Wanpela 'seamless steel tube' oda i ken luk isi, tasol ol liklik samting i bikpela samting. Dispela 'seamless pipe file' i tok klia olsem ol i save yusim 'hot rolling' long wokim ol bikpela 'thick-wall pipe, na ol i save yusim 'cold rolling' na 'cold drawing' taim man i baim i nidim strongpela sais kontrol. Ol wankain toksave i givim 490 i go long 650 MPa olsem wanpela komon tensil strong refrens bilong presa-sevis.
Pastaim long ol i baim oda, ol baia i mas sekim ausait diamita, wol tiknes, longpela, 'steel grade' na kondisen bilong pes bilong en. Taim ol i raitim ol dispela poin klia, prodaksen na inspeksen i kamap isi long bihainim. Em i save daunim tu ol 'back-' na '-'forth' mesej taim yu wok long putim na sekim ol pepa. Long ol oda we ol i mekim gen, em i gutpela long holim rekot bilong 'tolerance' bilong bipo, moa yet taim ol i weldim 'tube' long ol samting we i stap pinis o bungim wantaim ol hap bilong masin. Wanpela klia lista bilong ol samting bilong putim long ol samting em i gutpela tu, long wanem, ol 'tube' we i gat wankain 'outside diameter' inap luk wankain long ples bilong wok.
