ASTM A53 GRADE BB CARBON STEEL PIPE

ASTM A53 Grade B Carbon Steel Pipe is a commonly used specification for seamless and welded black and hot-dipped galvanized steel pipe. Here’s a detailed overview of its sizes and pressure ratings:

Sizes:

1. Nominal Pipe Size (NPS): Ranges typically from 1/8 inch (3.2 mm) to 26 inches (660 mm). For larger sizes, specifications might vary.
2. Diameter:
   • Outside Diameter (OD): Varies with the NPS. The OD is standardized based on ASME/ANSI B36.10M.
   • Inside Diameter (ID): Depends on the OD and the wall thickness of the pipe.
3. Wall Thickness:
   • Based on Schedule Number. Commonly used schedules for ASTM A53 Grade B are Schedule 40 and 80.
   • The wall thickness increases with the schedule number.
4. Lengths:
   • Standard lengths are 16, 22, or 24 feet, but custom lengths are available.

Pressure Ratings:

1. Dependent on Size and Schedule:
   • The pressure rating varies based on the size (NPS) and the schedule number. Generally, higher schedule numbers can handle higher pressures.
2. Working Pressure:
   • Calculated based on the formula contained in ASME B31.3.
   • For instance, a 1-inch NPS Schedule 40 pipe may have a pressure rating of about 1500 psi, whereas the same size in Schedule 80 might be rated at about 2500 psi.
3. Temperature Factor:
   • The pressure rating is also influenced by the operating temperature of the system.

Applications:

• ASTM A53 Grade B is suitable for welding, bending, and similar forming operations.
• Commonly used in steam, water, gas, and air lines.

Chemical composition for ASTM A53 Grade A and Grade B.