Decoding Thread Fittings: NPSM, NPTF, NPT, ani BSPT Ɲɛfɔli kɛra

Yala aw bɛ gɛlɛya sɔrɔ NPSM, NPTF, NPT, ani BSPT jiriw faamuyabaliya la wa? Nin barokun in bɛna aw bilasira nin dilan ninnu faamuyali caman na, ani k’aw kalan u sigicogo la ka fara jateminɛ nafamaw kan.

Sɛgɛsɛgɛli caman kɛli jiri suguyaw kan

NPT (National Pipe Taper) Filɛriw

Ɲɛfɔli, jogo ani dilancogo jɔnjɔnw

NPT kɔrɔ ye ko National Pipe Tapered . O ye suguya dɔ ye jiri  min bɛ kɛ ka pibilikiw ni fɛnw fara ɲɔgɔn kan. Aw ka kan ka min dɔn, o filɛ nin ye:

l Filɛriw : NPT jiriw bɛ sɔgɔsɔgɔ ni santimɛtɛrɛ 1/16 ye santimɛtɛrɛ kelen na, o kɔrɔ ye k’u bɛ dɔgɔya ka taa a laban fan fɛ.

l Thread Standards : U bɛ tugu ANSI/ASME B1.20.1  sariya la.

l Filɛriw kɛrɛ : Filɛw bɛ kɛ ni 60° ye.

l Dadoncogo ɲuman : U bɛ sigilan masin dɔ dilan  ni dankarili ye min bɛ kɛ  cɛ jiribolow  ni jiribolow .

Baarakɛcogo minnu bɛ kɛ Piping Systems ani Industry Use la

NPT jiriw bɛ yɔrɔ bɛɛ degun siratigɛ la . U bɛ kɛ walasa ka sigilan dɔ sɔrɔ min tɛ bɔgɔ bɔ  :

l Ji ni gazi tali : Pipe minnu bɛ ji, tulu walima gazi ta.

l Tansiyɔn jateminɛcogo : Minɛn minnu bɛ tansiyɔn suman.

Industri minnu bɛ baara kɛ ni NPT jiriw ye, olu dɔw ye:

l Fɛn dilanni

l Mobiliko

l Aerospace (Aerospace) la

Ladilikanw sigicogo, a kɛcogo ɲumanw ani baarakɛcogo minnu bɛ kɛ tuma caman na

Ni aw bɛ NPT jiriw sigi sen kan, aw bɛ nin fɛɛrɛ ɲumanw labato:

1. Aw bɛ PTFE kaseti kɛ : Aw bɛ PTFE kaseti  (Teflon) siri cɛya jiri la walasa ka a sigicogo ɲɛ.

2. Aw kana a siri kojugu : Ni aw ye a siri kojugu, o bɛ se ka kɛ sababu ye ka galling , o yɔrɔ la, jiriw bɛ tiɲɛ.

3. Aw bɛ a lajɛ ni bɔgɔ tɛ : Aw bɛ ɲɔgɔndan sɛgɛsɛgɛ tuma bɛɛ ni bɔgɔ tɛ a la.

Baarakɛcogo minnu ka teli ka kɛ, olu ye:

l Pipuw sirili : I n’a fɔ aw ka so pɔnpe la.

l Fitiniw : I n’a fɔ kɔkiliw walima senw minnu bɛ dɛmɛ ka jibɔ sira Changer.

Nafa, dantigɛli ani danfara minnu bɛ NPTF ni ɲɔgɔn cɛ

Nafa minnu bɛ a la:

l Jɛɲɔgɔnya min tɛ bɔgɔ bɔ : U dabɔra walasa ka sigilan sirilen dɔ dilan.

l A bɛ sɔn a ma kosɛbɛ : NPT ye sariya ye izini caman na.

Danyɔrɔw:

l Farati min bɛ a siri kojugu : A bɛ se ka kɛ ka jiriw tiɲɛ.

l A bɛ se ka kɛ ko a bɛ se ka sigilan wajibiya : Tuma dɔw la, sigilan wɛrɛ ka kan ka kɛ walasa ka sigilan sɔrɔ min tɛ ji bɔ.

Danfara minnu bɛ NPTF ni ɲɔgɔn cɛ:

l NPTF , walima National Pipe Taper Fuel , n’a bɛ fɔ fana ko Dryseal American National Standard Taper Pipe Thread , o dabɔra walasa ka sigilan siri ka ɲɛ, k’a sɔrɔ a ma kɛ ni sigilan wɛrɛ ye.

l NPTF jiriw  dilanni tɛ kelen ye dɔɔnin min b’a to masin bɛ se ka don ɲɔgɔn na  k’a sɔrɔ PTFE kase  walima sigilan wɛrɛw ma kɛ, a tɛ i n’a fɔ NPT jiriw minnu ka teli k’u wajibiya.

