Ukufakwa Kwekhodi Komucu: I-NPSM, NPTF, NPT, ne-BSPT Kuchaziwe

Ingabe ukhathazekile ngokungaqondi i-NPSM, NPTF, NPT, ne-BSPT imicu? Lesi sihloko sizokuqondisa ekuqondeni okuningiliziwe kwalolu chungechunge, futhi ikufundise ukuthi ungalufaka kanjani kanye nokucatshangelwa okubalulekile.

Ukuhlaziywa Okuningiliziwe Kwezinhlobo Zezintambo

Izintambo ze-NPT (National Pipe Taper).

Incazelo, Izimpawu, kanye Nezisekelo Zokuklama

I-NPT imele i- National Pipe Tapered . Iwuhlobo lwentambo ecijile  esetshenziselwa ukuhlanganisa amapayipi nokufakwa. Nakhu okudingeka ukwazi:

l Imicu Eqoshiwe : Imicu ye-NPT inyakaza ngenani elingu-1/16 intshi iyintshi ngayinye, okusho ukuthi iba mincane ngasekupheleni.

l Amazinga Wochungechunge : Alandela izinga le- ANSI/ASME B1.20.1  .

l I -Engeli yochungechunge : Imicu ine -engeli yeflank engu-60°.

l Ukusebenza kahle Kokuvala : Bakha uphawu lwemishini  ngokuhlangana kokuphazamiseka  phakathi kwezintambo  kanye nezimpande.

Izicelo Ezinhlelweni Zokubhobhoza Nokusetshenziswa Kwemboni

Imicu ye-NPT ikuyo yonke indawo kumasistimu okucindezela . Zisetshenziselwa ukuqinisekisa ukuvuza okungavuzi  ku-:

l Ukudlulisa Uketshezi Negesi : Amapayipi athwala amanzi, uwoyela, noma igesi.

l Amasistimu Wokulinganisa Ukucindezela : Izisetshenziswa ezikala ingcindezi.

Izimboni ezisebenzisa imicu ye-NPT zifaka:

l Ukukhiqiza

l Ezezimoto

l I -Aerospace

Amathiphu okufaka, imikhuba emihle, kanye nokusetshenziswa okuvamile

Uma ufaka uchungechunge lwe-NPT, landela lezi zindlela ezihamba phambili:

1. Sebenzisa i-PTFE Tape : Goqa itheyiphu ye-PTFE  (Teflon) eduze kwentambo yesilisa ukuze uthuthukise uphawu.

2. Ungaqinisi Kakhulu : Ukuqinisa ngokweqile kungabangela i-galling , lapho imicu yonakala khona.

3. Hlola Ukuvuza : Hlola njalo uxhumano ukuze uthole ukuvuza.

Ukusetshenziswa okuvamile kufaka:

l Amapayipi Axhumayo : Njengakumapayipi asekhaya lakho.

l Ukufakwa : Njengezindololwane noma amathayi asiza ukuguqula isiqondiso sokugeleza.

Izinzuzo, Imikhawulo, kanye Nomehluko kusuka ku-NPTF

Izinzuzo:

l Uxhumano Olungavuziyo : Zenzelwe ukudala isigxivizo esiqinile.

l Kwamukelwe Kabanzi : I-NPT iyindinganiso ezimbonini eziningi.

Imikhawulo:

l Ingozi Yokuqinisa Kakhulu : Kungenzeka ukulimaza imicu.

l Ingase Idinge I-Sealant : Ngezinye izikhathi, i-sealant eyengeziwe iyadingeka ukuze kuqinisekiswe uphawu olungavuzi.

Umehluko ku-NPTF:

l I -NPTF , noma i-National Pipe Taper Fuel , eyaziwa nangokuthi i-Dryseal American National Standard Taper Pipe Thread , iklanyelwe ukunikeza uphawu oluqinile ngaphandle kwesidingo se-sealant eyengeziwe.

l Imicu ye-NPTF  inomklamo ohluke kancane ovumela uxhumo lwemishini  ngaphandle kokusebenzisa itheyiphu ye-PTFE  noma amanye ama-sealant, ngokungafani nemicu ye-NPT evame ukuyidinga.

