Mu myaka etaano egiyise, omuze gw’okukulaakulanya payipu eziweweevu ez’ekyuma ekitali kizimbulukuse gubadde mulungi nnyo. Ka kibeere nti tekinologiya wa kigero ki, omutindo, n’okufulumya ebintu, wabaddewo enkulaakulana ennene naddala ekifo kyayo eky’obwetaavu kigenda kigaziwa mpolampola. Okugatta ku ekyo, nga tekinologiya wa payipu eya welded ekoleddwa mu kyuma ekitali kizimbulukuse yeeyongera okukula, esobola okukyusa mpolampola payipu ezitaliimu kyuma ezitaliimu buwuka mu mirimu mingi, gamba nga: ebyuma ebiwanyisiganya ebbugumu tubes, medium ne low pressure boiler tubes, n’ebirala.
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Ebifaananyi by’okufulumya eby’ekyuma ekitali kizimbulukuse welded payipu: ebyuma ebikola ekitangaala, okuteeka ssente entono, sipiidi y’okuzimba ey’amangu, enkola ennyangu ey’okuweta, ekifo ekigazi eky’okulaga, obutuufu obw’ekipimo ekinene, okukyama kw’obuwanvu bw’ekisenge obutono, okuseeneekerevu kungulu n’omuwendo gw’amakungula amangi. Mu mbeera y’okufulumya mu bungi, ssente za payipu eziweereddwayo zisukka ebitundu 20% okusinga ku za payipu ezitaliimu buzibu. Mu myaka egiyise, enkola ya 'welding-cold rolling' eyakolebwa mu China okufulumya ttanka z'ekyuma ekitali kizimbulukuse kwe kukozesa coils eziyiringisibwa mu nnyonta okusala n'okubumba okusinziira ku bipimo, weld them into tubes by multi-gun argon arc welding machine, and then cold-roll (pull) okufuula performance indexes of the weld can be basically as the same the same the base, and the material. N’olwekyo, ebirungi ebiri mu kukyusa payipu ezitaliiko musono ezitaliimu buwuka ne ziteekebwamu payipu eziweweevu ez’ekyuma ekitali kizimbulukuse zeeyongera okweyoleka.
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Ebirungi ebiri mu kukola payipu eziweweevu ez’ekyuma ekitali kizimbulukuse: Okusookera ddala, mu nkola y’okufulumya payipu eziweta ekyuma ekitali kizimbulukuse, omubiri gwa payipu gujja kunyigirizibwa kyenkanyi, ate oluvannyuma oluvannyuma lw’okuzimbulukuka okusaanuuka okutangaavu okutangaavu okutangaavu, kungulu kufuuka kwa kimpowooze nnyo, era ekifo ekiweweevu si kyangu kugerageranya, n’ebintu ebiziyiza okunyiga. Kino kiyamba okusaasaanya ebbugumu era tekikwetaagisa kuyonja nnyo, okukekkereza obudde, okufuba ne ssente. Ekirala, payipu eya welded kye kintu ekikoleddwa mu buziba eky’epulaati, era enkizo yaakyo ey’obuwanvu bw’ekisenge ekimu tefaanagana. Mu kiseera kye kimu, kiyinza okuba nga kya sayizi ya kimpowooze, nga kirimu obutuufu obw’amaanyi. Ekyokusatu, ekintu eky’ekyuma ekitali kizimbulukuse kirina engeri z’okuziyiza okukulukuta n’obulamu obw’ekiseera ekiwanvu.
