Miyeso ya chitoliro chachitsulo

Mapaipi achitsuloamaikidwa m'mapaipi ozungulira, masikweya, amakona anayi, ndi mawonekedwe apadera; ndi zinthu mu carbon structural zitsulo mapaipi, otsika aloyi structural zitsulo mapaipi, aloyi zitsulo mapaipi, ndi mapaipi gulu; ndi kugwiritsa ntchito mapaipi otumizira mapaipi, zomangamanga, zida zotenthetsera, mafakitale amafuta, kupanga makina, kubowola miyala, ndi zida zothamanga kwambiri. Mwa kupanga, amagawidwa kukhala mapaipi opanda zitsulo ndi mipope yachitsulo. Mapaipi achitsulo opanda msoko amagawidwanso mu mitundu yotentha komanso yozizira (yokokedwa), pomwe mapaipi achitsulo amagawika m'mapaipi owongoka ndi ma spiral seam welded.

 

Pali njira zingapo zowonetsera magawo a chitoliro. M'munsimu muli mafotokozedwe a miyeso ya mapaipi omwe amagwiritsidwa ntchito kawirikawiri: NPS, DN, OD ndi Schedule.

(1) NPS (Kukula Kwapaipi Kwadzina)

NPS ndiye muyezo waku North America wamapaipi apamwamba/otsika komanso otsika kwambiri/otentha kwambiri. Ndi nambala yopanda miyeso yomwe imagwiritsidwa ntchito kutanthauza kukula kwa chitoliro. Nambala yotsatira NPS imasonyeza kukula kwa chitoliro.

NPS imachokera ku IPS (Iron Pipe Size) yoyambirira. Dongosolo la IPS linakhazikitsidwa kuti lisiyanitse kukula kwa mapaipi, ndi miyeso yowonetsedwa mu mainchesi kuyimira pafupifupi m'mimba mwake. Mwachitsanzo, chitoliro cha IPS 6" chimasonyeza kukula kwa mkati moyandikira mainchesi 6. Ogwiritsa ntchito anayamba kunena za mapaipi ngati mapaipi a mainchesi 2, 4, kapena 6 inchi.

 

(2) Nominal Diameter DN (Diameter Nominal)

Nominal Diameter DN: Njira ina yoyimira m'mimba mwake mwadzina (bore). Amagwiritsidwa ntchito m'mapaipi ngati chizindikiritso chophatikiza zilembo ndi manambala, okhala ndi zilembo DN zotsatiridwa ndi nambala yopanda mawonekedwe. Zindikirani kuti DN bore ndi nambala yozungulira yoyenera kuti igwiritsidwe ntchito, yomwe imangokhala ndi ubale womasuka ndi miyeso yeniyeni yopangira. Nambala yotsatila DN nthawi zambiri imakhala mamilimita (mm). M'miyezo yaku China, ma diameter a chitoliro nthawi zambiri amatchulidwa kuti DNXX, monga DN50.

Ma diameter a chitoliro amaphatikiza awiri akunja (OD), mainchesi amkati (ID), ndi mainchesi odziwika (DN/NPS). M'mimba mwake mwadzina (DN/NPS) sagwirizana ndi m'mimba mwake weniweni wakunja kapena wamkati wa chitoliro. Pakupanga ndi unsembe, lolingana m'mimba mwake ndi khoma makulidwe ayenera kutsimikiziridwa malinga muyezo specifications kuwerengera m'mimba mwake chitoliro.

 

(3) Diameter Yakunja (OD)

Diameter Yakunja (OD): Chizindikiro cha m'mimba mwake wakunja ndi Φ, ndipo chingatanthauze kuti OD. Padziko lonse, mipope zitsulo ntchito kutengerapo madzimadzi nthawi zambiri m'magulu awiri akunja awiri angapo mndandanda: Series A (diameters zazikulu zakunja, mfumu) ndi Series B (diameter ang'onoang'ono akunja, miyeso).

Padziko lonse lapansi pali mitundu ingapo yamapaipi akunja achitsulo, monga ISO (International Organisation for Standardization), JIS (Japan), DIN (Germany), ndi BS (UK).

 

(4) Chitoliro cha Kukula kwa Khoma

Mu Marichi 1927, American Standards Committee idachita kafukufuku wamafakitale ndipo idayambitsa ma increments ang'onoang'ono pakati pa masukulu awiri oyambira makulidwe a khoma. Dongosololi limagwiritsa ntchito SCH kutanthauza makulidwe odziwika a mapaipi.

 

 EHONG STEEL - miyeso ya chitoliro chachitsulo