ASTM A691 Electric Fusion Welded Alloy Steel Pipe For High-Pressure Service ASTM A691 electric fusion welded alloy steel pipe is manufactured from pressure-vessel-quality alloy steel plate with filler metal added during welding. It is designed primarily for high-pressure piping systems operating at elevated temperatures where large diameter, controlled Cr-Mo chemistry, weld integrity, and specified post-weld heat treatment are required. ASTM A691/A691M nominally covers pipe
ASTM A691 Electric Fusion Welded Alloy Steel Pipe For High-Pressure Service ASTM A691 electric fusion welded alloy steel pipe is manufactured from pressure-vessel-quality alloy steel plate with filler metal added during welding. It is designed primarily for high-pressure piping systems operating at elevated temperatures where large diameter, controlled Cr-Mo chemistry, weld integrity, and specified post-weld heat treatment are required. ASTM A691/A691M nominally covers pipe