Views: 845 Author: Sayt Ɛditɔ Pɔblish Taym: 2023-12-18 Ɔrijin: Ples
Yu de trobul we yu nɔ ɔndastand NPSM, NPTF, NPT, ɛn BSPT thread? Dis atikul go gayd yu fɔ ɔndastand dɛn trɛd ya gud gud wan, ɛn tich yu aw fɔ instɔl dɛn wit impɔtant tin dɛn fɔ tink bɔt.
NPT tinap fɔ Nashɔnal Paip Tapered . Na wan kayn tap trɛd we dɛn kin yuz fɔ jɔyn paip ɛn fitin dɛn. Na dis na wetin yu nid fɔ no:
l Tapered Threads : NPT thread dεm de taper pan wan rεt we na 1/16 inch pan wan inch, we min se dεn de sכmtεm sכmtεm tכwεd di εnd.
l Thread Standards : Dɛn de fala di ANSI/ASME B1.20.1 standad.
l Thread Angle : Di thread dɛn gɛt 60° flank angle.
l Siling Efficiency : Dɛn de mek wan mɛkanikal sil bay wan intafɛreshɔn fit bitwin di trɛd kres ɛn di rut dɛn.
NPT trɛd dɛn de ɔlsay na prɛshɔn sistɛm dɛn . Dɛn kin yuz dɛn fɔ mek shɔ se dɛn gɛt lik-fri sil insay:
l Fluid ɛn Gas Transfer : Paip dɛn we de kɛr wata, ɔyl, ɔ gas.
l Prɛshɔn Kalibreshɔn Sistɛm : Ikwipmɛnt we de mɛzhɔ prɛshɔn.
Indastri dɛn we de yuz NPT trɛd dɛn inklud:
l Fɔ mek tin dɛn
l Awtomotiv
l Erospɛs we de wok
We yu de instɔl NPT trɛd dɛn, fala dɛn bɛst we ya:
1. Yuz PTFE Tep : Rap PTFE tep (Teflon) rawnd di man trɛd fɔ mek di sil bɛtɛ.
2. Nɔ Tayt Ova : If yu tayt pasmak, i kin mek yu gɛt galling , usay di trɛd dɛn kin pwɛl.
3. Chek fɔ Lik : Ɔltɛm tɛst di kɔnɛkshɔn fɔ lik.
Di tin dɛn we dɛn kin yuz bɔku tɛm na:
l Kɔnekt Paip : Lɛk insay yu os in plaba.
l Fitin : Lɛk ɛlb ɔ ti we de ɛp fɔ chenj di dairekshɔn fɔ di flɔ.
l Leak-Free Connection : Dɛn mek dɛn fɔ mek tayt sil.
l Widely Accepted : NPT na di standad na bɔku industri dɛm.
l Risk fɔ Ɔva-Tayt : I pɔsibul fɔ pwɛl di trɛd dɛn.
l May Require Sealant : Sɔntɛnde, dɛn kin nid ɛkstra sialant fɔ mek shɔ se sial nɔ de lik.
l NPTF , ɔ Nashɔnal Paip Tɛpa Fiul , we dɛn kin kɔl bak Dryseal American National Standard Taper Pipe Thread , dɛn mek am fɔ mek i gɛt tayt sil we nɔ nid fɔ gɛt ɛkstra silin.
l NPTF trɛd dɛn gɛt smɔl difrɛn dizayn we de alaw fɔ mek dɛn gɛt mɛkanikal kɔnɛkshɔn we dɛn nɔ yuz PTFE tep ɔ ɔda silin, nɔ lɛk NPT trɛd dɛn we kin nid dɛn bɔku tɛm.
Mɛmba se, NPT na fɔ mek wan tapered paip trɛd kɔnɛkshɔn we pɔsin kin abop pan ɛn we dɛn kin yuz bɔku bɔku wan. Ilɛksɛf yu de wok pan motoka ɔ yu de fiks lik na os, fɔ no bɔt NPT trɛd dɛn de ɛp yu fɔ mek bɛtɛ kɔnɛkshɔn.
