ASTM A252 Gawo 3ndi zinthu zomwe zimagwiritsidwa ntchito ngati chitoliro cha cylindrical mulu.
Milu yazitsulo zazitsulo za Grade 3 sizimangokhala ndi ndondomeko yeniyeni yopangira ndipo zimatha kupangidwa pogwiritsa ntchito njira zosiyanasiyana zopangira zitoliro, kuphatikizapoSMLS(zopanda malire),SAW(mizere ya arc welded), ndiEFW(electro-fusion welded).Kusinthasintha uku kumapangitsa kuti zisinthidwe malinga ndi zosowa zamainjiniya osiyanasiyana komanso mawonekedwe ogwiritsira ntchito.
Monga kalasi yapamwamba kwambiri pamtundu wa A52, ili ndi makina abwino kwambiri okhala ndi mphamvu zochepa zokolola za 310 MPa ndi mphamvu zocheperapo za 455 MPa ndipo zingagwiritsidwe ntchito ngati chigawo chokhazikika chonyamula katundu kapena ngati chipolopolo choponyera mkati. - ikani milu ya konkire.
TheASTM A252muyezo amagawa milu yazitsulo zachitsulo m'magiredi atatu kuti zigwirizane ndi malo osiyanasiyana ogwiritsira ntchito komanso zofunikira pakutsitsa.Magiredi atatu ndi awa:
Grade 1, Grade 2 ndi Grade 3.
kampani anayambitsa ya wathunthu zida zapamwamba JCOE LSAW zitsulo kupanga chitoliro ndi zida kuyezetsa, okhazikika kupanga wandiweyani-mipanda, lalikulu m'mimba mwake LSAW zitsulo chitoliro ndi DSAW (kuwotcherera kwa arc mbali ziwiri).
Mafotokozedwe azinthu ndi awa:
Akunja DiameterDN 350 - 1500;
Makulidwe a Khoma8-80 mm;
Milu ya mipope iyenera kukhala yosalala.
Mapeto ake ayenera kudulidwa ndi moto kapena kudulidwa ndi makina.
Kutengera pamapeto a beveled, ngodya ya mapeto a beveled iyenera kukhala30-35 °.
Botop Steelimapereka mapaipi azitsulo apamwamba a ASTM A52.Chonde khalani omasuka kulumikizana nafe pazomwe mukufuna.
Chitsulocho chidzapangidwa ndi chimodzi kapena zingapo mwa njira zotsatirazi: malo otseguka, oyambira-oxygen, kapena ng'anjo yamagetsi.
A252 idzapangidwa ndi aopanda msoko, kukana magetsi welded, flash welded, kapenafusion weldedndondomeko.
Mizere ya milu yowotcherera ya mapaipi iyenera kukhalalongitudinal, helical-butt, kapenahelical-lap.
Kuti muwonetsetse kuti milu yazitsulo zitoliro zikuyenda bwino, ndikofunikira kusankha njira yoyenera yopangira.
Njira ya LSAW (SAWL) ndi yabwino kwa chitoliro chachitsulo chokhala ndi m'mimba mwake, wandiweyani, makamaka muzomangamanga ndi zomangamanga zomwe zimafuna kunyamula katundu wambiri komanso kumanga maziko ozama.Chifukwa cha mphamvu zake zapamwamba, mphamvu zonyamula katundu, komanso kusinthasintha kwakuya, zimatha kugwirizanitsa ndi zovuta zosiyanasiyana za geologic pamene zimapereka ubwino wokhazikitsa mwamsanga ndi kukhazikika kwa nthawi yaitali.
JCOEndi wamba kupanga ndondomeko kupanga LSAW zitsulo chitoliro, amene ali ubwino Mwachangu mkulu, apamwamba, lalikulu m'mimba mwake kupanga mphamvu, dimensional kulondola, kusinthasintha, ndi chuma, zomwe zapanga izo yokonda chitoliro kupanga ndondomeko ambiri lalikulu- ma projekiti a engineering.
Chitsulocho chiyenera kukhala0.050% phosphorous.
Kuchepetsa phosphorous muzitsulo ndikuwonetsetsa kuti chitsulocho chimakhala ndi makina abwino, makamaka akamagwiritsidwa ntchito pomanga monga kumanga mulu.
Kuchepetsa kumeneku kumathandiza kuti chitsulo chisawonongeke kwambiri pa kutentha kochepa, motero kuonetsetsa kuti chitetezo chake ndi chodalirika pakugwiritsa ntchito.
Pazinthu zina, palibe zofunikira.
Izi zili choncho chifukwa cholinga chachikulu cha machubu a milu ya chitoliro ndikuwonetsetsa kuti machubuwa ali ndi mphamvu zokwanira komanso zolimba, zomwe ndizofunikira kwambiri kuti zigwiritsidwe ntchito pothandizira.
Kwa machubu a mulu wa tubular, chidwi chochulukirapo chimaperekedwa kuzinthu zamakina a machubu, monga mphamvu zokolola, kulimba kwamphamvu, komanso kulimba, popeza zinthu izi zimagwirizana mwachindunji ndi mphamvu yonyamula katundu komanso kukhazikika kwamilu ya milu ya tubular pakugwiritsa ntchito bwino. .
