API 5L muri rusange yerekeza ku ishyirwa mu bikorwa ry'imiyoboro y'umurongo, ari yo miyoboro ikoreshwa mu gutwara peteroli, amavuta, amazi, n'ibindi byakuwe mu butaka bikajya mu nganda zikomoka kuri peteroli na gaze gasanzwe. Imiyoboro y'umurongo irimo imiyoboro y'icyuma idafite icyerekezo hamwe n'imiyoboro y'icyuma isudira. Kugeza ubu, ubwoko bw'icyuma gikoreshwa mu gusudira mu miyoboro ya peteroli mu Bushinwa harimo umuyoboro wogosha arc weld (SSAW), umuyoboro muremure wa arc welded (LSAW), hamwe n'umuyoboro wo kurwanya amashanyarazi (ERW). Imiyoboro y'icyuma isanzwe itoranywa mugihe diameter ya pipe iri munsi ya 152mm.

Hano hari ibyiciro byinshi byibikoresho bya API 5L imiyoboro yicyuma: GR.B, X42, X46, X52, X56, X60, X70, X80, nibindi. Ibyiciro bitandukanye byibyuma byicyuma bifite ibyangombwa bisabwa kubikoresho fatizo n’umusaruro, kandi karubone ihwanye n’ibyiciro bitandukanye by’icyuma iragenzurwa cyane.

Nkuko buriwese azi ibya API 5L, hariho amahame abiri, PSL1 na PSL2. Nubwo hariho ijambo rimwe gusa itandukaniro, ibikubiye muri aya mahame yombi biratandukanye cyane. Ibi birasa na GB / T9711.1.2.3. Bose bavuga ikintu kimwe, ariko ibisabwa biratandukanye cyane. Noneho nzavuga itandukaniro riri hagati ya PSL1 na PSL2 muburyo burambuye:

1. PSL ni impfunyapfunyo yerekana urwego rwibicuruzwa. Urwego rwerekana ibicuruzwa byumurongo ugabanijwemo PSL1 na PSL2, birashobora kandi kuvugwa ko urwego rwiza rugabanijwemo PSL1 na PSL2. PSL2 iruta PSL1. Izi nzego ebyiri zisobanutse ntabwo zitandukanye gusa mubisabwa kugenzura, ariko no mubigize imiti hamwe nubukanishi. Kubwibyo, mugihe utumije ukurikije API 5L, ibikubiye mumasezerano ntibigaragaza gusa ibipimo bisanzwe nkibisobanuro hamwe n amanota yicyuma. , Ugomba kandi kwerekana urwego rwerekana ibicuruzwa, ni ukuvuga PSL1 cyangwa PSL2. PSL2 irakomeye kuruta PSL1 mubipimo nkibigize imiti, imiterere ya tensile, ingufu zingaruka, hamwe nigeragezwa ridasenya.

2, PSL1 ntisaba imikorere yingaruka, PSL2 amanota yose yicyuma usibye x80, igipimo cyuzuye 0 ℃ Akv igereranyo cyagaciro: uburebure ≥ 41J, transvers ≥ 27J. Icyiciro cya X80 icyiciro, cyuzuye-0 ℃ Akv igereranyo cyagaciro: uburebure ≥ 101J, guhinduranya ≥ 68J.

3. Imiyoboro y'umurongo igomba gukorerwa igeragezwa ryumuvuduko wamazi umwe umwe, kandi ibipimo ntibiteganya kwemerera ikizamini cyangiza cyangiza amazi. Iri kandi ni itandukaniro rinini hagati ya API nubushinwa. PSL1 ntisaba ubugenzuzi budasenya, PSL2 igomba kuba igenzura ridasenya umwe umwe.