![NPSM ne NPTF ne NPT ne BSPT .]()
So wohaw wo denam NPSM, NPTF, NPT, ne BSPT nhama a wonte ase no so? Saa asɛm yi bɛkyerɛ wo kwan wɔ saa nhama yi ho ntease a ɛkɔ akyiri mu, na ɛbɛkyerɛ wo sɛnea wode besisi hɔ ka nneɛma a ɛho hia a ɛsɛ sɛ wususuw ho ho.
Nhwehwɛmu a ɛkɔ akyiri a ɛfa asaawa ahorow ho .
NPT (National Pipe Taper) Nhama .
![NPT asaawa .]()
Nkyerɛase, su, ne nhyehyɛe ho mfitiasesɛm .
NPT gyina hɔ ma National Pipe Tapered . Ɛyɛ asaawa a ɛyɛ teateaa a wɔde ka nhama ne nneɛma a wɔde hyɛ mu ho. Nea ɛsɛ sɛ wuhu ni:
L tapered threads : NPT threads taper wɔ rate a ɛyɛ 1/16 inch wɔ inch biara mu, a ɛkyerɛ sɛ ɛyɛ teateaa kɔ awiei.
l Thread Standards : Wodi ANSI/ASME B1.20.1 gyinapɛn no akyi.
l asaawa anim : Nhama no wɔ 60° flank angle ..
l Nsɔano Efficiency : Wɔnam ntwitwiridii a ɛwɔ asaawa mfiri nsɔano . ntam no yɛ no atifi ne ntini .
Nneɛma a wɔde di dwuma wɔ piping nhyehyɛe ne nnwuma mu .
NPT nhama wɔ baabiara wɔ nhyɛso nhyehyɛe mu . Wɔde di dwuma de hwɛ hu sɛ nsɔano a nsu ntumi nkɔ mu wɔ:
l Nsuo ne gas a wɔde fa mu : nsuo afiri a ɛde nsuo, ngo, anaa gas kɔ.
l Pressure Calibration Systems : Nneɛma a wɔde susuw nhyɛso.
Nnwuma a wɔde NPT nhama di dwuma no bi ne:
l Nneɛma a wɔyɛ .
l Automotive .
l Ahunmu .
Installation tips, nneyɛe pa, ne nea wɔtaa de di dwuma .
Sɛ wode NPT nhama rehyɛ mu a, di nneyɛe pa yi akyi:
1. Fa PTFE tape di dwuma : Fa PTFE tape (Teflon) kyekyere ɔbarima asaawa no ho na ama nsɔano no atu mpɔn.
2. Don't over-tighten : over-tightening betumi ama galling , baabi a nhama no sɛe.
3. Hwɛ sɛ leaks : bere nyinaa sɔ connection no hwɛ sɛ leaks.
Nneɛma a wɔtaa de di dwuma no bi ne:
l Connecting Pipes : Te sɛ nea ɛwɔ wo fie nsu mu no.
l Fittings : Te sɛ elbows anaa tees a ɛboa ma ɛsesa kwan a ɛsen no.
Mfaso, anohyeto ahorow, ne nsonsonoe a ɛwɔ NPTF mu .
Mfaso a ɛwɔ so:
L Leak-Free Connection : Wɔayɛ no sɛnea ɛbɛyɛ a ɛbɛma nsɔano a ɛyɛ den aba.
l Wɔgye tom kɛse : NPT yɛ gyinapɛn wɔ nnwuma pii mu.
Anohyeto ahorow: .
l Asiane a ɛwɔ mu sɛ ɛbɛhyɛ no den dodo : Ɛyɛ yie sɛ wobɛsɛe nhama no.
l betumi ahwehwɛ sealant : ɛtɔ da bi a, extra sealant ho hia na ama wɔahwɛ ahu sɛ nsu a ɛretu a ɛnyɛ nea ɛretu.
Nsonsonoe a ɛwɔ NPTF mu:
L NPTF , anaa National Pipe Taper Fuel , a wɔsan frɛ no Dryseal American National Standard Taper Pipe Thread , no yɛ nea wɔayɛ no sɛnea ɛbɛyɛ a ɛbɛma nsɔano a ɛyɛ den a ɛho nhia sɛ wɔde sealant foforo hyɛ mu.
L NPTF nhama no wɔ nhyehyɛɛ soronko kakra a ɛma kwan ma wɔde mfiri di dwuma a wɔmfa nni dwuma PTFE tape anaa sealants afoforo , ɛnte sɛ NPT nhama a ɛtaa hwehwɛ no.
