1.Izidingo eziyisisekelo zokuvela kwamashisela e-LSAW

Ngaphambi kokuhlolwa okungabhubhisi kweAmapayipi ensimbi e-LSAW, ukuhlolwa kokubukeka kwe-weld kuzohlangabezana nezidingo. Izidingo ezijwayelekile zokubukeka kwama-welds we-LSAW kanye nekhwalithi yobuso bamalunga ahlanganisiwe yilezi ezilandelayo: ukubukeka kwe-weld kufanele kwakhiwe kahle, futhi ububanzi kufanele bube ngu-2 mm ohlangothini ngalunye ngaphezu komkhawulo we-groove. Ukuphakama kwe-fillet ye-fillet weld kuzohambisana nemithethonqubo yokuklama futhi ukuma kuzoba ukuguquguquka okubushelelezi. Ingaphezulu lejoyinti elishiselwe kufanele libe:

(1) Imifantu, engaxutshiwe, ama-pores, i-slag inclusions, nama-splashes akuvunyelwe.

(2) Amapayipi, izinsimbi ezingagqwali kanye nendawo yokushisela yensimbi enengxubevange enezinga lokushisa lomklamo elingaphansi kuka -29 degrees akufanele libe nama-undercuts. Okunye okubalulekile kwepayipi lokushisela umthungo ongaphansi ukujula kufanele kube kukhulu kuno-0.5mm, ubude be-undercut obuqhubekayo akufanele bube ngaphezu kuka-100mm, futhi ubude obuphelele be-undercut ezinhlangothini zombili ze-weld abudluli ku-10% wobude obuphelele be-weld. .

(3) Ubuso be-weld akufanele bube ngaphansi kunobuso bepayipi. Ubude be-weld bead abukho ngaphezu kuka-3mm (ububanzi obukhulu beqembu elihlangene elishiselwe ukuya kwi-bevel engemuva).

(4) Uhlangothi olungalungile lwejoyinti elishiselwe akumele ludlule u-10% wokuqina kodonga futhi akumele ludlule ku-2 mm.

2.Ukuhlola okungaphezulu kokungonakali

Umgomo wendlela yokuhlola engonakalisi ebusweni bepayipi lensimbi ye-LSAW: ukuhlolwa kwempuphu kazibuthe kufanele kusetshenziselwe ipayipi lensimbi ye-ferromagnetic; ukuhlolwa kokungena kufanele kusetshenziselwe ipayipi lensimbi elingeyona i-ferromagnetic. Emajoyini ahlanganisiwe anomkhuba wokulibazisa ukuqhekeka, ukuhlolwa okungaphezulu okungabhubhisi kuzokwenziwa ngemuva kokuba i-welding ipholile isikhathi esithile; kumajoyinti ahlanganisiwe anomkhuba wokushisa kabusha ukuqhekeka, ukuhlolwa okungaphezulu okungabhubhisi kuzokwenziwa kanye ngemva kokushisela nangemva kokwelashwa kokushisa. Ukusetshenziswa kokuhlolwa okungonakalisi kwendawo kwenziwa ngokwezidingo ezijwayelekile. Izinto ezitholwayo kanye nezicelo ngokuvamile zimi kanje:

(1) Ukuhlolwa kwekhwalithi yendawo yangaphandle yezinto zamapayipi.

(2) Ukutholwa kokukhubazeka okungaphezulu kokushisela okubalulekile kwezinqe.

(3) Ukuhlolwa kokukhubazeka okungaphezulu kwama-welds abalulekile we-fillet.

(4) Ukutholwa kokukhubazeka okungaphezulu kwamajoyinti ashiselwe okushisela okubalulekile kwesokhethi namapayipi egatsha e-jumper tee.

(5) Ukutholwa kokonakala kwendawo ngemva kokugotshwa kwepayipi.

(6) Impahla iyacinywa futhi i-groove itholwa ngokuhlanganyela okushiselwe.

(7) Ukutholwa kwamapayipi ensimbi engagqwali angewona ama-austenitic izinga lokushisa lawo elingaphansi noma elilingana no-29 degrees Celsius.

(8) Ukushisela okunezinhlangothi ezimbili kuchaza ukuhlolwa kwezimpande ngemva kokuhlanzwa kwezimpande.

(9) Lapho into yokushisela epayipini lengxubevange enomkhuba wokuqina isikwa ilangabi le-oxyacetylene, kutholwa iphutha lengxenye yokugaya.

3.Ukutholwa kwemisebe kanye nokuhlolwa kwe-ultrasonic

Izinto eziyinhloko zokutholwa kwemisebe kanye nokuhlolwa kwe-ultrasonic amajoyinti ezinqe zamapayipi ensimbi enomthungo oqondile kanye namajoyinti ezinqe zokufakwa kwamapayipi ashiselwe ngezinqe. Izindlela zokuhlola ezingezona ezonakalisayo zikhethwa ngokuvumelana nemibhalo yokuklama. Ukuze kutholwe amalunga ashiselwe e-titanium, i-aluminium ne-aluminium alloys, ama-alloys ethusi nawethusi, ama-nickel nama-nickel alloys, kufanele kusetshenziswe indlela yokuthola imisebe. Kumashisela anomkhuba wokulibaziseka ukuqhekeka, ukuhlolwa kwe-ray kanye nokuhlolwa kwe-ultrasonic kuzokwenziwa ngemuva kokuba i-welding ipholile isikhathi esithile. Lapho ipayipi eyinhloko ku-casing ine-weld ye-girth, i-weld izoqhutshwa ngokuhlolwa kwe-ray 100%, futhi ukusebenza okufihliwe kungenziwa ngemuva kokudlula ukucindezela kokuhlolwa. Amajoyinti ashiselwe epayipini elimbozwe yiringi yokuqinisa noma iphedi yokusekela kufanele ahlolwe ama-ray angu-100% futhi azombozwa ngemva kokuphumelela ukuhlolwa. Kuma-welds ashiwo ukuze kuhlolwe okuphakathi kokushisela, ukuhlolwa okungabhubhisi kuzokwenziwa ngemuva kokuhlolwa okubonakalayo. Ukuhlolwa kwe-radiographic kanye ne-ultrasonic kuzokwenziwa ngemuva kokuhlolwa okungonakalisi kwendawo.

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