How to do SML Pipe Tensile Test according to EN877?

Ku bicuruzwa bikozwe mu cyuma cya graphite cast steel, imbaraga zo gukurura zigomba gupimwa hakurikijweEN 598:2007+A1:2009, 6.3. Ku bicuruzwa bikozwe mu cyuma cy’umukara cyangwa ubundi bwoko bw’icyuma gikozwe mu cyuma, hagomba kugenwa imbaraga zo gukurura hakurikijwe ibikubiye muri 2 cyangwa 3.

Sobanura imbaraga zo gukurura imiyoboro y'icyuma cy'imvi n'uburyo gishyirwamo

1. Ingero

Kugira ngo haboneke ibisubizo bigaragaza uko bishoboka kose umusaruro warangiye, ibizamini byo gukurura bigomba gukorwa ku bipimo bikurikira:byaba bivanywe muriImiyoboro ya SMLcyangwa ibikoresho by'imiyoboro y'icyuma gishongeshejwe. Icyitegererezo kizacibwa kibangikanye n'umurongo w'umuyoboro cyangwa ibikoresho; cyangwa gusa ku bikoresho, bivuye mu bice by'igerageza bitandukanye, byashongeshejwe icyarimwe n'ibikoresho.

Igice cy'igerageza cyaciwe mu cyitegererezo kigomba kuba gihuye n'Ishusho, kandi niba giturutse mu bice by'igerageza byakozwe ukwabyo, gishobora kuba kirambuye aho kuba kigoroye.

2. Ibikoresho n'Uburyo bwo Gupima

Imashini ipima igomba kugira ibikoresho bikwiye kugira ngo yemererwe gukoresha imbaraga zo gupima nta gucika intege.
Imashini ipima igomba kuba ishobora gukora imbaraga zihagije zo kumena ibice by'igerageza mu gihe yerekana umutwaro wakoreshejwe.
Ubunyangamugayo bw'imashini ipima bugomba kuba bukurikijeEN IS0 6892-1:2019, Ingingo ya 9.
Umuvuduko wo gushyira imizigo ugomba kuba uhoraho uko bishoboka kose hakurikijweEN IS0 6892-1:2019, Ingingo ya 10.
Imbaraga zo gukurura zigomba kubarwa hagabanywa imbaraga zagaragajwe mu gihe cyo gucika n'ubuso bw'igice cy'ibanze cy'igice cy'igerageza. Igice cy'igerageza (ubugari n'ubugari) kigomba gupimwa neza nka mm 0.1 mbere y'ikizamini.

3. Isuzuma ry'imbaraga zo gukurura

Ikizamini cyemezwa ko gifite agaciro iyo ibisabwa bikurikira byujujwe:

ku miyoboro: impuzandengo y'agaciro ka gatatu gafatwa ku musaruro w'umunsi umwe igomba kuba nibura 200 MPa kandi agaciro kamwe ntarengwa gashobora kuba hagati ya 180 MPa na 200 MPa;
ku bikoresho: agaciro kose kagomba kuba nibura 150 MPa