Mapaipi achitsulo cha kaboni cholumikizidwa mozungulira cha mapaipi a gasi wachilengedwe pansi pa nthaka - EN10219
Chimodzi mwa zabwino zazikulu zachitoliro chachitsulo cha kaboni chozungulira chozungulirandi kuthekera kopanga mapaipi a mainchesi osiyanasiyana pogwiritsa ntchito mipiringidzo ya mulifupi womwewo. Izi ndizothandiza makamaka pa ntchito zomwe zimafuna mipiringidzo yopapatiza yachitsulo kuti apange mapaipi achitsulo akuluakulu. Njira yatsopano yopangira iyi imatsimikizira kuti mapaipi opangidwawo si olimba komanso olimba okha, komanso ndi abwino nthawi zonse.
Mapaipi achitsulo cha kaboni olumikizidwa mozungulira amapangidwa mwapadera kuti akhazikitse mapaipi a gasi wachilengedwe pansi pa nthaka ndipo amatsatira zofunikira kwambiri zaEN10219Muyezo uwu umafotokoza zofunikira zaukadaulo zoperekera magawo obowoka opangidwa ndi zitsulo zopanda aloyi ndi zitsulo zopyapyala. Chifukwa chake, chitolirochi ndi choyenera kugwiritsidwa ntchito m'mapaipi a gasi wachilengedwe pansi pa nthaka komwe kukana dzimbiri ndi kulimba kwa kapangidwe kake ndikofunikira kwambiri.
Katundu wa Makina
| kalasi yachitsulo | mphamvu yocheperako yopezera phindu Mpa | Kulimba kwamakokedwe | Kutalikirana kochepa % | Mphamvu yochepa kwambiri J | ||||
| Kunenepa kotchulidwa mm | Kunenepa kotchulidwa mm | Kunenepa kotchulidwa mm | kutentha koyesedwa kwa | |||||
| 16 | >16≤40 | <3 | ≥3≤40 | ≤40 | -20℃ | 0℃ | 20℃ | |
| S235JRH | 235 | 225 | 360-510 | 360-510 | 24 | - | - | 27 |
| S275J0H | 275 | 265 | 430-580 | 410-560 | 20 | - | 27 | - |
| S275J2H | 27 | - | - | |||||
| S355J0H | 365 | 345 | 510-680 | 470-630 | 20 | - | 27 | - |
| S355J2H | 27 | - | - | |||||
| S355K2H | 40 | - | - | |||||
Kapangidwe ka Mankhwala
| Kalasi yachitsulo | Mtundu wa de-oxidation a | % ndi kulemera, kuchuluka kwakukulu | ||||||
| Dzina lachitsulo | Nambala yachitsulo | C | C | Si | Mn | P | S | Nb |
| S235JRH | 1.0039 | FF | 0,17 | — | 1,40 | 0,040 | 0,040 | 0.009 |
| S275J0H | 1.0149 | FF | 0,20 | — | 1,50 | 0,035 | 0,035 | 0,009 |
| S275J2H | 1.0138 | FF | 0,20 | — | 1,50 | 0,030 | 0,030 | — |
| S355J0H | 1.0547 | FF | 0,22 | 0,55 | 1,60 | 0,035 | 0,035 | 0,009 |
| S355J2H | 1.0576 | FF | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | — |
| S355K2H | 1.0512 | FF | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | — |
| a. Njira yochotsera poizoni m'thupi imatchulidwa motere: FF: Chitsulo chophwanyika bwino chokhala ndi zinthu zomangira nayitrogeni mu kuchuluka kokwanira kumangirira nayitrogeni yomwe ilipo (monga osachepera 0,020% ya Al yonse kapena 0,015% ya Al yosungunuka). b. Mtengo wapamwamba kwambiri wa nayitrogeni sugwira ntchito ngati mankhwala akuwonetsa kuchuluka kwa Al komwe kuli 0,020% ndi chiŵerengero chochepa cha Al/N cha 2:1, kapena ngati pali zinthu zina zokwanira zomangira N. Zinthu zomangira N ziyenera kulembedwa mu Chikalata Chowunikira. | ||||||||
Kuwonjezera pa kusinthasintha kwake popanga mapaipi achitsulo akuluakulu, mapaipi achitsulo cha kaboni olumikizidwa ndi spiral ali ndi ubwino wina wambiri. Ukadaulo wake wolumikizira spiral umatsimikizira kuti chitolirocho chili ndi malo osalala mkati, kuchepetsa kutsika kwa kuthamanga kwa mpweya ndikukweza mawonekedwe a kayendedwe ka madzi. Izi ndizofunikira kwambiri pakugwiritsa ntchito mapaipi a gasi wachilengedwe, komwe kuyenda bwino komanso kosalephereka ndikofunikira kuti ntchito iyende bwino.
Kuphatikiza apo, chitoliro chachitsulo cha kaboni cholumikizidwa ndi spiral chimalimbana ndi dzimbiri, zomwe zimapangitsa kuti chikhale choyenera kuyikidwa pansi pa nthaka komwe kukhudzana ndi chinyezi ndi nthaka kungawononge umphumphu wa chitolirocho. Kapangidwe kake kolimba komanso zinthu zokhazikika zimapangitsa kuti chikhale choyenera kugwiritsidwa ntchito kwa nthawi yayitali m'malo ovuta.
Kugwiritsa ntchito chitsulo cha kaboni chapamwamba kwambiri kumaonetsetsa kuti mapaipi ali ndi mphamvu zabwino kwambiri zamakanika, kuphatikizapo mphamvu yayikulu yokoka komanso kukana kugunda. Izi zimapangitsa kuti ikhale chisankho chodalirika chachitoliro cha gasi lachilengedwe pansi pa nthakamalo oyikamo mapaipi, chifukwa mapaipi akhoza kukhudzidwa ndi katundu wakunja komanso kuwonongeka komwe kungachitike.
Mwachidule, mapaipi achitsulo cha kaboni opangidwa ndi spiral welded ndiye chisankho chabwino kwambiri chogwiritsira ntchito mapaipi a gasi wachilengedwe pansi pa nthaka. Njira yake yatsopano yopangira imalola kupanga mapaipi achitsulo akuluakulu ochokera ku zingwe zopapatiza zachitsulo, kuonetsetsa kuti khalidwe ndi kulimba nthawi zonse. Chitolirochi chimakwaniritsa zofunikira za muyezo wa EN10219 ndipo chili ndi kukana dzimbiri bwino, malo osalala mkati mwake komanso mphamvu zamphamvu zamakanika, zomwe zimapangitsa kuti chikhale choyenera kugwiritsidwa ntchito modalirika kwa nthawi yayitali poyika mapaipi a gasi wachilengedwe pansi pa nthaka.







