STANDARD DIMENSIONS FOR WELDED OR SEAMLESS STEEL PIPE

The standard dimensions for welded or seamless steel pipes vary depending on the specific standard used. Here are the dimensions for some of the commonly used standards:

1. ANSI/ASME B36.10M: This standard covers the standardization of dimensions of welded and seamless wrought steel pipe for high or low temperatures and pressures. It covers pipes with nominal pipe sizes (NPS) from 1/8 inch (10.3 mm) to 80 inches (2032 mm) and thicknesses from SCH 10 to SCH 160.

2. ANSI/ASME B36.19M: This standard covers the standardization of dimensions of stainless steel pipes for high or low temperatures and pressures. It covers pipes with NPS from 1/8 inch (10.3 mm) to 12 inches (304.8 mm) and thicknesses from SCH 5S to SCH XXS.

3. API 5L: This standard covers the specification for seamless and welded steel line pipe. It covers pipes with NPS from 1/8 inch (10.3 mm) to 48 inches (1219 mm) and thicknesses from SCH 10 to SCH 160.

4. ASTM A106: This standard covers the specification for seamless carbon steel pipe for high-temperature service. It covers pipes with NPS from 1/8 inch (10.3 mm) to 48 inches (1219 mm) and thicknesses from SCH 10 to SCH 160.

5. ASTM A53: This standard covers the specification for seamless and welded black and hot-dipped galvanized steel pipe. It covers pipes with NPS from 1/8 inch (10.3 mm) to 26 inches (660 mm) and thicknesses from SCH 10 to SCH 160.

These are just a few of the many standards that exist for steel pipe dimensions. The specific dimensions required for a given application will depend on the intended use of the pipe, as well as the applicable codes and regulations.

Diameter decimal equivalents for pipe sizes .

Here are the diameter decimal equivalents for common pipe sizes in inches:

• 1/8 inch pipe = 0.405 inch (10.29 mm)
• 1/4 inch pipe = 0.540 inch (13.72 mm)
• 3/8 inch pipe = 0.675 inch (17.15 mm)
• 1/2 inch pipe = 0.840 inch (21.34 mm)
• 3/4 inch pipe = 1.050 inches (26.67 mm)
• 1 inch pipe = 1.315 inches (33.40 mm)
• 1 1/4 inch pipe = 1.660 inches (42.16 mm)
• 1 1/2 inch pipe = 1.900 inches (48.26 mm)
• 2 inch pipe = 2.375 inches (60.33 mm)
• 2 1/2 inch pipe = 2.875 inches (73.03 mm)
• 3 inch pipe = 3.500 inches (88.90 mm)
• 3 1/2 inch pipe = 4.000 inches (101.60 mm)
• 4 inch pipe = 4.500 inches (114.30 mm)

These diameter decimal equivalents are based on standard pipe sizes and are commonly used in the industry for pipe dimensions and specifications.