Mumunda wekugadzira pombi, zviyero zvakasiyana uye zvakatemwa zvinoda kuteverwa kuti ive nechokwadi chemhando uye chengetedzo yechigadzirwa chekupedzisira.ASTM A139ndiyo imwe chiyero chakadaro chinoita basa rakakosha mukugadzirwa kwepombi dzesimbi kune dzakasiyana siyana.
ASTM A139 ndiyo yakajairwa yakatarwa ye electrofusion (arc) welded simbi pombi (NPS 4 uye pamusoro).Inovhara izvo zvinodikanwa zve spiral seam electrofusion (arc) welded, mutete madziro, austenitic simbi pombi yekuora kana yakanyanya tembiricha yekushandisa.Iyi chiyero inodonongodza zvinodikanwa zvezvishandiso, maitiro ekugadzira, hukuru uye michina zvimiro zvemapombi esimbi.
Izvo zvinodiwa zvezvinhu zveASTM A139 zvinotsanangura marudzi uye mamakisi esimbi anogona kushandiswa kugadzira mapaipi.Izvi zvinosanganisira kemikari yesimbi, iyo inofanira kunge iine zvikamu zvakasiyana zvezvinhu zvakadai se carbon, manganese, phosphorus, sulfur uye silicon.Izvi zvinodikanwa zvakakosha pakuona kuti simbi inoshandiswa mukatimapaipiinosangana nesimba rinodiwa uye corrosion resistance standards.
Iyo nzira yekugadzira yeASTM A139 pombi inosanganisira electrofusion (arc) welding, iyo inoshandisa arc yemagetsi kugadzira kupisa kunodiwa kubatanidza mitsetse yesimbi kuita cylindrical shape.Iyi nzira inonyatso kudzorwa kuti ive nechokwadi chekuti welds ndeyemhando yepamusoro uye haina hurema.Iyo chiyero zvakare inotsanangura nzira dzekuongorora dzema welds, senge ultrasonic bvunzo uye inotungamirwa inotungamirwa bend kuyedzwa, kuve nechokwadi kuti inosangana neinodiwa mhando zviyero.
Panyaya yezviyero, ASTM A139 inotsanangura zvinodiwa pakukura kwepombi, ukobvu hwemadziro, uye kureba.Izvi zvinosanganisira kushivirira kwakananga pazviyero kuve nechokwadi chekuti pombi inosangana nezvinodiwa zvekushandisa kwayo.Izvi zvinodikanwa zvedimensional zvakakosha pakuona kuti mapaipi akaiswa uye akabatana nemazvo mumhando dzakasiyana dzekushandisa.
Mechanical zvivakwa senge kusimba simba, goho simba, uye elongation zvakatsanangurwa zvakare muASTM A139.Zvinhu izvi zvakakosha pakusarudza simba uye kushanda kwepombi pasi pemamiriro akasiyana-siyana ekushanda.Iyo chiyero inoisa zvidiki zvinodikanwa kune aya ma mechanic zvivakwa kuti ive nechokwadi chekuti pombi inogona kumira inotarisirwa kudzvanywa, tembiricha uye mamiriro ezvakatipoteredza.
Pakazere, ASTM A139 inoita basa rakakosha mukugadzirwa kwemapaipi esimbizvemaapplication akasiyana siyana.Nekutsanangura izvo zvekushandisa, maitiro ekugadzira, hukuru uye michina zvimiro zvepombi, chiyero chinovimbisa kuti chigadzirwa chekupedzisira chinosangana nemhando inodiwa uye kuchengetedza zviyero.Inopa vagadziri, mainjiniya uye vashandisi vekupedzisira chivimbo chekuti pombi ichaita sezvaitarisirwa mukushandiswa kwayo.
Muchidimbu, kunzwisisa kukosha kweASTM A139 mukugadzira pombi kwakakosha kuve nechokwadi chemhando uye kuchengetedzeka kwezvigadzirwa zvepombi dzesimbi.Iyo chiyero inotaridza zvinodikanwa zvinodikanwa zvezvishandiso, maitiro ekugadzira, zviyero uye michina zvivakwa kuti ive nechokwadi chekuti mapaipi anosangana nemhando inodiwa uye maitiro ekuita.Nekuomerera kune ASTM A139, vagadziri vanogona kugadzira emhando yepamusoro simbi pombi inosangana nezvinodiwa zveakasiyana maindasitiri uye maapplication.
Nguva yekutumira: Zvita-28-2023