ASTM A214 steel tubing yog hluav taws xob-kuj-welded carbon steel tubing siv rau hauv cov khoom siv hluav taws xob sib hloov, condensers, thiab cov khoom siv hluav taws xob zoo sib xws.Nws feem ntau yog siv rau steel tubing nrog ib txoj kab uas hla sab nraud tsis ntau dua 3in [76.2mm].
Feem ntau siv cov yeeb nkab steel loj yogtsis loj dua 3in [76.2mm].
Lwm qhov ntau thiab tsawg ntawm ERW steel yeeb nkab yuav raug muab tso rau, muab cov yeeb nkab no ua tau raws li tag nrho lwm cov kev cai ntawm qhov kev qhia no.
Cov khoom uas muaj nyob rau hauv qhov kev qhia tshwj xeeb no yuav tsum ua raws li qhov yuav tsum tau ua ntawm tam sim no tsab ntawm Specification A450 / A450M.tshwj tsis yog tias muaj lwm yam hauv no.
Tubes yuav tsum tau ua los ntawmHluav taws xob tsis kam vuam (ERW).
Nrog nws cov nqi tsim khoom qis, qhov tseeb qhov tseeb, lub zog zoo thiab ua haujlwm ntev, thiab tsim kev yooj yim, ERW steel yeeb nkab tau dhau los ua cov khoom siv rau ntau yam kev lag luam piping systems, structural engineering, thiab ntau yam kev tsim kho vaj tse.
Tom qab vuam, tag nrho cov raj yuav tsum tau kho cua sov ntawm qhov kub ntawm 1650 ° F [900 °] los yog siab dua thiab ua raws li cua txias los yog nyob rau hauv lub txias chamber ntawm ib tug tswj cua sov rauv.
Cov raj txias txias yuav tsum tau kho kom sov tom qab qhov kawg ntawm qhov txias txias dhau ntawm qhov kub ntawm 1200 ° F [650 ° C] lossis siab dua.
| C(Carbon) | Mn(Manganese) | P(Phosphorus) | S(Sulfur) |
| max 0.18% | 0.27-0.63 Nws | max 0.035% | max 0.035% |
Nws tsis tso cai los muab cov qib ntawm cov hlau alloy uas tshwj xeeb hu rau qhov sib ntxiv ntawm cov khoom uas tsis yog cov npe teev tseg.
Cov kev cai siv tshuab tsis siv rau cov tubing nrog lub taub sab hauv tsawg dua 0.126 hauv [3.2 hli] lossis thickness tsawg dua 0.015 hauv [0.4 hli].
Tensile Khoom
Tsis muaj cov cai tshwj xeeb rau cov khoom tensile hauv ASTM A214.
Qhov no yog vim ASTM A214 feem ntau yog siv rau kev sib hloov cua sov thiab condensers.Kev tsim thiab kev ua haujlwm ntawm cov khoom siv no feem ntau tsis tso siab rau ntawm lub raj.Hauv qhov sib piv, kev saib xyuas ntau dua yog muab rau lub raj muaj peev xwm tiv taus siab, nws cov khoom hloov hluav taws xob, thiab nws cov corrosion kuj.
Flattening Test
Rau welded yeeb nkab, qhov yuav tsum tau xeem seem ntev yog tsis tsawg tshaj li 4 in (100 mm).
Qhov kev sim tau ua nyob rau hauv ob kauj ruam:
Thawj kauj ruam yog qhov ntsuas ductility, sab hauv lossis sab nrauv ntawm cov yeeb nkab steel, yuav tsum tsis txhob muaj cov kab nrib pleb lossis tawg kom txog thaum qhov kev ncua deb ntawm daim hlau yog tsawg dua tus nqi ntawm H xam raws li cov qauv hauv qab no.