NPTF trɛd dɛn, we dɛn kin kɔl bak Dryseal American National Standard Taper Pipe Thread , de fala di ANSI B1.20.3 standad dɛn. Dɛn trɛd ya fiba NPT bɔt dɛn mek dɛn fɔ mek dɛn sidɔm bɛtɛ. NPTF trɛd dɛn gɛt 60° flank angle ɛn dɛn de mek wan mɛkanikal sil tru wan intafɛreshɔn fit bitwin di trɛd kres ɛn rut dɛn. Dis min se di trɛd dɛn kin krɔs togɛda fɔ mek tayt sil we nɔ nid ɛkstra silin.
Pan ɔl we NPT ɛn NPTF trɛd dɛn tan lɛk, dɛn dizayn difrɛn . Dɛn mek NPT trɛd dɛn ɔnda ANSI/ASME B1.20.1 , ɛn dɛn kin nid PTFE tep ɔ ɔda silin fɔ mek shɔ se dɛn gɛt kɔnɛkshɔn we nɔ gɛt lik . Na di ɔda say, dɛn mek NPTF trɛd dɛn, we de fala ANSI B1.20.3 , fɔ mek dɛn mɛsh tayt ɛn fɔm wan sil we nɔ gɛt ɛkstra matirial. Dɛn kin ebul fɔ du dis bay we dɛn mek wan dizayn we de mek di trɛd kres ɛn di rut dɛn skwash togɛda, ɛn dis kin mek wan sil we nɔ de lik.
In di wɔl fɔ fiul ɛn gas , NPTF trɛd na go-to choice. Dɛn mek dɛn fɔ mek wan sil we nɔ de lik we rili impɔtant na prɛshɔn sistɛm dɛn . Dɛn sistɛm ya nɔ kin ebul fɔ pe fɔ lik, bikɔs ivin smɔl wan kin denja. NPTF trɛd dɛn de yuz insay prɛshɔn kalibreshɔn sistɛm ɛn pat dɛn usay fɔ kip di klin ɛn intɛgriti fɔ di fluid ɔ gas impɔtant.
Bɔku tɛm dɛn kin si NPTF trɛd dɛn na aplikeshɔn usay i impɔtant fɔ mek dɛn gɛt sil we nɔ gɛt lik , ɛn dɛn nɔ want ɛni silin. Bɔt pan ɔl we sɔm tɛm dɛn kin miks NPTF ɛn NPT trɛd dɛn, dis nɔ kin sef ɔ i kin wok ɔltɛm. NPTF trɛd dɛn kin skru insay NPT fitin, bɔt di rivays nɔ kin sial fayn bikɔs dɛn mek NPTF fɔ fit klos. I impɔtant fɔ chɛk kɔmpitibiliti bifo yu miks dɛn fɔ avɔyd tin dɛn lɛk galling ɔ improper sial.
NPSM trɛd na wan kayn strɛch paip trɛd . Dɛn de fala di ANSI/ASME B1.20.1 standad dɛn. Dɛn mek dɛn trɛd dɛn ya fɔ mek dɛn kɔnɛkshɔn wit mashin pas fɔ mek dɛn mek sil. Dɛn gɛt 60° flank angle ɛn dɛn min fɔ yuz wit gasket ɔ O-ring fɔ mek kɔnɛkshɔn we nɔ gɛt lik.
Ki pɔynt dɛn bɔt NPSM trɛd dɛn: - Dɛn paralel , we min se di dayamita kɔnsistɛns. - NPSM trɛd dɛn nɔ de taper lɛk NPT (National Pipe Tapered) trɛd dɛn. - Dɛn kin yuz dɛn fɔ mek mɛkanikal kɔnɛkshɔn . - Sial efyushɔn de kɔmɔt frɔm gasket, nɔto di trɛd dɛnsɛf.
Bɔku tɛm dɛn kin si NPSM trɛd dɛn na haydrolik sistɛm usay wan sil we nɔ gɛt lik impɔtant. Dɛn kin wok fayn na prɛshɔn sistɛm lɛk prɛshɔn kalibreshɔn sistɛm . Di Female Pipe Swivel fittings na kɔmɔn wit NPSM threads, we de alaw fɔ izi fɔ instɔl na tayt ples.
Ideal yus kes dɛm inklud: - Usay mɛkanikal sil impɔtant pas trɛd sil. - Sistem dɛn we nid fɔ disassembly ɛn riassembly bɔku tɛm. - We yu de yuz gasket ɔ O-ring na in dɛn kin lɛk pas trɛd silin.
