Decoding Thread Fittings: NPSM, NPTF, NPT, le BSPT E hlalositsoe

A na u tšoenngoa ke ho se utloisise likhoele tsa NPSM, NPTF, NPT, le BSPT? Sengoliloeng sena se tla u tataisa ho utloisisa ka botlalo likhoele tsena, 'me se u rute mokhoa oa ho li kenya hammoho le lintlha tsa bohlokoa.

Tlhahlobo e Feletseng ea Mefuta ea Khoele

Likhoele tsa NPT (National Pipe Taper).

Tlhaloso, Litšobotsi, le Metheo ea Moqapi

NPT e emetse National Pipe Tapered . Ke mofuta oa khoele e tapered  e sebelisetsoang ho kopanya lipeipi le li-fittings. Mona ke seo u hlokang ho se tseba:

l Likhoele Tse Tapered : Likhoele tsa NPT li taper ka sekhahla sa 1/16 inch ka inch, ho bolelang hore li ntse li fokotseha ho ea qetellong.

l Litekanyetso tsa Khoele : Li latela maemo a ANSI/ASME B1.20.1  .

l Tlhale Angle : Likhoele li na le 60° flank angle.

l Bokhoni ba ho Tiisa : Ba theha tiiso ea mochini  ka ho kena lipakeng  pakeng tsa likhoele  le metso..

Likopo ho Litsamaiso tsa Liphaephe le Tšebeliso ea Indasteri

Likhoele tsa NPT li hohle lits'ebetsong tsa khatello . Li sebelisetsoa ho etsa bonnete ba hore ha ho na ho lutla tiiso  ho:

l Phetisetso ea Mokelikeli le Khase : Liphaephe tse tsamaisang metsi, oli kapa khase.

l Lits'ebetso tsa Khatello ea Khatello : Lisebelisoa tse lekanyang khatello.

Liindasteri tse sebelisang likhoele tsa NPT li kenyelletsa:

l Ho hlahisa

l Likoloi

l Sefofane

Malebela a Tlhophiso, Mekhoa e Molemo ka ho Fetisisa, le Tšebeliso e Tloaelehileng

Ha o kenya likhoele tsa NPT, latela mekhoa ena e metle:

1. Sebelisa PTFE Tape : Koahela tepi ea PTFE  (Teflon) ho pota khoele ea banna ho ntlafatsa tiiso.

2. U se ke Ua Hatella ho Feta : Ho tiisa ho feta tekano ho ka baka galling , moo likhoele li senyehang.

3. Hlahloba ho Dutla ha ho dutla : Lekola khokahano ka mehla bakeng sa ho dutla.

Lisebelisoa tse tloaelehileng li kenyelletsa:

l Liphaephe tse hokelang : Joalo ka lipeipi tsa lehae la hau.

l Fittings : Joalo ka likhahla kapa li-tee tse thusang ho fetola tsela ea phallo.

Melemo, Meeli, le Liphapang ho tsoa ho NPTF

Melemo:

l Khokahano ea Mahala : Li etselitsoe ho theha tiiso e tiileng.

l E Amoheloa Haholo : NPT ke tekanyetso liindastering tse ngata.

Meeli:

l Kotsi ea ho tiisa ho Feta : Hoa khoneha ho senya likhoele.

l E kanna ea Hloka Sealant : Ka linako tse ling, ho hlokahala sealant e eketsehileng ho netefatsa tiiso e sa luleng.

Phapang ho NPTF:

l NPTF , kapa National Pipe Taper Fuel , e tsejoang hape e le Dryseal American National Standard Taper Pipe Thread , e etselitsoe ho fana ka tiiso e tiileng ntle le tlhokahalo ea sealant e eketsehileng.

l likhoele tsa NPTF  li na le moralo o fapaneng hanyane o lumellang khokahano ea mochini  ntle le ts'ebeliso ea theipi ea PTFE  kapa li-sealants tse ling, ho fapana le likhoele tsa NPT tseo hangata li li hlokang.

