Umthengisi kunye nomthengisi we-ASTM A249 Tubing

I-ASTM A249 / A249M - 16a

Inombolo yokutyunjwa kwe-ASTM ichonga inguqulelo eyodwa yomgangatho we-ASTM.

A249 / A249M - 16a

A = iintsimbi ezinentsimbi;

249 = inani elabelwe elilandelelanayo

M = iiyunithi ze-SI

I-16 = unyaka wokwamkelwa kokuqala (okanye, kwimeko yohlaziyo, unyaka wohlaziyo lokugqibela)

a = ibonisa uhlaziyo olulandelayo kwangonyaka omnye