SCH e emetse "Schedule," e leng mokhoa oa ho bala o sebelisoang ho American Standard Pipe System ho bontša botenya ba lebota. E sebelisoa hammoho le bophara ba lebitso (NPS) ho fana ka likhetho tse tloaelehileng tsa botenya ba marako 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 hlophisa o tsamaellanang le botenya bo itseng ba marako ka litafole tse tloaelehileng (mohlala, ASME B36.10M, B36.19M).
Mehatong ea pele ea nts'etsopele e tloaelehileng, ho ile ha hlahisoa mokhoa o lekantsoeng oa ho hlalosa kamano lipakeng tsa SCH, khatello le matla a lintho tse bonahalang:
SCH ≈ 1000 × P / S
Moo:
P - Khatello ea moralo (psi)
S - Khatello e lumelletsoeng ea thepa (psi)
Leha foromo ena e bonts'a kamano lipakeng tsa moralo oa botenya ba lebota le maemo a ts'ebeliso, khethong ea 'nete, boleng bo tsamaellanang le botenya ba lebota bo ntse bo tlameha ho boleloa ho tsoa litafoleng tse tloaelehileng.
Tšimoloho le Maemo a Amanang a SCH (Nomoro ea Kemiso)
Tsamaiso ea SCH e qalile ho thehoa ke American National Standards Institute (ANSI) 'me hamorao ea amoheloa ke American Society of Mechanical Engineers (ASME), e kenyelletsoeng letotong la litekanyetso tsa B36, ho bontša kamano pakeng tsa botenya ba lerako la pipe le bophara ba pipe.
Hona joale, litekanyetso tse sebelisoang hangata li kenyelletsa:
ASME B36.10M:
E sebetsa ho liphaephe tsa tšepe tsa carbon le alloy, tse koahelang SCH 10, 20, 40, 80, 160, joalo-joalo;
ASME B36.19M:
E sebetsa ho lipeipi tsa tšepe tse sa hloekang, ho kenyelletsa le letoto le bobebe joalo ka SCH 5S, 10S, 40S, joalo-joalo.
Kenyelletso ea linomoro tsa SCH e rarollotse taba ea boemeli ba botenya ba lebota bo sa tsitsang ka bophara ba li-diameter tse fapaneng, ka hona ho etsa hore moralo oa lipeipi o eketsehe.
SCH (nomoro ea kemiso) e emeloa joang?
Ho latela maemo a Amerika, liphaephe ka tloaelo li hlalosoa li sebelisa sebopeho sa "NPS + SCH," joalo ka NPS 2" SCH 40, e bonts'ang phaephe e bophara ba lisenthimithara tse peli le botenya ba lebota bo lumellanang le maemo a SCH 40.
NPS: Boholo ba liphaephe ka lebitso, bo lekantsoeng ka lisenthimithara, tseo e seng bophara ba 'nete ba kantle empa ke sekhetho sa maemo a indasteri. Mohlala, bophara ba kantle ba NPS 2" bo ka ba limilimithara tse 60.3.
SCH: Kereiti ea botenya ba lebota, moo lipalo tse phahameng li bonts'ang marako a teteaneng, e leng se bakang matla a liphaephe tse kholo le ho hanyetsa khatello.
Ho sebelisa NPS 2" e le mohlala, botenya ba lebota bakeng sa linomoro tse fapaneng tsa SCH bo tjena (liyuniti: mm):
SCH 10: 2.77 limilimithara
SCH 40: 3.91 limilimithara
SCH 80: 5.54 limilimithara
【Keletso ea Bohlokoa】
- SCH ke lebitso 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 lebota;
- Ha tekanyo ea SCH e phahame, lerako la liphaephe le teteaneng le ho feta tekanyo ea khatello e sebetsang.
Nako ea poso: Jun-27-2025
