Menene NPT thread?

NPT tana nufin National Pipe Taper, wanda shine ma'auni na Amurka don zaren tef da ake amfani da su akan bututu da kayan aikin bututu don manufar rufewa. An ƙera zaren NPT don samar da hatimin da ba ya ɗigowa lokacin da aka yi amfani da shi tare da abin rufe bakin zaren, kamar tef ɗin Teflon ko bututu. Taper a kan zaren NPT yana ba shi damar yin hatimi lokacin da aka haɗa shi da wani zaren da aka ɗora.

Mahimman halaye na zaren NPT sun haɗa da:

1. Tafi:Diamita na waje (OD) na zaren yana raguwa kaɗan daga farkon zuwa ƙarshen zaren. Wannan tef ɗin, yawanci 1/16 inch a kowace inch, yana taimakawa wajen ƙirƙirar hatimi mai ƙarfi yayin da aka ɗaure sassan tare.

2. Wurin Zare: Zaren NPT suna da kusurwar zaren 60-digiri, kama da sauran ka'idodin zaren dunƙule da yawa, amma siffar da tazara an tsara su musamman don haɗin bututu.

3. Fita: Farar (yawan zaren kowane inch) ya bambanta dangane da girman bututu mai ƙima. Misali, 1/8-inch NPT yana da zaren 27 a kowace inch, yayin da 2-inch NPT yana da zaren 11.5 a kowace inch.

4. Tambari:Don tabbatar da hatimin da ya dace, dole ne a yi amfani da zaren sealant. Idan ba tare da shi ba, akwai yuwuwar yaɗuwa saboda ƙarfe-zuwa-ƙarfe kadai ba ya haifar da isasshiyar hatimi.

5. Daure Hannu:Za a fara daure zaren NPT da hannu, sannan a ba su ƙarin juyi tare da maƙarƙashiya don cimma hatimin da ya dace. Yawan ƙarin juyawa ya dogara da girman dacewa da kayan aiki; Gabaɗaya, ana ba da shawarar 1.5 zuwa 3.5 jujjuya bayan yatsa.

Ana amfani da zaren NPT akai-akai a cikin aikin famfo, na'ura mai aiki da ruwa, da tsarin huhu, da sauransu, inda ake buƙatar haɗin gwiwa mai aminci, mai yuwuwa. Har ila yau, akwai nau'in busasshen hatimi mai suna NPTF (National Pipe Taper Fuel) wanda aka ƙera don samar da hatimin injin ba tare da buƙatar wani keɓantacce ba, kodayake wasu aikace-aikacen na iya buƙatar abin rufewa don ƙarin tsaro.

Don wasu tambayoyi masu alaƙa da kayan aikin NPT ko sauran kasidarmu, da fatan za a tuntuɓe mu.