Hopola, NPT e mabapi le ho theha khoele ea khoele ea peipi e tapered  e tšepahalang le e sebelisoang haholo. Hore na o sebetsa koloing kapa o lokisa ho dutla lapeng, ho tseba ka likhoele tsa NPT ho o thusa ho etsa likhokahano tse betere.

 

NPTF (National Pipe Taper Fuel) Likhoele

Kakaretso ea NPTF Thread Standards le Design

Likhoele tsa NPTF, tse tsejoang hape e le Dryseal American National Standard Taper Pipe Thread , li latela litekanyetso tsa ANSI B1.20.3  . Likhoele tsena li tšoana le NPT empa li etselitsoe tiiso e betere. Likhoele tsa NPTF li na le 60 ° flank angle  'me li etsa tiiso ea mochine  ka ho kena-kenana  pakeng tsa likhoele le metso. Sena se bolela hore likhoele li pshatleha hammoho ho etsa tiiso e tiileng ntle le ho hloka li-sealant tse eketsehileng.

Phapang lipakeng tsa NPT le NPTF

Le hoja likhoele tsa NPT le NPTF li shebahala li tšoana, meralo ea tsona e fapane . Likhoele tsa NPT li entsoe tlas'a ANSI/ASME B1.20.1 , 'me li ka hloka teipi ea PTFE  kapa li-sealant tse ling ho netefatsa hore ho na le khokahanyo e sa lutleng . Ka lehlakoreng le leng, likhoele tsa NPTF, tse latelang ANSI B1.20.3 , li entsoe ho tiisa le ho etsa tiiso ntle le lisebelisoa tse eketsehileng. Ba fihlela sena ka moralo o lumellang likhoele  le metso  hore li kopane, ho theha tiiso e sa luleng..

Likopo ho Mafura le Khase, Ho Fumana Litiiso tse sa Dutlang

Lefats'eng la mafura le khase , likhoele tsa NPTF ke khetho ea mantlha. Li etselitsoe ho etsa tiiso e se nang ho lutla  e bohlokoa haholo lits'ebetsong tsa khatello . Lisebelisoa tsena ha li khone ho lutla, kaha le e nyane e ka ba kotsi. Likhoele tsa NPTF li sebelisoa mekhoeng ea ho lekanya khatello  le likarolo moo ho boloka bohloeki le botšepehi ba mokelikeli kapa khase ho leng bohlokoa.

Maemo a Tšebeliso, Tšebelisano, le Phapanyetsano le NPT

Hangata likhoele tsa NPTF li fumaneha lits'ebetsong moo tiiso e sa lutleng , 'me ha ho sealant e batloang.  ho hlokahalang Leha ho le joalo, leha likhoele tsa NPTF le NPT ka linako tse ling li ka tsoakoa, sena ha se kamehla se bolokehileng kapa se sebetsang. Likhoele tsa NPTF li ka kengoa ho li-fittings tsa NPT, empa tse ka morao li kanna tsa se tiisehe hantle hobane NPTF e etselitsoe ho lekana haufinyana. Ho bohlokoa ho lekola tšebelisano pele u li kopanya ho qoba mathata a kang ho lla  kapa ho tiisa ka nepo.

Likhoele tsa NPSM (National Pipe Straight Mechanical).

Tlhaloso, Litšobotsi, le Metheo ea Likhoele tsa NPSM

Likhoele tsa NPSM ke mofuta oa likhoele tse otlolohileng tsa liphaephe . Ba latela litekanyetso tsa ANSI/ASME B1.20.1  . Likhoele tsena li etselitsoe khokahano ea mochini  ho fapana le ho etsa tiiso. Li na le 60 ° flank angle  'me li reretsoe ho sebelisoa ka gasket  kapa O-ring  ho theha khokahanyo e sa lutleng..