Aw k’aw hakili to a la ko NPT ye ka dilan pipe thread connection tapered  min bɛ se ka da a kan ani min bɛ baara kɛ ni a ye kosɛbɛ. I mana baara kɛ mobili kan walima ka jibɔyɔrɔ dɔ labɛn so kɔnɔ, NPT jiriw dɔnni b’i dɛmɛ ka jɛɲɔgɔnya ɲumanw kɛ.

 

NPTF (Jamana Pipe Taper Fuel) Filɛriw

NPTF ka jirisunw sariyaw ni u dilanni lajɛba

NPTF jiriw, n’a bɛ fɔ fana ko Dryseal American National Standard Taper Pipe Thread , olu bɛ tugu ANSI B1.20.3  sariyaw kɔ. O jiri ninnu ni NPT bɔlen don nka u dabɔra walasa ka sigilan ɲuman sɔrɔ. NPTF jiriw bɛ ni 60° kɛrɛfɛla ye  ani u bɛ masin sigicogo dɔ dilan  ni ɲɔgɔndan fitinin ye  jiribolo dawolo ni jiribolow cɛ. O kɔrɔ ye ko jiriw bɛ mugumugu ɲɔgɔn na walasa ka kɛ sigilan sirilen ye k’a sɔrɔ u mago tɛ sigilan wɛrɛw la.

Danfara minnu bɛ NPT ni NPTF cɛ

Hali ni NPT ni NPTF jiriw bɛ ɲɔgɔn na, u dilanni tɛ kelen ye . NPT jiriw dilannen don ANSI/ASME B1.20.1 kɔnɔ , wa u bɛ se ka mago don PTFE kaseti  walima sigilan wɛrɛw la walasa ka ɲɔgɔndan kɛ min tɛ ji bɔ . Faan wɛrɛ fɛ, NPTF jiriw, minnu bɛ tugu ANSI B1.20.3 kɔ , olu bɛ dilan walasa u ka siri ka ɲɛ ani ka kɛ sigilan ye ni fɛn wɛrɛw tɛ u la. U b’o Sɔrɔ ni dilan ye min b’a To jiribolo-yɔrɔw  ni u juw  bɛ Se ka ɲɔgɔn Dòn ɲɔgɔn na, ka dakun dɔ Dabɔ min tɛ bɔgɔ Bɔ.

Baarakɛcogo minnu bɛ kɛ sɛnɛfɛnw ni gazi la, ka se ka sigilanw sɔrɔ minnu tɛ bɔgɔ bɔ

Diɲɛ kɔnɔ, sɛnɛfɛnw ni gazi , NPTF jiriw ye taa-ka-segin sugandili ye. U dabɔra walasa ka sigilan dɔ dilan min tɛ ji bɔ ,  o min nafa ka bon kosɛbɛ degun siratigɛ la . O sigida ninnu tɛ se ka bɔgɔbɔgɔli sara, bawo hali ni a fitinin bɛ se ka kɛ farati ye. NPTF jiriw bɛ kɛ tansiyɔn jateminɛcogo la  ani yɔrɔw la, ji walima gazi saniya n’a dafalen marali nafa ka bon yɔrɔ minnu na.

Baarakɛcogo misaliw, bɛnkan, ani ɲɔgɔn falen-falen ni NPT ye

NPTF jiriw bɛ sɔrɔ tuma caman na yɔrɔw la, yɔrɔ minnu na sigilan min tɛ ji bɔ,  o nafa ka bon, wa sigilan si man ɲi. Nka, hali ni NPTF ni NPT jiriw bɛ se ka ɲagami tuma dɔw la, o tɛ lakana walima nafa ye tuma bɛɛ. NPTF jiriw bɛ se ka siri NPT fɛnw na, nka a bɛ se ka kɛ ko kɔfɛla tɛ datugu ka ɲɛ bawo NPTF dabɔra walasa ka don ɲɔgɔn na ka surunya. A nafa ka bon kosɛbɛ ka bɛnkanw lajɛ sani aw k’u ɲagami walasa ka aw tanga ko dɔw ma i n’a fɔ galling  walima sigili jugu.

NPSM (National Pipe Straight Mechanical) Filɛriw

NPSM jirisunw ɲɛfɔli, u jogo ani u jɔnjɔnw

NPSM jiriw ye suguya dɔ ye pibiliki jiri tilennen . U bɛ tugu ANSI/ASME B1.20.1  sariyaw kɔ. O jiriw dilannen don walasa ka masinw siri ɲɔgɔn na  sanni ka sigilan kɛ. U kɛrɛfɛla ye 60° ye  , wa u dabɔra ka kɛ ni gazi  walima O-ring ye  walasa ka ɲɔgɔndan dɔ dilan min tɛ bɔgɔ bɔ.

Fɛn kolomaw  NPSM jiriw kan : - U bɛ ɲɔgɔn ta , o kɔrɔ ye ko u cɛmancɛ bɛ bɛn ɲɔgɔn ma. - NPSM jiriw tɛ taper i n’a fɔ NPT  (National Pipe Tapered) jiriw. - u bɛ kɛ ka masinw ka ɲɔgɔndanw kɛ . - Sigini nafama  bɛ bɔ gaziw la, a tɛ bɔ jiriw yɛrɛ la.