Khumbula, i-NPT imayelana nokudala uxhumano lwentambo yepayipi elicijile  elithembekile nelisetshenziswa kabanzi. Noma ngabe usebenza emotweni noma ulungisa ukuvuza ekhaya, ukwazi ngochungechunge lwe-NPT kukusiza ukuthi wenze ukuxhumana okungcono.

 

I-NPTF (National Pipe Taper Fuel) Imicu

Uhlolojikelele lwe-NPTF Thread Standards and Design

Imicu ye-NPTF, eyaziwa nangokuthi i-Dryseal American National Standard Taper Pipe Thread , ilandela amazinga e -ANSI B1.20.3  . Lezi zintambo zifana ne-NPT kodwa zenzelwe uphawu olungcono. Imicu ye-NPTF ine -engeli ye-flank engu-60°  futhi idala uphawu lomshini  ngokusebenzisa ukulingana kokuphazamiseka  phakathi kwama-crest entambo nezimpande. Lokhu kusho ukuthi izintambo ziyaphahlazeka ukuze zakhe uphawu oluqinile ngaphandle kokudinga ama-sealant engeziwe.

Umehluko Phakathi kwe-NPT ne-NPTF

Ngenkathi imicu ye-NPT ne-NPTF ibukeka ngokufanayo, imiklamo yabo ihlukile . Imicu ye-NPT yakhelwe ngaphansi kwe -ANSI/ASME B1.20.1 , futhi ingase idinge itheyiphu ye-PTFE  noma ezinye izinsimbi ukuze kuqinisekiswe ukuxhumeka okungavuzi . Ngakolunye uhlangothi, izintambo ze-NPTF, ezilandela i-ANSI B1.20.3 , zenziwa ukuthi zinenetha ziqine futhi zakhe uphawu ngaphandle kwezinto ezengeziwe. Lokhu bakufeza ngomklamo ovumela izintambo  kanye nezimpande  ukuthi zihlangane, zenze uphawu olungavuzi..

Izicelo ku-Fuel neGas, Ukuzuza Seals Okuvuzayo Okungavuzi

Emhlabeni kaphethiloli negesi , uchungechunge lwe-NPTF luyinketho yokukhetha. Zenzelwe ukwenza isivalo esingavuzi  esibalulekile ezinhlelweni zokucindezela . Lezi zinhlelo azikwazi ukukhokhela ukuvuza, njengoba ngisho nencane ingaba yingozi. Imicu ye-NPTF isetshenziswa ezinhlelweni zokulinganisa ingcindezi  nezingxenye lapho ukugcinwa kobumsulwa nobuqotho boketshezi noma igesi kubalulekile.

Izimo Zokusebenzisa, Ukuhambisana, kanye Nokushintshisana nge-NPT

Imicu ye-NPTF ivame ukutholakala ezinhlelweni zokusebenza lapho uphawu olungavuzi  lubalulekile, futhi akukho sealant edingekayo. Nokho, nakuba uchungechunge lwe-NPTF ne-NPT ngezinye izikhathi lungaxutshwa, lokhu akuhlali kuphephile noma kusebenza kahle. Imicu ye-NPTF ingajikijelwa ekufakweni kwe-NPT, kodwa okuhlehlayo kungase kungavaleki kahle ngenxa yokuthi i-NPTF yakhelwe ukulingana okuseduze. Kubalulekile ukuhlola ukuhambisana ngaphambi kokuwaxuba ukuze ugweme izinkinga ezifana nokugwazwa  noma ukuvala ngokungafanele.

Izintambo ze-NPSM (National Pipe Straight Mechanical).

Incazelo, Izimpawu, kanye Nezisekelo Zemiluko ye-NPSM

Imicu ye-NPSM iwuhlobo lwemicu yepayipi eqondile . Balandela amazinga e -ANSI/ASME B1.20.1  . Lezi zintambo zenzelwe ukuxhumana ngomshini  kunokwenza uphawu. Ane- angle yeflank engu-60°  futhi ahloselwe ukusetshenziswa ne -gasket  noma i-O-ring  ukuze kwakheke uxhumano olungavuzi..

