E10 | N80 Tsawg dua lossis sib npaug rau 241 HB |
| SSC Test (Sulfide Stress Cracking) | NCEES TM0177 | Yuav tsum tau kev pab qaub |
| Sib Nqus Particle Test (MT) | ASTM E709 / E3024 | 100% nto + kev soj ntsuam kawg |
| Kev kuaj ultrasonic (UT) | ASTM E 213 | Internal defect nrhiav pom |
| Grain Size Determination | ASTM E112 | Tswj microstructural uniformity |
| Drift Test (Caliper) | API 5 CT | Yam tsawg kawg drift txoj kab uas hla=Nominal ID − 3.18 mm (casing D<244.5mm) |
API 5CT N80 OCTG Casing Tube Length ranges
Cov casing hauv tsev yog qhov ntev, feem ntau 8 ~ 13m; Cov kav dej Ntau dua lossis sib npaug li 6m tso cai tab sis Tsawg dua lossis sib npaug li 20% ntawm tag nrho.
| Ntau yam | Lub npe | Lub sijhawm |
| R-1 | 4.88 ~ 7.62 m | Lub cev luv |
| R-2 | 7.62 ~ 10.36 m | Nruab nrab ntev (hauv tsev mainstream: 8 ~ 13m) |
| R-3 | Ntau dua lossis sib npaug li 10.36 m | Cov yeeb nkab ntev |
| Tubing | 6.10~7.32m / 8.53~9.75m | - |
API 5CT N80 OCTG Casings Corrosion Resistance
| Corrosion Hom | N80 Performance | Sau ntawv |
| CO₂ Corrosion | Nruab nrab | Normalizing tshav kub kho me ntsis txhim kho kuj |
| H₂S Corrosion (SSC) | Yuav tsum tau SSC kuaj xyuas | Siab dua Cl⁻ concentration → qaug zog |
| General Corrosion | Ua tau raws li cov kev pabcuam qub | Cr 2 ~ 5% kev lag luam tiv thaiv -CO₂ tubing ua lwm txoj |
API 5CT N80 casing yeeb nkab ntawv pov thawj
API 5CT N80 OCTG casing txheej txheem kab
FAQ
1.Dab tsi xov hom muaj rau N80 casing? Qhov twg yog qhov zoo tshaj?
N80 casing muaj nyob nrog STC, LTC, BTC, thiab hwm kev sib txuas. STC yog qhov ntau tshaj plaws thiab tus nqi - zoo. LTC muab kev sib khi zoo dua. Rau qhov xav tau ib puag ncig, kev sib txuas hwm zoo tau pom zoo rau kev pleev xim sai dua, tsis muaj kev hla - xov, thiab kev khoov zoo dua.
2.Qhov kev tshuaj xyuas dab tsi yog qhov yuav tsum tau ua rau N80 casing raws li API 5CT?
Txhua N80 casing yuav tsum xeem dhau hydrostatic test, flattening test, tensile test, 100% MT (nto + xaus), UT, thiab drift test. N80Q yuav tsum tau yuav tsum tau Charpy impact test. Kev pabcuam qaub ntxiv yuav tsum tau xeem SSC rau NACE TM0177.
3.Dab tsi yog qhov txawv ntawm N80-1 thiab N80Q? Kuv yuav tsum xaiv qhov twg?
Qhov tseem ceeb sib txawv yogKev kho cua sov. N80-1 siv normalizing nrog ferrite + pearlite microstructure, qis toughness, thiab qis nqi. N80Q siv quenching + tempering nrog tempered sorbite microstructure, muaj zog dua, thiab superior SSC kuj. Xaiv N80Q rau kev pabcuam qaub, H₂S, lossis ultra{11}} qhov dej tob. Xaiv N80-1 rau cov qhov dej tsis muaj qaub uas tus nqi yog qhov tseem ceeb.
Cim npe nrov: api 5ct n80 casing thiab tubing yeeb nkab, Tuam Tshoj api 5ct n80 casing thiab tubing yeeb nkab manufacturers, lwm tus neeg, Hoobkas
Koj Tseem Yuav Zoo Li
Xa kev nug