Hoʻohana nui ʻia ʻo Api5ct oil casing no ka lawe ʻana i ka aila, ke kinoea maoli, ke kinoea, ka wai a me nā wai ʻē aʻe a me nā kinoea, hiki ke hoʻokaʻawale ʻia i loko o ka paipu kila seamless a me ka paipu kila welded. Welded kila paipu nui pili i longitudinal welded kila paipu