Mu rwego rwo gukora imiyoboro, hagomba gukurikizwa amahame n'ibipimo bitandukanye kugira ngo habeho ireme n'umutekano w'umusaruro wa nyuma.ASTM A139ni kimwe mu bipimo bigira uruhare runini mu gukora imiyoboro y'ibyuma ikoreshwa mu buryo butandukanye.
ASTM A139 ni yo ngingo isanzwe ikoreshwa mu miyoboro y'icyuma ivanze na electrofusion (arc) (NPS 4 no hejuru yayo). Ikubiyemo ibisabwa mu miyoboro y'icyuma ivanze na electrofusion (arc) ivanze na spiral seam, urukuta rworoshye, umuyoboro w'icyuma ukoreshwa mu kwangiza cyangwa mu bushyuhe bwinshi. Iyi ngingo igaragaza ibisabwa ku bikoresho, inzira zo gukora, ingano n'imiterere ya mekanike y'imiyoboro y'icyuma.
Ibisabwa mu bikoresho bya ASTM A139 bigaragaza ubwoko n'ibyiciro by'icyuma gishobora gukoreshwa mu gukora imiyoboro. Ibi birimo imiterere y'ibinyabutabire by'icyuma, bigomba kuba birimo ijanisha ryihariye ry'ibintu nka karuboni, manganese, fosifore, sulfur na silicon. Ibi bisabwa ni ingenzi kugira ngo icyuma gikoreshwa muriimiyoboroyujuje ibisabwa mu mbaraga no kurwanya ingese.
Uburyo bwo gukora umuyoboro wa ASTM A139 burimo gusudira hakoreshejwe amashanyarazi (electrofusion arc), ikoresha amashanyarazi kugira ngo ikore ubushyuhe bukenewe kugira ngo ihuze ibice by'icyuma mu buryo bwa cylindrical. Ubu buryo bugenzurwa neza kugira ngo harebwe ko ihuzwa ari nziza kandi nta nenge zirimo. Iri tegeko kandi rigena uburyo bwo kugenzura ihuzwa, nko gupima ultrasonic no gupima cross-guided bend, kugira ngo harebwe ko byujuje ibisabwa mu buziranenge.
Ku bijyanye n'ingano, ASTM A139 igaragaza ibisabwa ku bunini bw'umuyoboro, ubugari bw'urukuta, n'uburebure. Ibi birimo ubushobozi bwihariye bwo kwihanganira ingano kugira ngo umuyoboro wujuje ibisabwa kugira ngo ukoreshwe. Ibi bisabwa ku bunini ni ingenzi kugira ngo imiyoboro ishyirwemo kandi ihuzwe neza mu buryo butandukanye.
Imiterere ya mekanike nko gukomera kw'umuvuduko, imbaraga z'umusaruro, no kurekura nabyo byagaragajwe muri ASTM A139. Iyi miterere ni ingenzi mu kugena imbaraga n'imikorere y'umuyoboro mu bihe bitandukanye by'imikorere. Ihame rishyiraho ibisabwa ntarengwa kuri iyi miterere ya mekanike kugira ngo umuyoboro ushobore kwihanganira igitutu, ubushyuhe n'ibidukikije byitezwe.
Muri rusange, ASTM A139 igira uruhare runini mu gukoraimiyoboro y'icyumaku bikorwa bitandukanye. Mu kugaragaza ibikoresho, inzira zo gukora, ingano n'imiterere y'imiyoboro, iri hame rigenzura ko ibicuruzwa bya nyuma byujuje ibisabwa mu rwego rw'ubuziranenge n'umutekano. Biha abakora, abahanga mu by'imashini n'abakoresha icyizere cy'uko umuyoboro uzakora nk'uko byitezwe mu ikoreshwa ryawo.
Muri make, gusobanukirwa akamaro ka ASTM A139 mu gukora imiyoboro ni ingenzi cyane mu kugenzura ubuziranenge n'umutekano w'ibicuruzwa by'imiyoboro y'icyuma. Iri hame rishyiraho ibisabwa ku bikoresho, inzira zo gukora, ingano n'imiterere ya mekanike kugira ngo imiyoboro yuzuze amahame y'ubuziranenge n'imikorere bikenewe. Mu kubahiriza ASTM A139, abakora imiyoboro y'icyuma ishobora gukora imiyoboro y'icyuma myiza cyane ihuye n'ibyo inganda zitandukanye n'ikoreshwa ryayo.
Igihe cyo kohereza: Ukuboza-28-2023