Sɔntɛnde dɛn kin kɔnfyus NPSM wit NPTF (National Pipe Taper Fuel), we dɛn kin kɔl bak Dryseal American National Standard Taper Pipe Thread . Na dis na aw dɛn kɔmpia:
l NPTF trɛd dɛn fɔ mek dɛn gɛt Dɛn mek sil we nɔ gɛt lik we nɔ nid fɔ gɛt ɔda silin dɛn. Dɛn kin mek wan intafɛreshɔn fit bitwin di trɛd kres ɛn di trɛd rut dɛn.
l NPSM trɛd dɛn nid gasket ɔ O-ring fɔ mek shɔ se kɔnɛkshɔn nɔ de lik.
l NPSM nɔ de intachɛnj wit NPTF ɔ NPT bikɔs ɔf difrɛn trɛd standad dɛn.
NPSM trɛd dɛn valyu fɔ dɛn siling efyushɔn we dɛn yuz am wit wan prɔpa mɛkanikal sil . Dɛn kin yuz dɛn bɔku bɔku wan fɔ: - Fluid ɛn gas transfa aplikeshɔn. - Indastri dɛm we nid mɛkanikal kɔnɛkshɔn we pɔsin kin abop pan.
Di aplikeshɔn dɛn na di industri inklud: - Wata ɛn west wata tritmɛnt. - Nyumatik sistem dɛn. - Lubrikɛshɔn sistem dɛn.
We wi de tɔk bɔt BSPT trɛd , wi de dayv insay wan wɔl we gɛt paip ɛn kɔnɛkshɔn dɛn we impɔtant fɔ transfa fluid ɛn gas . BSPT tinap fɔ British Standart Paip Taper . Na wan kayn trɛd we dɛn kin yuz fɔ mek sil we nɔ de lik . Dis standad de autlayn insay dɔkyumɛnt dɛn lɛk BS 21 ɛn ISO 7.
BSPT trɛd dɛn na wan kayn tin. Dɛn gɛt 60° flank angle ɛn dɛn tayp, we min se dɛn kin smɔl as dɛn de go dip. Dis difrɛn frɔm NPT trɛd , we dɛnsɛf tayp bɔt gɛt 60° trɛd angul we dɛn kin yuz na Amɛrika, lɛk aw ANSI/ASME B1.20.1 dɔn difayn am.
Naw, lɛ wi kɔmpia BSPT wit NPTF . NPTF, ɔ Nashɔnal Paip Tɛpa Fiul , we dɛn kin kɔl Dryseal American National Standard Taper Pipe Thread , as per ANSI B1.20.3 , dɛn mek am fɔ tayt sil pas NPT. I de ajɔst dis bay we i de mek wan intafɛreshɔn fit bitwin di trɛd kres ɛn di trɛd rut dɛn . BSPT nɔ de abop pan dis fit fɔ sial. Bifo dat, i kin nid fɔ gɛt trɛd silin lɛk PTFE tep (Teflon) ɔ gasket fɔ mek i nɔ lik.
Dɛn kin yuz BSPT trɛd bɔku bɔku wan ausayd Amɛrika, mɔ na kɔntri dɛn we de fala di British injinɛri standad. Bɔku tɛm dɛn kin si dɛn na prɛshɔn sistɛm ɛn prɛshɔn kalibreshɔn sistɛm . Di ebul we dɛn ebul fɔ mek wan mɛkanikal sil de mek dɛn fayn fɔ bɔku intanashɔnal aplikeshɔn dɛn.
We wi luk BSPT nia ɔda kayn trɛd dɛn lɛk NPSM (National Pipe Straight Mechanical) ɛn BSPP (British Standard Parallel Pipe) , wi si se BSPT na fɔ mek kɔnɛkshɔn we nɔ gɛt lik insay tap trɛd, we NPSM ɛn BSPP na fɔ stret paip trɛd . BSPT thread dεm de mek mεkanikal kכnεkshכn we nכ nid bכnd ring sil כ O-ring , nכ lεk BSPP we kin nid dεn ya fכ sial.
