Nkag siab Flange Rating
Ua ntej, peb yuav tsum tsim qhov "kev ntsuas" txhais tau li cas hauv cov ntsiab lus piping. Lub flange qhov ntsuas tsis yog tsuas yog hais txog nws lub cev qhov ntev; nws yog ib qho kev ntsuas ntawm nws qhov siab tshaj plaws tso cai ua hauj lwm siab ntawm qhov muab kub.
Cov lus thoob ntiaj teb rau qhov no hauv North America thiab ntau lub ntiaj teb yog tus qauv ASME B16.5: Yeeb Nkab Flanges thiab Flanged Fittings. Tus qauv no tswj flanges los ntawm Nominal Pipe Size (NPS) 1/2 txog 24 ntiv tes. Hauv ASME B16.5, flanges tau muab faib ua xya lub hauv paus hauv chav kawm:
150. A Class 150 flange tsis raug ntsuas rau 150 psi ntawm txhua qhov kub; nws qhov ntsuas poob qis thaum qhov kub nce.
Deconstructing qhov ntsuas ntawm 304L Flanges
304L stainless hlauyog qhov qis- carbon version ntawm 304 alloy. Qhov no cov ntsiab lus qis dua (0.03% max) txo qhov kev pheej hmoo ntawm carbide nag lossis daus thaum vuam, yog li txhim kho nws cov corrosion kuj nyob rau hauv raws li -welded tej yam kev mob. Qhov no ua rau nws ua haujlwm rau cov tshuaj chemical, tshuaj, thiab zaub mov kev lag luam.
Hauv ASME B16.5 tus qauv, 304L raug cais raws li Cov Khoom Siv Tsis Muaj . 1.9. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov no yog ib pab pawg sib txawv ntawm tus qauv 304 (Group 1.5). Qhov kev sib txawv no yog qhov tseem ceeb vim tias qhov kev ntsuas siab sib txawv.
Cia peb tshuaj xyuas qhov tshwj xeeb siab- qhov ntsuas kub rau 304L flange. Cov lus hauv qab no, muab los ntawm ASME B16.5, qhia txog qhov siab tshaj plaws ua haujlwm siab rau chav kawm 150, 300 thiab 600 304L flange ntawm ntau qhov kub thiab txias.
|
Kub (degree F) |
Chav Kawm 150 |
Chav Kawm 300 |
Chav Kawm 600 |
|
-20 rau 100 |
230 |
600 |
1,200 |
|
200 |
195 |
510 |
1,020 |
|
300 |
175 |
455 |
910 |
|
400 |
160 |
420 |
840 |
|
500 |
150 |
395 |
785 |
|
600 |
140 |
370 |
745 |
|
650 |
125 |
365 |
730 |
|
700 |
110 |
360 |
720 |
|
750 |
95 |
355 |
705 |
|
800 |
80 |
345 |
690 |
|
850 |
65 |
340 |
675 |
Chav Kawm 900, 1500, thiab 2500 Kev Ntsuas
|
Kub (degree F) |
Chav Kawm 900 |
Chav Kawm 1500 |
Chav Kawm 2500 |
|
-20 rau 100 |
1,800 |
3,000 |
5,000 |
|
200 |
1,535 |
2,555 |
4,260 |
|
300 |
1,370 |
2,280 |
3,800 |
|
400 |
1,260 |
2,100 |
3,500 |
|
500 |
1,180 |
1,970 |
3,280 |
|
600 |
1,115 |
1,860 |
3,100 |
|
650 |
1,095 |
1,825 |
3,040 |
|
700 |
1,080 |
1,800 |
3,000 |
|
750 |
1,060 |
1,765 |
2,940 |
|
800 |
1,035 |
1,730 |
2,880 |
|
850 |
1,015 |
1,690 |
2,820 |
Nco ntsoov qhov kev loj hlob ntawm qhov kub thiab txias: ntawm 100℃F, chav kawm 150 304L flange tuav 230 psig, tab sis qhov no poob rau 80 psig ntawm 800℃F.
