Usayizi Wepayipi ucaciswe ngezinombolo ezimbili ezingena-dimensional:
Usayizi Wepayipi Lokuqamba (NPS) wobubanzi obususelwe kumayintshi.
Inombolo Yeshejuli (SCH ukuze ucacise ubukhulu bodonga lwePipe.
Kokubili ubukhulu kanye nesimiso kuyadingeka ukuze ucacise ngokunembile ucezu oluthile lwepayipi.
Usayizi Wepayipi Lokubizwa (NPS) Isethi yamanje yaseNyakatho Melika yosayizi abajwayelekile bamapayipi asetshenziselwa ukucindezela okuphezulu nokuphansi kanye namazinga okushisa.Ingxoxo eyengeziwe ngalokhu ilapha.
Usayizi Wepayipi Lensimbi (IPS) bekuyindinganiso yangaphambili kune-NPS yokuqoka usayizi.Usayizi wawulingana nobubanzi bangaphakathi bepayipi ngamayintshi.Ipayipi ngalinye lalinogqinsi olulodwa, okuthiwa (STD) Standard noma (STD.WT.) Isisindo Esijwayelekile.Ngaleso sikhathi kwakukhona ukujiya kwezindonga ezingu-3 kuphela.Ngo-March 1927, i-American Standards Association yakha uhlelo olwaqoka ukujiya kodonga olusekelwe ezinyathelweni ezincane phakathi kosayizi futhi yethula Usayizi Wepayipi Lokubizwa elathatha indawo ye-Iron Pipe size.
Inombolo Yeshejuli yokujiya kodonga isuka ku-SCH 5, 5S, 10, 10S, 20, 30, 40, 40S, 60, 80, 80S, 100, 120, 140, 160, STD, XS (Inamandla Kakhudlwana) KANYE NE-XXS (Ekabili Kunamandla).
Imigomo Yenzalo yepayipi kanye ne-Tubing
I-BPE - Ipayipi Lokugcina Elimnyama Elimnyama
I-BTC - Intambo Emnyama & Ehlanganisiwe
I-GPE - I-Galvanized Plain End
I-GTC - Intambo Eyisikhalisi & Ehlanganisiwe
I-TOE - I-Threaded One End
I-Pipe Coatings & Finish:
I-Galvanized - Imbozwe nge-zinc evikelayo ensimbi ukuze ivimbele izinto ukuthi zingagqwali.Inqubo ingaba i-hot-dip-galvanizing lapho i-material icwiliswa ku-zinc encibilikisiwe noma i-Electro-Galvanized lapho ishidi lensimbi okwenziwa ngalo ipayipi lafakwa uthayela ngesikhathi sokukhiqizwa ngokusabela kwe-electro-chemical.
Elingagqokile - Ipayipi Elingagcotshiwe
I-Black Coated - Imbozwe nge-iron-oxide enombala omnyama
I-Red Primed -I-Red Oxide Primed esetshenziswa njengejazi lesisekelo sezinsimbi ezisansimbi, inika insimbi nensimbi ungqimba lwesivikelo.