Kae sɛ, NPT fa tapered pipe thread connection a wɔyɛ a wotumi de ho to so na wɔde di dwuma kɛse ho. Sɛ́ ebia woreyɛ kar bi ho adwuma anaasɛ woresiesie nsu a ɛretu wɔ fie no, sɛ wunim NPT nhama ho asɛm a, ɛboa ma wunya nkitahodi a eye.
NPTF (National Pipe Taper Fuel) Nhama .
![NPT vs NPTF .]()
NPTF asaawa gyinapɛn ne ne nsusuwii ho nsɛm a wɔaka abom .
NPTF nhama, a wɔsan frɛ no Dryseal American National Standard Taper Pipe Thread , di ANSI B1.20.3 gyinapɛn ahorow no akyi. Saa nhama yi te sɛ NPT nanso wɔayɛ ama nsɔano a eye. NPTF nhama no wɔ 60° flank angle na ɛyɛ mfiri nsɔano denam interference fit a ɛwɔ thread crests ne roots ntam. Eyi kyerɛ sɛ nhama no bubu bom ma ɛyɛ nsɔano a ɛyɛ den a enhia sɛ wɔde sealants foforo hyɛ mu.
Nsonsonoe a ɛda NPT ne NPTF ntam .
Bere a NPT ne NPTF nhama no te sɛ nea ɛte no, wɔn nsusuwii yɛ soronko . Wɔayɛ NPT nhama wɔ ANSI/ASME B1.20.1 ase , na ebia ebehia PTFE tape anaasɛ sealants afoforo na ama nkitahodi a nsu ntumi nkɔ mu . Ɔkwan foforo so no, NPTF nhama, a edi ANSI B1.20.3 akyi no , wɔyɛ no ma ɛyɛ den na ɛyɛ nsɔano a enni nneɛma foforo. Wɔnam nhyehyɛe bi a ɛma asaawa no atifi ne ntini no tumi bɔ mu, na ɛma nsɔano a nsu ntumi nkɔ mu ba ..
Nneɛma a wɔde di dwuma wɔ petrol ne gas mu, a ɛma wonya nsɔano a nsu ntumi nkɔ mu .
Wɔ wiase a petrol ne gas , NPTF nhama yɛ kɔ-kɔ-paw. Wɔayɛ no sɛnea ɛbɛyɛ a ɛbɛyɛ nsɔano a nsu ntumi nkɔ mu a ɛho hia kɛse wɔ nhyɛso nhyehyɛe mu . Saa nhyehyɛe ahorow yi ntumi ntɔ nsu a ɛretu, efisɛ nea ɛyɛ ketewaa bi mpo betumi ayɛ asiane. Wɔde NPTF nhama di dwuma wɔ nhyɛso calibration nhyehyɛe ne afã horow mu wɔ baabi a nsu anaa mframa no ahotew ne ne mudi mu kura ho hia kɛse.
Nneɛma a wɔde di dwuma ho nsɛm, nea ɛne ne ho hyia, ne sɛnea ɛne NPT sesa .
Wɔtaa hu NPTF nhama wɔ nneɛma a wɔde di dwuma wɔ baabi a nsɔano a nsu ntumi nkɔ mu ho hia, na wɔpɛ sɛ wɔde sealant biara hyɛ mu. Nanso, bere a ɛtɔ mmere bi a wobetumi de NPTF ne NPT nhama adi afra no, ɛnyɛ bere nyinaa na eyi nyɛ nea ahobammɔ wom anaasɛ etu mpɔn. Wobetumi de NPTF nhama no ayɛ NPT fittings, nanso ebia nea ɛwɔ akyi no rensɔ nsɔw yiye efisɛ wɔayɛ NPTF no sɛnea ɛbɛyɛ a ɛbɛbɛn. Ɛho hia sɛ wohwɛ sɛnea ɛne ne ho hyia ansa na woafra mu na woakwati nsɛm te sɛ galling anaasɛ sealing a ɛmfata.
NPSM (Ɔman Pipe Straight Mechanical) Nhama .
![NPSM .]()
NPSM nhama no nkyerɛase, ne su, ne nea ɛho hia .
NPSM nhama yɛ nhama a ɛyɛ tẽẽ a ɛyɛ tẽẽ . Wɔdi ANSI/ASME B1.20.1 gyinapɛn akyi. Wɔayɛ saa nhama yi ama mfiri nkitahodi mmom sen sɛ ɛbɛyɛ nsɔano. Wɔn wɔ 60° afã a ɛyɛ anim na wɔayɛ sɛ wɔde bedi dwuma wɔ gasket anaa O-ring mu de ayɛ nkitahodi a nsu ntumi nkɔ mu ..