304L vs . 304: Ib qho tseem ceeb ntawm qhov kev ntsuam xyuas
Thaum lawv muaj cov tshuaj zoo sib xws, lawv cov kev ntsuas sib txawv vim yog ASME code kev kho cov khoom siv zog ntawm qhov kub siab.
Raws li pom nyob rau hauv cov ntaub ntawv los ntawm ASME B16.5, ntawm 100℃F, tus qauv 304 flange (Pab 1.5) yog nyob ntawm 275 psi rau Class 150, whereas 304L flange (Pab 1.9) yog nyob ntawm 230 psi. Lub 304L flange muaj qhov ntsuas qis me ntsis ntawm qhov kub thiab txias.
Txawm li cas los xij, qhov kev lag luam me me no- tawm hauv qhov ntsuas siab ntawm qhov kawg sab saum toj kawg nkaus coj qhov zoo dua: superior weldability thiab intergranular corrosion kuj. Rau cov haujlwm uas cuam tshuam nrog kev sib txuas ntawm ntau qhov chaw vuam lossis kev pabcuam hauv qhov chaw corrosive, lub sijhawm ntev - kev ntseeg siab ntawm 304L deb tshaj qhov me me pib qhov sib txawv.
Xaiv txoj cai 304L Flange
To taub qhov ntsuas yog kauj ruam ib. Kauj ruam ob yog txuam qhov kev ntaus nqi rau koj daim ntawv thov tshwj xeeb.
Cov xwm txheej ua haujlwm:Koj yuav tsum xaiv cov chav kawm flange uas qhov siab tshaj plaws tso cai ntawm koj qhov kev khiav hauj lwm kub siab tshaj koj lub siab ua haujlwm siab tshaj plaws. Ib txwm suav nrog cov npoo kev nyab xeeb.
Flange Hom:Qhov kev ntsuam xyuas siv txawm hais tias koj tab tom siv Slip-On, Weld Neck, Socket Weld, lossis Dig muag flange, yog tias lawv tau forged rau tib yam khoom tshwj xeeb (ASTM A182) thiab qhov ntev (ASME B16.5). Txawm li cas los xij, hom cuam tshuam rau hub geometry thiab kev sib txuas ncaj ncees.
Standards Ua raws li:Xyuas kom koj tus neeg muag khoom muab flanges tag nrho traceable rau ASTM A182 rau tshuaj thiab txhua yam khoom, thiab dimensionally raws li ASME B16.5. Hauv peb qhov chaw, peb nruj me ntsis ntsuas txhua qhov cua sov kom lav ua raws li cov qauv nruj no.
Nqi vs. Performance:Thaum Class 300 flange muaj qhov ntsuas siab dua, nws hnyav dua thiab kim dua li Chav Kawm 150. Tshaj - qhia txog cov nqi tsis tsim nyog; nyob rau hauv - kev qhia tshwj xeeb yog kev nyab xeeb. Siv cov rooj ntsuas ntsuas los nrhiav qhov pom kev sib tw.
Xaus
Qhov ntsuas ntawm 304L flange yog qhov tshwj xeeb dynamic, tsis yog tus lej zoo li qub. Nws yog txhais los ntawm kev sib cuam tshuam ntawm nws cov khoom siv (ASME Group 1.9), nws chav kawm siab (150, 300, thiab lwm yam), thiab qhov system kub, raws li tswj hwm los ntawm ASME B16.5.
Thaum koj tau txais 304L flanges los ntawm peb lub Hoobkas, koj tsis yog tsuas yog tau txais ib daim hlau forged. Koj tau txais cov khoom lag luam raug tsim kho, txhawb nqa los ntawm cov khoom siv traceability, ua raws li nruj me ntsis kam rau ua, thiab nkag siab tob txog cov qauv uas lav nws qhov kev ua tau zoo.
Peb xyuas kom meej tias qhov ntsuas 230 psi ntawm Chav Kawm 150 flange ntawm 100℃F tsis yog tus lej ntawm nplooj ntawv xwb, tab sis muaj ntawv pov thawj tseeb hauv koj cov kav dej.