Amaphuzu abalulekile  mayelana nemicu ye-NPSM: - Ayahambisana , okusho ukuthi ububanzi buyafana. - Imicu ye-NPSM ayinciphisi njengemicu ye -NPT  (National Pipe Tapered). - Asetshenziselwa ukwenza ukuxhumana ngomshini . - Ukusebenza kahle kokuvala  kuvela kuma-gaskets, hhayi izintambo ngokwazo.

Izicelo Ezinhlelweni Ze-Hydraulic kanye Nezimo Zokusebenzisa Okufanelekile

Imicu ye-NPSM ivame ukutholakala ezinhlelweni zamanzi  lapho uphawu olungavuzi  lubalulekile. Asebenza kahle ezinhlelweni zokucindezela  njengezinhlelo zokulinganisa umfutho . Ukufakwa kwe- Female Pipe Swivel  kuvamile ngemicu ye-NPSM, okuvumela ukufakwa kalula ezindaweni eziqinile.

Izimo ezikahle zokusebenzisa  zihlanganisa: - Lapho uphawu lwemishini  lubaluleke kakhulu kunophawu lwentambo. - Izinhlelo ezidinga ukuhlakazwa njalo nokuhlanganisa kabusha. - Uma usebenzisa i-gasket  noma i-O-ring  kukhethwa kune -thread sealant.

Ukuqhathanisa Nezinye Izinhlobo Zochungechunge, Ukushintshelaniswa ne-NPTF

I-NPSM kwesinye isikhathi ingadideka ne -NPTF  (National Pipe Taper Fuel), eyaziwa nangokuthi i-Dryseal American National Standard Taper Pipe Thread . Nansi indlela abaqhathanisa ngayo:

l Imicu ye -NPTF  yakhelwe ukuhlinzeka ngophawu olungavuzi  ngaphandle kwesidingo sezinsimbi ezengeziwe. Bakha ukuhlangana kokuphazamiseka  phakathi kwama -thread crests  kanye nezimpande zentambo.

l Imicu ye -NPSM  idinga i-gasket  noma i-O-ring  ukuze kuqinisekiswe ukuxhumana okungavuzi.

l I-NPSM ayishintsheki ne -NPTF  noma i-NPT  ngenxa yamazinga ahlukene entambo.

Ukusebenza kahle Kokuvala kanye Nezicelo Zemboni

Imicu ye-NPSM ibaluleke kakhulu ekusebenzeni kwayo kokuvala  uma isetshenziswa ngophawu olufanele lomshini . Asetshenziswa kakhulu ku-: - Izicelo zokudlulisa uketshezi negesi  . - Izimboni ezidinga uxhumano oluthembekile lwemishini.

Izicelo zemboni  zihlanganisa: - Ukuhlanza amanzi kanye namanzi angcolile. - Amasistimu we-pneumatic. - Amasistimu okugcoba.

I-BSPT (i-British Standard Pipe Taper) Imicu

Isingeniso ku-BSPT Thread Standards

Uma sikhuluma ngochungechunge lwe-BSPT , singena emhlabeni wamapayipi nokuxhumana okubalulekile ekudluliseni uketshezi negesi . I-BSPT imele i- British Standard Pipe Taper . Iwuhlobo lwentambo ecijile  esetshenziselwa ukwenza uphawu olungavuzi . Leli zinga lichazwe kumadokhumenti afana ne- BS 21  ne -ISO 7.

Izici Ezihlukile Nokuqhathanisa ne-NPT ne-NPTF

Imicu ye-BSPT ihlukile. Ane- engeli ye-flank engu-60°  futhi acijile, okusho ukuthi aya ngokuya abe mincane njengoba ejula. Lokhu kwehlukile emicu ye-NPT , ephinde yacishwa kodwa ine-engeli yentambo engu-60° esetshenziswa eMelika, njengoba kuchazwe yi -ANSI/ASME B1.20.1.

