Gwaro Rakazara reSAWH reTube: Pipe yeSimbi yeA252 Giredhi 1 Yekushandisa Oiri neGasi
1. Nzwisisa pombi yeSAWH:
Mapaipi eSAWHAnogadzirwa nemaplate esimbi akarongeka nesimbi. Mapepa acho anogadzirwa kuita machubhu uye anosungirirwa uchishandisa nzira yekusanganisa arc pasi pemvura. Nzira iyi yekusanganisa inovimbisa kusanganisa kwakasimba, kunoramba kuripo muhurefu hwese hwepombi, zvichiita kuti irambe yakasimba kune zvinhu zvinokonzeresa kushushikana kwekunze zvakaita sekukanganiswa nekumanikidzwa. Mapaipi aya anozivikanwa nekugona kwawo kutakura mutoro zvakanyanya uye kusimba kwechimiro, zvichiita kuti ave akakodzera kutakura mafuta negasi.
2. Pombi yesimbi yegiredhi 1 yeA252:
A252 GRADE 1 imhando yemapaipi esimbi akagadzirirwa kushandiswa pakumanikidzwa. Mapaipi aya anogadzirwa nesimbi yeA252, ine hunhu hwakanaka hwemakanika uye simba rayo rekudhonza. Pombi yesimbi yeA252 GRADE 1 inoshandiswa zvakanyanya nekuda kwekugona kwayo kutsungirira kumanikidzwa kwakanyanya uye kuramba ngura uye kushanduka munzvimbo dzine mafuta negasi.
Zvivakwa zveMechanical
| giredhi resimbi | simba shoma regoho | Simba rekusimba | Kureba kushoma | Simba shoma remagetsi | ||||
| Ukobvu hwakatarwa | Ukobvu hwakatarwa | Ukobvu hwakatarwa | patembiricha yekuyedzwa kwe | |||||
| 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 | - | - | |||||
3. Mabhenefiti epombi yesimbi yeA252 giredhi 1:
a) Simba uye Kugara Kwenguva refu:Pombi yesimbi yeA252 GRADE 1Yakasimba uye inogara kwenguva refu, inogona kutsungirira zvinhu zvinorema uye yakakodzera masisitimu ekufambisa mafuta negasi. Simba rayo guru rekudhonza rinovimbisa kugara kwenguva refu uye rinoderedza zvinodiwa pakugadzirisa.
b) Kusagona ngura: Mapaipi emafuta negasi anowanzo ngura nekuda kwezvinhu zvakakomba zvakatipoteredza. Pombi yesimbi yeA252 GRADE 1 ine imwe coating inodzivirira ngura, yakaita sefused-bonded epoxy (FBE), kuti irambe yakasimba uye iwedzere hupenyu hwayo hwekushanda.
c) Kuchinjika: Mapaipi eSAWH anogona kugadzirwa muhukuru hwakasiyana-siyana uye dhayamita kuti asvike pazvinodiwa zvepurojekiti. Kuchinjika uku kunoita kuti kuiswa kuve nyore pasina chikonzero chekubatanidza majoini akawanda, zvichideredza njodzi yekudonha kwemvura.
d) Inochengetedza mutengo: Pombi yesimbi yeA252 Grade 1 inopa mhinduro isingadhuri yemapaipi emafuta negasi. Nguva yavo yekushanda kwenguva refu uye zvinodiwa pakugadzirisa zvishoma zvinoderedza mari yekushanda nekufamba kwenguva.
Kuumbwa kweMakemikari
| Giredhi resimbi | Rudzi rwekubvisa oxidation a | % nehuremu, huwandu hwepamusoro | ||||||
| Zita resimbi | Nhamba yesimbi | 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. Nzira yekubvisa oxidation inotsanangurwa seinotevera: FF: Simbi yakafa zvizere ine zvinhu zvinosunga nitrogen muhuwandu hwakakwana kuti isunge nitrogen iripo (semuenzaniso 0,020% yeAl yose kana 0,015% yeAl inonyungudika). b. Kukosha kwakanyanya kwenitrogen hakushandi kana makemikari ari muchikamu ichi achiratidza huwandu hweAl hushoma hwe0,020% nechiyero cheAl/N che2:1, kana kana paine zvimwe zvinhu zveN-binding zvakakwana. Zvinhu zveN-binding zvinofanira kunyorwa muGwaro reKuongorora. | ||||||||
4. Kushandiswa kwepombi yesimbi yeA252 giredhi 1:
Pombi yesimbi yeA252 Grade 1 ine mashandisirwo akasiyana-siyana muindasitiri yemafuta negesi, kusanganisira:
a) Mapaipi ekufambisa: anoshandiswa kutakura mafuta asina kucheneswa, gasi rechisikigo nezvimwe zvigadzirwa zvepeturu kubva kuminda yekugadzira kuenda kunzvimbo dzekuchenesesa nedzekugovera.
b) Kuchera Kunze Kwegungwa: Mapaipi eSAWH anoshandiswa mukuchera mafuta negasi kunze kwegungwa. Kusagona kwavo ngura uye kugona kwavo kudzvanywa zvakanyanya kunoita kuti akwanise kuongororwa mugungwa rakadzama.
c) Kuchenesa: Mapaipi esimbi eA252 GRADE 1 anoshandiswa zvakanyanya mukuchenesa mafuta akagadziriswa uye zvigadzirwa zvepeturu.
Mukupedzisa:
Mapaipi eSAWH, kunyanya mapaipi esimbi eA252 GRADE 1, anoita basa rakakosha mupombi yemafuta negasiindasitiri. Simba radzo, kugara kwenguva refu, uye kuramba ngura zvinoita kuti dzive sarudzo yakavimbika yekushandiswa kwakasiyana-siyana. Kunzwisisa mabhenefiti emapombi eSAWH uye hunhu hwadzo chaihwo kunogona kubatsira kuona kuti oiri negasi zvinofambiswa zvakanaka ukuwo zvichideredza mari yekugadzirisa uye kuwedzera kushanda zvakanaka kweprojekiti.