BSPT trɛd dɛn fayn fɔ sityueshɔn dɛn usay yu nid wan sɔlid, lik-fri sil we nɔ gɛt di kɔmplisiti fɔ ɔda sial we dɛn de yuz. Dɛn simpul fɔ yuz pas NPTF trɛd , we nid prɛsis prɛshɔn kalibreshɔn fɔ avɔyd prɔblɛm dɛn lɛk galling ɔ damej frɔm ɔva-tayt.
We wi de tɔk bɔt trɛd fitin lɛk NPSM, NPTF, NPT, ɛn BSPT, na ɔltin bɔt aw dɛn kin kɔnɛkt ɛn sial paip dɛn. Dɛn thread standad ya de ɛp wi fɔ mek shɔ se tin dɛn fit togɛda rayt. Tink bɔt am lɛk LEGO blɔk – dɛn nid fɔ mach pafɛkt wan fɔ stik togɛda.
l NPSM ɛn NPS gɛt stret trɛd, we min se dɛn nɔ de tayt as dɛn de skru insay.
l NPT , NPTF , ɛn BSPT na taper. Dis min se dɛn kin tayt, kayn lɛk fɛnɛl, we kin ɛp fɔ stɔp lik.
Di Amɛrikan Nashɔnal Stɛndad Instityut (ANSI) de sɛt lɔ fɔ dɛn trɛd ya na di US Fɔ ɛgzampul, ANSI/ASME B1.20.1 na fɔ NPT trɛd dɛn. Dɛn kin tɛl wi aw big di trɛd dɛn fɔ bi, ɔmɔs de insay wan inch (dat na di trɛd kɔnt), ɛn di shep we dɛn nid fɔ gɛt.
Matirial dɛn impɔtant pasmak. Bɔku pan di fitin dɛn na mɛtal, lɛk stɛl ɔ bras, bikɔs dɛn strɔng. Di we aw dɛn mek dɛn pat ya de fala strikt lɔ dɛn fɔ mek shɔ se dɛn sef ɛn dɛn go las fɔ lɔng tɛm. Dis na bɔt fɔ fala di lɔ – lɛk fɔ fala wan risɛp fɔ bek wan pafɛkt kek ɛvri tɛm.
l ANSI B1.20.3 ɛn AS 1722.1 na sɔm pan di standad dɛn we de gayd aw fɔ mek trɛd fɔ prɛshɔn sistɛm.
l Na di UK, dɛn de yuz BS 21 ɛn ISO 7 fɔ BSPT ɛn BSPP trɛd.
Di wan dɛn we de mek di tin dɛn fɔ mek shɔ bak se dɛn trɛd dɛn kin ebul fɔ bia wit di prɛshɔn we dɛn fɔ gɛt ɛn nɔ lik ɔ brok. Na de kwaliti ashurans de kam in.
Di dimɛnshɔn dɛn we di trɛd dɛn gɛt na di pitch (aw di trɛd dɛn de fa frɔm dɛnsɛf) ɛn di angul we di trɛd dɛn gɛt. Fɔ ɛgzampul, BSPT trɛd dɛn gɛt 60° flank angle , we na pat pan wetin mek dɛn spɛshal.
l Tolerans na di smɔl difrɛns dɛn we dɛn alaw pan di sayz ɛn shep fɔ di trɛd dɛn. Dem lek di wiggle rum in fit pies togeda.
l Kwaliti ashurans min fɔ chɛk ɛvri pat fɔ mek shɔ se i mit di standad. I tan lɛk se ticha de gred yu homwok fɔ mek shɔ se yu gɛt di ansa dɛn rayt.
Fɔ sil we nɔ gɛt lik , PTFE tep (Teflon) , gasket , ɔ O-ring wit dɛn trɛd ya. dɛn kin yuz pat dɛn lɛk bכku tεm tεr dεm we t כp lεk NPT εn BSPT kin sial pan dεn wan biכs fכ dεn shep – dεn kin tayt εn tayt as dεn de skru insay.
l di NPT trɛd dɛn fɔ bi Dɛn mek intafɛreshɔn fit , we min se dɛn kin mek mɛkanikal sil bay we dɛn de swɛt togɛda.
l NPSM trɛd dɛn de wok wit uman paip swivel – wan kayn nat we de mek yu skru am pan we yu nɔ twist di wan ol paip.
l NPTF trɛd dɛn Sɔntɛnde dɛn kin kɔl Dryseal American National Standard Taper Pipe Thread bikɔs dɛn min fɔ sial we dɛn nɔ nid ɛkstra tin lɛk tep ɔ paste.
