I-ASTM A 53 imboza ipayipi lensimbi elingenamthungo nelishiselwe elinodonga oluwugqinsi.Isimo esingaphezulu sivame ukuba mnyama futhi ipayipi le-ASTM A53 (elibuye libizwe ngepayipi le-ASME SA53) lenzelwe ukufakwa kwemishini nokucindezela futhi liyamukeleka ekusetshenzisweni okuvamile emigqeni yesitimu, amanzi, igesi nomoya.Ilungele ukushisela nokwenza imisebenzi ehlanganisa ukugoqa, ukugoba, kanye ne-flanging.Ishubhu lensimbi engenamthungo le-A53 liyipayipi lensimbi elijwayelekile laseMelika.Inqubo yokukhiqiza eyinhloko yamashubhu ensimbi angenamthungo e-A53 ihlukaniswe yaba umdwebo obandayo kanye nokuginqika okushisayo.Umehluko omkhulu phakathi kwalokhu okubili ukuthi inqubo yokukhiqiza amapayipi ensimbi angenamthungo abandayo ngokuvamile ayinkimbinkimbi kakhulu kunaleyo yokuginqika okushisayo, futhi ukubukeka kwepayipi elibandayo eligoqiwe lensimbi elingenamthungo lifushane kunalelo eliginqikayo elishisayo.Amapayipi ensimbi agingqelwe angenamthungo, ukujiya kodonga lwepayipi lensimbi elingenamthungo eligoqelwe ngokubanda ngokuvamile lincane kunalelo lamapayipi ensimbi angenamthungo agingqiwe ekhabhoni, kodwa ubuso bubukeka bukhanya.Ingaphezulu le-hot-rolled carbon steel tube lilukhuni uma liqhathaniswa.Inqubo yokukhiqiza eyinhloko eyindilinga yeshubhu elingenalutho→ukushisa→ukubhoboza→ukugingqika kwe-skew kwama-roll amathathu, ukugingqika okuqhubekayo noma ukukhushulwa→ukususwa kweshubhu→usayizi (noma ukuncishiswa kwedayimitha)→ukupholisa→ukuqondisa→ukuhlola okokusebenza kwamanzi (noma ukutholwa kwamaphutha)→ukumaka→umtapo wolwazi wokufaka.
| I-ASTM A53/ASME SA53 | Uhlobo S | Uhlobo E | Uhlobo F | |||
| (okungenamthungo) | (ashiselwe ukumelana nogesi) | (ipayipi elishiselwe esithandweni) | ||||
| Ibanga A | Ibanga B | Ibanga A | Ibanga B | Ibanga A | ||
| Ikhabhoni max.% | 0.25 | 0.30* | 0.25 | 0.30* | 0.3 | |
| I-Manganese % | 0.95 | 1.2 | 0.95 | 1.2 | 1.2 | |
| Phosphorous, max.% | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | |
| Isibabule, ubuningi.% | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | |
| Ithusi, ubuningi.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Nickel, max.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| I-Chromium, ubuningi.% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
| I-Molybdenum, i-max.% | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | |
| Vanadium, max.% | 0.08 | 0.08 | 0.08 | 0.08 | ||
| *Ekuncishisweni ngakunye okungaphansi kuka-0.01% ngaphansi kwesilinganiso esiphezulu sekhabhoni esishiwo, ukunyuka kwe-manganese ngo-0.06% ngaphezu komkhawulo oshiwo kuzovunyelwa kuze kufike ku-1.65% (akusebenzi ku-SA53). | ||||||
| Izidingo ze-Tensile | I-Seamless futhi i-Electric-resistance-welded | I-Continuous-Welded | |
| Ibanga A | Ibanga B | ||
| Amandla Okuqina, min., psi | 48,000 | 60,000 | 45,000 |
| Isivuno Amandla, min., psi | 30,000 | 35,000 | 25,000 |
1. Inqubo yokukhiqiza eyinhloko yepayipi lensimbi elingenamthungo eligoqiwe elishisayo (inqubo yokuhlola enkulu):
Ukulungiswa kweshubhu elingenalutho nokuhlola→ukushisisa okungenalutho→ukubhoboza→ukugoqeka kweshubhu→ukushisisa kabusha kwensimbi→okulungisiwe (kwehlisiwe) ububanzi→ukwelashwa kokushisa △→ukuqondisa amashubhu okuqediwe→ukuqeda→ukuhlola (okungonakali, okungokomzimba namakhemikhali, ukuhlolwa kwe-Taiwan)→indawo yokugcina impahla
2. Inqubo yokukhiqiza eyinhloko yamapayipi ensimbi angenamthungo (adonswe) abandayo:
Ukulungiselela ibhilidi→ukugcoba ukukha →ukugoqeka okubandayo (umdwebo)→ukwelapha ukushisa→ukuqondisa→ukuqeda→ukuhlola