Manje, ake siqhathanise i-BSPT ne- NPTF . I-NPTF, noma i-National Pipe Taper Fuel , evame ukubizwa ngokuthi i-Dryseal American National Standard Taper Pipe Thread , njengokusho kwe -ANSI B1.20.3 , yakhelwe uphawu oluqinile kune-NPT. Ifinyelela lokhu ngokudala ukuhlangana kokuphazamiseka  phakathi kwama- crests entambo  nezimpande zomucu . I-BSPT ayincikile kulokhu kufakwa uphawu. Esikhundleni salokho, ingase idinge i -thread sealant  efana ne -PTFE tape (Teflon)  noma i -gasket  ukuvimbela ukuvuza.

I-BSPT ku-International and Global Applications

Imicu ye-BSPT isetshenziswa kakhulu ngaphandle kwase-United States, ikakhulukazi emazweni alandela izindinganiso zobunjiniyela baseBrithani. Zivame ukubonakala ezinhlelweni zokucindezela  kanye nezinhlelo zokulinganisa ingcindezi . Ikhono labo lokudala uphawu lomshini  libenza bafaneleke izicelo eziningi zamazwe ngamazwe.

Ukuhlaziya Ukuqhathanisa Nezinye Izinhlobo Zomucu

Uma sibheka i-BSPT eceleni kwezinye izinhlobo zentambo ezifana ne -NPSM (National Pipe Straight Mechanical)  kanye ne-BSPP (British Standard Parallel Pipe) , sibona ukuthi i-BSPT eyokudala uxhumano olungavuzi  emicu ecijile, kuyilapho i-NPSM ne-BSPP okwezintambo zamapayipi aqondile . Izintambo ze-BSPT zenza uxhumano lwemishini  ngaphandle kokudinga indandatho eboshiwe  noma i-O-ring , ngokungafani ne-BSPP engase idinge lokhu ukuze ivalwe.

 

Izintambo ze-BSPT zinhle kakhulu ezimweni lapho udinga uphawu oluqinile, olungavuzi  ngaphandle kobunzima bezinye izindlela zokuvala. Kulula ukuzisebenzisa kunezintambo ze-NPTF , ezidinga ukulinganiswa kwengcindezi okunembayo  ukuze kugwenywe izinkinga ezifana nokugaya  noma ukulimala ngenxa yokuqina ngokweqile.

Ukucaciswa Kwezobuchwepheshe Namazinga

Izilinganiso Ezijwayelekile, Izibalo Zochungechunge, Namazinga e-ANSI

Uma sikhuluma ngokufakwa kwentambo  okufana ne-NPSM, NPTF, NPT, ne-BSPT, konke kumayelana nendlela axhuma futhi avale ngayo amapayipi. Lezi zimiso zochungechunge  zisisiza ukuthi senze isiqiniseko sokuthi izinto zihlangana kahle. Kucabange njengamabhulokhi e-LEGO - adinga ukuhambisana ngokuphelele ukuze anamathele ndawonye.

l I-NPSM  ne -NPS  inezintambo eziqondile, okusho ukuthi aziqini njengoba zingena.

l I-NPT , NPTF , kanye ne -BSPT  acishiwe. Lokhu kusho ukuthi ziyaqina, ezifana nefaneli, esiza ukumisa ukuvuza.

I- American National Standards Institute (ANSI)  ibeka imithetho yalolu chungechunge e-US Ngokwesibonelo, i-ANSI/ASME B1.20.1  eyemicu ye-NPT. Zisitshela ukuthi izintambo kufanele zibe zinkulu kangakanani, zingaki kuma-intshi (lokho isibalo sentambo), kanye nokuma okumele zibe nakho.

Impahla, Amazinga Okukhiqiza, Nokuhambisana

Izinto ezibonakalayo zibaluleke kakhulu. Izinto eziningi ezifakwayo ziyinsimbi, njengensimbi noma ithusi, ngoba ziqinile. Ukwenziwa kwalezi zingxenye kulandela imithetho eqinile ukuze kuqinisekiswe ukuthi ziphephile futhi zizohlala isikhathi eside. Lokhu kumayelana nokuthobela umthetho  - njengokulandela iresiphi yokubhaka ikhekhe eliphelele ngaso sonke isikhathi.

I- ANSI B1.20.3  kanye ne -AS 1722.1  kungamanye amazinga aqondisa indlela yokwenza imicu yezinhlelo zokucindezela.

l E-UK, basebenzisa i-BS 21  ne -ISO 7  kuchungechunge lwe -BSPT  ne -BSPP  .