ATebulo 2 limapereka ziwerengero zochepera zomwe zawerengedwa:
Kumene makulidwe a khoma lotchulidwa ndi apakati ndi omwe asonyezedwa pamwambapa, mtengo wocheperako wotalikirapo udzatsimikiziridwa motere:
Kalasi 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: elongation mu 2 in. [50.8 mm], %;
t: makulidwe a khoma mwadzina, mkati [mm].
Muyezo wa ASTM A252 Grade 3 umatsimikizira chitetezo ndi kudalirika kwa milu ya tubular yomwe ikugwiritsidwa ntchito pokhazikitsa zofunikira zochepa pamakinawa.
Kwa miyeso ya chitoliro chomwe sichinatchulidwe mu matebulo a kulemera kwa chitoliro, kulemera kwa unit kutalika kumatha kuwerengedwa pogwiritsa ntchito chilinganizo.
w = C×(Dt)×t
w: kulemera kwa unit kutalika, Ilb/ft [kg/m];
D: kutchulidwa kunja kwake, mkati. [mm];
t: makulidwe a khoma mwadzina, mkati [mm];
C: 0.0246615 powerengera mu mayunitsi a SI ndi 10.69 powerengera mayunitsi a USC.
Mawerengedwe apamwambawa amachokera ku lingaliro lakuti kachulukidwe ka chitoliro chachitsulo ndi 7.85 kg/dm³.
ASTM A252 Giredi 3 ili ndi mphamvu komanso kulimba kwa dothi lamitundu yosiyanasiyana komanso zonyamula katundu.Chitoliro ichi chachitsulo chimagwiritsidwa ntchito kwambiri pazotsatira zotsatirazi:
1. Kumanga maziko: ASTM A252 Gulu la 3 chitoliro chachitsulo chimagwiritsidwa ntchito ngati maziko a mulu mu ntchito ya maziko a nyumba zapamwamba, milatho, ndi nyumba zina zazikulu kuti apereke chithandizo chofunikira ndi kukhazikika.
2. Madoko ndi madoko: Mapaipi achitsulowa amagwiritsidwa ntchito pomanganso pomanga madoko ndi madoko kuti awonetsetse kuti dongosololi limatha kupirira zovuta za zombo komanso kukokoloka kwa chilengedwe cha m'madzi.Pofuna kuonjezera kupirira ndi kukana dzimbiri za mapaipi achitsulo, zokutira nthawi zambiri zimagwiritsidwa ntchito kuti zipereke chitetezo chowonjezera.
3. MadziChitoliro chachitsulo cha ASTM A252 Grade 3 chimagwiritsidwa ntchito kulimbikitsa magombe a mitsinje ndikupereka chitetezo cha kusefukira kwa madzi pomanga madamu, maloko, ndi malo ena amadzi.
4. Ntchito zamagetsi: Mu mphamvu yamphepo, zida zamafuta, ndi ntchito zina zopangira magetsi, mapaipi achitsulowa amagwiritsidwa ntchito ngati zida zothandizira kuonetsetsa kuti zida zikuyenda bwino.
5. Zoyendera: Chitoliro chachitsulo cha ASTM A252 Grade 3 chimagwiritsidwa ntchito pomanga njanji, misewu yayikulu, ndi mabwalo a ndege kuti apereke mphamvu zokwanira zonyamula katundu komanso kulimba.
Kuyambira pomwe idakhazikitsidwa mu 2014,Botop Steelwakhala katundu kutsogolera mpweya zitsulo chitoliro ku Northern China, kudziwika ndi utumiki kwambiri, mankhwala apamwamba, ndi mayankho mabuku.
Botop Steelamapereka mitundu yosiyanasiyana ya mapaipi a carbon steel ndi mankhwala okhudzana nawo, kuphatikizapo osasunthika, ERW, LSAW, ndi chitoliro chachitsulo cha SSAW, komanso mzere wathunthu wa zopangira zitoliro ndi flanges.Zopangira zake zapadera zimaphatikizanso ma alloys apamwamba kwambiri ndi zitsulo zosapanga dzimbiri za austenitic, zopangidwa kuti zikwaniritse zofunikira zama projekiti osiyanasiyana a mapaipi.
ASTM A252 GR.2 GR.3 Milu Yachitsulo Yopanda Msoko
ASTM A252 GR.3 SSAW Milu Yachitsulo Chitoliro
AS 1579 SSAW Madzi Zitsulo Pipe Ndi Mulu Wachitsulo
EN10219 S355J0H LSAW(JCOE) Mulu wa Chitoliro chachitsulo
EN 10219 S275J0H/S275J2H ERW Chitoliro Chachitsulo Chomangika
BS EN10210 S355J0H Carbon Seamless Steel Pipe
EN10210 S355J2H CHIPEMBEDZO CHA ERW zitsulo PIPE
API 5L PSL1&PSL2 GR.B Longitudinal Submerged-Arc Welded Pipe
ASTM A501 Gulu B LSAW Carbon Steel Structural Tubing
ASTM A672 B60/B70/C60/C65/C70 LSAW LSAW Chitoliro Chachitsulo cha Carbon
Chitoliro chachitsulo cha ASTM A671/A671M LSAW
ASTM A500 Kalasi C Yopanda Zitsulo Zomangamanga
