I-ASTM A 53 igubungela umbhobho wentsimbi ongenamthungo kunye newelded kunye nobukhulu bodonga.Ubume bomphezulu buhlala bumnyama kunye nombhobho we-ASTM A53 (ekwabizwa ngokuba ngumbhobho we-ASME SA53) yenzelwe ukusetyenziswa koomatshini kunye noxinzelelo kwaye iyamkeleka kusetyenziso oluqhelekileyo kwimigca yomphunga, yamanzi, igesi kunye nomoya.Ilungele ukuwelda kunye nokwenza imisebenzi ebandakanya ukujiya, ukugoba, kunye ne-flanging.I-tube ye-A53 engenamthungo yimbhobho yentsimbi esemgangathweni yaseMelika.Eyona nkqubo yokuvelisa i-A53 yeetyhubhu zentsimbi ezingenamthungo yahlulwe ibe ngumzobo obandayo kunye nokuqengqeleka okushushu.Umahluko ophambili phakathi kwezi zimbini kukuba inkqubo yokuvelisa imibhobho yentsimbi engenamthungo epholileyo iyinto entsonkothileyo ngokubanzi kuneyokuqengqeleka okushushu, kunye nenkangeleko yentsimbi ebandayo eqengqelekayo umbhobho ongenamthungo mfutshane kunowokuqengqeleka okushushu.Imibhobho yentsimbi eqengqelekayo engenamthungo, ubukhulu bodonga lombhobho wentsimbi yentsimbi eqengqelekayo ebandayo buncinci kunemibhobho yentsimbi yekhabhoni eqengqelekayo, kodwa umphezulu ubonakala uqaqambile.Umphezulu wetyhubhu yentsimbi yekhabhoni eshushu irhabaxa noko.Eyona nkqubo yemveliso engqukuva ityhubhu ayinalutho→ukufudumeza→ukugqobhoza→ukuqengqeleka kwemiqulu emithathu, ukuqengqeleka okuzingileyo okanye ukhuphelo→ukususwa kwetyhubhu→ubungakanani (okanye ukuncitshiswa kwedamitha)→ukupholisa→ukuqondisa→uvavanyo oluqhutywa ngamanzi (okanye ukufunyaniswa kwesiphene)→ukuphawula→ukufakwa kwethala leencwadi.
| I-ASTM A53/ASME SA53 | Uhlobo S | Uhlobo E | Uhlobo F | |||
| (ngaphandle komthungo) | (umbane-ukumelana ne welded) | (umbhobho ofakwe kwiziko) | ||||
| IBanga A | IBanga B | IBanga A | IBanga B | IBanga A | ||
| Ikhabhoni max.% | 0.25 | 0.30* | 0.25 | 0.30* | 0.3 | |
| IManganese % | 0.95 | 1.2 | 0.95 | 1.2 | 1.2 | |
| Phosphorous, max.% | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | |
| Isulfure, max.% | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | |
| Ubhedu, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Nickel, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Chromium, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Molybdenum, max.% | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | |
| Vanadium, max.% | 0.08 | 0.08 | 0.08 | 0.08 | ||
| *Ngokunciphisa ngakunye ngaphantsi kwe-0.01% ngaphantsi kobuninzi bekhabhoni echaziweyo, ukunyuka kwe-0.06% yemanganese ngaphezu kobuninzi obuchaziweyo kuya kuvunyelwa ukuya kuthi ga kwi-1.65% ephezulu (ayisebenzi kwi-SA53). | ||||||
| IiMfuno zeTensile | Ingenamthungo kunye noMbane-ukumelana-welding | Ngokuqhubekayo-Welded | |
| IBanga A | IBanga B | ||
| Amandla e-Tensile, min., psi | 48,000 | 60,000 | 45,000 |
| Isivuno Amandla, min., psi | 30,000 | 35,000 | 25,000 |
1. Inkqubo ephambili yokuvelisa umbhobho wentsimbi engenamthungo eshushu-eqengqelekayo (inkqubo yokuhlola ephambili):
Ukulungiswa kwetyhubhu engenanto kunye nokuhlolwa→ityhubhu engenanto yokufudumeza→ukugqobhoza→ityhubhu eqengqelekayo→ukufudumeza kwakhona kwentsimbi→okuzinzileyo (kwehlisiwe) ubukhulu→unyango lobushushu △→ukulungiswa kwetyhubhu egqityiweyo→ukugqiba→ukuhlola (engonakalisiyo, umzimba kunye neekhemikhali, uhlolo lwaseTaiwan)→indawo yokugcina impahla
2. Eyona nkqubo yokuvelisa imibhobho yentsimbi epholileyo eqengqelekayo (etsaliweyo) engenamthungo:
Ukulungiswa kwebhilethi→ukuchopha ukuthambisa→ukuqengqeleka okubandayo(umzobo)→unyango lobushushu→ukulungisa→ukugqiba→ukuhlola
