... A53 GR. B & C/, ASTM A333 GR. 3/6 & API-5L-GR. B/X42/X46/X52/X60/X65/X75 & ASTM A ... , boiler, power station, centrastation, shipping military, chemical industry, environment protection, traffic, food industry, medical equipment.9) Standard: Seamless – ASTM A106, API 5L, ... ASTM A179, , ASTM A53, ASTM A192, ASTM A333 Welded – API 5L, ASTM A53,ASTM A671/ A672. ...