Nsɛntitiriw atitiriw a ɛfa NPSM nhama ho: - Ɛyɛ parallel , a ɛkyerɛ sɛ ne ntwemu no yɛ pɛpɛɛpɛ. - NPSM nhama no nnyɛ te sɛ NPT (National Pipe tapered) nhama. - a wode di dwuma de ye mfiri nkitahodi . - sealing efficiency no firi gaskets mu, ɛnyɛ threads no ankasa.
Nneɛma a wɔde di dwuma wɔ hydraulic nhyehyɛe mu ne nsɛm a eye a wɔde di dwuma .
Wɔtaa hu NPSM nhama wɔ hydraulic nhyehyɛe mu baabi a nsɔano a nsu ntumi nkɔ mu ho hia kɛse. Wɔyɛ adwuma yiye wɔ nhyɛso nhyehyɛe te sɛ nhyɛso calibration nhyehyɛe mu . Ɔbea paipu swivel fittings no abu so wɔ NPSM nhama mu, na ɛma ɛyɛ mmerɛw sɛ wɔde besisi mmeae a ɛyɛ den.
Nsɛm a ɛfata a wɔde di dwuma no bi ne: - baabi a mfiri nsɔano ho hia sen asaawa nsɔano. - nhyehyeɛ a ɛhwehwɛ sɛ wɔtaa paapae mu na wɔsan boaboa ano. - se wode gasket anaa o-ring redi dwuma a , wope sene asaawa sealant ..
Ntotoho a ɛfa thread ahorow afoforo ho no, ɛne NPTF sesa .
Ɛtɔ mmere bi a wobetumi de NPSM ayɛ basaa wɔ NPTF (ɔman no mu paipu taper petrol), a wɔsan frɛ no Dryseal American National Standard Taper Pipe Thread . Sɛnea wɔde toto ho ni:
L NPTF nhama no sɛnea ɛbɛyɛ a ɛbɛma Wɔayɛ nsɔano a nsu ntumi nkɔ mu a enhia sɛ wɔde sealants foforo gu mu no ma. Wɔyɛ interference fit wɔ ntam . thread crests ne thread roots .
L NPSM nhama no hia gasket anaa o-ring na ama nkitahodi a nsu ntumi nkɔ mu no ayɛ adwuma ..
L NPSM ntumi nsesa NPTF anaa NPT esiane asaawa gyinapɛn ahorow nti.
Nsɔano a wɔde hyɛ mu yiye ne nnwuma a wɔde di dwuma .
NPSM nhama no bo yɛ den ma wɔn nsɔano a ɛyɛ adwuma yiye bere a wɔde di dwuma wɔ mfiri nsɔano a ɛfata mu no . Wɔde di dwuma kɛse wɔ: - nsu ne gas a wɔde fa nneɛma mu. - nnwuma a ehia mfiridwuma mu nkitahodi a wotumi de ho to so ..
Nnwuma mu dwumadie no bi ne: - Nsuo ne nsuo fĩ a wode bedi dwuma. - a ewo mframa mu. - a wode srade gu mu.
BSPT (British Standard Pipe Taper) Nhama .
![BSPT asaawa a wɔde hyɛ mu .]()
BSPT asaawa gyinapɛn ho nnianim asɛm .
Sɛ yɛka BSPPt nhama ho asɛm a , yɛrekɔ wiase a nsu afiri ne nkitahodi a ɛho hia ma nsu ne gas a wɔde fa mu no mu . BSPT gyina hɔ ma British Standard Pipe Taper . Ɛyɛ asaawa bi a ɛyɛ teateaa a wɔde yɛ nsɔano a nsu ntumi nkɔ mu . Saa gyinapɛn yi yɛ nea wɔakyerɛ wɔ nkrataa te sɛ BS 21 ne ISO 7 mu ..
Nneɛma a ɛda nsow ne NPT ne NPTF a wɔde toto ho .
BSPT nhama no yɛ soronko. Wɔwɔ 60° afã a ɛyɛ anim na ɛyɛ teateaa, a ɛkyerɛ sɛ ɛyɛ teateaa bere a ɛkɔ akyiri no. Eyi yɛ soronko wɔ NPT nhama , a ɛno nso yɛ teateaa nanso ɛwɔ 60° nhama anim a wɔde di dwuma wɔ Amerika, sɛnea ANSI/ASME B1.20.1 kyerɛ ase..
