Umucuruzi akaba n'umucuruzi wa ASTM A249 Tubing

ASTM A249 / A249M – 16a

Inomero y'icyitegererezo cya ASTM igaragaza verisiyo yihariye y'igipimo cya ASTM.

A249 / A249M – 16a

A = ibyuma bya fer;

249 = umubare watanzwe ukurikirana

M = ibice bya SI

16 = umwaka wo kwemererwa bwa mbere (cyangwa, mu gihe cyo kuvugurura, umwaka wo kuvugurura bwa nyuma)

a = igaragaza ivugurura ryakurikiyeho muri uwo mwaka