DHDZ ke tekanyetso ea naha e nang le baetsi ba li-flange tsa molala. Khamphani e na le matla a matla a botekgeniki, e ka rala le ho etsa litlhaloso tse fapaneng tse khethehileng tsa lihlahisoa tse kenyang liphaephe ho latela litlhoko tsa mosebelisi. Ka tlhahlobo ea metallographic, liteko tsa 'mele, tlhahlobo ea lik'hemik'hale, tlhahlobo e sa senyeheng le lisebelisoa tse ling tse tsoetseng pele tsa tlhahlobo le mekhoa.
Baetsi ba li-flange ba ameha haholo ho: gb neck flange, neck flat welding flange, neck butt welding flange, neck non-standard flange le mefuta e meng ea melala ea molala. Setsi sa Iplant se na le palo e kholo ea basebetsi ba mochini oa liphaephe, lisebelisoa tse tsoetseng pele tsa forging le spectral metallography, ho lemoha liphoso, tlhahlobo ea 'mele le ea lik'hemik'hale le lisebelisoa tse ling tse felletseng tsa tlhahlobo, k'hamphani e kenya tšebetsong sistimi ea taolo e tloaelehileng ea boleng. E thehile tsamaiso ea netefatso ea boleng ba saense, mokhoa o phethahetseng oa netefatso ea boleng le theknoloji ea tlhahiso ea mahlale e netefatsa boleng ba sehlahisoa ka nepo.

Baetsi ba DHDZ Flange ba thehile lefapha la taolo ea boleng le setsi sa tlhahlobo, se nang le lisebelisoa tse phahameng tsa khatello ea liphaephe le lisebelisoa tse bohareng le tse tlase tsa khatello ea liphaephe tse peli tsa liteko, mesebetsi ea ho hlahloba e phethiloe, lisebelisoa tsa ho hlahloba le lisebelisoa li boemong bo tsoetseng pele ba machaba le ba malapeng, Ho na le X- Ho lemoha mefokolo ea mahlaseli a mahlaseli a kotsi, ho lemoha mefokolo ea matla a khoheli, ho lemoha bofokoli ba ultrasonic, tlhahlobo ea metallographic, tlhahlobo ea lik'hemik'hale, tlhahlobo ea thepa ea mochine, tlhahlobo ea phello, tlhahlobo ea khatello ea metsi, tlhahlobo ea spectral, tlhahlobo ea infrared le lintho tse ling tsa tlhahlobo.
China gb neck flange bahlahisi - ba hapa ka boleng, phaello e nyane empa molao-motheo oa thekiso o potlakileng, o lula o hatela pele, tlholisanong e matla ea 'maraka, ka tšebelisano-'moho e ntle le moea oa ts'ebeletso e tšepahalang ho hapa boholo ba bareki ba tšepa le nts'etsopele e potlakileng. Ho hatela pele, ho lelekisa bokhabane, ho tsoela pele ho ithuta, ho sa khotsofatsoe ke tumelo ea bareki ba rona ea ho theha maemo a win habeli, ho theha bokamoso bo betere.