Low-temperature seamless steel yeeb nkab yog cov yeeb nkab khoom tshwj xeeb uas siv los thauj cov dej los yog roj hauv qhov kub thiab txias. Nws muaj cov nram qab no zoo thiab nta:
1. Nws muaj qhov kub thiab txias tsis zoo thiab tuaj yeem ua haujlwm ruaj khov rau lub sijhawm ntev hauv qhov chaw kub tsis tshua muaj qis dua -196 degree ;
2. Nws muaj cov yam ntxwv ntawm kev kub siab tsis kam thiab siab precision, thiab haum rau lub sijhawm uas muaj kev kub siab thiab siab precision;
3. Vim hais tias nws yog seamless steel yeeb nkab, nws sab hauv yog du, tsis kam yog me me, thiab cov kua dej thauj mus los yog siab;
4. Nws muaj kev tiv thaiv corrosion zoo heev thiab tuaj yeem hloov mus rau ntau hom tshuaj lom neeg thiab lub zog hluav taws xob ib puag ncig.
ASTM A333 seamless steel yeeb nkab
Cov qauv zoo tshaj plaws rau cov yeeb nkab tsis muaj qhov kub thiab txias yog ASTM A333. ASTM A333 tsis tshua muaj kub seamless carbon steel yeeb nkab yog cov khoom siv steel yeeb nkab uas muaj cov khoom zoo heev thiab dav siv ntau yam. Txawm hais tias tus nqi siab dua, nws muaj kev ua tau zoo dua hauv qhov kub thiab txias. Yog li ntawd, thaum xaiv cov ntaub ntawv steel yeeb nkab, nws daim ntawv thov teb thiab kev ua haujlwm yuav tsum tau txiav txim siab tag nrho.
ASTM A333 Gr6 tsis tshua muaj kub yeeb nkab yog ib hom kev lag luam yeeb nkab, haum rau seamless steel kav ntawm -45 degree ~ -195 degree tsis tshua muaj kub siab siab hlab ntsha kav thiab kub kub exchanger kav.
Impact test:
Cov kav dej kub tsis tshua muaj cov pa roj carbon steel tau muab rau hauv cov qauv txheej txheem thiab ib txwm raug rau Charpy qhov kev ntsuam xyuas ntawm qhov kub thiab txias kom ntseeg tau tias cov khoom ua tau raws li qhov ntsuas kub tau teev los ntawm tus qauv (cov roj carbon steel kub txwv rau A333 kav).
Mechanical xeem:
Kev ntsuam xyuas cov cuab yeej cuab tam ntawm cov kav dej kub qis carbon steel yuav tsum tau ua raws li cov cai hauv qab no:
Transverse/Longitudinal Tension/Plat/Hardness/Bend: Tested on 5% of the pipes in every treatment batch. Rau cov khoom me me, tsawg kawg ib lub yeeb nkab yuav tsum tau sim. Rau cov ntaub ntawv kub kho nyob rau hauv ib tug tas mus li txheej txheem, kev ntsuam xyuas yuav tsum tau ua nyob rau hauv ib tug txaus tus naj npawb ntawm cov raj los ua 5% ntawm cov batch, tab sis nyob rau hauv tsis muaj tsawg tshaj li 2 raj.
Hydrostatic / Impact / Single Notch Bar Impact: yuav tsum tau ua rau txhua qhov cua sov hauv kev kho cua sov ntawm cov qauv coj los ntawm cov yeeb nkab tiav.
| Qib | F degree | C degree |
| ASTM A333 Qib 1 | -50 | -45 |
| ASTM A333 Qib 3 | -150 | -100 |
| ASTM A333 Qib 4 | -150 | -100 |
| ASTM A333 Qib 6 | -50 | -45 |
| ASTM A333 Qib 7 | -100 | -75 |
| ASTM A333 Qib 8 | -320 | -195 |
| ASTM A333 Qib 9 | -100 | -75 |
| ASTM A333 Qib 10 | -75 | -60 |
