1. Ibipimo bya IMIGERI
Umuyoboro w'icyuma wa Imperial ugaragazwa n'umurwa mukuru "Dn." Ingano zirimo dn15 (umuyoboro wa santimetero 4), DN20 (Umuyoboro wa santimetero 6), DN32 Umuyoboro wa santimetero 2), DN65 (Umuyoboro wa santimetero 2,5), DN100 . Kurugero, umuyoboro wamazi wa DN25 (25) uhwanye numuyoboro wa santial 1-santimetero, uzwi kandi nkumuyoboro wa santimetero 8 mbere yingabo zo kwibohora. Umuyoboro w'amazi wa DN15 uhwanye n'imperial 1/2-santimetero, uzwi kandi nkumuyoboro wa santimetero 4 mbere yingabo zo kwibohora. Kurugero, umuyoboro wamazi wa DN20 ni 3/4 "Ibipimo by'Ubwongereza, bizwi kandi nk'umuyoboro wa santimetero 6 mbere yo kwibohora.
2. Ibipimo mpuzamahanga
Umuyoboro mpuzamahanga usanzwe wicyuma ushingiye ku kugabana santimetero mubice bito. Ibisobanuro birimo 1/8, 1/4, na santimetero 3/8, bihwanye nubunini busanzwe buzwi na santimetero 7-santimetero 7. Ingano ntoya zigaragazwa nka 1/16, 1/32, na 1/64, ziracyari muri santimetero. Niba dinominator numubare ushobora kugabanuka (kurugero, umubare ni 2, 4, 8, 16, 16, cyangwa 32), bagomba kugabanuka.
3. Icyuma cyicyuma cyo kubara
Amabwiriza yo kubara ibiro kuburyo butandukanye bwimiyoboro ihanamye iratandukanye. Hasi, Miagoo izatangiza muri make formulane zisanzwe zibara:
Ikigo cyicyuma (kg)=0.00617 x diameter x diameter x uburebure;
Uburemere bwa kare (kg)=0.00785 x kuruhande rwa x kuruhande uburebure bwa x yuburebure;
Uburemere bwijimye (kg)=0.00785 x fickness x ikadiri x uburebure.