Waihiko Waihiko Hononga Mana Toa NPT Hononga / Kaiwhakauru
Whakataki Hua
Tohu toa NPT tūhono i te iti rawa he NPT miro tane, wahine ranei hono mutunga i roto i te tūhono, NPT he American National putorino miro tapered, hoki e mohiotia ana ANSI / ASME B1.20.2M miro putorino.
Kei raro iho nga ahuatanga o te miro NPT:
1.Ko te tapahi o nga pakiaka me nga pito o te miro he papatahi
2.60° koki miro
3.Ko te koki i waenga i te taper me te tuaka pokapū o te miro paipa ko te 1°47'24”
4.Te miro te ine i ia inihi.
Na te mea he papatahi te tapahi miro NPT o nga pakiaka me nga pito o te miro, he rereke ki te NPTF, na me whakamahi he riipene hiri PTFE hei whakarite i te hiri kore-kore, katahi ka hoatu he hiri whai hua mo nga hononga ki te whakamahi i nga wai waipēhi.
Ko nga rahi o te miro NPT mo nga hononga Winner ko: 1/8"-27, 1/4"-18, 3/8"-18, 1/2"-14, 3/4"-14, 1"-11.5, 1.1/ 4”-11.5, 1.1/2”-11.5, 2”-11.5.
Me pehea te tautuhi he miro NPT me te whakatau i te rahi o te miro?
1.Tirohia te miro a he taper, whakamahia he caliper ranei te ine i te diameter o waho o te miro o waho, te iti ranei o te diameter o te miro o roto ki te rereke te roa o te waahi ka kitea he rereke te diameter ka tutuki ki te 1:16 taper, ka whakamahi tika ranei i te 1:16 mehua tohu.
2.Whakamahia he caliper ine te diameter o te turanga raina turanga.Inehia te diameter o te miro ki te kaitapa ID/OD, ka inehia te diameter miro o waho ki te diameter o waho, me te pupuri i te kaitapa ki te koki paku mo te panui tika ake, na te mea ka inehia te miro o roto ki te diameter o roto, ka mau ki te taha te miro mo te panui wahine tika ake.
3. Inehia nga miro mo ia inihi (TPI), te pitch ranei.I te mea ko te ine ine te whanui me te whakamahi i te ine piro hononga, whakamatauhia nga momo miro rereke kia kitea ra ano te pai rawa atu, uru atu ki te maha o nga miro ka taea, ka nui ake nga miro kua uru, ka tika ake te panui.Puritia te urunga/hononga me te ine puri miro ki runga ki te marama, rapua nga aputa i waenga i te ine me te miro, he maamaa ake te kite i runga i te urunga/honohono miro o waho atu i te urunga/honohono miro o roto.Te ine tika ranei i te tawhiti o te tihi o nga miro e rua
na te mea ka nui ake i te kotahi te rahi ka rite nga rahi miro.Kei raro ko nga raraunga whakatairite i waengaNKo te miro PT me te miro BSPT, he rite tonu, na me tupato kei uru, kei pohehe ranei.
| Rahi | NPT miro (60°) | Miro BSPT（55°） | ||||||
| miro | turanga OD | turanga | miro | miro | turanga OD | turanga | miro | |
| -2 | Z1/8″x27 | 10.242 | 4.102 | 27 | R1/8″x28 | 9.728 | 4 | 28 |
| -4 | Z1/4″x18 | 13.616 | 5.785 | 18 | R1/4″x19 | 13.157 | 6 | 19 |
| -6 | Z3/8″x18 | 17.055 | 6.096 | 18 | R3/8″x19 | 16.662 | 6.4 | 19 |
| -8 | Z1/2″x14 | 21.224 | 8.128 | 14 | R1/2″x14 | 20.955 | 8.2 | 14 |
| -12 | Z3/4″x14 | 26.569 | 8.618 | 14 | R3/4″x14 | 26.441 | 9.5 | 14 |
| -16 | Z1″x11.5 | 33.228 | 10.16 | 11.5 | R1″x11 | 33.249 | 10.4 | 11 |
| -20 | Z1.1/4″x11.5 | 41.985 | 10.668 | 11.5 | R1.1/4″x11 | 41.91 | 12.7 | 11 |
| -24 | Z1.1/2″x11.5 | 48.054 | 10.668 | 11.5 | R1.1/2″x11 | 47.803 | 12.7 | 11 |
| -32 | Z2″x11.5 | 60.092 | 11.065 | 11.5 | R2″x11 | 59.614 | 15.9 | 11 |
Ko te whakakikorua o te Winner o nga hononga he kore utu o Cr6+, a ko te mahi tiaki waikura i tae ki te 360h kaore he waikura whero, he nui atu i te paerewa noa.
Tau Hua
| NPT tane |  1N |  1N9 |  AN |  1NO |  1NO9-OG |  1NP |  1NT | |
 4N |  4NN | |||||||
 1CN, 1DN |  1CN9, 1DN9 |  1FN |  1FN9 |  1JN |  1JN9 |  1JN9-L |  1JN9-LL | |
 1KN |  1SN |  6NJ |  6NJ-LN | |||||
 AJJN |  AJNJ |  AFFN |  EJNJ | |||||
 2NB |  2NF |  2NJ |  2NJ9 |  2NU |  2NU9 |  2NU9-L | ||
 5N |  5KORE |  5NB |  5NT | |||||
| NPT wahine |  5BN |  5GN |  5HN-N |  5JN |  5JN9 |  5JN-BH |  5JN-BHLN | |
 5ON |  5TN-SP |  7N |  7N9-PK |  7NU-S |  9N-KAPO | |||
 GN-PK |  HN |  JN |  KN |  LN | ||||
 HNNJ |  JNJN |  KJNJ |  KJNN |  LJJN |  LJNN |