Icyiciro cya 3 cya ASTM A252ni cyo gikoresho gikunze gukoreshwa nk'umuyoboro w'ibirundo by'umuzenguruko.
Imiyoboro y'icyuma yo mu rwego rwa 3 ntabwo igarukira ku buryo bwihariye bwo kuyikora kandi ishobora gukorwa hakoreshejwe uburyo butandukanye bwo gukora imiyoboro, harimoSMLS(bidahindagurika),SAW(arc ishongeshejwe), naEFW(electro-fusion welded). Ubu buryo bworoshye butuma ihuzwa n'ibikenewe mu buhanga butandukanye ndetse n'uburyo bwo kuyikoresha.
Kubera ko ari yo ifite urwego rwo hejuru mu gipimo cya A52, ifite imiterere myiza ya mekanike ifite imbaraga nkeya za 310 MPa n'imbaraga nkeya zo gukurura za 455 MPa kandi ishobora gukoreshwa nk'igice cy'imiterere gihoraho gitwara imizigo cyangwa nk'igikonoshwa cyo gucukura imigozi ya sima ikoreshejwe.
ItsindaASTM A252Standard ishyira imiyoboro y'ibyuma mu byiciro bitatu kugira ngo ihuze n'ahantu hatandukanye ho gukoreshwa n'ibisabwa mu gupakira. Ibyiciro bitatu ni ibi bikurikira:
Icyiciro cya 1, Icyiciro cya 2, n'Icyiciro cya 3.
Iyi kompanyi yashyizeho ibikoresho byuzuye byo gukora imiyoboro y'icyuma ya JCOE LSAW igezweho n'ibikoresho byo gupima, byibanda ku gukora imiyoboro y'icyuma ya LSAW ifite inkuta nini kandi ifite umurambararo munini hamwe na DSAW (gusudira arc iri munsi y'impande ebyiri).
Ibipimo by'ibicuruzwa ni ibi bikurikira:
Ingano y'inyuma: DN 350 – 1500;
Ubunini bw'urukuta: mm 8 – 80;
Imiyoboro y'imiyoboro igomba kuba isanzwe.
Impera z'aho zigomba gucibwa n'umuriro cyangwa gucibwa n'imashini hanyuma zigakurwaho umuriro.
Mu gihe cyaimpera zifite imitako, inguni y'impera ifite imigozi igomba kuba30 - 35°.
Botop Steelitanga ubwoko bwinshi bw'imiyoboro y'icyuma ya ASTM A52 nziza cyane. Nyamuneka twandikire ku byo ukeneye.
Icyuma kigomba gukorwa hakoreshejwe bumwe cyangwa bwinshi muri ubu buryo bukurikira: umuriro ufunguye, umwuka w'ibanze, cyangwa umuriro w'amashanyarazi.
A252 igomba gukorwa naumushororo, ikoreshwa ry'amashanyarazi risukwa, ishyushye ikoresheje icyuma gishyushyacyangwaifuru ivanzeinzira.
Imirongo y'imiyoboro ishongeshejwe igomba kubaigihe kirekire, ikibuno cya helicalcyangwaumurambararo wa helikopta.
Kugira ngo imiyoboro y'ibyuma igire ubwiza n'imikorere myiza, ni ngombwa guhitamo inzira ikwiye yo kuyikora.
Uburyo bwa LSAW (SAWL) ni bwiza cyane ku muyoboro w'icyuma ufite uburebure bunini kandi ufite inkuta ninicyane cyane mu mishinga y’ubwubatsi n’ibikorwa remezo bisaba ubushobozi bwo gutwara imizigo myinshi no kubaka urufatiro rwimbitse. Bitewe n’imbaraga zayo zihebuje, ubushobozi bwo gutwara imizigo, no kwihuza n’ubujyakuzimu, irashobora kwihuza n’imiterere itandukanye y’ubutaka mu gihe itanga inyungu zo gushyiraho vuba no kuramba igihe kirekire.
JCOEni uburyo busanzwe bwo gukora imiyoboro y'icyuma ya LSAW, bufite ibyiza byo gukora neza cyane, ubwiza bwo hejuru, ubushobozi bwo gukora uburebure bunini, imiterere ihamye, kwihuza n'ibindi, no gukoresha amafaranga make, ari byo byatumye iba inzira ikundwa cyane mu mishinga myinshi minini y'ubuhanga.
Icyuma kigomba kuba kirimofosifero itarenze 0.050%.
Kugabanya ingano ya fosifore mu byuma ni ukugira ngo icyuma kigire imiterere myiza ya mekanike, cyane cyane iyo gikoreshwa mu bikorwa by'ubwubatsi nko kubaka inyubako.
Iyi mbogamizi ifasha mu gukumira ko icyuma kidacika intege cyane mu bushyuhe buke, bityo bigatuma gikomeza gukoreshwa neza kandi kikaba cyiza.
Ku bindi bintu biri muri urwo rutonde, nta bisabwa.
Ibi biterwa nuko intego nyamukuru y'imiyoboro y'ibirundo by'imiyoboro ari ukureba ko imiyoboro ifite imbaraga n'ubukomere bihagije, ibyo bikaba ari ingenzi mu gukoreshwa mu nyubako zishyigikiwe.
Ku miyoboro y’ibirundo by’imiyoboro, hitabwaho cyane imiterere y’imiyoboro, nko gukomera kw’umusaruro, imbaraga zo gukurura, no gukomera, kuko iyi miterere ifitanye isano itaziguye n’ubushobozi bwo gutwara imizigo n’uburyo imiyoboro y’ibirundo by’imiyoboro ihamye mu bikorwa bifatika.
