SCH (Nomero y'ingengabihe) ni iki?

SCH isobanura "Gahunda," ni uburyo bwo kubara bukoreshwa muri American Standard Pipe System kugira ngo bugaragaze ubunini bw'inkuta. Ikoreshwa hamwe na nominal diameter (NPS) kugira ngo itange amahitamo y'ubunini bw'inkuta ku miyoboro y'ingano zitandukanye, byoroshya igishushanyo mbonera, gukora no guhitamo.

 

SCH ntabwo yerekana neza ubugari bw'inkuta ahubwo ni uburyo bwo gupima bujyanye n'ubugari bw'inkuta runaka binyuze mu mbonerahamwe zisanzwe (urugero, ASME B36.10M, B36.19M).

 

Mu ntangiriro z'iterambere risanzwe, hatanzwe formula igereranyijwe kugira ngo isobanure isano iri hagati ya SCH, igitutu, n'imbaraga z'ibikoresho:
SCH ≈ 1000 × P / S
Aho:
P — Igitutu cy'igishushanyo (psi)
S — Imihangayiko yemewe y'ibikoresho (psi)

 

Nubwo iyi formula igaragaza isano iri hagati y’imiterere y’ubugari bw’urukuta n’imiterere y’ikoreshwa, mu guhitamo nyako, agaciro k’ubugari bw’urukuta gakwiye kugaragazwa n’imbonerahamwe zisanzwe.

 

Inkomoko n'amahame bifitanye isano ya SCH (Nomero y'ingengabihe)

Sisitemu ya SCH yashyizweho bwa mbere n'Ikigo cy'Igihugu cy'Ubuziranenge cya Amerika (ANSI) hanyuma yemezwa n'Umuryango w'Abanyamerika w'Abahanga mu by'Ubumenyi bw'Imashini (ASME), yashyizwe mu byiciro bya B36, kugira ngo yerekane isano iri hagati y'ubugari bw'urukuta rw'imiyoboro n'umurambararo w'imiyoboro.

 

Muri iki gihe, amahame akoreshwa cyane arimo:

ASME B36.10M:
Ikoreshwa ku miyoboro y'icyuma cya karuboni n'icyuma cya alloy, itwikiriye SCH 10, 20, 40, 80, 160, n'ibindi;

ASME B36.19M:
Ikoreshwa ku miyoboro y'icyuma kidashonga, harimo n'imiyoboro yoroheje nka SCH 5S, 10S, 40S, n'ibindi.

 

Gushyira ahagaragara imibare ya SCH byakemuye ikibazo cy’ubugari bw’inkuta butari busanzwe mu bunini butandukanye bw’ibipimo, bityo imiterere y’imiyoboro ihinduka.

 

Ni gute SCH (nimero y'ingengabihe) igaragazwa?

Mu bipimo ngenderwaho by’Abanyamerika, imiyoboro ikunze kugaragazwa hakoreshejwe imiterere ya “NPS + SCH,” nka NPS 2" SCH 40, yerekana umuyoboro ufite umurambararo wa santimetero 2 n’ubugari bw’urukuta bujyanye n’ibipimo ngenderwaho bya SCH 40.

NPS: Ingano y'umuyoboro w'amazina, upimwe muri santimetero, atari umurambararo w'inyuma nyawo ahubwo ni ikimenyetso cy'ingano gisanzwe cy'inganda. Urugero, umurambararo w'inyuma nyawo wa NPS 2" ni hafi milimetero 60.3.

SCH: Ubunini bw'urukuta, aho imibare myinshi igaragaza inkuta nini, bigatuma imiyoboro ikomera cyane kandi ikanarwanya umuvuduko.

Dukoresheje urugero rwa NPS 2" , ubunini bw'inkuta ku mibare itandukanye ya SCH ni ubu bukurikira (ibipimo: mm):

SCH 10: 2.77 mm
SCH 40: 3.91 mm
SCH 80: 5.54 mm

 
【Icyitonderwa cy'ingenzi】
— SCH ni ikimenyetso gusa, ntabwo ari igipimo cy’ubugari bw’urukuta mu buryo butaziguye;
— Imiyoboro ifite imiterere imwe ya SCH ariko ingano zitandukanye za NPS zifite ubugari butandukanye bw'inkuta;
— Uko igipimo cya SCH kiri hejuru, ni ko urukuta rw'umuyoboro rurushaho kuba runini kandi igipimo cy'umuvuduko gikwiye kikaba kinini.