A cikin ayyukan samar da masana'antu na zamani, tsarin ƙarfe shine muhimmin mahimmanci na asali, kuma nau'i da nauyin bututun ƙarfe da aka zaɓa zai shafi inganci da amincin ginin kai tsaye. Lokacin ƙididdige nauyin bututun ƙarfe, ana amfani da bututun ƙarfe na carbon gabaɗaya. Saboda haka, yadda za a lissafta nauyin carbon karfe bututu & tubing?

1. Carbon karfe bututu & tubing nauyi lissafin dabara:
kg/m = (Od - Wt) * Wt * 0.02466

Formula: (diamita na waje - kaurin bango) × kauri bango mm × 0.02466 × tsawon m

Misali: carbon karfe bututu & tubing waje diamita 114mm, bango kauri 4mm, tsawon 6m
Lissafi: (114-4)×4×0.02466×6=65.102kg

Saboda bacewar da aka yarda da ƙarfe a cikin tsarin masana'antu, ma'aunin ma'aunin da aka ƙididdige shi ta hanyar dabara ya ɗan bambanta da ainihin nauyin, don haka ana amfani dashi kawai azaman tunani don kimantawa. Wannan yana da alaƙa kai tsaye da tsayin tsayi, yanki na yanki da girman juriya na ƙarfe.
2. Ainihin nauyin ƙarfe yana nufin nauyin da aka samu ta ainihin ma'auni (nauyin) na karfe, wanda ake kira ainihin nauyin.
Nauyin na ainihi ya fi daidai fiye da nauyin ka'idar.

3. Hanyar lissafin nauyin karfe

(1) Babban nauyi: Shi ne ma'auni na "nauyin net", wanda shine jimlar nauyin karfe da kansa da kayan marufi.
Kamfanin sufuri yana ƙididdige jigilar kaya bisa ga babban nauyi. Koyaya, ana ƙididdige siye da siyar da ƙarfe ta hanyar nauyi.
(2) Nauyin net: Shi ne ma'auni na "babban nauyi".
Nauyin bayan an cire nauyin kayan marufi daga babban nauyin karfe, wato, ainihin nauyin, ana kiransa nauyin net.
A cikin siye da siyar da samfuran karfe, ana ƙididdige shi gabaɗaya ta hanyar nauyi.
(3) Tare da nauyi: nauyin kayan marufi na karfe, wanda ake kira nauyin tare.
(4) Ton nauyi: naúrar nauyi da ake amfani da ita lokacin ƙididdige cajin kaya dangane da babban nauyin ƙarfe.
Ma'auni na doka shine ton (1000kg), sannan akwai kuma dogayen ton (1016.16kg a tsarin Burtaniya) da gajeriyar ton (907.18kg a tsarin Amurka).
(5) Nauyin lissafin: wanda kuma aka sani da "Billing ton" ko "Ton na kaya".

4. Nauyin karfen da sashen sufuri ke cajin kaya.

Hanyoyin sufuri daban-daban suna da ma'auni da hanyoyin lissafi daban-daban.
Irin su jigilar motocin dogo, gabaɗaya suna amfani da alamar lodin babbar motar azaman nauyin lissafin kuɗi.
Don jigilar hanya, ana cajin jigilar kaya bisa ga yawan abin hawa.

Don ƙananan motocin da ba su kai manyan motoci ba na titin jirgin ƙasa da manyan tituna, mafi ƙarancin nauyin da za a iya caji ya dogara ne akan babban nauyin kilogiram da yawa, kuma ana tattarawa idan bai isa ba.