Laba graves oo aad u muhiim ah, sida badhanka dhulalka iyo boobyada indha la ', ayaa badanaa loo isticmaalaa nidaamyada tuubbooyinka. Shuruudaha "B16.5" ama "B16 5" waxaa loo istcimaalaa si iscraad ah oo tixraac isla heerkaas. Si kastaba ha noqotee, heerka caadiga ah ee Asme B16 5 (Ansi B16 5) kaliya wuxuu daboolayaa cabir ilaa 24 inji. Cabbirrada waaweyn, AsmeE B16.47 Caadi ahaan wuxuu daboolayaa qiimeynta heerkulka cadaadiska, qalabka, cabirrada, calaamadaha NPS 60, 300, 300, 400, 600, 600, 600 iyo 900,