Kodi NPT ndi chiyani?

NPT imayimira National Pipe Taper, yomwe ndi mulingo waku US wa ulusi wokhotakhota womwe umagwiritsidwa ntchito pamapaipi ndi zida zomangira mapaipi pofuna kusindikiza. Ulusi wa NPT adapangidwa kuti azipereka chisindikizo chopanda kutayikira akagwiritsidwa ntchito ndi chosindikizira ulusi, monga tepi ya Teflon kapena dope la chitoliro. Chojambula pa ulusi wa NPT chimalola kuti ipange chisindikizo chikalumikizidwa ndi ulusi wina wopendekera.

Zizindikiro zazikulu za ulusi wa NPT ndi:

1. Wojambula:Kunja kwa ulusi (OD) kwa ulusi kumachepa pang'ono kuyambira pachiyambi mpaka kumapeto kwa ulusi. Tepi iyi, nthawi zambiri inchi 1/16 pa inchi, imathandiza kupanga chisindikizo cholimba pamene zigawozo zimangiriridwa palimodzi.

2. Ulusi Ngongole: Ulusi wa NPT uli ndi ngodya ya 60-degree ulusi, yofanana ndi miyeso ina yambiri ya ulusi, koma mawonekedwe ndi masitayilo amapangidwa makamaka kuti agwirizane ndi mapaipi.

3. Phokoso: Mlingo (chiwerengero cha ulusi pa inchi) chimasiyanasiyana malinga ndi kukula kwa chitoliro. Mwachitsanzo, 1/8-inch NPT ili ndi ulusi 27 pa inchi, pamene 2-inch NPT ili ndi ulusi wa 11.5 pa inchi.

4. Chisindikizo:Kuti mutsimikizire chisindikizo choyenera, chosindikizira cha ulusi chiyenera kugwiritsidwa ntchito. Popanda izo, pali mwayi wochulukirachulukira chifukwa kukhudzana kwachitsulo ndi chitsulo kokha sikumapanga chisindikizo chokwanira.

5. Kulimbitsa Manja:Ulusi wa NPT uyenera kumangika pamanja choyamba, kenaka upatsidwe makhoti owonjezera ndi wrench kuti akwaniritse chidindo choyenera. Chiwerengero cha matembenuzidwe owonjezera chimadalira kukula kwa koyenera ndi zinthu; Nthawi zambiri, kutembenuka kwa 1.5 mpaka 3.5 kupitilira zala zolimba kumalimbikitsidwa.

Ulusi wa NPT umagwiritsidwa ntchito kwambiri popanga ma plumbing, ma hydraulics, ndi ma pneumatic system, pakati pa ena, komwe kulumikizidwa kotetezedwa, kotsimikizira kutayikira kumafunika. Palinso mtundu wosindikizira wowuma wotchedwa NPTF (National Pipe Taper Fuel) yomwe idapangidwa kuti ipereke chisindikizo chamakina popanda kufunikira kwa chosindikizira chosiyana, ngakhale kuti mapulogalamu ena angafunikirebe chosindikizira kuti awonjezere chitetezo.

Pamafunso ena aliwonse okhudzana ndi zokometsera za NPT kapena mndandanda wathu wonse wazogulitsa, chonde titumizireni.