API 5L Qib B Yeeb Nkab Daim Ntawv Qhia

API 5L Qib B seamless steel yeeb nkab yog hom dav siv seamless steel yeeb nkab hauv kev lag luam roj thiab roj. API 5L yog tus qauv tsim los ntawm American Petroleum Institute (API) los tswj cov kav hlau kav; tus "L" hauv "5L" sawv rau Kab. Cov qauv no suav nrog ob leeg seamless thiab welded steel kav, thiab Qib B yog qib steel tshwj xeeb. API 5L tus qauv tau hloov kho tsis tu ncua kom hloov mus rau kev tsim kho kev lag luam thiab kev txhim kho thev naus laus zis, kom ntseeg tau tias qhov zoo thiab kev ua tau zoo ntawm cov kav hlau steel hauv qhov chaw hnyav xws li kev thauj mus los roj thiab roj.

Cov tshuaj muaj pes tsawg leeg ntawm API 5L Qib B seamless steel yeeb nkab

Cov pa roj carbon (C): Cov ntsiab lus feem ntau yog tswj nyob rau hauv ib qho chaw, feem ntau tsis tshaj 0.28%. Qhov tsim nyog ntawm cov pa roj carbon ntau pab ua kom lub zog ntawm cov hlau.

Manganese (Mn): Cov ntsiab lus tsis pub tshaj 1.20%. Manganese tuaj yeem txhim kho lub zog thiab tawv ntawm cov hlau thiab, rau qee qhov, tshem tawm cov teeb meem phom sij.

Sulfur (S) thiab Phosphorus (P): Cov no yog cov khoom tsis zoo, thiab lawv cov ntsiab lus nruj me ntsis txwv. Feem ntau, cov ntsiab lus sulfur tsis pub tshaj 0.03%, thiab cov ntsiab lus phosphorus tsis tshaj 0.03%, kom ntseeg tau tias cov hlau zoo thiab kev ua haujlwm zoo.

CHEMICAL	LIMITS	C	Mn	P	S	Cu	Ni	Cr	Mo
API 5L Gr.B	MIN
API 5L Gr.B	MAX	0.28	1.20	0.03	0.03	0.5	0.5	0.5	0.15

Mechanical zog ntawm API 5L Qib B seamless steel yeeb nkab

Yield zog: Lub zog tawm los yog 240 MPa, txhais tau hais tias nyob rau hauv siab, cov yeeb nkab steel yuav tuav elastic deformation ua ntej mus txog qhov kev ntxhov siab no, thiab yuav pib ua cov yas deformation tom qab tshaj qhov nqi no.

Lub zog tensile: Lub zog tensile yog 415 MPa, uas sawv cev rau qhov kev ntxhov siab uas cov khoom tuaj yeem tiv taus thaum lub sijhawm nro, cuam tshuam cov yeeb nkab steel lub peev xwm los tiv thaiv tensile tsis ua haujlwm.

KHOOM	TS (MPA)	YS (MPA)	EL %
ASTM API5LB	415 nqi	240 feeb	23 feeb

API 5L Qib B Pipe Schedule chart

DN	NPS	OD	SCH20	SCH30	STD	SCH40	SCH60	XS	80
6	1/8	10.3	-	1.45	1.73	1.73	-	2.41	2.41
8	1/4	13.7	-	1.85	2.24	2.24	-	3.02	3.02
10	3/8	17.1	-	1.85	2.31	2.31	-	3.20	3.20
15	1/2	21.3	-	2.41	2.77	2.77	-	3.73	3.73
20	3/4	26.7	-	2.41	2.87	2.87	-	3.91	3.91
25	1	33.4	-	2.90	3.38	3.38	-	4.55	4.55
32	11/4	42.2	-	2.97	3.56	3.56	-	4.85	4.85
40	11/2	48.3	-	3.18	3.68	3.68	-	5.08	5.08
50	2	60.3	-	3.18	3.91	3.91	-	5.54	5.54
65	21/2	73.0	-	4.78	5.16	5.16	-	7.01	7.01
80	3	88.9	-	4.78	5.49	5.49	-	7.62	7.62
90	31/2	101.6	-	4.78	5.74	5.74	-	8.08	8.08
100	4	114.3	-	4.78	6.02	6.02	-	8.56	8.56

PSL1 VS PSL2

Yuav tsum tau ua kom zoo thiab soj ntsuam

PSL1

Tsawg Cov Khoom Siv Tshuaj Xyuas: Kev tshuaj xyuas cov kav dej steel yog qhov yooj yim. Piv txwv li, tsuas yog kev soj ntsuam pom ntawm txhua lub yeeb nkab yog qhov yuav tsum tau ua, thiab qhov yuav tsum tau ua rau tsis yog - kev ntsuas kev puas tsuaj yog qhov yooj yim; feem ntau, tsuas yog ib qho piv txwv ntawm cov kav dej yuav tsum tau kuaj xyuas.

Qib qis ntawm Kev Tswj Xyuas Zoo: PSL1 muaj qhov yuav tsum tau qis dua rau qhov zaus ntawm kev tshuaj xyuas cov tshuaj muaj pes tsawg leeg thiab cov khoom siv tshuab piv rau PSL2. Rau qee qhov ntsuas kev ua haujlwm tseem ceeb, qhov kev hloov pauv loj loj tau tso cai.

PSL2

Kev soj ntsuam zoo thiab nruj: Kev tswj xyuas zoo ntawm cov kav hlau steel yog nruj dua. Yuav luag txhua txhua cov yeeb nkab tau dhau los ua qhov tsis zoo - kuaj kev puas tsuaj, suav nrog kev kuaj ultrasonic, kuaj cov khoom sib nqus, lossis kuaj cov kua dej, kom ntseeg tau tias cov kav dej tsis muaj kev puas tsuaj sab hauv thiab sab hauv.

Strict Performance Consistency: Kev nruj nruj yuav tsum tau ua raws li cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab. Cov kev cai nruj nruj tau teeb tsa rau txhua qhov ntsuas kev ua tau zoo ntawm txhua lub yeeb nkab, thiab qhov kev tshuaj xyuas ntau dua los xyuas kom meej qhov zoo ntawm tag nrho cov kav dej.

Daim ntawv thov Scenario

PSL1: Tsim nyog rau cov ntawv thov uas tsis tshua muaj kev xav tau rau cov kav dej zoo thiab kev ua haujlwm zoo, xws li cov kav dej ib ntus roj thiab roj, luv - cov kav dej nyob deb uas yuav tsum muaj kev nyab xeeb tsis siab, lossis hauv thaj chaw uas muaj ib puag ncig zoo thiab kev ua haujlwm ruaj khov thiab kub.

PSL2: Feem ntau siv rau hauv cov haujlwm uas xav tau siab heev rau kev nyab xeeb thiab kev ntseeg siab, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig hnyav lossis thaum thauj cov xov xwm muaj kev phom sij heev. Cov ntawv thov no xav tau cov kav dej steel kom tiv taus cov xwm txheej hnyav xws li kev kub siab, qis kub, thiab muaj zog corrosion. PSL2 qib steel kav, nrog rau lawv cov kev ua tau zoo dua thiab cov qauv kev ua tau zoo, tuaj yeem ua tau raws li cov kev xav tau nruj me ntsis, ua kom lub sijhawm ntev - lub sijhawm ua haujlwm ruaj khov ntawm cov kav dej.