Lintlha tsa bohlokoa  mabapi le likhoele tsa NPSM: - Li tšoana , ho bolelang hore bophara bo lumellana. - Likhoele tsa NPSM ha li thekesele joalo ka likhoele tsa NPT  (National Pipe Tapered). - Li sebelisetsoa ho etsa likhokahano tsa mochini . - Ts'ebetso ea ho tiisa  e tsoa ho li-gaskets, eseng likhoele ka botsona.

Likopo ho Hydraulic Systems le Maemo a Tšebeliso e Ntle

Likhoele tsa NPSM hangata li fumaneha lits'ebetsong tsa hydraulic  moo tiiso e sa luleng  e leng bohlokoa. Li sebetsa hantle lits'ebetsong tsa khatello  joalo ka litsamaiso tsa ho lekanya khatello . Li -fittings tsa Female Pipe Swivel  li tloaelehile ka likhoele tsa NPSM, tse lumellang ho kenngoa habonolo libakeng tse thata.

Linyeoe tse loketseng tsa ts'ebeliso  li kenyelletsa: - Moo tiiso ea mochini  e leng bohlokoa ho feta tiiso ea khoele. - Sistimi e hlokang ho qhaqhoa khafetsa le ho kopanngoa hape. - Ha o sebelisa gasket  kapa O-ring  e khethoa ho feta sealant ea khoele.

Papiso le Mefuta e meng ea likhoele, Ho fapanyetsana le NPTF

Ka linako tse ling NPSM e ka ferekanngoa le NPTF  (National Pipe Taper Fuel), e tsejoang hape e le Dryseal American National Standard Taper Pipe Thread . Mona ke kamoo ba bapisang kateng:

l Likhoele tsa NPTF  li etselitsoe ho fana ka tiiso e sa lutleng  ntle le tlhoko ea li-sealant tse ling. Ba etsa hore ho be le tšitiso e lekaneng  pakeng tsa likhoele tsa khoele  le metso ea khoele.

l NPSM li hloka  Likhoele tsa gasket  kapa O-ring  ho netefatsa khokahano e sa luleng.

NPSM ha e fetohe le NPTF  kapa NPT  ka lebaka la maemo a fapaneng a likhoele.

Ho Tiisa Katleho le Likopo tsa Indasteri

Likhoele tsa NPSM li nkoa e le tsa bohlokoa bakeng sa katleho ea tsona ea ho tiisa  ha li sebelisoa ka tiiso e nepahetseng ea mochini . Li sebelisoa haholo ho: - Likopo tsa phetisetso ea metsi le khase  . - Liindasteri tse hlokang khokahano e tšepahalang ea mochini.

Lisebelisoa tsa indasteri  li kenyelletsa: - Ho hloekisa metsi le metsi a litšila. - Sisteme ea moea. - Sistimi ea ho tlotsa.

BSPT (British Standard Pipe Taper) Likhoele

Kenyelletso ea BSPT Thread Standards

Ha re bua ka likhoele tsa BSPT , re ikakhela ka setotsoana lefatšeng la liphaephe le likhokahano tse bohlokoa bakeng sa phetiso ea mokelikeli le khase . BSPT e emetse British Standard Pipe Taper . Ke mofuta oa khoele e tapered  e sebelisetsoang ho etsa tiiso e sa lutleng . Tekanyetso ena e hlalositsoe litokomaneng tse kang BS 21  le ISO 7.

Likarolo tse Ikhethang le Papiso le NPT le NPTF

Likhoele tsa BSPT li ikhethile. Li na le angle ea flank ea 60 °  'me li fokotsehile, ho bolelang hore li ntse li fokotseha ha li ntse li teba. Sena se fapane le likhoele tsa NPT , tseo le tsona li tapered empa li na le 60 ° thread angle e sebelisoang Amerika, joalokaha e hlalosoa ke ANSI/ASME B1.20.1.