We i kam pan trɛd fitin dɛn we dɛn kin yuz na prɛshɔn sistɛm , di ditil dɛn impɔtant. Lɛ wi luk aw dɛn de yuz dɛn trɛd ya na di rial wɔl.
NPT trɛd dɛn kin de bɔku tɛm na jenɛral industrial aplikeshɔn dɛn. Fɔ ɛgzampul, wan manifakta fɔ prɛshɔn kalibreshɔn sistem kin yuz NPT fitin bikɔs dɛn kin kɔmpit wit bɔku bɔku ikwipmɛnt dɛn.
NPTF trɛd dɛn , we dɛn kin kɔl bak Dryseal American National Standard Taper Pipe Thread , dɛn mek am fɔ mek i gɛt mɔ sikrit, lik-fri sil we nɔ nid fɔ gɛt ɛkstra trɛd silin . Dɛn kin yuz dɛn na aplikeshɔn usay mɛkanikal sil impɔtant, lɛk insay fiul dispɛns ikwipmɛnt.
NPSM trɛd , ɔ Nashɔnal Paip Stret Mɛkanikal , dɛn kin yuz am wit uman paip swivel . Wan kes stɔdi kin involv wan haydrolik sistem usay NPSM fitin dɛn de alaw fɔ mek i izi fɔ gɛda ɛn mentenɛns.
BSPT threads , wit dɛn 60° flank angle , na kɔmɔn tin na intanashɔnal aplikeshɔn dɛn. Bɔku tɛm dɛn kin pik dɛn fɔ dɛn silin efyushɔn na fluid ɛn gas transfɔm sistɛm.
Lɛ wi brok di difrɛns dɛn:
l NPT vs. NPTF : Dɛn tu gɛt tayp paip trɛd , bɔt NPTF de gi intafɛreshɔn fit bitwin di trɛd kres ɛn trɛd rut , we de mek dɛn nɔ nid fɔ gɛt silin.
l NPSM vs. NPT : NPSM gɛt stret paip trɛd ɛn i nid gasket ɔ O-ring fɔ mek kɔnɛkshɔn we nɔ gɛt lik . NPT in tapered thread dεm de fכm wan sil bay di thread dεm sεf.
l BSPT in Yunik Pozishɔn : BSPT trɛd dɛn tan lɛk NPT bɔt dɛn gɛt difrɛn trɛd angle ɛn pitch , we de mek dɛn nɔ kin chenj wit NPT fitin dɛn.
Di wan dɛn we sabi bɔt di industri kin tɔk se yu fɔ yuz PTFE tep (Teflon) ɔ wan bond ring sil wit NPT fitin fɔ mek shɔ se yu gɛt lik-fri sil . Fɔ NPTF, i impɔtant fɔ mek shɔ se dɛn ɛnjɔy di rayt we fɔ tek advantej pan in draysil wok.
We yu de wok wit BSPT kɔnɛkshɔn , mɛmba se dɛn nɔ kɔmpitabl wit NPT ɔ NPTF we nɔ gɛt adapt. Di masta sabi pipul dɛn advays fɔ chɛk di trɛd standad dɛn lɛk ANSI/ASME B1.20.1 fɔ NPT, ANSI B1.20.3 fɔ NPTF, ɔ ISO 7 ɛn BS 21 fɔ BSPT fɔ mek shɔ se dɛn fit am fayn.
Galling , ɔ trɛd damej, na risk wit dɛn fitin ya. Fɔ mek i nɔ apin, nɔ ɛva tayt pasmak ɛn fala di prɛshɔn sistɛm dɛn spɛsifikɛshɔn ɔltɛm.