Abakhiqizi futhi kufanele baqinisekise ukuthi imicu yabo ingakwazi ukumelana nengcindezi okufanele bayenze ngaphandle kokuvuza noma ukuphuka. Yilapho ukuqinisekiswa kwekhwalithi  kungena khona.

Ukuqonda Ubukhulu Bochungechunge, Ukubekezelela, kanye Nokuqinisekiswa Kwekhwalithi

Ubukhulu bentambo buhlanganisa iphimbo  (ikude kangakanani imicu) kanye ne- engeli  yezintambo. Isibonelo, imicu ye-BSPT ine- angle ye-flank engu-60° , okuyingxenye yalokho eyenza ihluke.

l Ukubekezelelana  umehluko omncane ovunyelwe kusayizi nokuma kwemicu. Bafana negumbi lokunyakazisa izicucu ezihambisanayo.

l Ukuqinisekiswa kwekhwalithi  kusho ukuhlola zonke izingxenye ukuze uqiniseke ukuthi ziyahlangabezana nezindinganiso. Kufana nothisha ohlela umsebenzi wakho wesikole ukuze aqiniseke ukuthi uthole izimpendulo ngendlela efanele.

Ukuze uthole uphawu olungavuziyo , izingxenye ezifana ne -PTFE tape (Teflon) , gaskets , noma ama-O-rings  angasetshenziswa nale micu. Imicu ecijile  njenge -NPT  ne -BSPT  ivamise ukuzivalela ngokwazo ngenxa yokuma kwayo - iya iqina futhi iqina njengoba ijikijelwa.

Amaqiniso asheshayo:

l Imicu ye-NPT  idizayinelwe ukuthi ilingane nokuphazamiseka , okusho ukuthi yakha uphawu lomshini  ngokumpintshana ndawonye.

l Imicu ye-NPSM  isebenza ngepayipi lesifazane elijikajikayo  - uhlobo lwenadi elikuvumela ukuthi uligoqe ngaphandle kokusonta ipayipi lonke.

l Izintambo ze-NPTF  ngezinye izikhathi zibizwa ngokuthi i-Dryseal American National Standard Taper Pipe Thread  ngoba zenzelwe ukuvala ngaphandle kokudinga izinto ezengeziwe njenge-tape noma ukunamathisela.

Izicelo Ezisebenzayo kanye Nokuhlaziya Okuqhathanisayo

Izicelo Zomhlaba Wangempela kanye Nezifundo Zezinhlobo Ezihlukene Zezintambo

Uma kuziwa ekufakweni kochungechunge  olusetshenziswa ezinhlelweni zokucindezela , imininingwane ibalulekile. Ake sibheke ukuthi lezi zintambo zisetshenziswa kanjani emhlabeni wangempela.

Imicu ye-NPT  ivame ukutholakala ezinhlelweni ezijwayelekile zezimboni. Isibonelo, umkhiqizi wamasistimu okulinganisa umfutho  angase asebenzise ukufakwa kwe-NPT ngenxa yokuhambisana kwazo nezinhlobonhlobo zezisetshenziswa.

Imicu ye-NPTF , eyaziwa nangokuthi i-Dryseal American National Standard Taper Pipe Thread , yakhelwe uphawu oluvikeleke kakhulu, olungavuzi ngaphandle kwesidingo se -sealant yentambo eyengeziwe . Asetshenziswa ezinhlelweni lapho i- mechanical seal  ibalulekile, njengasezintweni ezikhipha uphethiloli.

Imicu ye-NPSM , noma i-National Pipe Straight Mechanical , ngokuvamile isetshenziswa ngokuzungeza kwepayipi lesifazane . Ucwaningo oluyisibonelo lungase lubandakanye isistimu ye-hydraulic lapho ukufakwa kwe-NPSM kuvumela ukuhlanganisa nokugcinwa okulula.

Imicu ye-BSPT , eno- 60° flank angle , ivamile ezinhlelweni zamazwe ngamazwe. Zivamise ukukhethwa ngenxa yokusebenza kahle kwazo kokuqina  ezinhlelweni zokudlulisa uketshezi negesi.