Joale, ha re bapiseng BSPT le NPTF . NPTF, kapa National Pipe Taper Fuel , eo hangata e bitsoang Dryseal American National Standard Taper Pipe Thread , ho ea ka ANSI B1.20.3 , e etselitsoe tiiso e thata ho feta NPT. E finyella sena ka ho etsa hore ho be le tšitiso e lekaneng  pakeng tsa likhoele tsa khoele  le metso ea khoele . BSPT ha e itšetlehe ka sena bakeng sa ho tiisa. Sebakeng seo, e kanna ea hloka sekoaelo sa likhoele  joalo ka tepi ea PTFE (Teflon)  kapa gasket  ho thibela ho lutla.

BSPT ho Likopo tsa Machabeng le tsa Lefatše

Likhoele tsa BSPT li sebelisoa haholo kantle ho United States, haholo-holo linaheng tse latelang maemo a boenjiniere a Borithane. Hangata li bonoa mekhoeng ea khatello  le mekhoa ea ho lekanya khatello . Bokhoni ba bona ba ho theha tiiso ea mochini  e etsa hore e tšoanelehe bakeng sa lits'ebetso tse ngata tsa machabeng.

Tlhahlobo ea Papiso le Mefuta e meng ea Khoele

Ha re sheba BSPT hammoho le mefuta e meng ea likhoele tse kang NPSM (National Pipe Straight Mechanical)  le BSPP (British Standard Parallel Pipe) , rea bona hore BSPT ke ea ho theha khokahanyo e sa lutlang  ka likhoele tse tapered, athe NPSM le BSPP ke tsa likhoele tse otlolohileng tsa pipe . Likhoele tsa BSPT li etsa khokahano ea mochini  ntle le ho hloka ring seal  kapa O-ring , ho fapana le BSPP e ka hlokang tsena bakeng sa ho tiisa.

 

Likhoele tsa BSPT li ntle bakeng sa maemo ao ho ona o hlokang tiiso e tiileng, e sa luleng  ntle le ho rarahana ha mekhoa e meng ea ho tiisa. Li bonolo ho li sebelisa ho feta likhoele tsa NPTF , tse hlokang khatello e nepahetseng hantle  ho qoba mathata a kang ho lla  kapa ho senya ka lebaka la ho tiea ho feta tekano.

Litlhaloso tsa Setsebi le Maemo

Litekanyo tse Tloaelehileng, Lipalo tsa Khoele, le Maemo a ANSI

Ha re bua ka lisebelisoa tsa likhoele  tse kang NPSM, NPTF, NPT, le BSPT, tsohle li mabapi le hore na li hokahanya joang le ho tiisa liphaephe. tsena tsa likhoele Litekanyetso  li re thusa ho etsa bonnete ba hore lintho li lumellana hantle. Nahana joalo ka li-blocks tsa LEGO - li hloka ho ts'oana hantle hore li khomarele.

NPSM NPS  le li  na le likhoele tse otlolohileng, ho bolelang hore ha li tiee ha li ntse li kenella.

l NPT , NPTF , le BSPT  li teiloe. Sena se bolela hore li tla tiea, joalo ka funele, e thusang ho emisa ho lutla.

American National Standards Institute (ANSI)  e beha melao bakeng sa likhoele tsena US Mohlala, ANSI/ASME B1.20.1  ke ea likhoele tsa NPT. Ba re bolella hore na likhoele li lokela ho ba kholo hakae, hore na li kae ka inch (ke palo ea likhoele), le sebōpeho seo li lokelang ho ba le tsona.

Thepa, Maemo a Tlhahiso, le Tumellano

Lisebelisoa li bohlokoa haholo. Lisebelisoa tse ngata ke tšepe, joalo ka tšepe kapa koporo, hobane li matla. Ho etsoa ha likarolo tsena ho latela melao e thata ho netefatsa hore li bolokehile ebile li tla tšoarella nako e telele. Sena se mabapi le ho latela melao  - joalo ka ho latela risepe ea ho baka kuku e phethahetseng nako le nako.

l ANSI B1.20.3  le AS 1722.1  ke tse ling tsa litekanyetso tse tataisang mokhoa oa ho etsa likhoele bakeng sa litsamaiso tsa khatello..

l UK, ba sebelisa BS 21  le ISO 7  bakeng sa likhoele tsa BSPT  le BSPP  .

