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Chubu cha mkuwa chimapangidwa ndi 99.9% ya mkuwa woyeretsedwa ndi zinthu zazing'ono zosakaniza ndipo zimakwaniritsa miyezo yofalitsidwa ya ASTM. Zimabwera mumitundu yolimba komanso yofewa, zomwe zikutanthauza kuti chubucho chatsekedwa kuti chifewetsedwe. Machubu olimba amalumikizidwa ndi zolumikizira za capillary. Mapayipi amatha kulumikizidwa m'njira zina zingapo, kuphatikiza zolumikizira zokakamiza ndi zoyatsira. Zonsezi zimapangidwa ngati zomangira zopanda msoko. Mapaipi amkuwa amagwiritsidwa ntchito mu mapaipi, HVAC, firiji, kutumiza gasi wazachipatala, makina oponderezedwa a mpweya ndi makina a cryogenic. Kuphatikiza pa mapaipi wamba amkuwa, mapaipi apadera a alloy amapezekanso.
Mawu a mapaipi amkuwa ndi osagwirizana pang'ono. Pamene chinthu chipangidwa kukhala coil, nthawi zina chimatchedwa mkuwa chifukwa chimawonjezera kusinthasintha komanso kuthekera kopinda zinthu mosavuta. Koma kusiyana kumeneku sikuli kusiyana komwe kumachitika kawirikawiri kapena kovomerezeka. Kuphatikiza apo, mapaipi ena amkuwa olimba nthawi zina amatchedwa mapaipi amkuwa. Kugwiritsa ntchito mawuwa kumatha kusiyana kuchokera kwa ogulitsa osiyanasiyana.
Machubu onsewa ndi ofanana kupatula kusiyana kwa makulidwe a khoma, pomwe chubu cha K chili ndi makoma okhuthala kwambiri ndipo motero ndi okwera kwambiri. Machubu awa ndi ocheperako ndi 1/8″ kuposa mainchesi akunja ndipo amapezeka mu kukula kwa chubu cholunjika kuyambira 1/4″ mpaka 12″, onse okokedwa (olimba) ndi opindidwa (ofewa). Machubu awiri okhuthala a khoma amathanso kukulungidwa mpaka mainchesi 2″. Mitundu itatuyi imapangidwa ndi wopanga, wobiriwira wa K, wabuluu wa L, ndi wofiira wa M.
Mitundu K ndi L ndi yoyenera ntchito zopanikizika, monga kugwiritsa ntchito ma compressor a mpweya komanso kupereka gasi wachilengedwe ndi LPG (K ya pansi pa nthaka, L ya mkati). Mitundu yonse itatuyi ndi yoyenera madzi apakhomo (Mtundu M ndi woyenera), kugwiritsa ntchito mafuta ndi mafuta (Mtundu L, woyenera), kugwiritsa ntchito HVAC (Mtundu L, woyenera), ma vacuum units, ndi zina zambiri.
Mapaipi otulutsira madzi, zinyalala, ndi njira zotulutsira mpweya ndi opapatiza ndipo ali ndi mphamvu zochepa. Amapezeka m'makulidwe kuyambira mainchesi 1.5 mpaka 2.5 ndipo ali ndi mtundu wachikasu. Amapezeka m'makulidwe owongoka okwana mapazi 20, koma nthawi zambiri amakhala ndi kutalika kochepa.
Machubu omwe amagwiritsidwa ntchito kusamutsa mpweya wamankhwala ndi amtundu wa K kapena mtundu wa L wokhala ndi zofunikira zapadera zaukhondo. Mafuta omwe amagwiritsidwa ntchito popanga machubu ayenera kuchotsedwa kuti asapse pamene pali mpweya komanso kuti wodwalayo akhale ndi thanzi labwino. Machubu nthawi zambiri amatsekedwa ndi kutsekedwa akatsukidwa ndikuyikidwa pansi pa nayitrogeni wotsukidwa panthawi yoyika.
Machubu omwe amagwiritsidwa ntchito pokonza mpweya wabwino komanso kuziziritsa amasankhidwa ndi OD yeniyeni, zomwe ndi zosiyana ndi gululi. Miyeso imayambira pa mainchesi 3/8 mpaka 4-1/8 pautali wowongoka ndi mainchesi 1/8 mpaka 1-5/8 pa ma coil. Ponseponse, machubu awa ali ndi kupanikizika kwakukulu kwa mainchesi ofanana.
Machubu a mkuwa amapezeka m'mitundu yosiyanasiyana ya alloy kuti agwiritsidwe ntchito mwapadera. Machubu a mkuwa a Beryllium amatha kuyandikira mphamvu ya machubu a alloy achitsulo, ndipo kukana kwake kutopa kumapangitsa kuti ikhale yothandiza kwambiri pa ntchito zapadera, monga machubu a Bourdon. Alloy ya mkuwa-nickel imalimbana kwambiri ndi dzimbiri la m'nyanja, ndipo machubu nthawi zambiri amagwiritsidwa ntchito pa ntchito za m'nyanja komwe kukana kukula kwa barnacle ndi phindu lowonjezera. Cupro Nickel 90/10, 80/20 ndi 70/30 ndi mayina odziwika bwino a zinthuzi. Machubu a mkuwa a OFHC kapena opanda mpweya wambiri amagwiritsidwa ntchito kwambiri pa ma waveguides ndi zina zotero. Machubu a mkuwa ophimbidwa ndi titanium angagwiritsidwe ntchito pa ntchito zotenthetsera kutentha zowononga.
Monga tanenera kale, mapaipi amkuwa amalumikizidwa mosavuta pogwiritsa ntchito njira zotenthetsera monga kuwotcherera ndi brazing. Ngakhale njira izi ndizokwanira komanso zosavuta kugwiritsa ntchito monga madzi apakhomo, kutentha kumawonjezera mphamvu ya chubu chokokedwa, zomwe zimachepetsa kuthamanga kwake. Pali njira zingapo zamakani zomwe sizisintha mawonekedwe a chubu. Izi zikuphatikizapo zolumikizira zoyaka, zolumikizira zozungulira, zolumikizira zokhoma ndi zolumikizira zokakamiza. Njira izi zolumikizira zamakaniko ndizosavuta kwambiri pamene kugwiritsa ntchito malawi kapena kutentha sikotetezeka. Ubwino wina ndikuti zina mwa zolumikizira zamakaniko izi ndizosavuta kuchotsa.
Njira ina, yomwe imagwiritsidwa ntchito ngati nthambi zambiri ziyenera kutuluka mu chitoliro chimodzi chachikulu, ndikugwiritsa ntchito chida chotulutsira madzi kuti apange njira yotulukira mwachindunji mu chitolirocho. Njira iyi imafuna kulumikiza komaliza, koma sikufuna kugwiritsa ntchito zolumikizira zambiri.
Nkhaniyi ikufotokoza mwachidule mitundu ya mapaipi amkuwa. Kuti mudziwe zambiri za zinthu zina, chonde onaninso malangizo athu ena kapena pitani ku Thomas Supplier Discovery Platform kuti mupeze magwero omwe angapezeke kapena kuti muwone tsatanetsatane wa zinthu zina.
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