Ukuhlaziywa Okuqhathanisayo: I-NPT iqhudelana ne-NPTF, i-NPSM iqhudelana ne-NPT, Isikhundla Esiyingqayizivele se-BSPT

Ake sihlukanise umehluko:

l I-NPT iqhudelana ne-NPTF : Kokubili kunomucu wepayipi ocijile , kodwa i-NPTF inikeza ukulingana kokuphazamiseka  phakathi kwama -crest entambo  nezimpande zomucu , isusa isidingo se-sealant.

l I-NPSM iqhudelana ne-NPT : I-NPSM inochungechunge lwamapayipi aqondile  futhi idinga i-gasket noma i-O-ring ukuze idale uxhumano olungavuzi . Imicu ecishiwe ye-NPT yenza uphawu ngemicu ngokwayo.

l Isikhundla Esiyingqayizivele se-BSPT : Imicu ye-BSPT iyafana ne-NPT kodwa ine- engeli yentambo ehlukile  kanye nokuphakama , okubenza bangashintshani nokufakwa kwe-NPT.

Imibono Yochwepheshe kanye Nezeluleko Zochwepheshe Bemboni Ngokufakwa Kwentambo

Ochwepheshe bemboni baphakamisa ukuthi kusetshenziswe itheyiphu ye-PTFE (Teflon)  noma iringi eboshiwe  enokufakwa kwe-NPT ukuze kuqinisekiswe uphawu olungavuzi . Ku-NPTF, kubalulekile ukuqinisekisa ukubandakanyeka okufanele ukuze kuzuze umsebenzi wayo we-dryseal  .

Uma usebenza ngoxhumo lwe-BSPT , khumbula ukuthi aluhambisani ne-NPT noma i-NPTF ngaphandle kwama-adaptha. Ochwepheshe bayeluleka ukuhlola izindinganiso zochungechunge  ezifana ne -ANSI/ASME B1.20.1  ye-NPT, ANSI B1.20.3  ye-NPTF, noma i-ISO 7  ne -BS 21  ye-BSPT ukuze kuqinisekiswe ukufaneleka okufanele.

I-Galling , noma ukulimala kwentambo, kuyingozi ngalokhu kufakwa. Ukuyinqanda, ungalokothi uqinise ngokweqile futhi ulandele njalo ukucaciswa kwezinhlelo zokucindezela .

Ukufaka, Ukunakekela, kanye Nemikhuba Engcono Kakhulu

Imikhuba Engcono Kakhulu Yokufaka Izinhlobo Ezihlukene Zezintambo

Lapho ufaka i-NPSM , NPTF , NPT , noma ukufakwa kwe -BSPT  , kubalulekile ukulandela imihlahlandlela ethile ukuze uqinisekise ukuxhumeka okungavuzi . Nansi inkomba esheshayo:

I- NPT  ne- NPTF :

l Faka iteyiphu ye-PTFE  noma isivalo sentambo esifanelekile  entanjeni yesilisa.

l Qinisa ukufaka ngesandla, bese usebenzisa isikrufu ukujika kokugcina.

l Qaphela ukuthi ungaqini kakhulu, ngoba lokhu kungalimaza izintambo.

I- BSPT :

l Ngokufana ne-NPT, sebenzisa i-PTFE tape  noma isivalo somucu.

l Qinisa ngokucophelela ukuze uthole uphawu lwemishini.

I- NPSM :

l Lezi zintambo zenzelwe ukuhlangana nepayipi lesifazane elijikajikayo.

l Sebenzisa i-gasket  noma i-O-ring  ukuze uvale.

l Ungaqinisi kakhulu, ngoba kungabangela umonakalo ku- gasket.

Izinselelo Ezijwayelekile Ekufakeni nokuthi Ungakunqoba Kanjani

I- Cross-threading : Kwenzeka uma imicu ingaqondanisiwe. Njalo qala ngesandla ukuze ukuvimbele.

l I-Galling : Ukuthintana kwe-Metal-to-metal kungabangela lokhu. Sebenzisa okokugcoba ukuze ukugweme.

l Ukuqinisa ngokweqile : Kungaholela ekulimaleni kwentambo. Landela imihlahlandlela yesistimu yokulinganisa ingcindezi  ukuze uthole itorque efanele.

l Ukuvuza : Uma ukuvuza kwenzeka, bheka ukuthi akunandingilizi  futhi uqinisekise ukubandakanyeka okufanele kwentambo.

