Signa:
ASME SA106Maximum temperatus inconsutilis carbo ferro fistulam
ASME SA179-Seamless frigus instructa low carbonis chalybeis fistula et calor exchanger et condenser
ASME SA192-Seamless carbonis boiler fistulam in altum pressura
ASME SA210-Seamless Medium Carbon Steel Pipe ad Boilers et Superheaters
ASME SA213-Seamless ferritic et austenitic mixturae ferro tibiae boilers, superheaters et calor nummulariorum
ASME SA335-Seamless ferritic mixturae ferro exprimente fistulam pro caliditas
DIN17175- Seamless chalybe fistulae caloris repugnans chalybe
EN1021-2-Unalloyed ferro et mixturae ferro tibiae cum certa caliditas proprietatibus "
GB5310-Seamless ferro pipe in altum pressura boiler
GB3087-Seamless ferro pipe pro low et medium pressura boilers