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PIPE vs TUBE	STEEL PIPE
Key Dimensions (Pipe and Tube Size Chart)	The most important dimensions for a pipe is the outer diameter (OD) together with the wall thickness (WT). OD minus 2 times WT (SCHEDULE) determine the inside diameter (ID) of a pipe, which determines the liquid capacity of the pipe. The NPS does not match the true diameter, it is a rough indication
Wall Thickness	The thickness of a steel pipe is designated with a "Schedule" value (the most common are Sch. 40, Sch. STD., Sch. XS, Sch. XXS). Two pipes of different NPS and same schedule have different wall thicknesses in inches or millimeters.
Types of Pipes and Tubes (Shapes)	Round only
Production range	Extensive (up to 80 inches and above)
Tolerances (straightness, dimensions, roundness, etc) and Pipe vs. Tube strength	Pipes are generally made to stock with highly automated and efficient processes, i.e. pipe mills produce on a continuous basis and feed distributors stock around the world.
Production Process	Pipes are generally made to stock with highly automated and efficient processes, i.e. pipe mills produce on a continuous basis and feed distributors stock around the world.
Delivery time	Can be short
Market price	Relatively lower price per ton than steel tubes
Materials	A wide range of materials is available
End Connections	The most common are beveled, plain and screwed ends

PIPE vs TUBE	STEEL TUBE
Key Dimensions (Pipe and Tube Size Chart)	The most important dimensions for a steel tube are the outside diameter (OD) and the wall thickness (WT). These parameters are expressed in inches or millimeters and express the true dimensional value of the hollow section.
Wall Thickness	The wall thickness of a steel tube is expressed in inches or millimeters. For tubing, the wall thickness is measured also with a gage nomenclature.
Types of Pipes and Tubes (Shapes)	Round, rectangular, square, oval
Production range	A narrower range for tubing (up to 5 inches), larger for steel tubes for mechanical applications
Tolerances (straightness, dimensions, roundness, etc) and Pipe vs. Tube strength	Steel tubes are produced to very strict tolerances. Tubulars undergo several dimensional quality checks, such as straightness, roundness, wall thickness, surface, during the manufacturing process. Mechanical strength is a major concern for tubes.
Production Process	Tubes manufacturing is more lengthy and laborious
Delivery time	Generally longer
Market price	Higher due to lower mills productivity per hour, and due to the stricter requirements in terms of tolerances and inspections
Materials	Tubing is available in carbon steel, low alloy, stainless steel, and nickel-alloys; steel tubes for mechanical applications are mostly of carbon steel
End Connections	Threaded and grooved ends are available for quicker connections on site

PIPE vs TUBE	STEEL PIPE	STEEL TUBE
Key Dimensions (Pipe and Tube Size Chart)	The most important dimensions for a pipe is the outer diameter (OD) together with the wall thickness (WT). OD minus 2 times WT (SCHEDULE) determine the inside diameter (ID) of a pipe, which determines the liquid capacity of the pipe. The NPS does not match the true diameter, it is a rough indication	The most important dimensions for a steel tube are the outside diameter (OD) and the wall thickness (WT). These parameters are expressed in inches or millimeters and express the true dimensional value of the hollow section.
Wall Thickness	The thickness of a steel pipe is designated with a "Schedule" value (the most common are Sch. 40, Sch. STD., Sch. XS, Sch. XXS). Two pipes of different NPS and same schedule have different wall thicknesses in inches or millimeters.	The wall thickness of a steel tube is expressed in inches or millimeters. For tubing, the wall thickness is measured also with a gage nomenclature.
Types of Pipes and Tubes (Shapes)	Round only	Round, rectangular, square, oval
Production range	Extensive (up to 80 inches and above)	A narrower range for tubing (up to 5 inches), larger for steel tubes for mechanical applications
Tolerances (straightness, dimensions, roundness, etc) and Pipe vs. Tube strength	Pipes are generally made to stock with highly automated and efficient processes, i.e. pipe mills produce on a continuous basis and feed distributors stock around the world.	Steel tubes are produced to very strict tolerances. Tubulars undergo several dimensional quality checks, such as straightness, roundness, wall thickness, surface, during the manufacturing process. Mechanical strength is a major concern for tubes.
Production Process	Pipes are generally made to stock with highly automated and efficient processes, i.e. pipe mills produce on a continuous basis and feed distributors stock around the world.	Tubes manufacturing is more lengthy and laborious
Delivery time	Can be short	Generally longer
Market price	Relatively lower price per ton than steel tubes	Higher due to lower mills productivity per hour, and due to the stricter requirements in terms of tolerances and inspections
Materials	A wide range of materials is available	Tubing is available in carbon steel, low alloy, stainless steel, and nickel-alloys; steel tubes for mechanical applications are mostly of carbon steel
End Connections	The most common are beveled, plain and screwed ends	Threaded and grooved ends are available for quicker connections on site