ʻO nā mea maʻamau i hoʻohana ʻia i hoʻohana ʻia: Q235A, Q235C, Q235B, 16Mn, 20 #, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17, 00Cr19Ni18, 1Cr17, 00Cr19Ni18 etc.
ʻO ka billet i hoʻohana ʻia no ka hoʻoheheʻe ʻana i ka paipu kila, ʻo ia ka pā kila a i ʻole ke kila kila, i hoʻokaʻawale ʻia i ka paipu welded umu, ka paipu wili uila (resistance welding) paipu a me ka paipu wili arc ma muli o kāna kaʻina hana kuʻi.Ma muli o kona mau ʻano kuʻi ʻokoʻa, ua māhele ʻia i loko o ka paipu wili wili pololei a me ka paipu wiliwili spiral ʻelua ʻano.Ma muli o ke ʻano o kona hopena, ua hoʻokaʻawale ʻia i nā paipu wili wili a me nā paipu welded kūikawā (square, flat, etc.).