... Evaporators, Oil Refineries, Shipbuilding etc.3. Productions Standard Applied: ASTM B111 (ASTM B466, ASTM B359, ASTM 395), JIS H3300, BS 2871, BS EN 12451, EN ... 12449, GB/T8890 etc.4. Material Designation Applied: C71500, C70600, C71640, C68700 ... 's appointment.We can do better because we are professional. ASTM B111 C68700 Tube