Afei, momma yɛmfa BSPT ntoto NPTF ho . NPTF, anaa National Pipe Taper Fuel , a wɔtaa frɛ no Dryseal American National Standard Taper Pipe Thread , sɛnea ANSI B1.20.3 kyerɛ no , wɔayɛ ama nsɔano a ɛyɛ den sen NPT. Ɛyɛ eyi denam ntwitwiridii a ɛfata a ɛba wɔ asaawa no atifi ne asaawa ntini ntam no so . BSPT mfa ne ho nto saa fit yi so ma nsɔano. Mmom no, ebia ebehia asaawa a wɔde hyɛ mu te sɛ PTFE tape (Teflon) anaasɛ gasket na amma nsu no ankɔ.
BSPT wɔ amanaman ntam ne wiase nyinaa dwumadie mu .
Wɔde BSPT nhama di dwuma kɛse wɔ United States akyi, titiriw wɔ aman a wodi Britania mfiridwuma gyinapɛn ahorow akyi no mu. Wɔtaa hu wɔn wɔ nhyɛso nhyehyɛe ne nhyɛso a wɔde yɛ nneɛma mu . Wɔn tumi a wɔde yɛ mfiri nsɔano no ma ɛfata ma amanaman ntam dwumadie pii.
Nhwehwɛmu a wɔde toto ho ne nhama ahorow afoforo .
Sɛ yɛhwɛ BSPT nkyɛn wɔ nhama ahodoɔ foforɔ te sɛ NPSM (National Pipe Straight Mechanical) ne BSPP (British Standard Parallel Pipe) , yɛhunu sɛ BSPT yɛ deɛ ɛbɛma nkitahodiɛ a ɛnnyɛ nsuo a ɛretuo wɔ nhama a ɛyɛ teateaa mu, berɛ a NPSM ne BSPP yɛ ma pipe nhama a ɛyɛ tẽẽ BSPT nhama yɛ mfiridwuma mu nkitahodi a enhia sɛ wɔde bonded ring seal anaa o-ring , ɛnte sɛ BSPP a ebia ebehia eyinom ama sealing.
BSPT nhama no yɛ kɛse ma tebea horow a wuhia nsɔano a ɛyɛ den a nsu ntumi nkɔ mu a akwan foforo a wɔfa so hyɛ mu no yɛ den. They’re simpler to use than NPTF threads , a ɛhwehwɛ nhyɛso calibration pɛpɛɛpɛ na wɔakwati nsɛm te sɛ galling anaasɛ ɔsɛe a efi over-tightening mu.
Mfiridwuma ho nsɛm ne gyinapɛn ahorow .
Standard susudua, asaawa dodow, ne ANSI gyinapɛn ahorow .
Sɛ yɛreka thread fittings te sɛ NPSM, NPTF, NPT, ne BSPT ho asɛm a, ne nyinaa fa sɛnea ɛka bom na ɛyɛ seal pipes ho. Saa asaawa gyinapɛn ahorow yi boa yɛn ma yɛhwɛ hu sɛ nneɛma hyia yiye. Susuw ho sɛ Lego blocks – ɛsɛ sɛ ɛne wɔn ho hyia pɛpɛɛpɛ na ama wɔabata ho.
L NPSM ne NPs wɔ threads a ɛyɛ tẽẽ, a ɛkyerɛ sɛ ɛnyɛ tighter bere a screw kɔ mu no.
L NPT , NPTF , na BSPT yɛ teateaa. Eyi kyerɛ sɛ wɔyɛ tighter, ɔkwan bi so te sɛ funnel, a ɛboa ma wogyae leaks.
American National Standards Institute (ANSI) de mmara a ɛfa saa nhama yi ho wɔ U.S. sɛ nhwɛso no, ANSI/ASME B1.20.1 yɛ NPT nhama. Wɔkyerɛ yɛn sɛnea ɛsɛ sɛ nhama no yɛ kɛse, dodow a ɛwɔ hɔ wɔ nsateakwaa biako mu (ɛno ne asaawa dodow), ne sɛnea ɛsɛ sɛ wonya.
nneɛma, nneɛma a wɔyɛ ho gyinapɛn, ne nea wodi so .
Nneɛma a wɔde yɛ adwuma no ho hia kɛse. Nneɛma a wɔde hyɛ mu dodow no ara yɛ dade, te sɛ dade anaa kɔbere, efisɛ ɛyɛ den. Saa afã horow yi a wɔyɛ no di mmara a emu yɛ den so de hwɛ hu sɛ ɛyɛ nea ahobammɔ wom na ɛbɛtra hɔ akyɛ. Eyi fa compliance ho – te sɛ aduan a wodi akyi di keeki a edi mũ bere biara.
