ASTM A252Umuyoboro w'icyuma ni ibikoresho bisanzwe by'imiyoboro y'uruziga bitwikira ubwoko bwasutswe n'ubudasobwa ku miyoboro y'icyuma aho silinda y'icyuma ikoreshwa nk'igikoresho gihoraho cyo gutwara imizigo cyangwa nk'igikonoshwa kugira ngo habeho ikirundo cya sima ishongeshejwe.
Icyiciro cya 3ni yo manota yo hejuru mu mikorere mu byiciro bitatu bya A252, niburaimbaraga z'umusaruro wa 310MPa [45,000 psi]n'imiburiburiimbaraga zo gukurura za 455MPa [66,000 psi]Ugereranyije n'izindi ntera, icyiciro cya 3 gikwiriye inyubako ziremereye cyangwa ahantu hagoye cyane, kandi gikunze gukoreshwa mu kubaka ishingiro ry'ibiraro binini, inyubako ndende, cyangwa urubuga rwo ku nkengero z'inyanja.
A252 igabanyijemo ibyiciro bitatu kugira ngo ihangane n'ahantu hatandukanye ho gukoreshwa.
Icyiciro cya 1,Icyiciro cya 2, naIcyiciro cya 3.
Kwiyongera buhoro buhoro mu miterere y'imashini.
Icyiciro cya 1Ikoreshwa cyane cyane mu bikorwa aho ubwiza bw'ubutaka ari bwiza kandi ibisabwa mu gutwara imizigo bitari hejuru cyane. Ingero zirimo ishingiro ryoroheje ry'inyubako zo guturamo cyangwa iz'ubucuruzi, cyangwa ibiraro bito bidasaba imitwaro ihambaye.
Icyiciro cya 2ikwiriye gukoreshwa mu butaka bubi cyangwa bufite ubushobozi bwo gutwara imizigo myinshi. Urugero, ibiraro biremereye ku rugero ruciriritse, inyubako nini z'ubucuruzi, cyangwa ibikorwa remezo by'ibikorwa remezo bya leta. Ishobora kandi gukoreshwa mu turere dufite amazi menshi, nko mu migezi n'ibiyaga, aho hakenewe imbaraga zo kurwanya kwangirika kw'amazi.
Icyiciro cya 3ikoreshwa mu bintu biremereye mu bihe bikomeye, nko mu biraro binini, mu rufatiro rw'ibikoresho biremereye, cyangwa mu mirimo y'ifatizo ndende ku nyubako ndende. Byongeye kandi, ku bintu byihariye bya geologi, nk'ubutaka bworoshye cyane cyangwa budahindagurika, Icyiciro cya 3 gitanga ubushobozi bwo gutwara imizigo n'ubudahindagurika.
Yashinzwe mu 2014,Botop Steelni ikigo gikomeye mu kugurisha imiyoboro y'ibyuma bya karuboni mu majyaruguru y'Ubushinwa, kizwiho gukora imiyoboro y'ibyuma ikoze mu buryo bworoshye kandi idakora cyane.
Ibicuruzwa byacu byose byujuje amahame ya ASTM A252 akomeye, bigamije gutuma habaho imikorere myiza mu bihe bikomeye.
Dutanga kandi ubwoko bwose bw'ibikoresho n'ibice bifasha mu guhaza ibyifuzo by'imishinga itandukanye y'imiyoboro.
Iyo uhisemo Botop Steel, uba uhisemo kuba indashyikirwa no kuba inyangamugayo.
Imiyoboro y'imiyoboro ya ASTM A252 ishobora gushyirwa mu byiciro bibiri by'ingenzi byo gukora:idasobekeranye kandi ivanze.
Mu gikorwa cyo gusudira, gishobora kugabanywamo kabiri muERW, EFW, naSAW.
SAW ishobora gushyirwa mu byiciroLSAW(SAWL) naSSAW(HSAW) bitewe n'icyerekezo cy'aho isudira iherereye.
Kubera ko SAW ikunze gusudira hakoreshejwe uburyo bwo gusudira bugizwe n'impande ebyiri, akenshi yitwaDSAW.
Ubu buryo butandukanye bwo gukora butuma umuyoboro wa ASTM A252 w’ibirundo by’imiringoti uhura n’ibikenewe mu buhanga bitandukanye.
Imbonerahamwe y'umusaruro w'umuyoboro w'icyuma gikoze mu buryo bwa spiral (SSAW) ikurikira ni iyi:
Umuyoboro w'icyuma wa SSAWni nziza cyane mu gukora imiyoboro y'icyuma ifite umurambararo munini kandi ishobora gukorwa mu bugari bwa mm 3,500. Ntabwo ishobora gukorwa mu burebure cyane gusa, ni nziza ku nyubako nini, ariko imiyoboro y'icyuma ya SSAW nayo irahendutse ugereranije n'imiyoboro y'icyuma ya LSAW na SMLS.
Botop Steel ishobora gutanga ingano zikurikira z'imiyoboro y'icyuma:
Igipimo cya fosifore ntikigomba kurenga 0.050%.
Ibisabwa ku miterere y'imiti ya ASTM A252 biroroshye ugereranije n'ibindi bipimo ngenderwaho by'imiyoboro ku bindi bikorwa kuko iyo umuyoboro ukoreshejwe nk'ikirundo cy'imiyoboro, ahanini uba ufite imiterere y'imiterere. Birahagije ko umuyoboro w'icyuma ushobora kwihanganira imitwaro ikenewe n'ibidukikije. Iyi miti yoroshye ifasha mu kunoza ikiguzi n'umusaruro mu gihe ihura n'ibikenewe by'ibanze by'umutekano n'uburambe bw'imiterere.
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].
Ku ngano z'ibirundo by'imiyoboro zitari ku rutonde rw'ibiro by'imiyoboro, uburemere kuri buri gice cy'uburebure bugomba kubarwa ku buryo bukurikira:
W = 10.69(D - t)t [W = 0.0246615(D - t)t ]
W = uburemere kuri buri gice cy'uburebure, lb/ft [kg/m].
D = umurambararo wo hanze wagaragajwe, muri. [mm],
t = ubugari bw'urukuta bw'izina, muri. [mm].
Isosiyete yacu itanga ubwoko bwinshi bw'amabara arimo irangi, varnish, galvanized, epoxy ikunzwe na zinc, 3LPE, epoxy ya tar tar, nibindi kugira ngo ihuze n'ibyo imishinga itandukanye ikeneye kandi ikomeze kuramba.
Mu gihe uguze umuyoboro wa A252 Pipe Pibing, amakuru akurikira agomba gutangwa kugira ngo yorohereze umucuruzi ubushobozi bwo guhaza neza ibyo ukeneye byihariye no kugabanya impinduka zishobora gukurikiraho n'ibisubizo bishobora kubaho.
1 Ingano (ibirenge cyangwa umubare w'uburebure),
2 Izina ry'ibikoresho (imiyoboro y'icyuma),
Uburyo 3 bwo gukora (budafite umushono cyangwa busutswe),
Icyiciro cya 4 (1, 2, cyangwa 3),
Ingano 5 (umurambararo wo hanze n'ubugari bw'urukuta),
Uburebure 6 (busanzwe, bubiri busanzwe, cyangwa bungana),
7 Irangira,
8 Imiterere y'ibipimo bya ASTM n'umwaka byatanzweho.
