Tlhaloso ea NPT ke eng?

NPT e emetse National Pipe Taper, e leng tekanyetso ea US bakeng sa likhoele tse tapered tse sebelisoang liphaepheng le liphaepheng molemong oa ho tiisa. Likhoele tsa NPT li etselitsoe ho fana ka tiiso e sa lutleng ha e sebelisoa ka sealant sa khoele, joalo ka tepi ea Teflon kapa pipe dope. Theipi khoeleng ea NPT e e lumella ho etsa tiiso ha e kopanngoa le khoele e 'ngoe e tapered.

Litšobotsi tsa bohlokoa tsa likhoele tsa NPT li kenyelletsa:

1. Taper:Bophara ba ka ntle (OD) ba khoele bo fokotseha hanyane ho tloha qalong ho isa qetellong ea khoele. Taper ena, eo hangata e leng 1/16 inch ka inch, e thusa ho theha tiiso e tiileng ha likarolo li ntse li tiisa hammoho.

2. Tsela ea Khoele: Likhoele tsa NPT li na le khoele ea khoele ea 60-degree, e ts'oanang le litekanyetso tse ling tse ngata tsa li-screw thread, empa sebopeho le sebaka sa ho arohana li etselitsoe ho hokahanya liphaephe.

3. Pitch: Pitch (palo ea likhoele ka inch) e fapana ho latela boholo ba phala ka lebitso. Ka mohlala, NPT ea 1/8-inch e na le likhoele tse 27 ka inch, ha 2-inch NPT e na le likhoele tse 11.5 ka inch.

4. Tiiso:Ho netefatsa tiiso e nepahetseng, ho lokela ho sebelisoa sekoahelo sa khoele. Ntle le eona, ho na le menyetla e mengata ea ho lutla hobane ho kopana ha tšepe le tšepe feela ha ho etse tiiso e lekaneng.

5. Ho tiisa Matsoho:Likhoele tsa NPT li lokela ho tiisetsoa ka letsoho pele, ebe li fuoa thinya e eketsehileng ka sekoahelo ho fihlela tiiso e nepahetseng. Palo ea liphetoho tse eketsehileng e itšetlehile ka boholo ba se loketseng le thepa; ka kakaretso, 1.5 ho 3.5 retelehela ka nģ'ane ho monwana tighten ba kgothaletswa.

Likhoele tsa NPT li sebelisoa hangata ho liphaephe tsa metsi, li-hydraulic, le li-pneumatic system, har'a tse ling, moo khokahano e sireletsehileng, e sa luleng e hlokahalang. Ho boetse ho na le mofuta o omileng oa tiiso o bitsoang NPTF (National Pipe Taper Fuel) e etselitsoeng ho fana ka tiiso ea mochini ntle le tlhoko ea sealant e arohaneng, leha lits'ebetso tse ling li ntse li hloka setiiso bakeng sa ts'ireletso e eketsehileng.

Bakeng sa lipotso tse ling tse amanang le lisebelisoa tsa NPT kapa lethathamo la lihlahisoa tsa rona, ka kopo ikopanye le rona.