H=(1+e)t/(e+t/D)
H= nrug nruab nrab ntawm daim hlau flattening, in. [mm],
t= teev phab ntsa thickness ntawm lub raj, hauv [mm],
D= teev sab nraud txoj kab uas hla ntawm lub raj, hauv. [mm],
e= 0.09 (deformation ib chav tsev ntev) (0.09 rau cov pa roj carbon tsawg (qhov siab tshaj cov pa roj carbon 0.18% lossis tsawg dua)).
Qhov thib ob yog qhov kev ntsuam xyuas kev ncaj ncees, uas yuav tsum tau txuas ntxiv mus kom txog thaum cov qauv tawg lossis cov yeeb nkab phab ntsa sib ntsib.Thoob plaws hauv qhov kev ntsuam xyuas flattening, yog tias cov khoom laminated lossis cov khoom tsis zoo pom, lossis yog tias qhov vuam tsis tiav, nws yuav tsum tsis lees paub.
Flange Test
Ib ntu ntawm cov yeeb nkab yuav tsum muaj peev xwm ua tau flanged mus rau ib txoj hauj lwm ntawm txoj cai kaum rau lub cev ntawm cov yeeb nkab yam tsis muaj kev tawg lossis tsis zoo uas tuaj yeem raug tsis lees paub raws li cov kev cai ntawm cov khoom specification.
Qhov dav ntawm flange rau carbon thiab alloy steels yuav tsum tsis pub tsawg tshaj li qhov feem pua.
| Sab nraud txoj kab uas hla | Dav ntawm Flange |
| Rau 2½in [63.5mm], incl | 15% ntawm OD |
| Tshaj 2½ txog 3¾ [63.5 txog 95.2], incl | 12.5% ntawm OD |
| Tshaj 3¾ txog 8 [95.2 txog 203.2], incl | 15% ntawm OD |
Rov qab Flattening Test
A 5 nyob rau hauv. [100 mm] nyob rau hauv ntev ntawm tiav welded tubing nyob rau hauv qhov ntau thiab tsawg mus rau thiab nrog rau ½ nyob rau hauv. [12.7 mm] nyob rau hauv sab nraud txoj kab uas hla yuav tsum tau muab faib longitudinally 90 ° ntawm txhua sab ntawm lub weld thiab cov qauv qhib thiab flattened nrog lub weld ntawm qhov taw tes ntawm qhov siab tshaj plaws khoov.
Yuav tsum tsis muaj pov thawj ntawm cov kab nrib pleb tsis muaj qhov nkag los yog sib tshooj uas tshwm sim los ntawm kev tshem tawm flash hauv qhov vuam.
Hardness Test
Lub hardness ntawm lub raj yuav tsum tsis txhob tshaj72 PAB.
Rau cov raj 0.200 hauv [5.1 hli] thiab tshaj hauv phab ntsa tuab, yuav tsum siv Brinell lossis Rockwell hardness test.
Kev ntsuas hluav taws xob hydrostatic lossis tsis muaj kev puas tsuaj yog ua rau ntawm txhua cov yeeb nkab steel.
Hydrostatic Test
Covsiab tshaj tus nqiyuav tsum tau khaws cia tsawg kawg yog 5s yam tsis muaj dej.
Qhov tsawg kawg nkaus hydrostatic xeem siab yog muaj feem xyuam rau sab nraud txoj kab uas hla thiab phab ntsa thickness ntawm cov yeeb nkab.Nws tuaj yeem suav tau los ntawm cov qauv.
Ib nti-Pound Units: P = 32000 t/DorSI Units: P = 220.6 t/D
P= hydrostatic test siab, psi lossis MPa,
t= teev phab ntsa thickness, in. or mm,
D= teev sab nraud txoj kab uas hla, in. los yog mm.