L ANSI B1.20.3 ne AS 1722.1 yɛ gyinapɛn ahorow a ɛkyerɛ sɛnea wɔyɛ nhama ma bi . nhyɛso nhyehyɛe ahorow no .
l Wɔ UK no, wɔde BS 21 ne ISO 7 di dwuma ma BSPT ne BSPP nhama.
Ɛsɛ sɛ wɔn a wɔyɛ no nso hwɛ hu sɛ wɔn nhama no betumi adi nhyɛso a ɛsɛ sɛ ɛba no ho dwuma a ɛrentwe anaasɛ ɛrensɛe. Ɛhɔ na quality assurance ba.
Nteaseɛ a ɛfa asaawa nsusuiɛ, abodwokyɛre, ne su pa ho .
Nhama nsusuwii no bi ne ɛnne no ano (sɛnea nhama no ntam kwan ware) ne anim . nhama no Sɛ nhwɛso no, BSPT nhama no wɔ 60° flank angle , a ɛyɛ nea ɛma ɛyɛ soronko no fã.
L Tolerances yɛ nsonsonoe nketenkete a wɔma ho kwan wɔ nhama no kɛse ne ne nsusuwii mu. Wɔte sɛ wiggle room a ɛwɔ fitting pieces mu no bom.
l Quality assurance kyerɛ sɛ wobɛhwɛ ɔfa biara mu ahwɛ sɛ ɛdu gyinapɛn ahorow no ho. Ɛte sɛ ɔkyerɛkyerɛfo bi a ɔreyɛ wo fie nnwuma ho mfonini de ahwɛ ahu sɛ woanya mmuae no yiye.
Sɛnea ɛbɛyɛ a wobetumi de nsɔano a nsu ntumi nkɔ mu , no , PTFE tape (Teflon) , gaskets , anaasɛ O-rings adi dwuma wɔ saa nhama yi ho. wobetumi de afã horow te sɛ Nhama a ɛyɛ teateaa te sɛ NPT ne BSPT taa tumi siesie wɔn ho wɔ wɔn ankasa so esiane wɔn nsusuwii nti – wɔyɛ den na ɛyɛ den bere a wɔabɔ wɔn mu no.
Nokwasɛm a Ɛyɛ Ntɛmntɛm:
L NPT nhama no sɛ ɛbɛyɛ Wɔayɛ interference fit , a ɛkyerɛ sɛ ɛyɛ mfiri nsɔano denam squeezing a wɔde bom so.
L NPSM nhama ne ɔbea paipu swivel yɛ adwuma – nut bi a ɛma wotumi twitwa no a wunkyinkyim paipu no nyinaa.
l NPTF nhama no ɛtɔ da bi a wɔfrɛ no Dryseal American National Standard Taper Pipe Thread ɛfiri sɛ wɔayɛ sɛ ɛbɛsɔ ano a enhia sɛ wɔde nneɛma foforɔ te sɛ tape anaa paste.
Nneɛma a wɔde di dwuma a mfaso wɔ so ne ntotoho nhwehwɛmu .
Wiase ankasa mu dwumadie ne nsɛm a wɔayɛ ho nhwehwɛmu a ɛfa nhama ahodoɔ ho .
Sɛ ɛba thread fittings a wɔde di dwuma wɔ pressure systems mu a , nsɛm a ɛkɔ akyiri no ho hia. Momma yɛnhwɛ sɛnea wɔde saa nhama yi di dwuma wɔ wiase ankasa mu.
NPT nhama wɔ mfiridwuma mu dwumadie mu. Wɔtaa hu Sɛ nhwɛso no, obi a ɔyɛ pressure calibration systems no betumi de NPT fittings adi dwuma esiane sɛ ɛne nnwinnade ahorow pii hyia nti.
Wɔayɛ NPTF nhama , a wɔsan frɛ no Dryseal American National Standard Taper Pipe Thread , sɛ wɔmfa nsɔano a ahobammɔ wom kɛse a nsu ntumi nkɔ mu a enhia sɛ wɔde nhama a wɔde hyɛ mu foforo ka ho . Wɔde di dwuma wɔ dwumadie mu baabi a mfiri nsɔano ho hia, te sɛ nea ɛwɔ mfiri a wɔde ma pɛtro mu.
