(1) Ukuxhumeka kwe-node kulungele ukushiselwa okuqondile, futhi akudingi ukudlula ipuleti le-node noma ezinye izingxenye zokuxhuma, okusindisa abasebenzi kanye nezinto zokwakha.

(2) Uma kudingekile, ukhonkolo ungathelwa epayipini ukuze kwakhiwe ingxenye eyinhlanganisela.

(3) Izici zejiyomethri zesigaba sepayipi zinhle, udonga lwamapayipi ngokuvamile luncane, impahla yesigaba isakazwa eduze kwe-centroid, i-radius ye-gyration yesigaba inkulu, futhi inokuqina okuqinile kwe-torsional;njengengxenye yokugoqa, ukucindezelwa, kanye ne-bidirectional, Umthamo wayo wokuthwala uphakeme, futhi ukuqondisa kwamapayipi akheke abandayo kanye nokunemba kobukhulu bezingxenye eziphambanayo kungcono kunalezo zezigaba ezivulekile ezigoqelwe ngokushisayo.

(4) Ukubukeka kuhle kakhulu, ikakhulukazi ipayipi lepayipi elakhiwe amalungu epayipi lensimbi, akukho ukuxhumana okungadingekile okuhlangene, futhi umuzwa wesimanje unamandla.

(5) Ngokuphathelene nezici ze-anti-hydrodynamic, isigaba sesiphambano se-tube nxazonke singcono, futhi umphumela wokugeleza komoya nokugeleza kwamanzi uyancipha kakhulu.Ingxenye yeshubhu elingunxande iyafana nezinye izigaba ezivulekile kulokhu.

(6) Amapayipi ensimbi anobubanzi obukhulu aneziphambano ezivaliwe;lapho ukushuba okumaphakathi nendawo ephambanayo kuyafana, indawo engaphezulu eveziwe icishe ibe ngu-50% kuya ku-60% we-cross-section evulekile, enenzuzo ekuvimbeleni ukugqwala futhi ingasindisa izinto zokumboza.