amadijomethe kanye nezibophelo zemipumpu yamakoti

Kuhlaniswa amapipes ngokwemikreteriya emitsha: ngokweqondo lekanda esekelwe kulo kwiindlela, isikwele, isikhasi, nezinhloso eziphathwe; ngokwezinhlobo zematerial kwiindlela zemoto, amadoda amaphakathi, amadoda amathathu, nezinhlobo ezihlanganisiwe; futhi ngokwesiksempilo kuzo lezo zisetyenziswa kumacondlo, amasithithi, izithuthi zokwanda, iziphiyoleyo, ukwenza izinto, ukulungisa izwe, nezinto zokwanda okuphezulu. Ngokwemikhiyana yokwenza, kuhlwaniswa kwiindlela ezingenakho (ezilandelayo kwiindlela zokwanda nezokucitha) nezindlela zokugqibela (ezahlukaniswa ngokweqondo lokugqibela nezindlela zokugqibela).

Izibophelo zokulinganisa zingakwaciselwa ngendlela engaphelele. Le ngeyokuqala kubonisa izibophelo ebonakalayo: NPS, DN, OD neSchedule.

(1) NPS (Nominal Pipe Size)
I-NPS iyisistimu sokulinganisa ePhakathi ne-Amerika esetshenziswa kwezindulu ngokwesivikelo futhi ngezimo ezahlukahlukene zokuvula. Iyisibonakudwa esinombala engenakuchazwa ngokuchazwa kwebangwe. Inombala evela emuva kwe-"NPS" iyisibonakudwa esivelelwe kwebangwe.
Le ndawo yavulekile kumaqondo wokuqala we-IPS (Inombala yendulu yeIron) esetshenziswa ukwakala phakathi kwezindulu ezahlukahlukene ngokulingana ne-diameter yangaphakathi ehlelwe kwi-inchi. Isibonelo, indulu ye-IPS 6″ inenombala yangaphakathi eka 6 inches. Ngakho, izindulu zazwakala kuchazwa ngale ndawo (isibonelo, 2-inch, 4-inch, 6-inch).

(2) Inombala Yonke DN (Diameter Nominal)
I-DN isebenta njengegama linye lokuhumeshwa kwekona lelilinganiso. Isetshenziselwa kumaqondo epipe njengesiqephu se alphanumeric, esivumelana nezilimi "DN" ngemuva kwalokhu kunekona inombolo engenakuphawula. Kuhle ukucacisa ukuthi inani le-DN lithola ukukhuphuka okulinganiswe fela, akuyona ngokwengeziwe izinhlanhla zokwenziwa. Kumaqondo e-China, izinhla zepipe ngokuvamile zihlalwe njenge-DNXX (isb., DN50), lapho inombolo ngokuvamile ishwa ngemilimitha (mm).
Umbiko wokuthiwa kwekona lepipe uyafaka ukuphakama kwangaphandle (OD), ukuphakama kwangaphakathi (ID), nokuphakama okulinganiselwe (DN/NPS). Okulinganiselwe (DN/NPS) akuyona ngokwengeziwe i-OD noma i-ID; futhi, izimo ezifanele zisitimela ukuphakama okudingekayo kanye nezinhla zokubhaliwe fomu yokwenziwa nokufaka, lapho i-ID itholakala.

(3) Ukuphakama Kwangaphandle (OD)
Iqhutswe ngokusho kuka-Φ noma ukucindezela kuka-OD, ubukhulu obangaphandle kuyindlela esenza ngokukhulu. Ngokudlulwa kwezinye izizwe, izindiza zokulayisha amanzi ephahla nezindiza zokulayisha amanzi ephahla ziqukwe kuqembu lombili: i-OD (yaseNingizimu, nezibukhulu ezinkulu) neqembu lombili B (yaseMetriki, nezibukhulu ezincane).
Izinye istandadha zaseNingizimu zenza umbili wokubhaliwa kwe-OD, ezifakwe ngama-ISO (International Organization for Standardization), JIS (Japanese Industrial Standards), DIN (German Institute for Standardization), ne-BS (British Standards).

(4) Isikweletu se-Gqunyi lweNtonga
Ngokwesinye seMpi 1927, i-American Standards Committee wakwabelana nokusebenza kwebhloko elichaza izindleke zokubhaliwa kwezindiza phakathi kweqembu elibili. Le bhloko isebenza ngeyigama "Isikweletu" (okusho kuye ngu-SCH) ukuqonta ukubhaliwa okulinganiselwe kwezindiza.

EHONG STEEL--izindiza zokulayisha amanzi ephahla