NPSM nhama , anaa National Pipe Straight Mechanical , na wɔtaa de di dwuma wɔ ɔbea paipu a ɛdannan mu . Nsɛm a wɔayɛ ho nhwehwɛmu betumi ayɛ hydraulic system a NPSM fittings ma kwan ma ɛyɛ mmerɛw sɛ wɔbɛhyehyɛ na wɔasiesie.
BSPT nhama , a ɛwɔ 60° flank angle , abu so wɔ amanaman ntam dwumadie mu. Wɔtaa paw wɔn esiane wɔn sealing efficiency wɔ fluid ne gas transfer systems mu nti.
Ntotoho nhwehwɛmu: NPT vs. NPTF, NPSM vs. NPT, BSPT gyinabea soronko .
Momma yɛnpaapae nsonsonoe ahorow no mu:
L NPT vs. NPTF : abien no nyinaa wɔ pipe asaawa a ɛyɛ teateaa , nanso NPTF ma interference fit wɔ thread crests ne thread roots ntam , na eyi hia a ehia sɛ wɔde sealant ba no fi hɔ.
L NPSM vs. NPT : NPSM wɔ paipu nhama a ɛyɛ tẽẽ na ɛhia gasket anaa O-ring na ama nkitahodi a ɛretu a ɛretu . NPT nhama a ɛyɛ teateaa no yɛ nsɔano denam nhama no ankasa so.
L BSPT gyinabea soronko : BSPT nhama no te sɛ NPT nanso ɛwɔ asaawa anim ne ɛnne soronko , ɛma ɛnyɛ nea ɛne NPT fittings hyia.
Abenfo nhumu ne nnwuma ho abenfo afotu wɔ asaawa a wɔde hyɛ mu ho .
Nnwumayɛfo kyerɛ sɛ wɔmfa PTFE tape (Teflon) anaasɛ ring seal a wɔde ahyɛ mu a NPT fittings wom nni dwuma na ama wɔahwɛ ahu sɛ nsɔano a nsu ntumi nkɔ mu . Wɔ NPTF fam no, ɛho hia sɛ wɔhwɛ ma wɔde wɔn ho hyɛ mu yiye na ama wɔanya ne dryseal dwumadi no so mfaso.
Sɛ wo ne BSPT nkitahodi yɛ adwuma a , kae sɛ ɛne NPT anaa NPTF nhyia a adapter ahorow nni mu. Abenfoɔ tu fo sɛ hwɛ asaawa gyinapɛn te sɛ ANSI/ASME B1.20.1 ma NPT, ANSI B1.20.3 ma NPTF, anaa ISO 7 ne BS 21 ma BSPT de hwɛ sɛ ɛfata yie.
Galling , anaasɛ asaawa a ɛsɛe no yɛ asiane wɔ saa nneɛma yi mu. Sɛnea ɛbɛyɛ a wobesiw ano no, mma ɛnhyɛ mu dodo da na bere nyinaa di nhyɛso nhyehyɛe ahorow no akyi ' nkyerɛkyerɛmu ahorow.
Nneɛma a wɔde si hɔ, nsiesie, ne nneyɛe pa .
Nneyɛe pa a wɔde hyɛ thread ahorow ahorow mu .
Sɛ wode NPSM , NPTF , NPT , anaa BSPT fittings rehyɛ mu a, ɛho hia sɛ wodi akwankyerɛ pɔtee bi akyi na ama woahwɛ ahu sɛ nkitahodi a nsu ntumi nkɔ mu . Akwankyerɛ a ɛyɛ ntɛm ni:
L NPT ne NPTF : .
l Fa PTFE tape anaa asaawa a ɛfata a wɔde hyɛ ɔbarima asaawa no so.
l Fa nsa kyekyere fitting no mu den, afei fa wrench yɛ dannan a etwa to no.
l Hwɛ yiye na woanhyɛ no den dodo, efisɛ eyi betumi asɛe nhama no.
L BSPT : .
l te sɛ NPT, fa PTFE tape anaa asaawa sealant di dwuma ..
l Tighten ahwɛyiye mu na ama woanya mfiri nsɔano ..
L NPSM : .
l Wɔayɛ saa nhama yi sɛnea ɛbɛyɛ a ɛne ɔbea paipu dannan ..
l Fa gasket anaa o-ring di dwuma de hyɛ mu.
l Nhyɛ no den dodo, efisɛ ebetumi asɛe gasket no ..
