Ingenamthungo:ukuhlatywa, ukuzotywa ngokutsha, i-annealed (inkqubo yokusasazwa kweepasi ezininzi).
Welded:i-welded longitudinally, i-redrawn, i-annealed (inkqubo yokusasazwa kweepasi ezininzi).
Ukupakisha:Ityhubhu linxeba elikwinqanaba elibhijelwe kwintsimbi / igubu leplanga okanye kwispools.
Onke amagubu okanye iispools zipakishwe kwiikreyiti zomthi ukuze zisebenze lula.