Menene ainihin bambanci tsakanin matakan NPT, BSP da G zaren?

Mafi sauƙin watsi da 'rami' a cikin zaɓin bawuloli da kayan aiki

A yawancin tambayoyin abokin ciniki, muna yawan fuskantar yanayi kamar haka:

"Ina buƙatar bawul ɗin ƙwallon ƙwallon da zaren mata a ƙarshen biyu."

"Dama, wane ma'aunin zaren za ku so?"

"Kawai madaidaicin zaren-daidai da akan bututun ruwa."

Irin wannan tattaunawar tana faruwa kusan kowane mako. Zaɓin ma'aunin zaren da ba daidai ba yana ɗaya daga cikin batutuwan gama gari kuma masu tsada a cikin siyan bawul. Idan ba za a iya shigar da bawul ɗin bayan sayan ba, ko kuma idan an daidaita shi amma ya kasa yin hatimi da kyau, yana haifar da ɗigogi, sakamakon yana fitowa daga ƙananan jinkiri zuwa buƙatar sake yin aikin gabaɗayan tsarin.

A yau, a cikin wannan ɗan gajeren labarin, za mu fayyace sau ɗaya kuma ga dukkan ma'auni guda uku mafi rikice rikice: NPT, BSP da G.,,

I. Bari mu fara da mafi mahimmancin bambance-bambance: daya shine 'mazugi', ɗayan kuma 'Silinda'.

Wannan yana samar da tushen fahimtar duk sauran bambance-bambance.

Nau'in zaren

Nau'in zaren	Cikakken suna	kusurwar jagora	Tsarin	Hanyar rufewa
NPT	Zaren Bututun Tapered na Ƙasar Amirka	60°	Zaren da aka ɗora (1:16 taper)	Zaren da kansa ya rufe
BSPT (ɓangare na jerin BSP)	Matsayin Biritaniya Tapered Pipe Thread	55°	Zaren da aka ɗora (1:16 taper)	Zaren da kansa ya rufe
G (bangaren jerin BSP)	Matsakaicin Tsarin Bututu na Biritaniya (BSPP)	55°	Zaren Silindrical (babu taper)	Rufewa ta ƙarshen fuska ko gasket
BSP	Biritaniya Standard Pipe Thread (tare)	—	Ya haɗa da BSPT (tapered) da BSPP (cylindrical)	Ya dogara da takamaiman nau'in

A takaice:

NPT = madaidaicin zaren zaren Amurka

BSPT = Biritaniya daidaitaccen zaren da aka ɗora

G thread (BSPP) = Madaidaicin zaren layi na Biritaniya

Dukansu NPT da BSPT suna da zaren taper tare da rabo iri ɗaya (1:16), amma sun bambanta a kusurwar zaren (NPT shine 60 °, yayin da BSPT shine 55 °).

II. Cikakken Rushewa: Menene NPT, BSP da G?

1. NPT Threads (American Standard)

Daidaitaccen Lamba: ASME B1.20.1

Halaye: 60° kusurwar zaren, 1:16 taper

Ka'idar hatimi: Ana samun hatimi ta hanyar tsangwama na zaren da kansu; ba a buƙatar gasket ɗin rufewa

Yankuna gama gari: Amurka, Kanada da sauran ƙasashe masu bin tsarin daidaitaccen tsarin Amurka

Ƙwararren ƙwallon ƙwallon ƙwallon ƙafa: 1/4' NPT, 3/8' NPT, 1/2" NPT

Lura: Zaren NPT suna buƙatar aikace-aikacen tef ɗin PTFE ko zaren sealant; sarrafa karfin juyi yana da mahimmanci a yayin taro, saboda tsangwama zai iya sa zaren mace ya rabu.