AImbonerahamwe ya 2 itanga agaciro ntarengwa kabazwe:
Iyo ubugari bw'urukuta rw'inyuma bugenwe buri hagati y'ubwagaragajwe haruguru, agaciro gato k'uburebure kagenwa ku buryo bukurikira:
Icyiciro cya 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: uburebure muri santimetero 50.8, %;
t: ubugari bw'urukuta bw'izina, muri. [mm].
Igipimo cya ASTM A252 cy’icyiciro cya 3 gishimangira umutekano n’ubwizerwe bw’imirongo y’ibice by’imigozi ikoreshwa binyuze mu gushyiraho ibisabwa ntarengwa kuri ubu buryo bw’imashini.
Ku bipimo by'imiyoboro bitanditswe mu mbonerahamwe y'uburemere bw'imiyoboro, uburemere kuri buri gice cy'uburebure bushobora kubarwa hakoreshejwe formula.
w = C×(Dt)×t
w: uburemere kuri buri gice cy'uburebure, Ilb/ft [kg/m];
D: umurambararo wo hanze wagaragajwe, muri. [mm];
t: ubugari bw'urukuta bw'izina, muri. [mm];
C: 0.0246615 ku mibare mu bice bya SI na 10.69 ku mibare mu bice bya USC.
Ibipimo byavuzwe haruguru bishingiye ku gitekerezo cy'uko ubucucike bw'umuyoboro w'icyuma ari 7.85 kg / dm³.
ASTM A252 Grade 3 ifite imbaraga nyinshi kandi ikomeye ku butaka butandukanye n'ibikenewe mu gutwara imizigo. Uyu muyoboro w'icyuma ukoreshwa cyane mu bikorwa bikurikira:
1. Kubaka ishingiro: Umuyoboro w'icyuma wa ASTM A252 wo mu cyiciro cya 3 ukoreshwa nk'ishingiro ry'ibirundo mu mirimo y'ifatizo ku nyubako ndende, ibiraro, n'izindi nyubako nini kugira ngo utange inkunga n'ubudahangarwa bikenewe.
2. Ibyambu n'ibyambu: Iyi miyoboro y'icyuma ikoreshwa mu kubaka ibyambu n'ibyambu kugira ngo inyubako ishobore kwihanganira ingaruka z'amato n'iyangirika ry'ibidukikije byo mu mazi. Kugira ngo imiyoboro y'icyuma yongere kuramba no kurwanya ingese, akenshi hakoreshwa irangi kugira ngo habeho uburinzi bwiyongereye.
3. Amazu yo mu mazi: Umuyoboro w'icyuma wa ASTM A252 wo mu cyiciro cya 3 ukoreshwa mu gukomeza inkombe z'imigezi no kurinda imyuzure mu kubaka ingomero, imiyoboro y'amazi n'ibindi bikorwa by'amazi.
4. Imishinga y'ingufu: Mu mishinga y'ingufu zikoreshwa n'umuyaga, mu byuma bicukura peteroli, no mu yindi mishinga y'ibikorwa remezo by'ingufu, iyi miyoboro y'icyuma ikoreshwa nk'inyubako zishyigikira imikorere ihamye y'ibikoresho.
5. Ibikoresho byo gutwara abantu n'ibintu: Umuyoboro w'icyuma wa ASTM A252 wo mu cyiciro cya 3 ukoreshwa mu kubaka inzira za gari ya moshi, imihanda minini, n'inzira z'ikibuga cy'indege kugira ngo utange ubushobozi buhagije bwo gutwara imizigo no kuramba.
Kuva yashingwa mu 2014,Botop Steelyabaye ikigo gikomeye mu kugurisha imiyoboro y'icyuma cya karuboni mu majyaruguru y'Ubushinwa, kizwiho gutanga serivisi nziza, ibicuruzwa byiza, n'ibisubizo byuzuye.
Botop SteelItanga imiyoboro itandukanye y'icyuma cya karuboni n'ibindi bifitanye isano, harimo imiyoboro y'icyuma idakora neza, ERW, LSAW, na SSAW, ndetse n'urutonde rwuzuye rw'imiyoboro n'ibice bifunganye. Ibicuruzwa byayo byihariye birimo kandi alloys nziza n'ibyuma bitarangirika bya austenitic, byakozwe kugira ngo bihuze n'ibikenewe mu mishinga itandukanye y'imiyoboro.
Umuyoboro w'ibyuma bitagira umushongi wa ASTM A252 GR.2 GR.3
Umuyoboro w'ibyuma bya ASTM A252 GR.3 SSAW
Umuyoboro w'icyuma n'umuyoboro w'icyuma wa AS 1579 SSAW
EN10219 S355J0H LSAW(JCOE) Umuyoboro w'icyuma
EN 10219 S275J0H/S275J2H Umuyoboro w'icyuma wa ERW wo kubaka inyubako
Umuyoboro w'icyuma kidakora neza wa BS EN10210 S355J0H wa karuboni
UMUYOBORO W'ICYUMWERU CYA ERW CYUMA CYA EN10210 S355J2H
API 5L PSL1 na PSL2 GR.B Umuyoboro w'ubururu ukozwe mu mazi ukoresheje umuyoboro w'ubururu
Umuyoboro w'ibyuma bya karuboni bya ASTM A501 Grade B LSAW
Umuyoboro wa ASTM A672 B60/B70/C60/C65/C70 LSAW Carbon Steel Pipe
Umuyoboro w'icyuma wa ASTM A671/A671M LSAW
Umuyoboro w'icyuma utagira umushongi wa ASTM A500 Grade C
