Signa:
ASTM A106-Seamless carbonis fistulae ad caliditas
ASTM A213-Seamless ferritic et austenitic mixturae ferro fistulae ad boilers, superheaters et calor nummulariorum
ASTM A333-Seamless et iuncta nominis ferro pipe pro low temperatus
ASTM A335-Seamless ferritic mixturae ferro exprimente fistulam pro caliditas
EN1021-2-Unalloyed ferro et mixturae ferro tibiae cum certa caliditas proprietatibus "
GB9948-Seamless ferro tibia ad PETROLEUM crepuit
GB6479-Seamless ferro pipe pro summus pressura stercorat armorum