2. Zaren BSP (British Standard)

BSP kalma ce ta gaba ɗaya wacce ta ƙunshi nau'ikan guda biyu, waɗanda mutane da yawa sukan ruɗe:

BSPT (British Standard Pipe Thread)	G thread / BSPP (British Standard Pipe Thread)
Adadin Lamba	BS 21	BS 2779 / ISO 228-1
Kusurwar Zare	55°	55°
Gina	Zaren da aka ɗora (1:16 taper)	Zaren Silindrical (ba a ɗaure ba)
Hanyar rufewa	Hatimin kai (yana buƙatar Teflon tef)	An hatimce ta da hatimin fuska (misali O-ring, lebur mai wanki, wankin tagulla)
Aikace-aikace gama gari	Kasashen Commonwealth, Turai da sassan Asiya	Ana amfani dashi a duk duniya, musamman a Turai da Asiya
Yawan Bawul Valve Na kowa	1/4"BSPT, 3/8"BSPT, 1/2" BSPT	G1/4, G3/8, G1/2

Wannan shine inda babban kuskure ya ta'allaka: mutane da yawa suna ɗauka cewa 'Zaren BSP iri ɗaya ne da zaren G', amma wannan ba daidai ba ne. G zaren nau'in BSP ne, amma BSP kuma ya haɗa da BSPT. Zaren G suna da silindari, yayin da zaren BSPT suna tafe; Ka'idodin hatimi a bayan waɗannan biyun sun bambanta gaba ɗaya, kuma dole ne a yi amfani da su gaba ɗaya.

III. Tebur guda ɗaya don fahimtar duk bambance-bambance

Ma'auni na kwatanta	NPT	BSPT	G (BSPP)
Daidaitaccen Tsarin	Matsayin Amurka	British Standard	Matsayin Biritaniya (Ƙasashen Duniya)
Bayanan Haƙori	60°	55°	55°
Tsarin	Zaren da aka matse	Zaren da aka matse	Zaren Silinda
Tafi	1:16	1:16	Babu
Hanyar rufewa	Hatimin zaren (an nannade da Teflon tef)	Hatimin zaren (tare da Teflon tef)	Hatimin fuska (gasket/O-ring)
A'/ a cikin code	misali 1/2" NPT	misali 1/2" BSPT	misali G1/2
Ana iya musanya su?	Ba musanyawa da BSP ba	Ba za a iya canzawa tare da NPT ba	Ba musanyawa da BSPT ba

IV. Ta yaya za ku iya saurin bambance bambanci a aikace?

Idan kana da samfurin a hannunka ba tare da lakabi ba, za ka iya gane shi kamar haka:

Hanyar 1: Duba bayanan zaren (yana buƙatar ma'aunin zaren ko ma'aunin zaren)

60° bayanin martaba → NPT

Bayanan martaba 55° → jerin BSP (G ko BSPT)

Hanyar 2: Duba tsarin rufewa

Threads na buƙatar Teflon tef ko sealant → NPT ko BSPT (zaren da aka zana)

Yana buqatar lebur mai wanki, O-zobe ko wanki na tagulla → G zaren (zaren silinda)

Hanyar 3: Ƙidaya adadin zaren (hanyar ƙiyasin gaggawa)

Don girman ƙididdiga iri ɗaya, adadin zaren kowane inch ya bambanta tsakanin NPT da BSP. Misali, 1/2":

NPT: 14 zaren kowane inch

BSP (G/BSPT): Zaren 14 a kowace inch (wannan girman daidai yake da duka biyun, yana sauƙaƙa da rikicewa)

Duk da haka, don 3/4": NPT yana da zaren 14 kuma BSP yana da zaren 14 (har yanzu suna kama)

Bambanci na gaskiya yana cikin kusurwar zaren da taper, waɗanda ke da wuyar ganewa da ido tsirara; Hanyar da ta fi dacewa ita ce amfani da ma'aunin zare.

Hanyar 4: Bincika ƙasar asali ko bukatun abokin ciniki

Idan abokin ciniki ya dogara ne a Amurka kuma zane-zane ya ƙayyade ASME → NPT

Idan abokin ciniki ya dogara ne a Turai ko Commonwealth kuma zane-zane sun ƙayyade BS ko ISO → BSP

Idan zanen ya bayyana 'G' da lamba (misali G1/2) → zaren silinda; ana buƙatar mai wanki

V. Menene zai faru idan an yi zaɓi mara kyau? (Lambobin rayuwa na gaske)

Case 1: Wani masana'anta na kayan aiki ya samo nau'ikan bawul ɗin ball tare da zaren ciki na G1/2, amma zaren waje akan bututun abokin ciniki shine NPT 1/2. Wani ma'aikaci ya yi ƙoƙarin murƙushe bawul ɗin da ƙarfi har zuwa juyi huɗu amma bai iya ƙara kunna shi ba; a kan ƙara ƙarin ƙarfi tare da spanner, zaren jikin bawul ɗin ya rabu, yana mai da duka rukunin bawuloli marasa amfani.