Nsɛnnennen a ɛtaa ba wɔ instɔlehyɛn mu ne sɛnea wobedi so .
l cross-threading : Ɛsi bere a nhama no nhyia. Bere nyinaa fi ase nsa na siw ano.
l Galling : Metal-to-metal contact betumi de eyi aba. Fa srade di dwuma na kwati.
l Over-tightening : Ebetumi ama asaawa asɛe. Di akyi . pressure calibration systems akwankyerɛ a ɛfa torque a ɛfata ho
l Leakage : Sɛ nsuo a ɛretuo no ba a, hwɛ sɛ ɛyɛ kurukuruwa na hwɛ hu sɛ asaawa no de ne ho hyɛ mu yie ..
Nsiesiei, ɔhaw ahorow a wosiesie, ne hwɛ a wɔhwɛ hu sɛ asaawa a wɔde hyɛ mu no bɛtra hɔ akyɛ .
l Nhwehwɛmu a wɔyɛ no daa : Hwɛ sɛ nsɛnkyerɛnne a ɛkyerɛ sɛ asɛe, asɛe, anaasɛ asɛe anaa.
l Ahotew : Ma nhama ho ntew. Efĩ betumi ama nsu a ɛretu no aba.
l Sealant a wɔsan de di dwuma : Bere kɔ so no, sealants betumi asɛe. San fa di dwuma sɛnea ɛho hia.
l Nneɛma a wɔde sie yiye : Ma spare fittings nkɔ so wɔ baabi a ɛhɔ yɛ kusuu na ɛho tew.
Kae :
L NPT ne NPTF nhama no ma nsɔano bi ba denam interference fit a ɛwɔ ntam . thread crests ne roots .
L BSPPt nhama no de nhama no nkutoo na ɛsɔ ano, na 60° afã a ɛwɔ anim no boa wɔ nsɔano a ɛyɛ adwuma yiye mu.
L NPSM nhama de ne ho to mfiridwuma mu nkitahodi so , a mpɛn pii no wɔde gasket anaa o-ring na ɛma ɛyɛ kɛse ..
FAQS wɔ asaawa a wɔde hyɛ mu so .
Nsonsonoe titiriw a ɛda NPSM, NPTF, NPT, ne BSPT nhama ntam .
Sɛ ɛba thread fittings so a , ɛte sɛ ahodwiriwde. Afã biara hyia wɔ ɔkwan pɔtee bi so. NPSM (National Pipe Straight Mechanical) Nhama no yɛ tẽẽ na wɔayɛ ama mfiri nkwaa a ɛfata. NPT (national pipe tapered) threads are tapered and make a tight seal by fitting deeper as they are screwed in. NPTF (National Pipe Taper Fuel), a wɔsan frɛ no Dryseal American National Standard Taper Pipe Thread , no te sɛ NPT nanso wɔayɛ ama nsɔano a eye a enhia sɛ wɔde nsɔano foforo ka ho. BSPT (British Standard Pipe Taper) nhama no, wɔde yɛ nsɔano a ɛyɛ den wɔ nhyɛso nhyehyɛe mu na ɛwɔ 55° afã a ɛyɛ anim, a ɛsono 60° anim a wɔde di dwuma wɔ NPT nhama mu. Nanso,
Nneɛma a wotumi sesa, nkitahodi a nsu ntumi nkɔ mu, ne mfomso a wɔtaa yɛ .
Afei, so wubetumi de wɔn afrafra? Ɛnyɛ ankasa. Interchangeability nyɛ agodie a wopɛ sɛ wode thread fittings di agoru. Sɛ wode di dwuma NPT wɔ NPTF so a , ɛtɔ da bi a ebetumi ayɛ adwuma, nanso ɛnyɛ nea ɛyɛ nokware sɛ ɛyɛ nkitahodi a nsu ntumi nkɔ mu . bSpt Na ? Ɛyɛ asɛm foforo koraa esiane ne thread angle ne pitch soronko nti. Mfomso a ɛtaa ba sen biara? Sɛ yɛfa no sɛ wɔn nyinaa hyia. Hwɛ gyinapɛn ahorow no bere nyinaa, te sɛ ANSI/ASME B1.20.1 ma NPT, na amma nsu a ɛretu anaasɛ asɛe.
Asaawa a ɛfata a wɔbɛkyerɛ ama application pɔtee bi .
Enti, wobɛyɛ dɛn apaw nea ɛfata? Susuw adwuma no ho hwɛ. Sɛ wopɛ sɛ wode nsu ne gas kɔ a , nsɔano a nsu ntumi nkɔ mu yɛ ade titiriw. Sɛ wo ne pressure systems reyɛ adwuma a , BSPT betumi ayɛ ɔkwan a wobɛfa so. Wɔ applications a ehia mfiri seal a enni sealant, NPTF yɛ w’adamfo. Na ama mfiridwuma mu nkitahodi a wobetumi atetew mu ntɛmntɛm no, NPSM betumi ayɛ nea eye sen biara a wobetumi apaw.
