Q345 seamless paipa o lo'o i lalo fa'asologa u'amea - maualalo u'amea maualuga malosi fausaga uamea (GB / t1591-1994).Q345A, B, C, D ma E o togi sui o lenei ituaiga uamea.Pe a faʻatusatusa i le carbon structural steel, Q345A o loʻo i ai le lelei o le malosi maualuga, lelei le faʻatinoina o galuega, umi o le auaunaga, lautele faʻaoga faʻaoga ma le tamaoaiga.E faʻaaogaina lautele i alalaupapa, vaʻa, pusa, taʻavale ma fausaga taua o fale.