Kev sim siab tshaj plaws, ua raws li cov cai hauv qab no.
| Sab nraum txoj kab uas hla ntawm Tube | Hydrostatic Test Siab, psi [MPa] | |
| OD ＜ 1 in | OD 25.4 hli | 1000 [7] |
| 1 ≤ OD ＜ 1½ nyob rau hauv | 25.4≤ OD ＜38.1 hli | 1500 [10] |
| 1½≤ OD ＜ 2 nyob rau hauv | 38.≤ OD ＜50.8 hli | 2000 [14] |
| 2 ≤ OD ＜ 3 nyob rau hauv | 50.8≤ OD ＜76.2 hli | 2500 [17] |
| 3 ≤ OD ＜5 nyob rau hauv | 76.2≤ OD ＜127 hli | 3500 [24] |
| OD ≥5 nyob rau hauv | OD ≥127 hli | 4500 [31] |
Nondestructive Electric Test
Txhua lub raj yuav tsum raug tshuaj xyuas los ntawm cov txheej txheem tsis muaj kev puas tsuaj raws li Specification E213, Specification E309 (cov ntaub ntawv ferromagnetic), Specification E426 (cov ntaub ntawv tsis sib nqus), lossis Specification E570.
Cov ntaub ntawv hauv qab no yog muab los ntawm ASTM A450 thiab ua tau raws li qhov yuav tsum tau muaj rau welded steel yeeb nkab nkaus xwb.
Qhov hnyav sib txawv
0 - + 10%, tsis muaj qhov sib txawv hauv qab.
Qhov hnyav ntawm cov yeeb nkab steel tuaj yeem suav nrog cov qauv.
W = C(Dt)t
W= weight, Ib/ft [kg/m],
C= 10.69 rau Inch Units [0.0246615 for SI Units],
D= teev sab nraud txoj kab uas hla, hauv. [mm],
t= teev tsawg kawg nkaus phab ntsa thickness, hauv. [mm].
Phab ntsa Thickness Deviation
0 - +18%.
Qhov sib txawv ntawm phab ntsa tuab ntawm ib ntu ntawm cov yeeb nkab steel 0.220 hauv [5.6 hli] thiab saum toj no yuav tsum tsis pub tshaj ± 5% ntawm qhov tseeb nruab nrab phab ntsa tuab ntawm ntu ntawd.
Qhov nruab nrab phab ntsa thickness yog qhov nruab nrab ntawm cov phab ntsa tuab thiab thinnest phab ntsa thicknesses nyob rau hauv seem.
Sab nraud Diameter Deviation
| Sab nraud txoj kab uas hla | Permissible Variations | ||
| in | mm | in | mm |
| OD ≤1 | OD ≤ 25.4 | ± 0.004 | ± 0.1 |
| 1＜ OD ≤1½ | 25.4＜ OD ≤38.4 | ± 0.006 | ± 0.15 |
| 1½＜ OD＜2 | 38.1＜ OD＜ 50.8 | ± 0.008 | ± 0.2 |
| 2≤ OD ＜2½ | 50.8≤ OD ＜63.5 | ± 0.010 | ± 0.25 |
| 2 ½ ≤ OD ＜3 | 63.5 OD ＜ 76.2 | ± 0.012 | ± 0.30 |
| 3 ≤ OD ≤ 4 | 76.2≤ OD ≤101.6 | ± 0.015 | ± 0.38 |
| 4＜ OD ≤ 7½ | 101.6＜ OD ≤190.5 | -0.025 - 0.015 | -0.64 - 0.038 |
| 7½＜ OD ≤ 9 | 190.5＜ OD ≤ 228.6 | -0.045 - 0.015 | -1.14 - +0.038 |
Cov roj hmab tiav lawm yuav tsum tsis muaj nplai.Ib qho me me ntawm oxidation yuav tsum tsis suav tias yog nplai.
Txhua lub raj yuav tsum tau sau meej meej nrog covcov chaw tsim khoom lub npe lossis hom, tus lej tshwj xeeb, thiab ERW.
Cov chaw tsim khoom lub npe lossis lub cim yuav muab tso rau hauv txhua lub raj los ntawm dov lossis lub teeb stamping ua ntej normalizing.
Yog hais tias ib lub stamp muab tso rau ntawm lub raj los ntawm txhais tes, lub cim no yuav tsum tsis txhob tsawg tshaj li 8 in. [200 mm] ntawm ib kawg ntawm lub raj.
