Waa maxay SCH (Lambarka Jadwalka)?

SCH waxa ay u taagan tahay "Jadwalka", kaas oo ah nadaamka lambaraynta ee lagu isticmaalo Nidaamka Tuubooyinka Heerka Ameerika si loo muujiyo dhumucda gidaarka. Waxa lala isticmaalaa dhexroorka magacaaban (NPS) si loo bixiyo ikhtiyaarada dhumucda gidaarka caadiga ah ee tubooyinka cabbirka kala duwan, fududaynta naqshadaynta, soo saarista, iyo xulashada.

 

SCH si toos ah uma tilmaamayso dhumucda gidaarka laakiin waa nidaam darajooyin u dhigma dhumucda gidaarada gaarka ah iyada oo loo marayo miisaska caadiga ah (tusaale, ASME B36.10M, B36.19M).

 

Marxaladihii hore ee horumarinta caadiga ah, qaacido qiyaas ah ayaa la soo jeediyay si loo qeexo xidhiidhka ka dhexeeya SCH, cadaadiska, iyo xoogga alaabta:
SCH ≈ 1000 × P / S
Halkee:
P - Cadaadiska naqshadeynta (psi)
S - Cadaadiska la oggol yahay ee walxaha (psi)

 

Inkasta oo qaaciddani ay ka tarjumayso xidhiidhka ka dhexeeya naqshadaynta dhumucda derbiga iyo xaaladaha isticmaalka, xulashada dhabta ah, qiimaha dhumucda derbiga waa in weli laga tixraacaa miisaska caadiga ah.

 

Asalka iyo Heerarka la xidhiidha SCH (Lambarka Jadwalka)

Nidaamka SCH waxaa asal ahaan aasaasay Machadka Heerarka Qaranka ee Mareykanka (ANSI) ka dibna waxaa qaatay Ururka Mareykanka ee Injineerada Makaanikada (ASME), oo lagu daray heerarka taxanaha B36, si loo muujiyo xiriirka ka dhexeeya dhumucda derbiga tuubada iyo dhexroorka tuubada.

 

Hadda, heerarka caadiga ah ee la isticmaalo waxaa ka mid ah:

ASME B36.10M:
Lagu dabaqi karo birta kaarboonka iyo tuubooyinka birta daawaha, oo daboolaya SCH 10, 20, 40, 80, 160, iwm.;

ASME B36.19M:
Lagu dabaqi karo tubooyinka birta ah, oo ay ku jiraan taxane khafiif ah sida SCH 5S, 10S, 40S, iwm.

 

Soo bandhigida nambarada SCH waxay xalliyeen arintii dhumucda darbiga ee aan iswaafaqsanayn ee matalaada dhexroorka magaceed ee kala duwan, si loo habeeyo naqshadaynta dhuumaha.

 

Sidee SCH (lambarka jadwalka) loo matalay?

Heerarka Mareykanka, dhuumaha waxaa sida caadiga ah lagu tilmaamaa qaabka "NPS + SCH," sida NPS 2" SCH 40, taasoo muujineysa dhuumo leh dhexroor magaceedu yahay 2 inji iyo dhumucda derbiga oo waafaqsan heerka SCH 40.

NPS: Cabbirka tuubada magacaaban, oo lagu qiyaaso inji, kaas oo aan ahayn dhexroorka dhabta ah ee dibadda balse aqoonsiga cabbirka heerka warshadaha. Tusaale ahaan, dhexroorka dhabta ah ee dibadda ee NPS 2" waa ku dhawaad 60.3 millimitir.

SCH: Heerka dhumucda gidaarka, halkaasoo tirooyinka sare ay muujinayaan darbiyada dhumuc weyn, taasoo keeneysa xoog badan oo tuubada iyo iska caabinta cadaadiska.

Isticmaalka NPS 2" tusaale ahaan, dhumucda gidaarka ee tirooyinka SCH ee kala duwan waa sida soo socota (cutubyo: mm):

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

 
【Xusuusin muhiim ah】
- SCH waa calaamad kaliya, ee maaha cabbir toos ah oo dhumucda gidaarka;
- Tuubooyinka leh isla magaca SCH laakiin cabbirrada NPS ee kala duwan ayaa leh dhumucyo kala duwan;
- Markasta oo ay sareeyso qiimeynta SCH, waa sii dhumuc weynaanta gidaarka tuubada iyo sare u qaadista cadaadiska lagu dabaqi karo.