Baetsi ba boetse ba tlameha ho etsa bonnete ba hore likhoele tsa bona li khona ho sebetsana le khatello eo ba lokelang ho e etsa ntle le ho lutla kapa ho robeha. Ke hona moo netefatso ya boleng  e kenang teng.

Ho Utloisisa Litekanyo tsa Khoele, Mamello, le Tiisetso ea Boleng

Litekanyo tsa likhoele li kenyelletsa sekontiri se phahameng  (hore na likhoele li arohane hakae) le angle  ea likhoele. Ka mohlala, likhoele tsa BSPT li na le 60 ° flank angle , e leng karolo ea tse etsang hore li ikhetha.

l Mamello  ke liphapang tse nyane tse lumelletsoeng ka boholo le sebopeho sa likhoele. Li tšoana le kamore ea ho sotha ka likotoana tse lekanang hammoho.

l Tiisetso ea boleng  e bolela ho hlahloba karolo e 'ngoe le e 'ngoe ho netefatsa hore e finyella litekanyetso. Ho tšoana le tichere e hlophisang mosebetsi oa hao oa sekolo ho etsa bonnete ba hore u fumane likarabo tse nepahetseng.

Bakeng sa tiiso e sa lutleng , likarolo tse kang PTFE tape (Teflon) , gaskets , kapa O-rings  li ka sebelisoa le likhoele tsena. Likhoele tse tapered  joalo ka NPT  le BSPT  hangata li ka itihela ka botsona ka lebaka la sebopeho sa tsona - li ntse li tiea le ho feta ha li ntse li phunyeletsoa.

Lintlha tse Potlakileng:

l Likhoele tsa NPT  li etselitsoe ho lekana tšitiso , ho bolelang hore li etsa tiiso ea mochini  ka ho petetsa hammoho.

l Likhoele tsa NPSM  li sebetsa le phala ea basali e pota-potileng  - mofuta oa linate tse u lumellang hore u li phunye ntle le ho sotha phala eohle.

l likhoele tsa NPTF  ka linako tse ling li bitsoa Dryseal American National Standard Taper Pipe Thread  hobane li reretsoe ho tiisa ntle le ho hloka lintho tse ling tse kang tepi kapa peista.

Likopo Tse Sebetsang le Tlhahlobo e Bapisang

Likopo tsa 'Nete tsa Lefatše le Lithuto tsa Litaba tsa Mefuta e sa Tšoaneng ea Khoele

Ha ho tluoa tabeng ea ho kenya likhoele  tse sebelisoang lits'ebetsong tsa khatello , lintlha li bohlokoa. A re shebeng hore na likhoele tsena li sebelisoa joang lefatšeng la sebele.

Hangata likhoele tsa NPT  li fumaneha lits'ebetsong tse akaretsang tsa indasteri. Ka mohlala, moetsi oa lisebelisoa tsa ho lekanya khatello  a ka sebelisa lisebelisoa tsa NPT ka lebaka la ho lumellana ha tsona le mefuta e mengata ea lisebelisoa.

Likhoele tsa NPTF , tse tsejoang hape e le Dryseal American National Standard Taper Pipe Thread , li etselitsoe tiiso e sireletsehileng haholoanyane, e sa lutleng ntle le tlhoko ea sealant e eketsehileng ea khoele . Li sebelisoa lits'ebetsong moo tiiso ea mochini  e leng bohlokoa, joalo ka lisebelisoa tse tsamaisang mafura.

Likhoele tsa NPSM , kapa National Pipe Straight Mechanical , hangata li sebelisoa ka swivel ea phala ea basali . Thuto ea mohlala e ka 'na ea kenyelletsa tsamaiso ea hydraulic moo lisebelisoa tsa NPSM li lumellang hore ho be bonolo ho kopanya le ho hlokomela.

Likhoele tsa BSPT , tse nang le 60 ° flank angle , li tloaelehile lits'ebetsong tsa machaba. Hangata li khethoa bakeng sa ts'ebetso ea tsona ea ho tiisa  lits'ebetsong tsa phetisetso ea mokelikeli le khase.