Baarakɛcogo minnu bɛ kɛ jilafɛnw na ani baarakɛcogo ɲumanw na

NPSM jiriw bɛ sɔrɔ tuma caman na jiko siratigɛ la,  yɔrɔ minnu na, sigilan min tɛ ji bɔ,  o nafa ka bon kosɛbɛ. u bɛ baara kɛ ka ɲɛ degun siratigɛ la  i n' a fɔ degun jateminɛcogo . Female Pipe Swivel  fittings ka ca ni NPSM jiriw ye, o b’a to u bɛ se ka sigi nɔgɔya la yɔrɔ gɛlɛnw na.

Baarakɛcogo ɲumanw  ye ninnu ye : - Yɔrɔ minnu na masin sigilan  nafa ka bon ka tɛmɛ jiri sigilan kan. - Sisitɛmu minnu ka kan ka to ka u fara ɲɔgɔn kan ani ka u lajɛ kokura. - Ni aw bɛ baara kɛ ni gazi  walima O-ring ye  , o ka fisa ni jiri sirilan ye.

Sanga ni jiri suguya wɛrɛw ye, ɲɔgɔn falen-falen ni NPTF ye

NPSM bɛ se ka ɲagami tuma dɔw la ni NPTF  (National Pipe Taper Fuel) ye, n’a bɛ fɔ fana ko Dryseal American National Standard Taper Pipe Thread . U bɛ ɲɔgɔn sanga cogo min na, o filɛ nin ye:

l NPTF  jiriw dabɔra walasa ka sigilan di min tɛ ji bɔ,  k’a sɔrɔ a ma kɛ ni sigilan wɛrɛw ye. U bɛ danfara dɔ Dabɔ  cɛ jiribolo-yɔrɔw  ni jiribolo-yɔrɔw .

l NPSM  jiriw bɛ gazi  walima O-ring de wajibiya  walasa ka ɲɔgɔndan kɛ min tɛ bɔgɔ bɔ.

l NPSM tɛ se ka ɲɔgɔn falen ni NPTF  walima NPT ye  k’a sababu kɛ jirisunw sariyaw tɛ kelen ye.

Siginidenw ka baarakɛcogo ɲuman ani izini baarakɛcogo

NPSM jiriw nafa ka bon u sigicogo ɲuman na  ni u kɛra ni masinw sigicogo ɲuman ye . U bɛ baara kɛ kosɛbɛ : - Ji ni gazi jiginni  baarakɛcogo la. - Industri minnu mago bɛ masinko ɲɔgɔndan dannamɔgɔ la.

Industriw ka baarakɛcogo dɔw  ye : - Ji ni ji nɔgɔlenw saniya. - Fiɲɛbɔlanw (systemes pneumatiques). - Tumu kɛcogo.

BSPT (British Standard Pipe Taper) Filɛriw

BSPT ka jirisunw ka sariyaw daminɛcogo

n' an bɛ kuma BSPT jiriw kan , an bɛ ka jigin diɲɛ kɔnɔ pibilikiw ni ɲɔgɔndanw na minnu nafa ka bon ji ni gazi jiginni na . BSPT kɔrɔ ye Angilɛw ka Standard Pipe Taper ye . O ye suguya dɔ ye jirimugu  min bɛ kɛ ka sigilan dilan min tɛ bɔgɔ bɔ . O sariya in ɲɛfɔlen don sɛbɛnw kɔnɔ i n’a fɔ BS 21  ani ISO 7.

Fɛn minnu bɛ danfara don u ni ɲɔgɔn cɛ ani u ni NPT ni NPTF bɛ tali kɛ ɲɔgɔn na

BSPT jiriw ye fɛn ye min ɲɔgɔn tɛ yen. U kɔkanna-yɔrɔ ye 60° ye  wa u bɛ Kɛ ‘kɛrɛnkɛrɛnnenya la, o kɔrɔ ye k’u bɛ Dɔgɔya n’u bɛ Taa ‘yɔrɔ la. O ni NPT jiriw tɛ kelen ye , minnu fana bɛ sɔgɔsɔgɔ nka u ka jiribolo 60° bɛ kɛ Ameriki, i n’a fɔ ANSI/ASME B1.20.1 y’a ɲɛfɔ cogo min na.

Sisan, an ka BSPT ni NPTF suma ɲɔgɔn na . NPTF, walima National Pipe Taper Fuel , min bɛ wele tuma caman na ko Dryseal American National Standard Taper Pipe Thread , i n’a fɔ ANSI B1.20.3 b’a fɔ cogo min na , o dabɔra walasa ka sigilan siri ka tɛmɛ NPT kan. a b' o sɔrɔ ni ɲɔgɔndan fitinin dɔ dabɔli ye  cɛ jiribolow  ni jiribolo juw . BSPT tɛ a jigi da nin fitinin in kan sigili kama. O nɔ na, ​​a bɛ se ka kɛ a mago bɛ jiri sirilan na  i n’a fɔ PTFE kase (Teflon)  walima gazi  walasa ka ji bɔli bali.

