Nominal Pipe Size

Chii chinonzi Nominal Pipe Size?

Nominal Pipe Size(NPS)iNorth America seti yemasaizi akajairwa emapombi anoshandiswa kune yakakwirira kana yakaderera kumanikidza uye tembiricha. Iro zita rekuti NPS rakavakirwa pane yekutanga "Iron Pipe Size" (IPS) system.

Iyo IPS system yakavambwa kuratidza saizi yepombi. Saizi yacho yaimiririra dhayamita yemukati mepombi mumainch. IPS 6 ″ pombi ndiyo ine mukati medhayamita ingangoita 6 inches. Vashandisi vakatanga kudaidza pombi kuti 2inch, 4inch, 6inch pombi zvichingodaro. Kutanga, saizi imwe neimwe yepombi yakagadzirwa kuti ive nehukobvu humwe, iyo yakazodaidzwa kuti chiyero (STD) kana huremu hwese (STD.WT.). Iyo dhayamita yekunze yepombi yakagadziriswa.

Sezvinodiwa zvemaindasitiri zvinobata yakakwira dzvinyiriro yemvura, pombi dzakagadzirwa nemadziro akakora, ayo ave kuzivikanwa seakawedzera kusimba (XS) kana yakawedzera kurema (XH). Izvo zvinodiwa zvekumanikidza zvakanyanya zvakawedzera kuwedzera, nemapaipi akakora emadziro. Saizvozvo, mapaipi akagadzirwa ane kaviri akawedzera akasimba (XXS) kana maviri akawedzera anorema (XXH) madziro, nepo akamira ekunze madhayamita asina kuchinjika. Ziva kuti pane ino webhusaiti chete mazwiXS&XXSdzinoshandiswa.

Pipe Purogiramu

Saka, panguva yeIPS madziro matatu chete aishandiswa. Muna Kurume 1927, American Standards Association yakaongorora indasitiri uye yakagadzira hurongwa hwairatidza kukora kwemadziro zvichibva pamatanho madiki pakati pehukuru. Iro zita rinozivikanwa sezita rezita pombi saizi yakatsiva iron pombi saizi, uye izwi rekuti hurongwa (SCH) yakagadzirwa kuti itsanangure kukora kwemadziro epombi. Nekuwedzera nhamba dzehurongwa kumazinga eIPS, nhasi tinoziva huwandu hwemadziro emadziro, anoti:

SCH 5, 5S, 10, 10S, 20, 30, 40, 40S, 60, 80, 80S, 100, 120, 140, 160, STD, XS uye XXS.

Nominal pombi saizi (NPS) is a dimensionless designator yehukuru hwepombi. Iyo inoratidza chiyero chepombi saizi kana ichiteverwa neiyo chaiyo saizi yekududza nhamba isina inch chiratidzo. Semuenzaniso, NPS 6 inoratidza pombi ine dhayamita yekunze i168.3 mm.

Iyo NPS haina hukama zvakanyanya nedhayamita yemukati mumainch, uye NPS 12 uye pombi diki ine dhayamita rekunze rakakura kupfuura saizi yekugadzira. KuNPS 14 uye yakakura, iyo NPS yakaenzana ne14inch.

Kune NPS yakapihwa, iyo dhayamita yekunze inoramba iripo uye ukobvu hwemadziro hunowedzera nehuwandu hwehurongwa. Iyo dhayamita yemukati ichaenderana nehupamhi hwemadziro epombi inotsanangurwa nenhamba yehurongwa.

Pfupiso:
Saizi yepombi inotsanangurwa nenhamba mbiri dzisiri-dimensional,

• nominal pombi saizi (NPS)
• nhamba yehurongwa (SCH)

uye hukama huri pakati penhamba idzi hunosarudza mukati medhayamita yepombi.

Stainless Simbi Pipe zviyero zvakatemerwa neASME B36.19 inovhara kunze dhayamita uye iyo Schedule madziro ukobvu. Ziva kuti kukora kwemadziro asina tsvina kuenda kuASME B36.19 ese ane “S” suffix. Saizi isina “S” suffix ndeye ASME B36.10 inoitirwa mapaipi ecarbon steel.

Sangano reInternational Standards Organisation (ISO) rinoshandisawo system ine dimensionless designator.
Diameter nominal (DN) inoshandiswa mune metric unit system. Inoratidza saizi yepombi yakajairwa kana ichiteverwa nenhamba chaiyo yekududza saizi isina chiratidzo chemirimita. Semuenzaniso, DN 80 ndiyo yakaenzana dhizaini yeNPS 3. Pazasi petafura ine zvakaenzana neNPS uye DN pombi saizi.

Cherechedza: PaNPS ≥ 4, DN ine hukama = 25 yakapetwa nenhamba yeNPS.

Iwe zvino chii chinonzi "ein zweihunderter Rohr"? MaGermany anoreva neiyo pombi NPS 8 kana DN 200. Muchiitiko ichi, maDutch anotaura nezve "8 duimer". Ndiri kuda kuziva kuti vanhu kune dzimwe nyika vanoratidza sei pombi.

Mienzaniso yeOD chaiyo uye ID

Madhayamita chaiwo ekunze

• NPS 1 chaiyo OD = 1.5/16″ (33.4 mm)
• NPS 2 chaiyo OD = 2.3/8″ (60.3 mm)
• NPS 3 chaiyo OD = 3½” (88.9 mm)
• NPS 4 chaiyo OD = 4½” (114.3 mm)
• NPS 12 chaiyo OD = 12¾” (323.9 mm)
• NPS 14 chaiyo OD = 14 ″(355.6 mm)

Chaiyo mukati madhayamita epaipi 1 inch.

• NPS 1-SCH 40 = OD33,4 mm – WT. 3,38 mm - ID 26,64 mm
• NPS 1-SCH 80 = OD33,4 mm – WT. 4,55 mm - ID 24,30 mm
• NPS 1-SCH 160 = OD33,4 mm – WT. 6,35 mm - ID 20,70 mm

Sezvakatsanangurwa pamusoro, hapana mukati medhayamita inoenderana nechokwadi 1 ″ (25,4 mm).
Iyo dhayamita yemukati inotarirwa nemadziro emadziro (WT).

Chokwadi chaunofanira kuziva!

Schedule 40 uye 80 inoswedera kune STD neXS uye mune dzakawanda zviitiko zvakafanana.
Kubva paNPS 12 uye pamusoro pehukobvu hwemadziro pakati pechirongwa 40 neSTD zvakasiyana, kubva kuNPS 10 uye pamusoro pemadziro emadziro pakati pechirongwa 80 neXS zvakasiyana.

Chirongwa 10, 40 uye 80 mune dzakawanda zviitiko zvakafanana nehurongwa 10S, 40S uye 80S.
Asi chenjera, kubva kuNPS 12 - NPS 22 ukobvu hwemadziro mune dzimwe nguva hwakasiyana. Mapaipi ane suffix "S" ane mukati iwoyo matete matete ticknees.

ASME B36.19 haivharidzi ese ese pombi saizi. Naizvozvo, iwo madimensional anodiwa eASME B36.10 anoshanda kune Stainless simbi pombi yemasaizi uye marongero asina kuvharwa neASME B36.19.