Holomua opaipu kila ERWua māhele ʻia i geometric seamless a me physical seamless.ʻO Geometric seamless o ka paipu kila ERW e wehe i nā burrs o loko a me waho.

Ma muli o ke ʻano o ka ʻōnaehana hoʻoneʻe burr i loko a me ka mea hana no ka hoʻomaikaʻi mau ʻana a me ka maikaʻi, ʻoi aku ka maikaʻi o ka paipu kila waena a me ka nui i loko o ka wehe ʻana i ka burr.I loko o ka burr hiki ke hoʻomalu 'ia ma -0.2mm ~ + O.5mm pela.E pili ana i ka microstructure weld kino kino i loko, aia kahi ʻokoʻa ma waena o ka waihona kumu a me ka weld wahi e hoʻemi ai i nā waiwai mechanical, pono e lawe i nā hana e hana i ka ʻenehana like ʻole.ERW kila paipu mea no ka kiʻekiʻe-frequency kuʻihao thermal kaʻina hana a me ka hopena i ka wela gradient, kahi kokoke i ka lihi o ka paipu a me ka hana ana i ka hehee ai wahi, ka semi-hooheehee wahi, overheating kiko, normalized wahi, wahi i ole loa normalizing, tempering āpana. o ka māhele hiʻona.ʻO ka ʻiʻo ʻāpana overheated ma muli o ke ana wela ma luna o 1000℃, 'o ka hua austenite i ulu nui i loko o nā kūlana ho'olu'u e hana i ka'āpana crystalline ko'iko'i pa'akiki, me ka hiki 'ana mai o ka gradient wela e ho'opuka i ke ko'iko'i ku'i.No laila, ʻo ke kūkulu ʻia ʻana o ka ʻāpana weld haʻahaʻa ma mua o nā waiwai metala kumu o ke kūlana ma o ke kaʻina hana hoʻōla wela weld seamless e hoʻohana ana i ka mea hoʻomehana induction maʻamau e weld wahi i hoʻomehana ʻia i AC3 (927).℃), a laila 60m ka lōʻihi, ka wikiwiki 20m / min i ka wā hoʻoluʻu o ka ea, hoʻoluʻu wai inā pono.Hoʻohana ʻia kēia ʻano hana e hoʻokō ai i ka hoʻopau ʻana i ke kaumaha, hoʻomaʻemaʻe a hoʻomaʻemaʻe i ka hui e hoʻomaikaʻi i nā kumu waiwai mechanical HAZ.I kēia manawa, ua hoʻohana nui ʻia ka ʻāpana ERW holomua o ka honua no ka hana ʻana i ka weld i loaʻa nā hopena maikaʻi.ʻAʻole hiki ke hoʻopaʻapaʻa ʻia ka maikaʻi ʻaʻole wale ʻo ERW pipe welds a weld coefficient o 1, ka hoʻokō ʻana o nā hui kūloko o ka weld a me ka metala kumu o ka pāʻani.