ST12 o le mea moni e masani ona taai uamea malulu, ST12 o le tulaga Siamani (DIN1623), e tutusa ma EN10130 DC01, JS SPCC, le tulaga Amerika ASTM A1008 CS.ST12 o le uamea taai malulu masani, ST13 faailoga tusi uamea malulu, ST14 loloto. tusi vasega malulu taai uamea, ST12 ua faaalia o se numera uamea masani, ma q195, spcc, DC01 vasega mea e faavae tutusa.