FAQ afoforo a ɛfa nneɛma a ɛhaw adwene ho a ɛfa nneɛma a ɛhaw adwene ho .
l Dɛn ne sealant pa?
PTFE tape (Teflon) di dwuma ne NPT nhama de boa ma ano yɛ den. Wɔtaa de
l Ɛsɛ sɛ me screw no yɛ tight dɛn?
Kɔ ma interference fit —tight enough so thread crests and roots press together, nanso ɛnyɛ den araa ma wopopa nhama no.
l Na angles nso ɛ?
Kae sɛ NPT ne NPTF wɔ 60° afã a ɛyɛ anim , na BSPT wɔ 55° anim ..
l So metumi de saa fittings yi adi dwuma bio?
Ɛtɔ da bi a, nanso hwɛ yiye wɔ galling ho —bere a nhama no sɛe na ɛbata ho.
l Na sɛ ɛpue nso ɛ?
Hwɛ sɛ ebia asɛe anaa sɔ bonded ring seal anaa O-ring hwɛ ma ahobammɔ foforo.
Kae sɛ, sɛ wunya fit a ɛfata a, ɛte sɛ nea worepaw adwinnade a ɛfata ama adwuma no. Ne nyinaa fa nsɛm no ho. Ma saa afotu yi ntra w’adwenem, na wobɛkɔ wo kwan so akɔ mastering thread fittings for leak-free connections ..
Awie
Sɛ yɛreka thread fittings te sɛ NPSM , NPTF , NPT , ne BSPT ho asɛm a, yɛreka afã horow a ɛboa yɛn ma yɛka nsu afiri ne hose bom no ho asɛm. Saa nneɛma yi hwɛ hu sɛ yɛn nsu, gas, ne nneɛma afoforo fa nsu afiri mu a nsu nkɔ mu. Nea yɛasua ni:
L NPT yɛ bi tapered thread a wɔde di dwuma pii wɔ USA. Ɛma fit a ɛyɛ den efisɛ nhama no yɛ ketewaa wɔ n’awiei biako, te sɛ cone.
L NPTF , a wɔsan frɛ no Dryseal American National Standard Taper Pipe Thread , te sɛ NPT nanso wɔayɛ no sɛnea ɛbɛyɛ a ɛbɛyɛ nsɔano a ɛnyɛ den mpo a ɛho nhia a enhia sɛ wɔde nneɛma foforo ka ho te sɛ PTFE tape ..
L NPSM , anaa ɔman no mu paipu mfiri a ɛyɛ tẽẽ , wɔ nhama a ɛyɛ tẽẽ a wɔde fa nsu mu . Ɛyɛ papa sɛ wobɛyɛ mfiridwuma mu nkitahodi a wobetumi atetew mu na woasan de ahyɛ mu mmerɛw.
L BSPT , a ɛyɛ British Standard Pipe Taper no tiawa no te sɛ NPT nanso ɛwɔ asaawa anim ne ɛnne soronko . Ɛtaa ba wɔ mmeae a wɔde Britaniafo gyinapɛn ahorow di dwuma.
Kae sɛ, sɛ wunya fit a ɛfata a, ɛkyerɛ sɛ wubehu wo thread gyinapɛn ahorow na woapaw nea ɛfata ama wo nhyɛso nhyehyɛe ahorow ..
Nneɛma a ɛrekɔ so daakye wɔ thread fitting mfiridwuma ne nnwuma ho nyansahyɛ ahorow mu .
Wiase a ɛyɛ asaawa a wɔde hyɛ mu no kɔ so sakra. Nea ɛwɔ anim no ni:
l Nsɔano a ɛyɛ adwuma yiye no reyɛ yiye. Yɛrehwehwɛ akwan a yɛbɛfa so ayɛ nkitahodi a ɛyɛ den yiye a enhia gaskets anaa O-rings foforo ..
l nneɛma nso renya nkɔso. Eyi kyerɛ sɛ fittings betumi adi nhyɛso pii ho dwuma na akyɛ.
l abenfoɔ hyɛ nyansa sɛ bere nyinaa di nnwumayɛ ho nyansahyɛ akyi , te sɛ ANSI/ASME B1.20.1 a wɔde bedi dwuma ama NPT anaa ISO 7 ama BSPT, de ahwɛ sɛ biribiara fata pɛpɛɛpɛ.
