Ngwaahịa
-
ASTM A106 GR.B nke enweghị isi na-enweghị mmiri maka mmiri
-
API 5l enweghị igwe na-enweghị eriri maka gas mmanụ
-
API 5L ASTM A106 A333 ma ọ bụ A335 ígwè carbon carbon
-
API 5CT, J55, K55, L80, N80 Steel Calen & Tung
-
API 5Cct carbon steel pịmịrị
-
ASTM A333, ASTM A335, ASTM A387, ASTM A213 / 213m Ígwè alloy
-
ASTM A192, ASTM A179, ASTM A209, ASTM A210 Ál
-
Igwe eletriki eletrik erded erw steel pịlịcha eriri eriri
-
SANS 657-3, en 10305, Dan 2391 dị elu ígwè / tubes dị elu