Case na 2: Gidan gwaje-gwajen da ya dace da bawul ɗin ƙwallon ƙafa tare da zaren waje na BSPT zuwa dacewa tare da zaren ciki na G. An ji 'game da daidai' lokacin da aka kunna, amma gwajin matsa lamba ya nuna ɗan yatsa. An ɗauki kwanaki uku ana bincike don gano cewa zaren ɗin bai dace ba—an zare da aka ɗora a cikin zaren ciki na cylindrical, tare da ƴan zaren na farko kawai suna yin tuntuɓar, wanda ya haifar da ƙarancin rufewa.

Darasi: Idan ana maganar rashin daidaiton zaren, babu wani abu kamar 'kusa da isa'. Bambancin kawai 1° a cikin kusurwar zaren shine bambanci tsakanin rashin iya dacewa da bangaren da kuma rashin iya cimma hatimi.

VI. Shawarwari na ƙarshe don Siyan Ma'aikata da Injiniyoyi

Kafin yin oda, da fatan za a tabbatar kun tabbatar da cikakkun bayanai guda uku masu zuwa:

Daidaitaccen zaren (NPT ko BSP/G?)

Nau'in zaren (tapered ko cylindrical?)

Girman zaren (misali 1/4', 3/8', 1/2)

Tabbatar cewa an ƙayyade ma'auni akan zane daidai:

Matsayin Amurka: rubuta 1/2-14 NPT

Ma'auni na Biritaniya: rubuta 1/2 BSPT

Matsakaicin daidaitaccen Biritaniya: rubuta G1/2 ko 1/2 BSPP

Ba ku da tabbas game da ƙayyadaddun zaren bututunku? Mun zo nan don taimaka muku tabbatar da su.

Daidaita zaren shine mafi mahimmanci-kuma mafi kusantar kurakurai-bangaren tsarin aikin bututu. Kuskure guda ɗaya a cikin ma'aunin zaren zai iya haifar da gabaɗayan bawul ɗin bawul ɗin da ba za a iya amfani da su ba, ko ma haifar da ɗigogi da buƙatar sake yin aiki a duk tsarin aikin bututun.

Idan kuna da samfurori irin su bawul ɗin ƙwallon ƙafa, kayan aikin bututu ko haɗin haɗin gwiwa, ko kuma idan kuna da hoton zaren kuma ba ku da tabbacin mizanin-don Allah ku ji daɗin aiko mana da su a kowane lokaci, kuma za mu tabbatar muku da su kyauta.

Ba mu yin 'm kimantawa'; muna yin nuni da ma'auni kuma muna ɗaukar ainihin ma'auni ta amfani da ma'aunin zaren don samar muku da cikakkiyar amsa.

Yadda ake tabbatarwa:

Ɗauki hoto bayyananne na zaren ƙarshen fuska kuma a aika mana.

Ya fi dacewa idan kuna da samfurin jiki, kamar yadda za mu iya auna shi kai tsaye ta amfani da ma'aunin zaren.

Kuna iya tuntuɓar mu ta WeChat, tarho ko imel (cikakken bayanin lamba): clvy@shenchihb.com

Nau'in zaren za mu iya bayarwa:

Za a iya keɓance bawul ɗin ƙwallon mu da kayan aikin bututu don saduwa da ma'auni iri-iri, gami da NPT, BSPT da G (BSPP), yana tabbatar da daidaiton kashi 100 tare da tsarin aikin bututunku. Ko don kasuwar cikin gida ko don fitarwa, za mu iya kera zuwa zane-zanenku.

Zaɓi zaren da ya dace kuma ku guje wa matsalolin da ba dole ba. Idan ba ku da tabbas, bar shi gare mu don tabbatarwa.