Tlhahlobo ea Papiso: NPT vs. NPTF, NPSM vs. NPT, Boemo bo Ikhethang ba BSPT

Ha re arole liphapang:

l NPT vs. NPTF : Ka bobeli li na le khoele ea phaephe e tapered , empa NPTF e fana ka ho kena-kenana le ho kena-kenana  pakeng tsa likhoele tsa khoele  le metso ea khoele , ho felisa tlhoko ea sealant.

l NPSM vs. NPT : NPSM e na le likhoele tse otlolohileng tsa liphaephe  'me e hloka gasket kapa O-ring ho theha khokahanyo e sa lutleng . Likhoele tse tapered tsa NPT li etsa tiiso ka likhoele ka botsona.

l Boemo bo Ikhethang ba BSPT : Likhoele tsa BSPT li tšoana le NPT empa li na le khoele e fapaneng  le molumo , e leng se etsang hore li se ke tsa feto-fetoha le li-fittings tsa NPT.

Litlhaloso tsa Setsebi le Keletso ea Litsebi tsa Indasteri mabapi le Fittings ea Khoele

Litsebi tsa indasteri li fana ka maikutlo a ho sebelisa tepi ea PTFE (Teflon)  kapa reng e tlamahaneng  e nang le li-fittings tsa NPT ho netefatsa tiiso e sa lutleng . Bakeng sa NPTF, ho bohlokoa ho netefatsa boitlamo bo nepahetseng ho nka monyetla oa ts'ebetso ea eona ea dryseal  .

Ha o sebetsa le likhokahano tsa BSPT , hopola hore ha li tsamaisane le NPT kapa NPTF ntle le li-adapter. Litsebi li eletsa ho hlahloba litekanyetso tsa likhoele  tse kang ANSI/ASME B1.20.1  bakeng sa NPT, ANSI B1.20.3  bakeng sa NPTF, kapa ISO 7  le BS 21  bakeng sa BSPT ho netefatsa hore ho loketse.

Galling , kapa tšenyo ea khoele, ke kotsi ka lisebelisoa tsena. E le ho e thibela, le ka mohla u se ke ua fetelletsa 'me u latele litlhaloso tsa tsamaiso ea khatello .

Tlhophiso, Tlhokomelo, le Mekhoa e Molemo ka ho Fetisisa

Mekhoa e Molemo ka ho Fetisisa ea ho Kenya Mefuta e sa Tšoaneng ea Khoele

Ha o kenya NPSM , NPTF , NPT , kapa li-fittings tsa BSPT  , ho bohlokoa ho latela litataiso tse khethehileng ho netefatsa hore ho na le khokahanyo e sa lutleng . Tataiso e potlakileng ke ena:

NPT ​ le NPTF :

l Kenya theipi ea PTFE  kapa sealant se loketseng  khoeleng ea banna.

l Toeba ho kenya letsoho ka letsoho, ebe u sebelisa wrench bakeng sa ho fetoha ha ho qetela.

l E-ba hlokolosi hore u se ke ua tiisa ho feta tekano, kaha sena se ka senya likhoele.

l BSPT :

l Ho tšoana le NPT, sebelisa theipi ea PTFE  kapa sealant sealant.

l Tiisa ka hloko ho fihlela tiiso ea mochini.

NPSM ​:

l Likhoele tsena li etselitsoe ho kopana le phaephe ea basali.

l Sebelisa gasket  kapa O-ring  bakeng sa ho tiisa.

l U se ke ua hatella haholo, kaha ho ka baka tšenyo ho gasket.

Mathata a Tloaelehileng ho Kenyeng le Mokhoa oa ho a Hlōla

l Cross-threading : E etsahala ha likhoele li sa tsamaisane. Kamehla qala ka letsoho ho thibela.

l Galling : Ho kopana le tšepe le tšepe ho ka baka sena. Sebelisa lubrication ho e qoba.

l Ho tiisa ho feta tekano : Ho ka lebisa tšenyo ea khoele. Latela litaelo tsa tsamaiso ea khatello ea khatello  bakeng sa torque e nepahetseng.

l Leakage : Haeba ho lutla ho hlaha, hlahloba hore na ha ho pota-potile 'me u netefatse hore  hantle khoele e sebetsa .

