I-stockist kanye nomphakeli we-ASTM A249 Tubing

I-ASTM A249 / A249M – 16a

Inombolo yokuqokwa ye-ASTM ikhomba inguqulo ehlukile yezinga le-ASTM.

I-A249 / A249M – 16a

A = izinsimbi ezinensimbi;

249 = inombolo eyabelwe ngokulandelana

M = amayunithi e-SI

I-16 = unyaka wokutholwa kokuqala (noma, esimweni sokubuyekezwa, unyaka wokubuyekezwa kokugcina)

a = ikhombisa ukubuyekezwa okulandelayo ngonyaka ofanayo