We yu de instɔl NPSM , NPTF , NPT , ɔ BSPT fitin dɛn, i impɔtant fɔ fala sɔm patikyula gaydlayn dɛn fɔ mek shɔ se kɔnɛkshɔn we nɔ gɛt lik . Na dis na wan kwik gayd:
l NPT ɛn NPTF : .
l Put PTFE tep ɔ wan fayn trɛd silin pan di man trɛd.
l Tayt di fitin wit an, dɔn yuz rench fɔ di las tɔn dɛn.
l Tek tɛm mek yu nɔ tayt pasmak, bikɔs dis kin pwɛl di trɛd dɛn.
l BSPT we de na di : .
l Semweso lɛk NPT, yuz PTFE tep ɔ trɛd silin.
l Tayt fayn fayn wan fɔ mek yu gɛt mɛkanikal sil.
l NPSM : di .
l Dɛn mek dɛn trɛd ya fɔ mek dɛn mared wit uman paip swivel.
l Yuz gasket ɔ O-ring fɔ sial.
l Nɔ tayt pasmak, bikɔs i kin mek di gasket pwɛl.
l Krɔs-threading : I kin apin we di trɛd dɛn nɔ alaynɛd. Ɔltɛm stat wit an fɔ mek i nɔ apin.
l Galling : Metal-to-metal kɔntakt kin mek dis. Yuz lɔbrik fɔ avɔyd am.
l If yu tayt pasmak : I kin mek di trɛd pwɛl. Fɔ fala di prɛshɔn kalibreshɔn sistɛm dɛn gaydlayn fɔ di rayt tɔk.
l Lik : If lik apin, chɛk fɔ aut ɔf rawnd ɛn mek shɔ se di trɛd ɛnjɔy fayn fayn wan.
l Inspekshɔn ɔltɛm : Chek fɔ sayn dɛn we de sho se i dɔn west, i dɔn rɔtin, ɔ i dɔn pwɛl.
l Klin : Kip di trɛd dɛn klin. Dɔti kin mek pɔsin lik.
l Riaplikeshɔn fɔ Silan : As tɛm de go, di silin dɛn kin pwɛl. Riaplay as nid de.
l Fɔ kip di tin dɛn fayn fayn wan : Kip di spay fitin dɛn na say we dray ɛn klin.
Mɛmba :
l NPT ɛn NPTF trɛd dɛn de mek wan sil bay wan intafɛreshɔn fit bitwin di trɛd kres ɛn di rut dɛn.
l BSPT trɛd dɛn de sial bay di trɛd dɛn nɔmɔ, wit di 60° flank angle we de ɛp fɔ sial efyushɔn.
l NPSM thread dεm de dip pan wan mεkanikal kכnεkshכn , bכku tεm dεn kin εnhans wit gasket כ O-ring.
We i kam pan trɛd fitin , i tan lɛk pɔzl. Ɛni wan pan di pat dɛn fit insay wan patikyula we. NPSM (National Pipe Straight Mechanical) trɛd dɛn stret ɛn dɛn mek am fɔ fri-fit mɛkanikal jɔyn dɛn. NPT (National Pipe Tapered) trɛd dɛn kin tay ɛn mek tayt sil bay we dɛn fit dɛn dip as dɛn de skru dɛn insay NPTF (National Pipe Taper Fuel), we dɛn kin kɔl bak Dryseal American National Standard Taper Pipe Thread , tan lɛk NPT bɔt dɛn mek am fɔ mek i gɛt bɛtɛ sil we nɔ nid ɛkstra silan. BSPT (British Standard Pipe Taper) trɛd, na di ɔda say, dɛn kin yuz fɔ mek tayt sil na prɛshɔn sistɛm ɛn dɛn gɛt 55° flank angle, we difrɛn frɔm di 60° angle we dɛn kin yuz na NPT trɛd.
Naw, yu kin miks dɛn? Nɔto fɔ tru. Interchangeability nɔto gem we yu want fɔ ple wit thread fittings. Yuz NPT wit NPTF kin wok sɔmtɛm, bɔt i nɔ gɛt garanti fɔ bi kɔnɛkshɔn we nɔ gɛt lik . Ɛn BSPT ? Na wan ol difrɛn stori bikɔs ɔf in yon trɛd angle ɛn pitch. Di mistek we dɛn kin mek pas ɔl? Assuming se dɛn ɔl fit togɛda. Ɔltɛm chɛk di standad, lɛk ANSI/ASME B1.20.1 fɔ NPT, fɔ avɔyd lik ɔ damej.
