ASTM A 53 npog seamless thiab welded steel yeeb nkab nrog nominal phab ntsa thickness.Cov txheej txheem saum npoo feem ntau yog xim dub thiab ASTM A53 yeeb nkab (tseem hu ua ASME SA53 yeeb nkab) yog npaj rau kev siv tshuab thiab kev siv siab thiab kuj tseem siv tau rau kev siv tib yam hauv chav dej, dej, roj thiab cua.Nws yog qhov tsim nyog rau kev sib txuas thiab kev tsim cov haujlwm uas muaj xws li coiling, dabtsi yog khoov, thiab flanging.A53 seamless steel raj yog cov khoom ntawm American standard steel yeeb nkab.Cov txheej txheem tseem ceeb ntawm A53 seamless steel hlab yog muab faib ua cov duab txias thiab kub dov.Qhov sib txawv tseem ceeb ntawm ob yog tias cov txheej txheem tsim khoom ntawm cov kav dej txias seamless steel feem ntau yog qhov nyuaj tshaj li qhov kub dov, thiab cov tsos ntawm txias dov steel seamless yeeb nkab yog luv dua li ntawm kub dov.Rolled steel seamless kav, phab ntsa thickness ntawm txias-dov seamless carbon steel yeeb nkab yog feem ntau me dua li ntawm kub dov seamless carbon steel kav, tab sis qhov saum npoo zoo li ci dua.Qhov saum npoo ntawm kub dov carbon steel raj yog qhov ntxhib heev.Cov txheej txheem tsim khoom tseem ceeb puag ncig lub raj tsis muaj → cua sov → tho → peb-yob skew dov, nruam dov los yog extrusion → raj tshem tawm → sizing (los yog txoj kab uas hla txo) → txias → straightening → hydraulic test (los yog flaw detection) → marking → insertion library.
| ASTM A53 / ASME SA53 | Hom S | Hom E | Hom F | |||
| (seamless) | (electric resistance welded) | (Qhov cub-welded yeeb nkab) | ||||
| Qib A | Qib B | Qib A | Qib B | Qib A | ||
| Cov pa roj carbon max.% | 0.25 | 0.30 * | 0.25 | 0.30 * | 0.3 | |
| Manganese% | 0.95 ib | 1.2 | 0.95 ib | 1.2 | 1.2 | |
| Phosphorus, max.% | 0.05 Nws | 0.05 Nws | 0.05 Nws | 0.05 Nws | 0.05 Nws | |
| Sulfur, max.% | 0.045 ib | 0.045 ib | 0.045 ib | 0.045 ib | 0.045 ib | |
| Tooj liab, 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 ib | 0.08 ib | 0.08 ib | 0.08 ib | ||
| * Rau txhua qhov kev txo qis qis dua 0.01% qis dua cov pa roj carbon siab tshaj plaws, qhov nce ntawm 0.06% manganese saum toj no qhov siab tshaj plaws yuav raug tso cai mus txog qhov siab tshaj ntawm 1.65% (tsis siv rau SA53). | ||||||
| Tensile Requirements | Seamless thiab Hluav taws xob tiv taus-welded | Nruam-Welded | |
| Qib A | Qib B | ||
| Tensile zog, min., psi | 48,000 ib | 60,000 | 45,000 ib |
| Yield zog, min., psi | 30,000 | 35,000 | 25,000 |
1. Cov txheej txheem tseem ceeb ntawm kub dov seamless steel yeeb nkab (cov txheej txheem kev tshuaj xyuas tseem ceeb):
Kev npaj thiab tshuaj xyuas → raj dawb paug cua sov → tho → raj dov → steel reheating → tsau (txo) txoj kab uas hla → kho cua sov △ → tiav lub raj ncaj → tiav → tshuaj xyuas (tsis muaj kev puas tsuaj, lub cev thiab tshuaj lom neeg, Taiwan tshuaj xyuas) → warehousing
2. Cov txheej txheem tseem ceeb ntawm cov khoom txias-kuav los tiag (kos) seamless steel kav:
Billet npaj → pickling lubrication → txias dov (kos duab) → tshav kub kho → straightening → tiav → tshuaj xyuas