Tsis kam mus rau qhov kub thiab txias: Kev muaj peev xwm tiv taus qhov kub thiab txias yog qhov tseem ceeb heev hauv kev sib pauv cua sov.
Zoo thermal conductivity: Cov ntaub ntawv thiab cov txheej txheem tsim khoom ntawm lub raj steel no ua kom muaj thermal conductivity zoo heev rau cov ntawv thov uas yuav tsum tau hloov pauv tau zoo.
Weldability: Lwm qhov zoo dua yog tias lawv tuaj yeem txuas tau zoo los ntawm kev vuam, ua rau kev teeb tsa thiab kev saib xyuas yooj yim dua.
Feem ntau yog siv nyob rau hauv tshav kub exchangers, condensers, thiab zoo xws li cov khoom siv hluav taws xob hloov lwm lub tsev.
1. Thaum tshav kub kub exchangers: Hauv ntau cov txheej txheem kev lag luam, cov khoom siv hluav taws xob tau siv los hloov lub zog hluav taws xob los ntawm ib qho kua (kua lossis roj) mus rau lwm qhov yam tsis tso cai rau lawv nkag mus rau hauv kev sib cuag ncaj qha.ASTM A214 steel tubes tau siv dav hauv cov khoom siv no vim tias lawv tuaj yeem tiv taus qhov kub thiab txias uas tuaj yeem tshwm sim hauv cov txheej txheem.
2. Condenser: Condensers feem ntau yog siv rau kev tshem tawm cov cua sov hauv cov txheej txheem txias, xws li hauv cov tub yees thiab cua txias, los yog hloov cov chav dej rov qab rau hauv cov chaw siv hluav taws xob.Lawv siv nyob rau hauv cov tshuab no vim lawv cov thermal conductivity zoo thiab txhua yam muaj zog.
3. Cov cuab yeej siv cua sov: Hom steel tube no kuj siv rau hauv lwm yam khoom siv hluav taws xob sib pauv xws li cov khoom siv hluav taws xob thiab cov condensers, xws li evaporators thiab coolers.
ASTM A179 Cov khoom lag luam: yog seamless txias-drawn me me steel tshav kub exchanger thiab condenser tubing.Nws feem ntau yog siv rau hauv daim ntawv thov nrog cov ntawv zoo sib xws, xws li cov khoom siv hluav taws xob thiab cov condensers.Txawm hais tias A179 yog seamless, nws muab cov khoom sib xws sib xws.
ASTM A178 Cov khoom lag luam: Npog tiv thaiv-welded carbon thiab carbon-manganese steel boiler raj.Cov raj no yog siv rau hauv boilers thiab superheaters, thiab tseem tuaj yeem siv rau hauv kev sib pauv cua sov nrog cov kev xav tau zoo sib xws, tshwj xeeb tshaj yog qhov yuav tsum muaj cov tswv cuab welded.
ASTM A192 Cov Lus Qhia Tshwj Xeeb: npog seamless carbon steel boiler raj rau kev pabcuam siab.Thaum cov raj no feem ntau yog npaj rau kev siv nyob rau hauv high-pressure thiab high-temperature ib puag ncig, lawv cov ntaub ntawv thiab cov txheej txheem tsim ua rau lawv haum rau siv nyob rau hauv lwm yam khoom siv hluav taws xob hloov mus rau qhov kub thiab txias.
Peb yog ib tug zoo welded carbon steel yeeb nkab chaw tsim tshuaj paus thiab tsum los ntawm Tuam Tshoj, thiab kuj yog ib tug seamless steel yeeb nkab stockist, muab koj ib tug ntau yam ntawm cov yeeb nkab steel kev daws teeb meem!
Yog xav paub ntxiv los yog xav paub ntxiv txog peb cov khoom, tsis txhob yig tiv tauj peb.Koj cov yeeb nkab steel zoo tshaj plaws tsuas yog cov lus tawm!