Ukunakekela, Ukuxazulula Inkinga, Nokuqinisekisa Ubude Obude Bokufakwa Kwentambo

l Ukuhlola Okuvamile : Hlola izimpawu zokuguga, ukugqwala, noma umonakalo.

l Ukuhlanza : Gcina imicu ihlanzekile. Ukungcola kungabangela ukuvuza.

l Ukusetshenziswa kabusha kwe-Sealant : Ngokuhamba kwesikhathi, ama-sealants angehlisa izinga. Faka isicelo kabusha njengoba kudingeka.

l Isitoreji Esifanelekile : Gcina izinsimbi eziyisipele endaweni eyomile, ehlanzekile.

Khumbula :

l Imicu  ye-NPT  ne NPTF  yenza uphawu ngokulingana kokuphazamiseka  phakathi kwama -crests  nezimpande - .

l Imicu  ye-BSPT  ivalwa ngemicu yodwa, nge- angle ye-flank engu-60°  isiza ekuvaleni ukusebenza kahle.

l Imicu ye  -NPSM  incike ekuxhumekeni komshini , ngokuvamile okuthuthukiswa nge -gasket  noma i-O-ring.

Imibuzo Evame Ukubuzwa Ekufakweni Kwentambo

Umehluko Obalulekile Phakathi kwe-NPSM, NPTF, NPT, kanye ne-BSPT Threads

Uma kuziwa ekufakweni kwentambo , kufana nendida. Isiqephu ngasinye silingana ngendlela ethile. Imicu ye -NPSM  (National Pipe Straight Mechanical) iqondile futhi yakhelwe amajoyinti emishini alingana mahhala. Izintambo ze -NPT  (National Pipe Tapered) ziyacishwa futhi zenza uphawu oluqinile ngokufaka ukujula njengoba zigoqwa. I-NPTF  (National Pipe Taper Fuel), eyaziwa nangokuthi i-Dryseal American National Standard Taper Pipe Thread , ifana ne-NPT kodwa yakhelwe uphawu olungcono ngaphandle kokudinga isitywini esingeziwe. Izintambo ze -BSPT  (British Standard Pipe Taper), ngakolunye uhlangothi, zisetshenziselwa ukwenza izigxivizo eziqinile ezinhlelweni zokucindezela futhi zine-angle ye-flank engu-55°, ehlukile ku-engeli engu-60° esetshenziswa emicungweni ye-NPT.

Ukushintshelana, Ukuxhumana Okungavuziyo, namaphutha Avamile

Manje, ungawaxuba? Akunjalo Empeleni. Ukushintshelana  akuwona umdlalo ofuna ukuwudlala ngokufakwa kwentambo. Ukusebenzisa i-NPT  ne -NPTF  kwesinye isikhathi kungasebenza, kodwa akuqinisekisiwe ukuthi kuwuxhumano olungavuzi . Futhi BSPT ? Indaba ehluke ngokuphelele ngenxa ye-engeli yayo yentambo ehlukile kanye nephimbo. Iphutha elivame kakhulu? Ngokucabanga ukuthi zonke ziyalingana. Ngaso sonke isikhathi hlola izindinganiso, njenge- ANSI/ASME B1.20.1  ye-NPT, ukuze ugweme ukuvuza noma ukulimala.

Ukunquma Uhlobo Lochungechunge Olulungile lwezinhlelo zokusebenza ezithile

Ngakho-ke, ukhetha kanjani okulungile? Cabanga ngomsebenzi. Ngokudluliswa koketshezi negesi , isivalo esingavuzi  sibalulekile. Uma usebenza nezinhlelo zokucindezela , i-BSPT  kungase kube indlela okufanele uhambe ngayo. Kuzinhlelo zokusebenza ezidinga uphawu olusebenza ngomshini  ngaphandle kwe-sealant, i-NPTF  ingumngane wakho. Futhi ngoxhumo lwemishini  olungahlukaniswa kalula, i-NPSM  ingaba inketho engcono kakhulu.

