ASTM D6823-08 美国材料与试验协会标准.pdf,Designation: D6823 − 08 (Reapproved 2013) Standard Specification for Commercial Boiler Fuels With Used Lubricating Oils1 This standard is issued under the fixed designation D6823; the number immediately fol
Surface Condition All tubes shall be free of excessive mill scale, suitable for inspection. A slight amount of oxidation will not be considered as scale. Any special finish requirements shall be subject to agreement between the manufacturer and the purchaser. ASTM A789 ASME SA 789 Seamless Tubes ...
The ASTM A178 Grade D steel shall be killed. ASTM A178 tubes shall be made by electric-resistance welding process. After welding, all tubes shall be heat treated at a temperature of 1650°F [900°C] or higher and followed by cooling in air or in the cooling chamber of a controlled-atmo...