So, aw yu go pik di rayt wan? Tink bɔt di wok we yu de du. Fɔ transfa fluid ɛn gas , wan sil we nɔ gɛt lik na di men tin. If yu de wok wit prɛshɔn sistɛm , BSPT kin bi di we fɔ go. Fɔ aplikeshɔn dɛn we nid mɛkanikal sil we nɔ gɛt silin, NPTF na yu padi. Ɛn fɔ wan mɛkanikal kɔnɛkshɔn we dɛn kin tek apat izi wan, NPSM kin bi di bɛst tin fɔ pik.
l Wetin na gud silin?
Bɔku tɛm dɛn kin yuz PTFE tep (Teflon) wit NPT trɛd fɔ ɛp fɔ sidɔm.
l Aw tayt a fɔ skru dɛn?
Go fɔ wan intafɛreshɔn fit —tayt so dat di trɛd kres ɛn di rut dɛn go prɛs togɛda, bɔt nɔto so tayt dat yu go pul di trɛd dɛn.
l Wetin bɔt angul dɛn?
Mɛmba se, NPT ɛn NPTF gɛt 60° flank angle , ɛn BSPT gɛt 55° angle.
l A kin yuz dɛn fitin ya bak?
Sɔntɛnde, bɔt wach fɔ galling —we trɛd dɛn west ɛn stik togɛda.
l Wetin yu go du if i lik?
Chek fɔ si if i dɔn pwɛl ɔ tray fɔ yuz bonded ring sil ɔ wan O-ring fɔ gɛt ɛkstra layt fɔ protɛkshɔn.
Mɛmba se fɔ fit di rayt tin tan lɛk we yu pik di rayt tin fɔ di wok. Na ɔltin bɔt di ditil dɛn. Kip dɛn advays ya na yu maynd, ɛn yu go de na yu rod fɔ masta tred fitin fɔ kɔnɛkshɔn we nɔ gɛt lik.
We wi de tɔk bɔt trɛd fitin lɛk NPSM , NPTF , NPT , ɛn BSPT , wi de tɔk bɔt di pat dɛn we de ɛp wi fɔ jɔyn paip ɛn hos togɛda. Dɛn fitin dɛn ya de mek shɔ se wi wata, gas, ɛn ɔda tin dɛn de muf tru paip dɛn we nɔ de lik. Na dis na wetin wi dɔn lan:
l NPT na wan kayn tapered thread we dɛn kin yuz bɔku na USA. I kin mek i fit tayt bikɔs di trɛd dɛn kin smɔl na wan ɛnd, i kin tan lɛk kɔn.
l NPTF , we dɛn kin kɔl bak Dryseal American National Standard Taper Pipe Thread , tan lɛk NPT bɔt dɛn mek am fɔ mek wan ivin tayt lik-fri sil we nɔ nid ɛkstra tin lɛk PTFE tep.
l NPSM , ɔ Nashɔnal Paip Stret Mɛkanikal , gɛt stret paip trɛd dɛn . I fayn fɔ mek mɛkanikal kɔnɛkshɔn we dɛn kin tek apat ɛn put bak togɛda izi wan.
l BSPT , we shɔt fɔ British Standard Pipe Taper , tan lɛk NPT bɔt i gɛt difrɛn trɛd angle ɛn pitch . I kɔmɔn na ples dɛn we de yuz British standad.
Mɛmba se fɔ gɛt di rayt fit min fɔ no yu trɛd standad ɛn pik di rayt kayn fɔ yu prɛshɔn sistɛm dɛn.
Di wɔl fɔ fitin trɛd de kɔntinyu fɔ chenj. Na dis na wetin de na di ɔrayzin:
l Sial efyushɔn de kam bɛtɛ. Wi de fain we fɔ mek kɔnɛkshɔn we supa tayt we nɔ nid ɛkstra gasket ɔ O-ring.
l Matirial dɛn de impɔtant, bak. Dis min se fitin dɛn kin ebul fɔ handle mɔ prɛshɔn ɛn las fɔ lɔng tɛm.
l Ɛkspɛkt dɛn se fɔ fala ɔltɛm di industri rɛkɛmɔndeshɔn dɛn , lɛk fɔ yuz ANSI/ASME B1.20.1 fɔ NPT ɔ ISO 7 fɔ BSPT, fɔ mek shɔ se ɔltin fit jɔs rayt.
