Ubukhulu bepayipi lensimbi

Amapayipi ensimbizihlukaniswa ngesimo esinqamulelayo zibe amapayipi ayindilinga, ayisikwele, angunxande, nanobunjwa obukhethekile; ngezinto ezifakwa emapayipini ensimbi esakhiwe ngekhabhoni, amapayipi ensimbi esakhiwe nge-alloy ephansi, amapayipi ensimbi e-alloy, namapayipi ahlanganisiwe; kanye nokusetshenziswa emapayipini okuhambisa amapayipi, izakhiwo zobunjiniyela, imishini yokushisa, izimboni ze-petrochemical, ukukhiqizwa kwemishini, ukubhoboza kwe-geological, kanye nemishini yokucindezela okuphezulu. Ngenqubo yokukhiqiza, zihlukaniswe ngamapayipi ensimbi angenamthungo kanye namapayipi ensimbi ahlanganisiwe. Amapayipi ensimbi angenamthungo ahlukaniswa ngezinhlobo ezigoqekile ezishisayo nezigoqekile ezibandayo (ezidwetshiwe), kuyilapho amapayipi ensimbi ahlanganisiwe ahlukaniswe ngamapayipi ahlanganisiwe aqondile kanye namapayipi ahlanganisiwe ahlanganisiwe ajikelezayo.

 

Kunezindlela eziningi zokumelela amapharamitha obukhulu bepayipi. Ngezansi kunezincazelo zobukhulu bepayipi obusetshenziswa njalo: i-NPS, i-DN, i-OD kanye ne-Schedule.

(1) I-NPS (Usayizi Wepayipi Elijwayelekile)

I-NPS iyindinganiso yaseNyakatho Melika yamapayipi anomfutho ophezulu/ophansi kanye namazinga okushisa aphezulu/aphansi. Iyinombolo engenakulinganiswa esetshenziselwa ukubonisa usayizi wepayipi. Inombolo elandela i-NPS ikhombisa usayizi wepayipi ojwayelekile.

I-NPS isekelwe ohlelweni lwangaphambilini lwe-IPS (Iron Pipe Size). Uhlelo lwe-IPS lwasungulwa ukuze luhlukanise osayizi bamapayipi, ubukhulu obuvezwa ngamasentimitha amele ububanzi obuphakathi obulinganiselwe. Isibonelo, ipayipi le-IPS elingu-6" libonisa ububanzi bangaphakathi obuseduze namasentimitha angu-6. Abasebenzisi baqale ukubiza amapayipi ngokuthi amapayipi angu-2 intshi, angu-4 intshi, noma angu-6 intshi.

 

(2) Ububanzi begama le-DN (Ububanzi begama le-DN)

I-Nominal Diameter DN: Enye indlela yokumelela ububanzi obujwayelekile (imbobo). Isetshenziswa ezinhlelweni zokufaka amapayipi njengesihlonzi sokuhlanganiswa kwezinhlamvu nezinombolo, esakhiwa izinhlamvu i-DN elandelwa yi-dimensional engenakulinganiswa. Kufanele kuqashelwe ukuthi i-DN nominal bore iyi-rounded integer elula ngezinjongo zokubhekisela, enobuhlobo obukhululekile kuphela nobukhulu bokukhiqiza bangempela. Inombolo elandela i-DN ngokuvamile ilinganiswa ngamamilimitha (mm). Ezindinganisweni zaseShayina, ububanzi bamapayipi buvame ukubizwa ngokuthi i-DNXX, njenge-DN50.

Ububanzi bepayipi buhlanganisa ububanzi bangaphandle (OD), ububanzi bangaphakathi (ID), kanye nobubanzi obujwayelekile (DN/NPS). Ububanzi obujwayelekile (DN/NPS) abuhambisani nobubanzi bangempela bangaphandle noma bangaphakathi bepayipi. Ngesikhathi sokukhiqiza nokufaka, ububanzi bangaphandle obuhambisanayo kanye nobukhulu bodonga kumele kunqunywe ngokwezincazelo ezijwayelekile ukuze kubalwe ububanzi bangaphakathi bepayipi.

 

(3) Ububanzi Bangaphandle (OD)

Ububanzi Bangaphandle (OD): Uphawu lobubanzi bangaphandle ngu-Φ, futhi lungachazwa ngokuthi yi-OD. Emhlabeni jikelele, amapayipi ensimbi asetshenziselwa ukuthutha uketshezi avame ukuhlukaniswa ngochungechunge olubili lobubanzi bangaphandle: Uchungechunge A (ububanzi bangaphandle obukhulu, obuyi-imperial) kanye nochungechunge B (ububanzi bangaphandle obuncane, i-metric).

Kukhona uchungechunge oluningi lobubanzi bangaphandle lwamapayipi ensimbi emhlabeni jikelele, njenge-ISO (International Organisation for Standardization), i-JIS (Japan), i-DIN (Germany), kanye ne-BS (UK).

 

(4) Isheduli Yobukhulu Bodonga Lwepayipi

NgoMashi 1927, i-American Standards Committee yenza ucwaningo lwezimboni futhi yaqala ukwanda okuncane phakathi kwamazinga amabili amakhulu obukhulu bodonga lwamapayipi. Lolu hlelo lusebenzisa i-SCH ukukhomba ubukhulu obujwayelekile bamapayipi.

 

 I-EHONG STEEL--ubukhulu bepayipi lensimbi