ASTM A672 B60 / B70 / C60 / C65 / C70 LSAW (JCOE) Carbon Steel Pipe yogsiv nyob rau hauv high-pressure mob thiab mas siv nyob rau hauv fais fab nroj tsuag, offshore roj kev lag luam, tshuaj kev lag luam, Fertilizer, petrochemicals, refineries thiab lwm yam.
ASTM A672 B60/B70/C60/C65/C70LSAW (JCOE) Carbon Steel Yeeb Nkabyuav tsum tau muab ob npaug rau-welded, tag nrho-ntev welds ua raws li cov txheej txheem thiab los ntawm welders los yog vuam tswv tsim nyog raws li ASME Boiler thiab siab Vessel Code, Tshooj IX.
Tag nrho cov chav kawm uas tsis yog 10, 11, 12 thiab 13 yuav tsum tau kho cua sov hauv qhov cub tswj kom ± 15 ℃ thiab nruab nrog lub ntsuas dej ntsuas kom cov ntaub ntawv cua sov muaj.
Chaw tsim khoom:Longitudinally Submerged Arc Vuam (LSAW).
Loj:OD: 406 ~ 1422mm WT: 8 ~ 60mm.
Qib:B60, C60, C65, thiab lwm yam.
Ntev:3-12M lossis ntev raws li xav tau.
Xaus:Plain End, Beveled kawg, Grooved.
| Cov Lus Qhia Tshwj Xeeb rau ASTM A672 B60 / B70 / C60 / C65 / C70 LSAW Carbon Steel Pipe | ||||||||||||
| Yeeb | Qib | Kev sib xyaw,% | ||||||||||
| C max | Mn | P max | S max | Si | Lwm tus | |||||||
| <=1 in (25 hli) | > 1 ~ 2 hauv (25 ~ 50 hli) | > 2 ~ 4in (50-100mm) | > 4 ~ 8 hauv (100 ~ 200 hli) | > 8 hauv (200 hli) | <= 1/2 po (12.5 hli) | > 1/2 nyob rau hauv (12.5 hli) | ||||||
| 60 | 0.24 ib | 0.21 ib | 0.29 ib | 0.31 Nws | 0.31 Nws | 0.98 max | 0.035 ib | 0.035 ib | 0.13–0.45 dr hab | ... | ||
| 65 | 0.28 ib | 0.31 Nws | 0.33 ib | 0.33 ib | 0.33 ib | 0.98 max | 0.035 ib | 0.035 ib | 0.13–0.45 dr hab | ... | ||
| 70 | 0.31 Nws | 0.33 ib | 0.35 Nws | 0.35 Nws | 0.35 Nws | 1.30 max | 0.035 ib | 0.035 ib | 0.13–0.45 dr hab | ... | ||
| C | 55 | 0.18 | 0.20 ib | 0.22 | 0.24 ib | 0.26 | 0.55–0.98 Nws | 0.55–1.30 Nws | 0.035 ib | 0.035 ib | 0.13–0.45 dr hab | ... |
| 60 | 0.21 ib | 0.23 | 0.25 | 0.27 ib | 0.27 ib | 0.55–0.98 Nws | 0.79–1.30 Nws | 0.035 ib | 0.035 ib | 0.13–0.45 dr hab | ... | |
| 65 | 0.24 ib | 0.26 | 0.28 ib | 0.29 ib | 0.29 ib | 0.79–1.30 Nws | 0.79–1.30 Nws | 0.035 ib | 0.035 ib | 0.13–0.45 dr hab | ... | |
| 70 | 0.27 ib | 0.28 ib | 0.30 Nws | 0.31 Nws | 0.31 Nws | 0.79–1.30 Nws | 0.79–1.30 Nws | 0.035 ib | 0.035 ib | 0.13–0.45 dr hab | ... | |
| Mechanical Properties | |||||||
| Qib | |||||||
|
| B60 | B65 | B70 | C55 | C60 | C65 | C70 |
| Tensile zog, min: | |||||||
| ksi ua | 60 | 65 | 70 | 55 | 60 | 65 | 70 |
| Mpa | 415 | 450 | 485 ib | 380 | 415 | 450 | 485 ib |
| Yield zog, min: | |||||||
| ksi ua | 32 | 35 | 38 | 30 | 32 | 35 | 38 |
| MPa | 220 | 240 | 260 | 205 | 220 | 240 | 260 |
| Elongation Requirements: Raws li tus qauv | |||||||
1. Sab nraud txoj kab uas hla-raws li qhov ntsuas qhov ntsuas ± 0.5% ntawm qhov ntsuas sab nraud.
2. Out-of-Roundness-Sib txawv ntawm qhov loj thiab me sab nraud diameters.
3. Alignment-Siv ib tug 10 ft (3m) straightedge muab tso kom ob hnub nyob rau hauv kev sib cuag nrog cov yeeb nkab, 1/8 nyob rau hauv. (3mm).
4. Thickness-Qhov tsawg kawg nkaus phab ntsa thickness ntawm txhua qhov chaw hauv cov yeeb nkab yuav tsum tsis txhob ntau tshaj 0.01 nyob rau hauv. (0.3mm) raws li teev nominal thickness.
5. Lengths nrog unmachined kawg yuav tsum nyob rau hauv -0, + 1/2 nyob rau hauv. (-0, + 13mm) ntawm qhov teev.Ntev nrog machined kawg yuav tsum yog raws li kev pom zoo ntawm cov chaw tsim khoom thiab cov neeg yuav khoom.
Tension Test-Transverse tensile zog ntawm cov welded sib koom yuav tsum tau raws li qhov tsawg kawg nkaus yuav tsum tau rau qhov kawg tensile lub zog ntawm cov ntaub ntawv phaj.
Transverse-guided-weld-bent tests -Qhov kev ntsuam xyuas khoov yuav tsum tau txais yog tias tsis muaj qhov tawg lossis lwm yam tsis xws luag tshaj 1/8 nyob rau hauv. (3mm) nyob rau hauv ib qho kev taw qhia muaj nyob rau hauv lub vuam hlau los yog nruab nrab ntawm lub vuam thiab lub hauv paus hlau tom qab khoov.
Xov tooj cua-graphic Examination-Qhov ntev ntawm txhua qhov vuam ntawm chav kawm X1 thiab X2 yuav tsum tau kuaj xyuas hluav taws xob raws li thiab ua tau raws li cov cai ntawm ASME Boiler thiab Pressure Vessel Code, Tshooj xya, kab lus UW-51.
Cov yeeb nkab ua tiav yuav tsum tsis muaj qhov raug mob thiab yuav tsum muaj cov neeg ua haujlwm tiav.
A. Chaw tsim khoom lub npe lossis cim.
B. Specification naj npawb (xyoo-hnub los yog xav tau).
C. Loj (OD, WT, ntev).
D. Qib (A lossis B).
E. Hom yeeb nkab (F, E, lossis S).
F. Ntsuas siab ( seamless steel yeeb nkab nkaus xwb).
G. Kub naj npawb.
H. Cov ntaub ntawv ntxiv uas tau teev tseg hauv daim ntawv xaj yuav khoom.
● Bare yeeb nkab los yog Dub / Varnish txheej / Epoxy txheej / 3PE txheej (raws li cov neeg siv khoom xav tau);
● 6 "thiab hauv qab hauv pob nrog ob lub paj rwb slings;
● Ob leeg xaus nrog qhov kawg tiv thaiv;
● Plain kawg, bevel kawg (2 "thiab saum toj no nrog bevel xaus, degree: 30 ~ 35 °), threaded thiab coupling;
● Kos npe.