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Embeera eriwo kati ey’ebintu ebikozesebwa mu kukola payipu eziweweevu mu kyuma ekitali kizimbulukuse: Obusobozi bw’okukola payipu ya China ey’ekyuma ekitali kizimbulukuse welded tebukwatagana na bwetaavu bwa katale k’omunda mu ggwanga. Ebisinga ku bikozesebwa eby’enkola ya payipu ya payipu ekoleddwa mu kyuma ekitali kizimbulukuse ebiriwo tebituukiridde, gamba ng’obutaba na bikozesebwa mu kulongoosa mu bbugumu n’okugezesa ku yintaneeti, olwo obusobozi bw’okufulumya yuniti ne buwa omuzannyo omujjuvu, okutwalira awamu busobola okukola ttaabu ez’okuyooyoota eza bulijjo zokka, era akatale k’ekyuma ekitaliimu buwuka eky’omutindo ogwa wansi n’eky’omutindo ogwa wansi nga guyooyooteddwa mu ngeri ey’ekikugu gusukka ku muwendo gw’ebintu ebiweebwayo; Ebipipa ebiweereddwa eby’amakolero eby’omutindo ogwa waggulu, gamba nga ttanka z’ebyuma n’ebyuma ebiwanyisiganya ebbugumu, bye bikozesebwa ebitonotono bye bisobola okukolebwa, naye obusobozi bw’okufulumya tebumala nnyo. Hangao Tech (Ebyuma bya Seko) SZG-JM Series Precision Ekyuma ekitali kizimbulukuse welded payipu production line egonjoola ekizibu kino. Layini yonna ey’okufulumya erimu enkola eziddiriŋŋana ng’okukola welding, inner welding seam leveling, welding seam grinding, bright annealing, n’okusala obunene. Enkola y’okufuga ebyuma ebigezi (intelligent electronic control system) ekwataganya enkola ya buli kitundu, n’etereeza obulungi ate nga ekendeeza ku kukozesa amaanyi amalungi.
Payipu eya welded esobola okukola ku byuma ebiwanyisiganya ebbugumu?
1. Tubes z’ebintu eby’omutindo ogwa waggulu zisoboka .
Tubu y’okuwanyisiganya ebbugumu kitundu kya bbugumu ekyetaagisa eky’ebyuma ebiwanyisiganya ebbugumu mu ttanka ne ttaayi, era okutwalira awamu ttanka y’okuwanyisiganya ebbugumu esunsulwa okusinziira ku puleesa n’ekisenge ky’amazzi. Kati ekimu ku bitategeeragana mu kulonda ttaabu z’okuwanyisiganya ebbugumu ku katale kwe kuba nti ebyuma ebiweweevu ebiweweevu tebisobola kukozesebwa nga tubes ezikyusa ebbugumu, naye GB / 151-1999 eraga bulungi nti stainless steel welded tubes zisobola okulondebwa nga tube side pressure eri ≤6.4MPa. Naddala kati ng’enkola y’okufulumya payipu eziweweevu ez’ekyuma ekitali kizimbulukuse kati ekuze nnyo, esobola okutuukiriza mu bujjuvu ebyetaago by’ebintu ebiwanyisiganya ebbugumu mu bulambalamba, era eraga ebirungi byayo eby’enjawulo.
2. Enkola y’okufulumya ekuze, austenitic stainless steel welded payipu y’egenda okusooka okulonda .
Okuva ttanka y’okuwanyisiganya ebbugumu bwe kikola ekifo eky’okutambuza ebbugumu eky’ekikyusa ebbugumu, obunene bwa ttanka y’okuwanyisiganya ebbugumu bulina kinene kye kikola ku kutambuza ebbugumu. Bw’okozesa obuyumba obutono obwa dayamita, ekitundu ky’okuwanyisiganya ebbugumu ku buli yuniti ya voliyumu y’ekikyusa ebbugumu kiba kinene, ebyuma biba bitono nnyo, ekyuma ekikozesebwa ku buli yuniti y’ekifo eky’okutambuza ebbugumu kiba kitono, era n’omugerageranyo gw’okutambuza ebbugumu nagwo guba mungi. Wadde nga kizibu okukola, okukozesa ebyuma ebikozesebwa mu kukola ebyuma ebitali bimenyamenya (austenitic stainless steel welded tubes) kuba ebipipa ebiwanyisiganya ebbugumu bisobola okwewala ebizibu ebyo waggulu. Kubanga austenitic stainless steel welded tubes zirina obulungi obuziyiza okukulukuta n’ebitundu ebiseeneekerevu, era enkola y’okufulumya ekulidde, kale austenitic stainless steel welded tubes ze zisooka okulonda ku ttanka eziwanyisiganya ebbugumu. Ebintu ebiyinza okukolebwako Hangao Tech (Ebyuma bya Seko) layini y’okufulumya payipu eziweweevu eza SZG-JM series mulimu: ekyuma ekitali kizimbulukuse, austenite, ferrite, titanium alloy ne dual phase steel, nga zino zikola ebintu bingi nnyo era nga zisobola okuteekebwawo n’okutereezebwa okusinziira ku biragiro bya bakasitoma.