BSPT min bɛ diɲɛ kɔnɔ ani diɲɛ kɔnɔ baarakɛcogo la

BSPT jiriw bɛ baara kɛ kosɛbɛ Ameriki kɔkan, kɛrɛnkɛrɛnnenya la jamana minnu bɛ tubabukan injiniyɛri sariyaw labato. u bɛ ye tuma caman na degun siratigɛ la  ani degun jateminɛ siraw la . U ka se ka masina sigilan dɔ dilan  , o b’a to u bɛnnen don diɲɛ baara caman ma.

Sɛgɛsɛgɛli min bɛ tali kɛ ɲɔgɔn na ni jiri suguya wɛrɛw ye

N’an ye BSPT lajɛ jiri suguya wɛrɛw kɛrɛfɛ i n’a fɔ NPSM (National Pipe Straight Mechanical)  ani BSPP (British Standard Parallel Pipe) , an b’a ye ko BSPT ye ɲɔgɔndan dɔ dabɔli ye min tɛ bɔgɔ bɔ  jirisunw na, k’a sɔrɔ NPSM ni BSPP ye jirisun tilennenw ye BSPT jiriw bɛ masin jɛɲɔgɔnya kɛ  k’a sɔrɔ u mago tɛ bololanɛgɛ sirilen  walima O-ring , a tɛ i n’a fɔ BSPP min bɛ se ka mago don ninnu na sigili kama.

 

BSPT jiriw ka ɲi kosɛbɛ ko minnu na, aw mago bɛ sigilan gɛlɛn na, min tɛ bɔgɔ bɔ,  k’a sɔrɔ sigilan wɛrɛw ka gɛlɛya tɛ. U baara ka nɔgɔn ka tɛmɛ NPTF jiriw kan , minnu bɛ degun jateminɛ tigitigi de wajibiya  walasa ka ko dɔw bali i n’a fɔ galling  walima tiɲɛni ka bɔ u sirili kojugu fɛ.

Fɛɛrɛko ɲɛfɔli ni sariyaw

Sumanikɛlanw, jiri jatew, ani ANSI sariyaw

N’an bɛ kuma jirisunw sigicogo kan  i n’a fɔ NPSM, NPTF, NPT, ani BSPT, o bɛɛ bɛ kɛ u bɛ pibilikiw siri ɲɔgɔn na ani k’u datugu cogo min na. Nin dilan sariyaw  b’an dɛmɛ walasa fɛnw bɛ bɛn ɲɔgɔn ma ka ɲɛ. Aw ye miiri a la i n’a fɔ LEGO blokiw – u ka kan ka bɛn ɲɔgɔn ma cogo dafalen na walasa ka nɔrɔ ɲɔgɔn na.

l NPSM  ni NPS  bɛ ni jiri tilennenw ye, o kɔrɔ ye k’u tɛ gɛlɛya ka taa a fɛ ni u bɛ sɔgɔsɔgɔ.

l NPT , NPTF , ani BSPT  bɛ kɛ ka surunya. O kɔrɔ ye k’u bɛ gɛlɛya tiɲɛ na, i n’a fɔ funteni, o bɛ dɛmɛ ka ji bɔli dabila.

Ameriki jamana ka sariyasunba (ANSI)  bɛ sariyaw sigi o jiriw kan Ameriki Misali la, ANSI/ASME B1.20.1  ye NPT jiriw ta ye. U b’a Fɔ an ye jiriw ka kan ka bonya cogo min na, u hakɛ bɛ insi kelen na (o ye jiri jate ye), ani u ka kan ka kɛ cogo min na.

Fɛnw, fɛn dilanni sariyaw, ani sariya labatoli

Fɛn minnu bɛ kɛ, olu nafa ka bon kosɛbɛ. Fitini fanba ye nɛgɛ ye, i n’a fɔ nɛgɛ walima nɛgɛ, bawo u barika ka bon. O yɔrɔw dilanni bɛ tugu sariya gɛlɛnw kɔ walasa u lakananen don, wa u bɛna mɛn. Nin bɛ tali kɛ sariya labatoli la  – i n’a fɔ ka tugu furakɛcogo dɔ kɔ walasa ka gato dafalen tobi waati bɛɛ.

l ANSI B1.20.3  ani AS 1722.1  ye sariya dɔw ye minnu bɛ jiriw dilancogo ɲɛminɛ degun siratigɛ la.

l Angletɛri jamana na, u bɛ baara kɛ ni BS 21  ni ISO 7 ye  kama BSPT  ni BSPP jiriw  .