Imibuzo Evame Ukubuzwa Eyengeziwe Ikhuluma Nokukhathazeka Okusebenzayo

l Iyini i-sealant enhle? 

Itheyiphu ye-PTFE  (Teflon) ivamise ukusetshenziswa nemicu ye-NPT ukusiza ukuvala.

l Kufanele ngizibophe ziqine kangakanani? 

Hamba ngokulingana kokuphazamiseka -qina ngokwanele ukuze intambo ibambene  nezimpande zicindezele  ndawonye, ​​kodwa zingaqini kangangokuthi ukhumula imicu.

l Kuthiwani ngama-engeli? 

Khumbula, i-NPT  ne -NPTF  zine -engeli ye-flank engu-60° , futhi i-BSPT  ine -engeli engu-55°.

l Ngingakwazi ukuphinda ngisebenzise lokhu kufakwa?

 Ngezinye izikhathi, kodwa qaphela ukudubuka —lapho imicu iguga futhi inamathelana.

l Kuthiwani uma kuvuza?

 Hlola umonakalo noma zama indandatho eboshiwe  noma i -O-ring  ukuze uthole isendlalelo esengeziwe sokuvikela.

Khumbula, ukuthola okulingana kahle kufana nokukhetha ithuluzi elifanele lomsebenzi. Konke kumayelana nemininingwane. Gcina lawa mathiphu engqondweni, futhi uzobe usendleleni yokuba ingcweti kokufakwa kwentambo  ukuze uthole ukuxhumana okungavuzi..

Isiphetho

Uma sikhuluma ngokufakwa kwentambo  njenge -NPSM , NPTF , NPT , kanye ne -BSPT , sikhuluma ngezingxenye ezisisiza ukuthi sihlanganise amapayipi namapayipi ndawonye. Lezi zinto ziqinisekisa ukuthi amanzi ethu, igesi, nezinye izinto zihamba ngamapayipi ngaphandle kokuvuza. Nakhu esikufundile:

I- NPT  iwuhlobo lwentambo ecijile  esetshenziswa kakhulu e-USA. Kwenza kulingane ngoba imicu iba mincane ekugcineni, efana nekhoni.

l I -NPTF , eyaziwa nangokuthi i-Dryseal American National Standard Taper Pipe Thread , ifana ne-NPT kodwa yakhelwe ukwenza uphawu olungavuzi oluqine nakakhulu  ngaphandle kokudinga izinto ezengeziwe njenge -PTFE tape..

l I -NPSM , noma i- National Pipe Straight Mechanical , inezintambo zamapayipi eziqondile . Kuhle ukwenza uxhumano lwemishini  olungahlukaniswa futhi luhlanganiswe kalula.

l I-BSPT , emfushane ye- Standard Pipe Taper , ifana ne- NPT kodwa ine- engeli ehlukile yentambo  nephimbo . British Kuvamile ezindaweni ezisebenzisa izindinganiso zaseBrithani.

Khumbula, ukuthola ukulingana okulungile kusho ukwazi izindinganiso zentambo yakho  nokukhetha uhlobo olufanele lwezinhlelo zakho zokucindezela.

Amathrendi Azayo Ekufakeni Izintambo Ezobuchwepheshe Nezincomo Zemboni

Umhlaba wokufakwa kwentambo  ulokhu ushintsha. Nakhu okusemkhathizwe:

l Ukusebenza kahle kokuvala  kuba ngcono. Sithola izindlela zokwenza ukuxhumana okuqine kakhulu ngaphandle kokudinga ama-gaskets engeziwe  noma ama-O-rings.

l Izinto ezisetshenziswayo  ziyathuthuka, futhi. Lokhu kusho ukuthi ukufakwa kungamelana nengcindezi eyengeziwe futhi kuhlale isikhathi eside.

l Ochwepheshe basikisela ukuthi uhlale ulandela izincomo zomkhakha , njengokusebenzisa i-ANSI/ASME B1.20.1  ye-NPT noma i-ISO 7  ye-BSPT, ukuze wenze isiqiniseko sokuthi yonke into ilingana kahle.