Tlhokomelo, Tharollo ea Mathata, le Ho netefatsa Bophelo bo Bolelele ba Li-Fittings tsa Khoele

l Tlhahlobo ea Kamehla : Sheba matšoao a ho khathala, ho bola, kapa ho senyeha.

l Ho hloekisa : Boloka likhoele li hloekile. Ditshila di ka baka ho dutla.

l Ho sebelisoa hape ha Sealant : Ha nako e ntse e ea, li-sealants li ka nyenyefatsa. Etsa kopo hape ha ho hlokahala.

l Polokelo e Nepahetseng : Boloka lisebelisoa tse ling sebakeng se omileng, se hloekileng.

Hopola :

l likhoele  tsa NPT  le NPTF  li theha tiiso ka ho kena-kenana  pakeng tsa likhoele  le metso..

l Likhoele tsa  BSPT  li tiisa ka likhoele feela, ka 60° flank angle  e thusa ho tiisa hantle.

l Likhoele tsa  NPSM  li itšetlehile ka ho hokahanya ha mochine , hangata ho ntlafatsoa ka gasket  kapa O-ring.

Lipotso ka ho Fittings Thread

Phapang ea Sehloho lipakeng tsa NPSM, NPTF, NPT, le BSPT Threads

Ha ho tluoa tabeng ea ho kenya likhoele , ho tšoana le papali. Karolo ka 'ngoe e lumellana ka tsela e itseng. Likhoele tsa NPSM  (National Pipe Straight Mechanical) li otlolohile ebile li etselitsoe manonyeletso a mochini a sa sebetseng mahala. Likhoele NPT  National Pipe Tapered) li koetsoe 'me li etsa tiiso e thata ka ho kenella ka botebo ha li ntse li phunyeletsoa  ( tsa . Ka lehlakoreng le leng, likhoele tsa BSPT  (British Standard Pipe Taper) li sebelisetsoa ho etsa litiiso tse thata tsamaisong ea khatello 'me li na le 55 ° flank angle, e fapaneng le 60 ° e sebelisoang likhoeleng tsa NPT.

Ho Fetolana, Lihokelo tse sa Lutleng, le Liphoso Tse Tloaelehileng

Jwale, na o ka di kopanya? E seng joalo hantle. Ho fapanyetsana  ha se papali eo u batlang ho e bapala ka likhoele tsa likhoele. Ho sebelisa NPT  le NPTF  ka linako tse ling ho ka sebetsa, empa ha ho netefatsoe hore ho tla ba le khokahanyo e sa lutleng . Le BSPT ? Ke pale e fapaneng ka ho felletseng ka lebaka la khoele ea eona e ikhethang le molumo oa eona. Phoso e atileng haholo? Ho nahanoa hore kaofela lia kopana. Kamehla hlahloba maemo, joalo ka ANSI/ASME B1.20.1  bakeng sa NPT, ho qoba ho lutla kapa tšenyo.

Ho Khetheha Mofuta oa Khoele e Nepahetseng bakeng sa Likopo tse Khethehileng

Joale, u ka khetha e nepahetseng joang? Nahana ka mosebetsi. Bakeng sa phetiso ea mokelikeli le khase , tiiso e sa lutleng  ke senotlolo. Haeba o sebetsa le litsamaiso tsa khatello ea , BSPT  e kanna ea ba tsela ea ho tsamaea. Bakeng sa lits'ebetso tse hlokang tiiso ea mochini  ntle le sealant, NPTF  ke motsoalle oa hau. Mme bakeng sa khokahano ea mochini  e ka aroloang habonolo, NPSM  e ka ba khetho e ntle ka ho fetisisa.