Dilanbagaw fana ka kan k’a lajɛ k’u ka jiriw bɛ se ka degun min kɛ, u ka kan ka min kunbɛn, k’a sɔrɔ u ma bɔn walima ka kari. O yɔrɔ de la jogoɲini  bɛ Nà.

Filɛri hakɛw, muɲuliw ani jogoɲumanya sabatili faamuyali

Filɛri hakɛw ye jiribolo janya  (jiriw ni ɲɔgɔn cɛ janya ye cogo min) ani kɛrɛ .  jiriw Misali la, BSPT jiriw bɛ ni 60° flank angle ye , o min ye fɛn dɔ ye min b’u kɛ fɛn ye min ɲɔgɔn tɛ.

l Muɲuli  ye danfara misɛnninw ye minnu bɛ Sɔn jiriw bonya n’u cogoya la. U bɛ i n’a fɔ wiggle room ka fitting pieces ɲɔgɔn na.

l Jogoɲumanya  kɔrɔ ye ka yɔrɔ kelen-kelen bɛɛ lajɛ walasa k’a dɔn ni a bɛ bɛn sariyaw ma. A bɛ iko karamɔgɔ bɛ i ka degeliw jate walasa ka da a la ko i ye jaabiw sɔrɔ ka ɲɛ.

Ni sigilan min tɛ ji bɔ , yɔrɔ dɔw i n’a fɔ PTFE kase (Teflon) , gaziw , walima O-rings  bɛ se ka kɛ ni o jiriw ye. Filɛri minnu bɛ sɔgɔsɔgɔ  i n’a fɔ NPT  ni BSPT,  olu ka teli ka siri u yɛrɛ la k’a sababu kɛ u cogoya ye – u bɛ gɛlɛya ka taa a fɛ ni u sirilen don.

Tiɲɛ teliyalenw:

l NPT  jiriw dabɔra ka kɛ interference fit ye ​​, o kɔrɔ ye ko u bɛ kɛ masin sigilan ye  ni u sɔgɔli ye ɲɔgɔn na.

l NPSM jiriw  bɛ baara kɛ ni muso pibiliki wulilan ye  – o ye nut sugu ye min b’a to i b’a siri k’a sɔrɔ i ma pipe bɛɛ tigɛli.

l NPTF jiriw  bɛ wele tuma dɔw la ko Dryseal American National Standard Taper Pipe Thread  barisa u dabɔra ka datugu ka sɔrɔ u mago tɛ fɛn wɛrɛw la i n’a fɔ kase walima paste.

Baarakɛcogo waleyali ani sɛgɛsɛgɛli min bɛ kɛ ni ɲɔgɔn ye

Diɲɛ kɔnɔ baarakɛcogo lakika ani ko kɛlenw sɛgɛsɛgɛli minnu bɛ kɛ ni jiri suguya wɛrɛw ye

Ni a bɛ tali kɛ jiriw la  minnu bɛ kɛ degunw na , o kunnafoni kunbabaw nafa ka bon. An k’a lajɛ baara bɛ Kɛ ni o jirisunw ye cogo min na diɲɛ yɛrɛ kɔnɔ.

NPT jiriw  bɛ sɔrɔ tuma caman na izini baarakɛcogo caman na. Misali la, tansiyɔn jateminɛcogo dilannikɛla dɔ  bɛ se ka baara kɛ ni NPT fɛnw ye k’a sababu kɛ u ni minɛn suguya caman bɛ bɛn ɲɔgɔn ma.

NPTF jiriw , n’a bɛ fɔ fana ko Dryseal American National Standard Taper Pipe Thread , olu dabɔra walasa ka sigilan lakana ka ɲɛ, min tɛ bɔgɔ bɔ jiri sirilan wɛrɛ ye , k’a sɔrɔ a ma kɛ ni U bɛ kɛ baarakɛyɔrɔw la, masin sigilan  nafa ka bon yɔrɔ minnu na, i n’a fɔ sɛnɛfɛnw dilancogo minɛnw na.

NPSM jiriw , walima National Pipe Straight Mechanical , a ka c' a la , olu bɛ kɛ ni muso pibiliki wulilan ye . Ko kɛlen dɔ bɛ se ka kɛ jiko siratigɛ ye, NPSM fɛnw bɛ se ka kɛ sababu ye ka u lajɛ nɔgɔya la ani ka u ladon.

BSPT jiriw , n’u kɛrɛfɛla ye 60° ye , olu ka ca diɲɛ kɔnɔ baarakɛcogo la. Tuma caman na, u bɛ sugandi u ka sigicogo ɲuman kosɔn  ji ni gazi jiginni siratigɛ la.

