Menene diamita mara kyau?

Gabaɗaya magana, ana iya raba diamita na bututu zuwa diamita na waje (De), diamita na ciki (D), diamita mara kyau (DN).
A ƙasa don ba ku bambanci tsakanin waɗannan "De, D, DN" bambanci.

DN shine diamita mara kyau na bututu

Lura: Wannan ba diamita na waje bane ko diamita na ciki; yakamata ya kasance yana da alaƙa da farkon haɓaka aikin injiniyan bututun bututu da sassan daular; yawanci ana amfani da shi don kwatanta bututun ƙarfe na galvanized, wanda yayi daidai da raka'a na sarki kamar haka:

4-bangaren bututu: 4/8 inch: DN15;
Bututu na minti 6: 6/8 inch: DN20;
1 inch bututu: 1 inch: DN25;
Inci biyu bututu: 1 da 1/4 inci: DN32;
Bututun rabin inci: 1 da 1/2 inci: DN40;
Bututu mai inci biyu: inci 2: DN50;
Bututu mai inci uku: inci 3: DN80 (kuma ana yiwa wurare da yawa lakabin DN75);
Bututu mai inci huɗu: inci 4: DN100;
Ruwa, iskar gas watsa karfe bututu (galvanized karfe bututuko bututun ƙarfe mara galvanized), bututun simintin ƙarfe, bututun ƙarfe-roba mai haɗaka bututu da bututun polyvinyl chloride (PVC) da sauran kayan bututu, yakamata a yi alama da diamita mara kyau “DN” (kamar DN15, DN20).

 

De galibi yana nufin diamita na waje na bututu
Gabaɗaya amfani da lakabin De, yana buƙatar sanyawa a cikin nau'in kauri na bangon diamita na waje;

Anfi amfani dashi don siffanta:bututu maras nauyi, PVC da sauran bututun filastik, da sauran bututun da ke buƙatar kaurin bango.
Dauki galvanized welded karfe bututu a matsayin misali, tare da DN, De biyu labeling hanyoyin ne kamar haka:
DN20 De25×2.5mm
DN25 De32×3mm
DN32 De40×4mm
DN40 De50×4mm

......

 

D gabaɗaya yana nufin diamita na ciki na bututu, d yana nuna diamita na ciki na bututun, kuma Φ yana nuna diamita na da'irar talakawa.

Φ kuma na iya nuna diamita na waje na bututu, amma sai ya kamata a ninka ta kauri na bango.
Misali, Φ25×3 yana nufin bututu mai diamita na waje na 25mm da kaurin bango na 3mm.
Bututun ƙarfe mara ƙarfi ko bututun ƙarfe mara ƙarfe, yakamata a yiwa alama “diamita na waje × kauri na bango”.
Misali: Φ107×4, inda Φ za a iya tsallake.
China, ISO da Japan's part na karfe bututu lakabi ta amfani da bango kauri girma don nuna kauri bango jerin bututun karfe. Don irin wannan nau'in bututun ƙarfe, hanyar magana don bututun waje diamita × kauri bango. Misali: Φ60.5×3.8

De, DN, d, ф na kewayon magana!
De-- PPR, PE bututu, polypropylene bututu OD
DN - polyethylene (PVC) bututu, jefa baƙin ƙarfe bututu, karfe-roba hada bututu, galvanized karfe bututu maras muhimmanci diamita
d -- kankare bututu mai ƙima
ф -- diamita na bututu maras sumul