ASTM A179 (ASME SA179) waa tuubo bir ah oo qabow-dheefan oo hooseeysa oo loo istcimaalayo weriyeyaasha kulaylka tubbada, qaboojiyaha, iyo codsiyada kulaylka la midka ah.
ASTM A179 iyo ASME SA179 waa laba heer oo gebi ahaanba u dhigma.Si loo fududeeyo, ASTM A179 ayaa hoos loo isticmaalaa.
ASTM A179 waxay ku habboon tahay tuubooyinka birta ee leh dhexroorka dibadda ee 1/8 "- 3" [3.2mm - 76.2mm].
Botop Steelwaa kaydiyaha dhuunta birta ee birta ah ee ka yimid Shiinaha, oo ku siinaya xul aad u badan oo tayo sare leh oo ah ASTM A179/ASME SA179 tuubooyinka birta ee qabowga leh.
Waxaan u heellannahay inaan siino macaamiisheena alaabada iyo adeegyada ugu tayada sarreeya si aan u hubinno in mashaariicdaadu si habsami leh u socdaan.Dooro Botop Steel, oo dooro lammaane la isku halayn karo.
Waxaan horay u soo sheegnay in A179 la soo saaray iyadoo la adeegsanayo habka wax soo saarka ee qabow-jiiday.Waa maxay hababka gaarka ah ee ku lug leh wax-soo-saarka qabow-jiiday?Fadlan eeg jaantuska socodka socodka ee soo socda.
Heerka ASTM,A556sidoo kale waxay isticmaashaa habka wax soo saarka ee bilaa-qabow ee qabow-jiiday laakiin si gaar ah ayaa loogu talagalay kuleyliyaha biyaha tuubada.Ciddii danaynaysaa way ogaan kartaa wax badan.
Kadib sawirka qabow ee u dambeeya, tuubooyinka birta waxaa lagu daaweeyaa kulayl heerkul ah 1200°F [650°C] ama ka sareeya.
| Heerka | C | Mn | P | S |
| ASTM A179 | 0.06-0.18% | 0.27-0.63% | 0.035% ugu badnaan | 0.035% ugu badnaan |
ASTM A179 ma ogola in lagu daro walxaha kale ee ka kooban kiimikada.
Adkeega tuubada birta waa in aanay ka badnayn 72 HRBW (adkeydka Rockwell).
| Xoog xajin | Xoog soo saar | Dheeraynta | Tijaabada fidsan | Tijaabada Dhalinta | Tijaabada Flange |
| min | min | 2 inji ama 50 mm, min | |||
| 47 ksi [325 MPa] | 26 ksi [180 MPa] | 35% | Eeg ASTM A450, Qaybta 19 | Eeg ASTM A450, Qaybta 21 | Eeg ASTM A450, Qaybta 22 |
Tuubo kasta waa in la mariyaa tijaabada cadaadiska haydarooliga ama, haddii iibsaduhu sidaas ku qeexo, tijaabo koronto oo aan burburin ayaa la isticmaali karaa beddelkeeda.
Tuubada birta waxay ilaalisaa cadaadiska ugu yaraan 5s iyada oo aan la daadin.
Cadaadiska tijaabada waxaa lagu xisaabiyaa iyadoo la isticmaalayo qaacidada soo socota:
Inj - Halbeeg Pound: P = 32000 t/D
Unugyada SI: P = 220.6t/D
P = cadaadiska tijaabada hydrostatic, psi ama MPa;
t = dhumucdiisuna waxay cayiman tahay, gudaha ama mm;
D = dhexroor ka baxsan oo cayiman, gudaha ama mm.
Kuwa soo socdaa waa baakad caadi ah oo A179 ah, baakadaha la habeeyey ayaa sidoo kale lagu bixin karaa iyadoo loo eegayo shuruudaha mashruuca.
Tuubo qaawan, daahan madow (la habeeyey);
6" iyo cabbir ka hooseeya Xirmooyinka leh laba dharbaaxo suuf ah, cabbirro kale oo dabacsan;
Labaduba waxay ku dhammaadaan ilaaliyeyaasha dhamaadka;
Dhamaadka cad, dhammaadka jeexjeexyada;
Calaamadayn
