ʻO nā uhi manhole ductile hao

ʻO nā uhi manhole ductile haoua hana nui ia me ka hao ductile.

ʻO ka uhi manhole ductile hao i kēia mau mea maikaʻi:

ma muli o ka ikaika kiʻekiʻe a me ka paʻakikī maikaʻi o ka ductile hao, ʻo ka uhi manhole ductile hao e pili ana30% māmāma mua o ka uhi manhole hao hina hina o ia ʻano like.

ʻO nā hiʻohiʻona o ka uhi manhole ductile hao:

① ʻOʻoleʻa maikaʻi. 

ʻOi aku ka waiwai o ka hopena ma mua o 10 mau manawa o ka mea hao hina.

②ʻO ka pale ʻana i ka corrosion ikaika.

ʻO ka hoʻāʻo ʻino ʻana i ka wai, 90 mau lā ʻo ka corrosion he 1/40 wale nō o ka paipu kila, ʻo ia ka 1/10 o ka paipu hao hina.ʻO ke ola lawelawe he 2 mau manawa ma mua o ka paipu hao hina a me 5 mau manawa ma mua o ka paipu kila maʻamau.

③ʻO ka plasticity maikaʻi.

longation ≥7%, e like me ke kila kalapona kiʻekiʻe.Akā ʻo ka elongation mea hao hina e pili ana i ka ʻole.

④Ka ikaika kiʻekiʻe.

ʻO ka ikaika tensile OB ≥420MPa, ka ikaika o ka OS ≥300MPa, ʻekolu manawa o ka mea hao hina.