API 5L umume nuduhake pipa line.
ASTM A 53 nyakup pipa baja sing mulus lan dilas kanthi kekandelan tembok nominal.
Pipa baja mulus karbon ASTM A106 GR.B minangka jinis pipa mulus karbon kanthi bagean berongga.
Pipa baja mulus digawe saka baja bunder kabeh perforated, lan pipa baja tanpa jahitan las ing permukaan kasebut diarani pipa baja mulus.