ASTM A179 Cov khoom lag luam (ASME SA179) yog ib qho uas tsis tshua muaj carbon txias-draw seamless steel raj rau siv nyob rau hauv tubular tshav kub exchangers, condensers, thiab zoo xws li cov tshav kub hloov ntaub ntawv thov.
ASTM A179 thiab ASME SA179 yog ob tus qauv uas sib npaug tag nrho.Rau qhov yooj yim, ASTM A179 yog siv hauv qab no.
ASTM A179 yog tsim rau steel kav nrog ib txoj kab uas hla ntawm 1/8 "- 3" [3.2mm - 76.2mm].
Botop Steelyog ib qho seamless steel yeeb nkab stockist los ntawm Tuam Tshoj, muab koj xaiv loj ntawm ASTM A179 / ASME SA179 txias-draw seamless steel kav.
Peb mob siab rau muab peb cov neeg siv khoom nrog cov khoom zoo tshaj plaws thiab kev pabcuam kom ntseeg tau tias koj cov haujlwm ua haujlwm tau zoo.Xaiv Botop Steel, thiab xaiv tus khub txhim khu kev qha.
Peb twb tau hais tias A179 yog tsim los siv cov txheej txheem kev tsim khoom tsis muaj dej txias.Dab tsi yog cov txheej txheem tshwj xeeb koom nrog hauv kev tsim khoom txias seamless?Thov saib cov txheej txheem khiav hauv qab no.
Hauv ASTM tus qauv,A556kuj tseem siv cov txheej txheem tsim khoom txias-draw seamless tab sis tshwj xeeb rau cov tubular dej rhaub.Cov neeg uas xav paub ntau ntxiv.
Tom qab qhov kawg ntawm kev kos duab txias, cov raj hlau tau kho cua sov ntawm qhov kub ntawm 1200 ° F [650 ° C] lossis siab dua.
| Txuj | C | Mn | P | S |
| ASTM A179 Cov khoom lag luam | 0.06-0.18% | 0.27-0.63% | 0.035% max | 0.035% max |
ASTM A179 tsis tso cai ntxiv ntawm lwm cov khoom rau cov tshuaj muaj pes tsawg leeg.
Lub hardness ntawm lub raj steel yuav tsum tsis pub tshaj 72 HRBW (Rockwell hardness).
| Tensile zog | Yield zog | Elongation | Flattening Test | Flaring Test | Flange Test |
| min | min | hauv 2 nti lossis 50 mm, min | |||
| 47 ksg [325 MPa] | 26 ksg [180 MPa] | 35% | Saib ASTM A450, Tshooj 19 | Saib ASTM A450, Tshooj 21 | Saib ASTM A450, Tshooj 22 |
Txhua lub yeeb nkab yuav tsum raug kuaj xyuas hydraulic los yog, yog tias tus neeg yuav khoom tau teev tseg, kev ntsuas hluav taws xob tsis zoo yuav raug siv los hloov.
Lub raj steel tuav lub siab tsawg kawg yog 5s yam tsis muaj dej.
Kev ntsuas siab yog suav nrog cov qauv hauv qab no:
Inch - Pound Units: P = 32000 t/D
SI Units: P = 220.6t/D
P = hydrostatic test siab, psi lossis MPa;
t = teev phab ntsa thickness, in. or mm;
D = teev sab nraud txoj kab uas hla, in. los yog mm.
Cov nram qab no yog ib qho A179 ntim, thiab kev ntim khoom tuaj yeem muab tau raws li qhov yuav tsum tau ua.
Cov yeeb nkab liab qab, txheej txheej dub ( customized);
6 "thiab hauv qab qhov ntau thiab tsawg Hauv bundles nrog ob lub paj rwb slings, lwm qhov ntau thiab tsawg hauv xoob;
Ob qhov xaus nrog qhov kawg tiv thaiv;
Plain kawg, bevel kawg;
Kos npe.
