Paipu hao wiliʻoi aku ka maikaʻi ma mua o nā paipu hao hao maʻamau. ʻO ka graphite i ka hao hoʻolei maʻamau i loko o nā pepa a haʻahaʻa loa ka ikaika. No laila, ʻano haʻahaʻa ka ikaika o ka hao hao maʻamau, palupalu. ʻO ka graphite i loko o ka graphite cast iron he spherical, e like me ka nui o nā poʻe pōʻai i loko o ka hao. ʻOi aku ka liʻiliʻi o ka mana o ka spherical void i ka ikaika o ka hao hao ma mua o ka flake void, no laila ʻoi aku ka kiʻekiʻe o ka ikaika o ka paipu hao ductile ma mua o ka hao maʻamau.
Nā pōmaikaʻi o ka noi paipu hao ductile i ka pipeline wai:
1. No ka mea ductile hao paipu apono flexible hui, ke kūkulu 'ana i oi aku ka oluolu, hiki ke hoʻoikaika i ka hana pono hana, hoʻomaikaʻi i ke kūkulu 'ana i ke kumu kūʻai, a me ka hapa nui o ka mea hoʻopili i hoʻopaʻa lima apo pili, hana maʻalahi, hiki ke hoʻopōkole i ke kūkulu manawa, ho'ēmi i ke kumu kūʻai.
2. Me ka wai kiʻekiʻe, kū'ē i ka ukana o waho a hoʻololi i ka hoʻololi ʻana o nā kūlana geological, ua loaʻa i ka paipu nā mea maikaʻi o ka ikaika kiʻekiʻe, ka paʻakikī maikaʻi, ka pale ʻana i ka corrosion, ka maʻalahi o ka hoʻonohonoho pono ʻana, ke kūpaʻa seismic ikaika, ka haʻahaʻa haʻahaʻa haʻahaʻa, hiki ke hoʻopili ʻia i ka ʻāpana ʻilihune geological a ma ke alaloa, me ka ʻole o ka hana hou ʻana o ka paipu kila, i hui pū ʻia me ka ikaika corrosion kūʻē i ke kahakai. I kēia manawa, hoʻohana nui ʻia ia i ka ʻenehana pipeline underground. Hiki i nā papahana hoʻokomo pipeline nui ke hōʻike i kona mau pono o ka hoʻokomo kūpono a me ka ikaika haʻahaʻa o ka hana.
3. He maikaʻi ka hana hoʻopaʻa ʻana o ka paipu hao nodular a ʻaʻole maʻalahi ka leak, hiki ke hōʻemi i ka leakage o ka ʻoihana paipu a hoʻemi i ka uku mālama i kēlā me kēia lā o ka pūnaewele paipu.
ʻO ka graphite ma ka hao nodular ma ke ʻano pōʻai. ʻO ka nui o ka graphite he 6-7. Ma ke ʻano o ka maikaʻi, pono e hoʻomalu ʻia ka pae spheroidization o ka paipu hao nodular e like me ka 1~3 grade spheroidization rate >. =80%. No laila, ʻoi aku ka maikaʻi o nā waiwai mechanical. Manaʻo nā mea hana paipu hao ductile ma hope o ka hoʻopili ʻana i ka paipu hao ductile, he ferritic ke ʻano metala me ka liʻiliʻi o ke kukui kukui. ʻO nā waiwai mechanical maikaʻi.
Ka manawa hoʻouna: Mar-15-2023