Kodi SCH (Nambala ya Ndondomeko) ndi chiyani?

SCH imayimira "Schedule," yomwe ndi makina owerengera omwe amagwiritsidwa ntchito mu American Standard Pipe System kusonyeza makulidwe a khoma. Amagwiritsidwa ntchito molumikizana ndi m'mimba mwake mwadzina (NPS) kuti apereke zosankha zofananira zamapaipi amitundu yosiyanasiyana, kuwongolera mapangidwe, kupanga, ndi kusankha.

 

SCH sasonyeza mwachindunji makulidwe a khoma koma ndi dongosolo losungira lomwe limafanana ndi makulidwe a khoma lapadera kudzera pa matebulo okhazikika (mwachitsanzo, ASME B36.10M, B36.19M).

 

M'magawo oyambilira a chitukuko chokhazikika, njira yofananira idapangidwa kuti ifotokoze ubale pakati pa SCH, kukakamizidwa, ndi mphamvu zakuthupi:
SCH ≈ 1000 × P / S
Kumene:
P - Kuthamanga kwapangidwe (psi)
S - Kupanikizika kovomerezeka kwazinthu (psi)

 

Ngakhale fomulayi ikuwonetsa mgwirizano pakati pa makulidwe a khoma ndi momwe amagwiritsidwira ntchito, pakusankha kwenikweni, makulidwe ofananirako akuyenera kufotokozedwabe kuchokera pamatebulo wamba.

 

Zoyambira ndi Zogwirizana nazo za SCH (Nambala ya Ndandanda)

Dongosolo la SCH lidakhazikitsidwa poyambilira ndi American National Standards Institute (ANSI) ndipo pambuyo pake linavomerezedwa ndi American Society of Mechanical Engineers (ASME), lophatikizidwa mumiyeso ya B36, kuwonetsa ubale pakati pa makulidwe a khoma la chitoliro ndi m'mimba mwake.

 

Masiku ano, zomwe zimagwiritsidwa ntchito kwambiri ndi:

ASME B36.10M:
Kugwira ntchito pa carbon zitsulo ndi aloyi zitsulo mapaipi, kuphimba SCH 10, 20, 40, 80, 160, etc.;

ASME B36.19M:
Kugwira ntchito mapaipi zitsulo zosapanga dzimbiri, kuphatikizapo opepuka mndandanda monga SCH 5S, 10S, 40S, etc.

 

Kuyambitsidwa kwa manambala a SCH kunathetsa vuto la kuyimira makulidwe a khoma mosagwirizana ndi ma diameter osiyanasiyana, potero kulinganiza kapangidwe ka mapaipi.

 

Kodi SCH (nambala ya ndondomeko) imaimiridwa bwanji?

Pamiyezo yaku America, mapaipi amatanthauzidwa kuti "NPS + SCH," monga NPS 2" SCH 40, kusonyeza payipi yokhala ndi mainchesi awiri ndi makulidwe a khoma mogwirizana ndi muyezo wa SCH 40.

NPS: Kukula kwa chitoliro mwadzina, kuyezedwa mu mainchesi, komwe sikuli m'mimba mwake weniweni wakunja koma chozindikiritsa chamakampani. Mwachitsanzo, m'mimba mwake chenicheni cha NPS 2" ndi pafupifupi 60.3 millimeters.

SCH: Gulu la makulidwe a khoma, pomwe manambala apamwamba amawonetsa makoma okulirapo, zomwe zimapangitsa kuti chitoliro chikhale cholimba komanso kukana kukanikiza.

Pogwiritsa ntchito NPS 2" mwachitsanzo, makulidwe a khoma la manambala osiyanasiyana a SCH ali motere (mayunitsi: mm):

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

 
【Chidziwitso Chofunikira】
- SCH ndi dzina chabe, osati muyeso wachindunji wa makulidwe a khoma;
- Mapaipi omwe ali ndi dzina lomwelo la SCH koma makulidwe osiyanasiyana a NPS ali ndi makulidwe osiyanasiyana;
- Kukwera kwa SCH kumapangitsa kuti khoma la chitoliro likhale lolimba komanso kuwonjezereka kwa mphamvu zomwe zimagwiritsidwa ntchito.