Cold Formed Welded Structural For Fire Pipe Line
In kubanda kwakheka ashiselwe kwesakhiwoizicelo, Kuvunguza umthungo ashiselwe ipayipi kubalulekile ekwakheni izakhiwo eziqinile futhi ezinokwethenjelwa.Lawa mapayipi ngokuvamile enziwa ngensimbi yezinga eliphezulu futhi angakwazi ukumelana nemithwalo esindayo, okuwenza alungele amabhuloho, izakhiwo kanye neminye imiklamo yengqalasizinda.Impahla Mechanical
izinga lensimbi | amandla amancane esivuno | Amandla aqinile | Ubude obuncane | Amandla omthelela amancane | ||||
Mpa | % | J | ||||||
Ugqinsi olucacisiwe | Ugqinsi olucacisiwe | Ugqinsi olucacisiwe | at test lokushisa | |||||
mm | mm | mm | ||||||
<16 | >16≤40 | <3 | ≥3≤40 | ≤40 | -20 ℃ | 0℃ | 20℃ | |
I-S235JRH | 235 | 225 | 360-510 | 360-510 | 24 | - | - | 27 |
I-S275J0H | 275 | 265 | 430-580 | 410-560 | 20 | - | 27 | - |
I-S275J2H | 27 | - | - | |||||
I-S355J0H | 365 | 345 | 510-680 | 470-630 | 20 | - | 27 | - |
I-S355J2H | 27 | - | - | |||||
I-S355K2H | 40 | - | - |
Ukwakheka Kwamakhemikhali
Ibanga lensimbi | Uhlobo lwe-de-oxidation a | % ngesisindo, esiphezulu | ||||||
Igama lensimbi | Inombolo yensimbi | C | C | Si | Mn | P | S | Nb |
I-S235JRH | 1.0039 | FF | 0,17 | - | 1,40 | 0,040 | 0,040 | 0.009 |
I-S275J0H | 1.0149 | FF | 0,20 | - | 1,50 | 0,035 | 0,035 | 0,009 |
I-S275J2H | 1.0138 | FF | 0,20 | - | 1,50 | 0,030 | 0,030 | - |
I-S355J0H | 1.0547 | FF | 0,22 | 0,55 | 1,60 | 0,035 | 0,035 | 0,009 |
I-S355J2H | 1.0576 | FF | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | - |
I-S355K2H | 1.0512 | FF | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | - |
a.Indlela ye-deoxidation ikhethwe kanje: | ||||||||
FF: Insimbi ebulawe ngokuphelele equkethe izakhi zokubopha i-nitrogen ngamanani anele ukuhlanganisa i-nitrogen etholakalayo (isb. min. 0,020 % isiyonke i-Al noma i-0,015 % e-soluble Al). | ||||||||
b.Inani eliphakeme kakhulu le-nitrogen alisebenzi uma ukwakheka kwamakhemikhali kubonisa inani elincane eliphelele lokuqukethwe kwe-Al elingu-0,020 % elinesilinganiso esincane se-Al/N esingu-2:1, noma uma kukhona ezinye izakhi ezanele zokubopha i-N.Izinto ezibophezela i-N zizorekhodwa kuMqulu Wokuhlola. |
Ngaphezu kwalokho, ekuvikelweni komliloamapayipi, ukusetshenziswa kwamapayipi ashiselwe i-spiral seam kubalulekile ukuze kuqinisekiswe ukuphepha nokwethembeka kohlelo.Lawa mapayipi aklanyelwe ngokukhethekile ukumelana nokushisa okuphezulu nokucindezela futhi afaneleka ukusetshenziswa ezinhlelweni zokuvikela umlilo.Ukwakhiwa okushiselwe kwepayipi lomthungo elivunguzayo kuqinisekisa ukuthi alivuzi futhi ligcina ubuqotho besakhiwo ngisho nangaphansi kwezimo ezimbi kakhulu, okulenza libe yingxenye ebalulekile yokuvikela umlilo nezinhlelo zokucisha umlilo.
Enye yezinzuzo eziyinhloko zeKuvunguza umthungo ipayipi ashiselweukuguquguquka kwayo kanye nokuvumelana nezimo ezihlukahlukene zezinhlelo zokusebenza.Lawa mapayipi angenziwa ngobubanzi obuhlukahlukene nobukhulu ukuze ahlangabezane nezidingo ezithile zephrojekthi.Ngaphezu kwalokho, zingambozwa ngezinto zokuzivikela ukuze zithuthukise ukumelana nokugqwala futhi zandise impilo yazo yesevisi, zizenze zifanelekele ukusetshenziswa ezindaweni nezimo ezihlukahlukene.
Amapayipi ahlanganisiwe we-Spiral seam anezinzuzo ezicacile uma kuziwa ekufakweni nasekugcinweni.Azisindi futhi ziyavumelana nezimo, okwenza kube lula ukuzithwala nokubamba, ukunciphisa isikhathi sokufakwa nezindleko zabasebenzi.Ukwengeza, ubude bayo obude, obuqhubekayo bunciphisa isidingo sokuxhuma okwengeziwe, kunciphisa ubungozi bokuvuza kanye nokuqinisekisa uhlelo lwamapayipi olusebenza kahle futhi oluthembekile.
Sengiphetha, ipayipi elihlanganisiwe le-spiral seam liyingxenye ebalulekile ezimbonini ezahlukahlukene, ikakhulukazi ezakhiweni ezishiselwe ezibandayo kanyeumugqa wepayipi lomliloizicelo.Ukwakhiwa kwayo okuhlala isikhathi eside, ukusebenza okuphezulu nokuvumelana nezimo kuyenza ibe yinketho yokuqala konjiniyela, osonkontileka nabaphathi bephrojekthi.Kungakhathaliseki ukuthi wakha izakhiwo eziqinile noma uklama izinhlelo zokuvikela umlilo eziphephile nezithembekile, amapayipi ashiselwe ngomthungo ayi-spiral ayisixazululo esibalulekile ezidingweni zengqalasizinda yesimanje kanye nezimboni.