SCH (Nomoro ea Kemiso) ke eng?

SCH e emetse "Kemiso," e leng sistimi ea linomoro e sebelisoang ho American Standard Pipe System ho bontša botenya ba lebota. E sebelisoa hammoho le nominal diameter (NPS) ho fana ka likhetho tse tloaelehileng tsa botenya ba lebota bakeng sa liphaephe tsa boholo bo fapaneng, ho nolofatsa moralo, tlhahiso le khetho.

 

SCH ha e bontše ka ho toba botenya ba lebota empa ke mokhoa oa ho beha lintlha o tsamaellanang le botenya bo itseng ba lebota ka litafole tse tloaelehileng (mohlala, ASME B36.10M, B36.19M).

 

Mehatong ea pele ea nts'etsopele e tloaelehileng, mokhoa o hakanyetsoang o ile oa hlahisoa ho hlalosa kamano pakeng tsa SCH, khatello le matla a thepa:
SCH ≈ 1000 × P / S
Moo:
P — Kgatelelo ya moralo (psi)
S — Kgatelelo e dumelletsweng ya thepa (psi)

 

Leha foromo ena e bonts'a kamano pakeng tsa moralo oa botenya ba lebota le maemo a ts'ebeliso, khethong ea 'nete, boleng bo tsamaellanang ba botenya ba lebota bo ntse bo lokela ho qotsoa ho tsoa litafoleng tse tloaelehileng.

 

Tšimoloho le Maemo a Amanang a SCH (Nomoro ea Kemiso)

Sistimi ea SCH e thehiloe qalong ke American National Standards Institute (ANSI) 'me hamorao ea amoheloa ke American Society of Mechanical Engineers (ASME), e kenyellelitsoeng letotong la litekanyetso tsa B36, ho bontša kamano pakeng tsa botenya ba lebota la phaephe le bophara ba phaephe.

 

Hona joale, maemo a sebelisoang haholo a kenyelletsa:

ASME B36.10M:
E sebetsa ho liphaephe tsa tšepe ea khabone le tsa alloy, tse koahelang SCH 10, 20, 40, 80, 160, jj.;

ASME B36.19M:
E sebetsa ho liphaephe tsa tšepe e sa ruseng, ho kenyeletsoa le letoto le bobebe joalo ka SCH 5S, 10S, 40S, jj.

 

Ho hlahisoa ha dinomoro tsa SCH ho rarollotse bothata ba boemedi bo sa tsitsang ba botenya ba lebota ho pholletsa le bophara bo fapaneng ba mabitso, ka hona ho etsa hore moralo wa diphaephe o be maemong a tloaelehileng.

 

SCH (nomoro ea kemiso) e emeloa joang?

Litekanyetsong tsa Amerika, liphaephe hangata li bontšoa ka mokhoa oa "NPS + SCH," joalo ka NPS 2" SCH 40, e bontšang phaephe e nang le bophara bo tloaelehileng ba lisenthimithara tse 2 le botenya ba lebota bo lumellanang le tekanyetso ea SCH 40.

NPS: Boholo ba phaephe bo tloaelehileng, bo lekanngoang ka lisenthimithara, e seng bophara ba 'nete ba kantle empa e le sesupo sa tekanyo e tloaelehileng ea indasteri. Mohlala, bophara ba 'nete ba kantle ba NPS 2" ke hoo e ka bang limilimithara tse 60.3.

SCH: Botenya ba lebota, moo dipalo tse phahameng di bontshang mabota a teteaneng, e leng se fellang ka matla a phaephe a maholo le kgatello e hanelang.

Ho sebelisoa mohlala oa NPS 2", botenya ba lebota bakeng sa linomoro tse fapaneng tsa SCH ke tse latelang (liyuniti: mm):

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

 
【Tlhokomeliso ea Bohlokoa】
— SCH ke tlhaloso feela, eseng tekanyo e tobileng ea botenya ba lebota;
— Liphaephe tse nang le lebitso le tšoanang la SCH empa boholo bo fapaneng ba NPS bo na le botenya bo fapaneng ba mabota;
— Ha tekanyo ea SCH e phahame, lebota la phaephe le ba letenya le ho feta tekanyo ea khatello e sebetsang.