ASTM A671 Electric Fusion Welded Steel Pipe for Lower Temperatures ASTM A671 electric-fusion-welded steel pipe is manufactured from pressure-vessel-quality carbon or alloy steel plate with filler metal added during welding. It is designed primarily for high-pressure piping systems operating at atmospheric and lower temperatures. The ASTM A671 grade identifies the pressure vessel plate used for pipe manufacture, while the class number defines the required pipe heat treatment,
ASTM A671 Electric Fusion Welded Steel Pipe for Lower Temperatures ASTM A671 electric-fusion-welded steel pipe is manufactured from pressure-vessel-quality carbon or alloy steel plate with filler metal added during welding. It is designed primarily for high-pressure piping systems operating at atmospheric and lower temperatures. The ASTM A671 grade identifies the pressure vessel plate used for pipe manufacture, while the class number defines the required pipe heat treatment,