Sɛgɛsɛgɛli min bɛ tali kɛ ɲɔgɔn na: NPT ni NPTF, NPSM ni NPT, BSPT jɔyɔrɔ kɛrɛnkɛrɛnnen

An ka danfara minnu bɛ u ni ɲɔgɔn cɛ:

l NPT ni NPTF : U fila bɛɛ bɛ ni pibiliki jiri ye min bɛ kɛ nɛrɛmuguma ye , nka NPTF bɛ dankari kɛ  cɛ jiribolo dawolo  ni jiribolo juw , o bɛ kɛ sababu ye ka sigilan mako bɔ.

l NPSM ni NPT : NPSM bɛ ni pibiliki jiri tilennenw ye  , wa a bɛ gazi walima O-ring de wajibiya walasa ka ɲɔgɔndan dɔ dilan min tɛ ji bɔ . NPT ka jiribuluw bɛ kɛ sigilan ye jiriw yɛrɛ fɛ.

l BSPT jɔyɔrɔ kɛrɛnkɛrɛnnen : BSPT jiriw ni NPT bɔlen don nka u ka jiribolo  ni u janya tɛ kelen ye , o b’a to u tɛ se ka ɲɔgɔn falen ni NPT fɛnw ye.

Dɔnnibaaw ka hakilinaw ani izini baarakɛlaw ka laadilikanw dilancogo kan

Industri baarakɛlaw b’a fɔ ko aw ka baara kɛ ni PTFE kaseti (Teflon)  walima bololanɛgɛ sirilen ye  ni NPT fɛnw ye walasa ka a lajɛ ni sigilan tɛ ji bɔ . NPTF fɛ, a nafa ka bon kosɛbɛ ka jɛkafɔ kɛcogo ɲuman sabati walasa ka nafa sɔrɔ a ka jalen  baara la.

Ni aw bɛ baara kɛ ni BSPT jɛgɛnw ye , aw k’aw hakili to a la ko u tɛ bɛn NPT walima NPTF ma ni adapɛriw tɛ. Fɛn dɔnbagaw bɛ ladilikan di ka jiriw sariyaw lajɛ  i n’a fɔ ANSI/ASME B1.20.1  ka ɲɛsin NPT ma, ANSI B1.20.3  ka ɲɛsin NPTF ma, walima ISO 7  ani BS 21  ka ɲɛsin BSPT ma walasa ka a dɔn ko u bɛ bɛn ka ɲɛ.

Galling , walima jiri tiɲɛni, o ye farati ye ni o fɛnw ye. Walasa k’a bali, aw kana a siri kojugu abada ani ka tugu degunw kɛcogo la tuma bɛɛ .

A sigili, a ladonni ani a kɛcogo ɲumanw

Fɛɛrɛ ɲumanw ka ɲɛsin jiri suguya wɛrɛw sigili ma

Ni aw bɛ NPSM , NPTF , NPT , walima BSPT  fittings sigi, a nafa ka bon ka laadilikan kɛrɛnkɛrɛnnenw labato walasa ka ɲɔgɔndan kɛ min tɛ ji bɔ . Nin ye gafe teliya ye:

l NPT  ni NPTF : 1 .

l Aw bɛ kɛ PTFE kaseti  walima jiri sirilan bɛnnen dɔ  cɛya jiri la.

l Aw bɛ finimugu siri ni bolo ye, o kɔ aw bɛ baara kɛ ni fɛn dɔ ye min bɛ kɛ ka wuli labanw kɛ.

l Aw ye aw janto aw kana a siri kojugu, barisa o bɛ se ka jiriw tiɲɛ.

l BSPT : 1 .

l I n’a fɔ NPT, aw bɛ PTFE kaseti  walima jiri sirilan kɛ.

l Aw bɛ a siri ka ɲɛ walasa ka se ka masin siri.

l NPSM : 1 .

l O jiri ninnu dilannen don walasa u ka ɲɔgɔn sɔrɔ ni muso pibiliki wulilan ye.

l Aw bɛ kɛ gazi  walima O-ring  ka a datugu.

l Aw kana a siri kojugu, barisa a bɛ se ka tiɲɛni kɛ gazi la.

Gɛlɛya minnu bɛ sɔrɔ tuma caman na sigili la ani u kunbɛncogo

l Cross-threading : A bɛ kɛ ni jiriw ma ɲɔgɔn sɔrɔ. Aw bɛ a daminɛ ni bolo ye tuma bɛɛ walasa ka a bali.

l Galling : Nɛgɛ ni nɛgɛ ni ɲɔgɔn cɛ bɛ se ka kɛ sababu ye ka o kɛ. Aw bɛ tulumafɛnw kɛ walasa ka aw yɛrɛ tanga a ma.

l A sirili kojugu : A bɛ se ka kɛ sababu ye ka jiriw tiɲɛ. Aw bɛ tansiyɔn jateminɛcogo  sariyaw labato walasa ka girinya ɲuman sɔrɔ.

l Jibɔ : Ni bɔgɔbɔgɔli kɛra, aw bɛ a lajɛ ni a ma kɛ bulama ye  ani ka a lajɛ ni jiribolo bɛ don ka ɲɛ.