Lipotso Tse Ling Tse Ling Tse Ahlahisang le Matšoenyeho a Sebetsang

l Sekoahelo se setle ke eng? 

Theipi ea PTFE  (Teflon) hangata e sebelisoa le likhoele tsa NPT ho thusa ho tiisa.

Ke lokela ho li phunya ka thata hakae? 

E-ea bakeng sa ho kena-kenana le tšitiso - e tiileng ka ho lekaneng e le hore likhoele li tobane  le metso  , empa eseng ho tiisa hoo u hlobolang likhoele.

Ho thoe'ng ka li-angles? 

Hopola, NPT  le NPTF  li na le angle ea 60 ° flank , 'me BSPT  e na le 55 ° angle..

A na nka sebelisa lisebelisoa tsee hape?

 Ka linako tse ling, empa u hlokomele ho lla —ha likhoele li fela ’me li khomarelana.

l Ho thoe'ng haeba e lutla?

 Sheba hore na ha ho na tšenyo kapa u leke ho tiisa lesale  kapa O-ring  bakeng sa tšireletso e eketsehileng.

Hopola, ho fumana se nepahetseng ho tšoana le ho khetha sesebelisoa se nepahetseng bakeng sa mosebetsi. Tsohle li mabapi le lintlha. Hopola malebela ana, 'me u tla be u le tseleng ea ho tseba li-fittings  bakeng sa likhokahano tse sa lutleng..

Qetello

Ha re bua ka lisebelisoa tsa likhoele  tse kang NPSM , NPTF , NPT , 'me BSPT , re bua ka likarolo tse re thusang ho kopanya liphaephe le liphaephe hammoho. Lisebelisoa tsena li etsa bonnete ba hore metsi, khase le lintho tse ling li tsamaea liphaepheng ntle le ho lutla. Mona ke seo re ithutileng sona:

l NPT  ke mofuta oa khoele e tapered  e sebelisoang haholo USA. E tiisa hobane likhoele li ntse li fokola ka lehlakoreng le leng, joalo ka khoune.

l NPTF , e tsejoang hape e le Dryseal American National Standard Taper Pipe Thread , e tšoana le NPT empa e etselitsoe ho etsa tiiso e thata le ho feta e sa  lutleng ntle le ho hloka lintho tse ling tse kang tepi ea PTFE..

l NPSM , kapa National Pipe Straight Mechanical , e na le likhoele tse otlolohileng tsa liphaephe . E ntle bakeng sa ho etsa khokahano ea mochini  e ka arohang le ho e kopanya habonolo.

l BSPT , e khutšoanyane bakeng sa British Standard Pipe Taper , e tšoana le NPT empa e na le khoele e fapaneng ea khoele  le molumo . E tloaelehile libakeng tse sebelisang litekanyetso tsa Borithane.

Hopola, ho fumana se nepahetseng ho bolela ho tseba litekanyetso tsa khoele ea hau  le ho khetha mofuta o nepahetseng bakeng sa litsamaiso tsa hau tsa khatello.

Mekhoa ea Bokamoso ho Theknoloji e Loketseng Khoele le Likhothaletso tsa Indasteri

Lefatše la likhoele tsa likhoele  le ntse le fetoha. Mona ke seo se leng teng:

l Bokhoni ba ho tiisa  bo ntse bo ntlafala. Re ntse re fumana mekhoa ea ho etsa likhokahano tse thata haholo ntle le ho hloka li-gaskets tse eketsehileng  kapa li-O-rings.

l Lisebelisuoa  le tsona lia ntlafala. Sena se bolela hore li-fittings li ka sebetsana le khatello e eketsehileng 'me li tšoarella nako e telele.

l Litsebi li fana ka maikutlo a hore kamehla u latele litlhahiso tsa indasteri , joaloka ho sebelisa ANSI/ASME B1.20.1  bakeng sa NPT kapa ISO 7  bakeng sa BSPT, ho etsa bonnete ba hore ntho e 'ngoe le e' ngoe e lumellana hantle.