Izidingo eziyisisekelo zokubukeka kwepayipi lokushisela

Ngaphambi kwengcindeziiphayiphiyenza ukuhlolwa okungalimazi, ukuhlola okubonakalayo kwerula yokuhlola i-weld kufanele kuhlangabezane nezidingo.Izidingo ezijwayelekile zokubukeka kwepayipi lokushisela ipayipi kanye nekhwalithi ephezulu yamajoyinti ashiselwe kanje: ukushisela kufanele kubukeke ukuma okuhle, ububanzi bohlangothi ngalunye lwe-bevel onqenqemeni olumbozwe ngo-2mm olufanele.Ubude bomlenze we-fillet weld kufanele buhlangabezane nezidingo zokuklama, izinga lokulawulwa kwesici esincane sefomu kufanele libe ukuguquguquka okubushelelezi.

Indawo ehlangene ehlanganisiwe ayivumeli imifantu, ukungabi khona kwe-fusion, i-porosity, i-slag, i-spatter ikhona.Izinga lokushisa lomklamo wamapayipi lingaphansi kwama-degrees angu-29, i-fan rula yensimbi engagqwali eqinile kanye namapayipi ensimbi yengxubevange avame ukuba indawo yokushisela emikhulu, ngaphandle kwe-undercut.I-pipe weld undercut ezinye izinto kufanele zibe zinkulu kuno-0.5mm ukujula, ubude be-undercut obuqhubekayo akumele budlule u-100mm, futhi izinhlangothi zombili ze-weld undercut zikhule ngamaphesenti angu-10 obude obuphelele be-weld.I-Weld surface engekho ngaphansi kwendawo yepayipi.Ukuqiniswa kwe-Weld, Futhi kungabi ngaphezu kuka-3mm, (kuya kububanzi obukhulu bamalunga e-weld on the groove).Amalunga ashiselwe okungalungile odongeni ukujiya akufanele kudlule u-10% futhi kungabi ngaphezu kuka-2mm.

Phezu kokuhlolwa okungabhubhisi

Ipayipi lokucindezela okungaphezulu Isimiso sokukhetha indlela ye-NDT: ipayipi lensimbi kazibuthe kufanele lisetshenziswe ekuhlolweni kwezinhlayiyana kazibuthe;insimbi engeyona i-ferromagnetic kufanele isetshenziswe ekuhlolweni kokungena.Kukhona ukuthambekela kokulibaziseka kokuqhekeka kwamalunga ashiselwe, indawo engaphezulu kufanele kube ukuhlolwa okungabhubhisi kokupholisa ngemuva kokushisela isikhathi esithile;shisa kabusha ukuthambekela kokuqhekeka kwamalunga ashiselwe, indawo engaphezulu kufanele ibe ekuhlolweni okungabhubhisi kanye nokwelashwa kokushisa kwangemva kwe-weld kanye ngayinye.

Ukuhlolwa kwe-ray nokuhlolwa kwe-ultrasonic

Ukuhlolwa kwe-ray kanye nokuhlolwa kwe-ultrasonic yiyona nhloso eyinhloko yepayipi lokucindezela elihlangene lezinqe kanye nokufakwa kwamapayipi amalunga ezinqe.Izindlela ze-NDT ezikhethwe imibhalo yokuklama.I-Titanium, i-aluminium ne-aluminium alloy, i-alloys yethusi neyethusi, amajoyinti ashiselwe ukuthola ama-nickel nama-nickel alloys, futhi kufanele asetshenziswe ezindleleni zokuthola imisebe.Kukhona ukuthambekela kokubambezeleka kokuqhekeka kwe-weld, ukuhlolwa kwayo kwe-ray nokuhlolwa kwe-ultrasonic kufanele kube ngesikhathi esithile sokupholisa ngemuva kokushisela.Lapho inhloko yefolda ngaphakathi kwe-casing ine-weld ye-girth, i-weld kufanele isebenze ukutholwa kwe-ray 100%, imisebenzi yokufihla ingenziwa ngemva kokudlula ukuhlolwa kwengcindezi.Ukuqinisa izindandatho noma ipuleti elithwala embozwe amalunga ashiselwe kufanele kube 100% wokuhlola ipayipi-ray, ngemva kokudlula ke embozwe.Ukuhlolwa kwezinhlinzeko ze-welding ye-seam ephakathi, ukuhlolwa okungabhubhisi kufanele kwenziwe ngemuva kokuhlolwa okubonakalayo okudlulayo, i-radiography kanye nokuhlolwa kwe-ultrasonic kufanele kwenziwe ngemuva kokuhlolwa okungabhubhisi, ukuhlolwa kwe-weld seam kungase kuqhubeke ngemva kokuhlola ukufaneleka.