Filɛriw ladonni, u gɛlɛyaw ɲɛnabɔcogo ani u ka ɲɛnamaya jan sabatili

l Sɛgɛsɛgɛli kɛli tuma bɛɛ : Aw bɛ a lajɛ ni taamasiɲɛw bɛ a la ko a bɛ sɛgɛn, ka a sɔgɔ, walima ka a tiɲɛ.

l Saniya : Aw bɛ jiriw saniya. Nɔgɔ bɛ se ka kɛ sababu ye ka ji bɔ.

l Sigilan kɛli kokura : Waati tɛmɛnen kɔfɛ, sigilan bɛ se ka tiɲɛ. Aw bɛ segin ka a kɛ i n’a fɔ aw mago bɛ cogo min na.

l A maracogo ɲuman : Aw bɛ fɛnw mara yɔrɔ jalen na, yɔrɔ min saniyalen don.

Ka hakilina jigi :

l  NPT  ni NPTF  jiriw bɛ sigilan dɔ da ni dankarili ye min bɛ kɛ  cɛ jirisunw dawolo  ni u juw .

l  BSPT  jiriw bɛ datugu ni jiriw dɔrɔn ye, ni 60° kɛrɛfɛla ye  min bɛ dɛmɛ don sigili nafama na.

l  NPSM  jiriw bɛ u jigi da masin ɲɔgɔndan kan , tuma caman na, a bɛ bonya ni gazi  walima O-ring ye.

Ɲininkaliw minnu bɛ kɛ Thread Fittings kan

Danfaraba minnu bɛ NPSM, NPTF, NPT ani BSPT jiriw cɛ

Ni a bɛ na ni jiriw fitiniw ye , a bɛ i n’a fɔ puzzle. O yɔrɔ kelen-kelen bɛɛ bɛ bɛn cogo dɔ la. NPSM  (National Pipe Straight Mechanical) jiriw bɛ tilennen ani u dabɔra masin jogindaw kama minnu bɛ se ka don u yɛrɛ la. NPT  (National Pipe Tapered) jiriw bɛ kɛ nɛrɛmuguma ye ani ka sigilan sirilen kɛ ni u donna ka dun ka taa a fɛ ni u sirilen don NPTF  (National Pipe Taper Fuel), n’a bɛ fɔ fana ko Dryseal American National Standard Taper Pipe Thread , o ni NPT bɔlen don nka a dabɔra sirili ɲuman kama k’a sɔrɔ a mago tɛ sigilan wɛrɛ la. BSPT (British Standard Pipe Taper) jiriw bɛ kɛ ka sigilan sirilenw dilan degun siratigɛ la, wa u kɛrɛfɛla bɛ kɛ 55° ye, o ni 60° kɛrɛ min bɛ kɛ NPT jiriw la, o tɛ kelen ye. Faan wɛrɛ fɛ,

Yɛlɛma-yɛlɛma, Jɛɲɔgɔnya minnu tɛ bɔgɔbɔgɔ, ani fili minnu bɛ kɛ tuma caman

Sisan, yala i bɛ se k’u ɲagami wa? Tiɲɛ na, o tɛ. Interchangeability  tɛ tulon ye i b’a fɛ ka min kɛ ni jiriw fitiniw ye. Baara kɛli ni NPT ye  ni NPTF ye  , o bɛ se ka baara kɛ tuma dɔw la, nka a tɛ garanti ye ko a bɛ kɛ ɲɔgɔndan ye min tɛ fɛn bɔ . Ani BSPT ? O ye maana wɛrɛ ye pewu k’a sababu kɛ a ka jiribolo-yɔrɔ n’a fɔcogo ɲɔgɔn tɛ. Misali min ka teli ka kɛ? Ni an y’a miiri k’u bɛɛ bɛ bɛn ɲɔgɔn ma. Aw bɛ sariyaw lajɛ tuma bɛɛ, i n’a fɔ ANSI/ASME B1.20.1  ka ɲɛsin NPT ma, walasa ka aw tanga bɔgɔbɔli walima tiɲɛni ma.

Fɛnɲɛnɛma suguya ɲuman latigɛli baarakɛcogo kɛrɛnkɛrɛnnenw kama

O la sa, i bɛ se ka min bɛnnen ta cogo di? Miiri o baara la. Walasa ka ji ni gazi bila , sigilan min tɛ bɔgɔ bɔ,  o ye fɛnba ye. Ni aw bɛ baara kɛ ni degun siraw ye , BSPT  bɛ se ka kɛ sira ye. Ni baarakɛminɛn minnu mago bɛ masina sigilan na  ni sigilan tɛ, NPTF  ye i teri ye. Wa, kama masinw ka jɛɲɔgɔnya  min bɛ se ka bɔ ɲɔgɔn na nɔgɔya la, NPSM  bɛ se ka kɛ sugandili ɲuman ye.

Ɲininkali wɛrɛw minnu bɛ haminankow ɲɛnabɔ minnu bɛ se ka kɛ

l Sigilan ɲuman ye mun ye? 

PTFE kaseti  (Teflon) bɛ kɛ tuma caman na ni NPT jiriw ye walasa ka dɛmɛ don ka datugu.

l Ne ka kan ka u siri ka siri cogo di? 

Aw bɛ taa interference fit dɔ fɛ —a sirilen don kosɛbɛ walasa jiribolo dawolo  ni a juw  ka digi ɲɔgɔn na, nka a kana siri fo ka se ka jiriw bɔ.

l Anglɛriw dun? 

Aw ye aw hakili to a la ko NPT  ni NPTF  bɛ ni 60° flank angle ye , ani BSPT  bɛ 55° angle.

l Yala ne bɛ se ka baara kɛ ni nin fitini ninnu ye kokura wa?

 Tuma dɔw la, nka aw k’aw janto galling na —ni jiriw sɛgɛnna ka nɔrɔ ɲɔgɔn na.

l Ni a bɛ bɔgɔbɔgɔ do?

 Aw bɛ a lajɛ ni tiɲɛni tɛ walima ka a lajɛ ni bololanɛgɛ sirilen ye  walima ka O-ring dɔ kɛ  walasa ka lakanani wɛrɛ sɔrɔ.

I hakili to a la ko ka bɛnkan ɲuman sɔrɔ, o bɛ i n’a fɔ ka baarakɛminɛn ɲuman sugandi baara kama. A bɛɛ bɛ kɛ kunnafoni fitininw de kan. Aw ye nin laadilikanw to aw hakili la, o la aw bɛna kɛ sira kan walasa ka jiriw doncogo dɔn kosɛbɛ  walasa ka ɲɔgɔndanw kɛ minnu tɛ ji bɔ.

Kuncɛli

Ni an bɛ kuma jiriw labɛncogo kan  i n’a fɔ NPSM , NPTF , NPT , ani BSPT , an bɛ kuma yɔrɔw kan minnu b’an dɛmɛ ka pibilikiw ni hosew fara ɲɔgɔn kan. O fɛnw b’a to an ka ji, gazi ani fɛn wɛrɛw bɛ tɛmɛ pibilikiw fɛ k’a sɔrɔ u ma bɔn. An ye min kalan, o filɛ nin ye:

l NPT ye  suguya dɔ ye min bɛ kɛ ni jiri ye jiri  min bɛ kɛ kosɛbɛ USA. A bɛ kɛ fɛn ye min bɛ bɛn kosɛbɛ barisa jiriw bɛ dɔgɔya a dakun kelen na, a bɛ i n’a fɔ kɔni.

l NPTF , n’a bɛ fɔ fana ko Dryseal American National Standard Taper Pipe Thread , o bɛ i n’a fɔ NPT nka a dabɔra ka sigilan dɔ kɛ min ka gɛlɛn ka tɛmɛn fɔlɔ kan, min tɛ ji bɔ,  k’a sɔrɔ a mago tɛ fɛn wɛrɛw la i n’a fɔ PTFE kaseti.

l NPSM , walima National Pipe Straight Mechanical , pibiliki jiri tilennenw bɛ a la . A ka ɲi ka masin jɛɲɔgɔnya kɛ  min bɛ se ka bɔ ɲɔgɔn na ka segin ka don ɲɔgɔn na nɔgɔya la.

l BSPT , n' o ye tubabukan standard Pipe Taper surun ye , o ni NPT bɔlen don nka a jiribolo  ni a fɔcogo tɛ kelen ye . A ka ca yɔrɔw la minnu bɛ baara kɛ ni tubabukan sariyaw ye.

Aw ye aw hakili to a la ko ka bɛnkan ɲuman sɔrɔ, o kɔrɔ ye ka aw ka jiriw sariyaw dɔn  ani ka suguya ɲuman sugandi aw ka degunw kama.

Siniko minnu bɛna kɛ jirisunw doncogo fɛɛrɛw la ani izini ladilikanw

ka diɲɛ Filɛriw  bɛ to ka Changé. Fɛn min bɛ kɛnɛ kan, o filɛ nin ye:

l Sigili kɛcogo ɲuman  bɛ ka ɲɛ. An bɛ fɛɛrɛw ɲini ka jɛɲɔgɔnyaw kɛ minnu bɛ super tight kɛ k’a sɔrɔ an mago tɛ gazi  walima O-ring wɛrɛw la.

l Fɛnw  bɛ ka ɲɛtaa sɔrɔ, olu fana. O kɔrɔ ye ko fitiniw bɛ se ka degun caman kunbɛn ani ka mɛn.

l Dɔnnibaaw b’a ɲini ka tugu izini ladilikanw kɔ tuma bɛɛ , i n’a fɔ ka baara kɛ ni ANSI/ASME B1.20.1  ye NPT kama walima ISO 7  kɛli BSPT kama, walasa ka a dɔn ko fɛn bɛɛ bɛ bɛn ɲɔgɔn ma.