What is ASME B36.10 Schedule 80 Carbon Steel Pipe?

What Is ASME B36.10?

American Society of Mechanical Engineers developed the ASME B36.10 standard to define the dimensions of welded and seamless wrought steel pipes used in pressure and industrial piping systems. The standard specifies nominal pipe size (NPS), outside diameter (OD), wall thickness, and pipe schedule for carbon steel and alloy steel pipes.

ASME B36.10 is widely used in industries such as oil and gas, petrochemical processing, power generation, water transmission, and industrial manufacturing because it ensures dimensional consistency between pipes produced by different manufacturers.
The standard mainly applies to:
Carbon steel pipe
Alloy steel pipe
Seamless steel pipe
ERW steel pipe
Welded steel pipe
For stainless steel pipes, ASME B36.19 is commonly used instead.

What Does Schedule 80 Mean?

Schedule 80, often written as SCH 80, refers to the wall thickness of a steel pipe. Compared with lower schedules such as Schedule 40, SCH 80 pipes have thicker walls and higher pressure resistance. For example, an 8-inch Schedule 80 pipe has a much thicker wall than an 8-inch Schedule 40 pipe, making it suitable for high-pressure fluid and gas transportation systems.

ASME B36.10 Schedule 80 Carbon Steel Pipe Dimensions

Nominal size [inches]	Outside diameter [inches]	Outside diameter [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
8 inches	8.625 inches	219.1 mm	0.250 inches	6.35 mm	22.36 lb/ft	33.31 kg/m
10 inches	10.750 inches	273.0 mm	0.250 inches	6.35 mm	28.04 lb/ft	41.77 kg/m
12 inches	12.750 inches	323.8 mm	0.250 inches	6.35 mm	33.38 lb/ft	49.73 kg/m
14 inches	14.000 inches	355.6 mm	0.312 inches	7.92 mm	45.61 lb/ft	67.90 kg/m
16 inches	16.000 inches	406.4 mm	0.312 inches	7.92 mm	52.27 lb/ft	77.83 kg/m
18 inches	18.000 inches	457.0 mm	0.312 inches	7.92 mm	58.94 lb/ft	87.71 kg/m
20 inches	20.000 inches	508.0 mm	0.375 inches	9.53 mm	78.60 lb/ft	117.15 kg/m
22 inches	22.000 inches	559.0 mm	0.375 inches	9.53 mm	86.61 lb/ft	129.13 kg/m
24 inches	24.000 inches	610.0 mm	0.375 inches	9.53 mm	94.62 lb/ft	141.12 kg/m
26 inches	26.000 inches	660.0 mm	0.500 inches	12.70 mm	136.17 lb/ft	202.72 kg/m
28 inches	28.000 inches	711.0 mm	0.500 inches	12.70 mm	146.85 lb/ft	218.69 kg/m
30 inches	30.000 inches	762.0 mm	0.500 inches	12.70 mm	157.53 lb/ft	234.67 kg/m
32 inches	32.000 inches	813.0 mm	0.500 inches	12.70 mm	168.21 lb/ft	250.64 kg/m
34 inches	34.000 inches	864.0 mm	0.500 inches	12.70 mm	178.89 lb/ft	266.61 kg/m
36 inches	36.000 inches	914.0 mm	0.500 inches	12.70 mm	189.57 lb/ft	282.27 kg/m

How Does ASME B36.10 Schedule 80 Differ from Other Carbon Steel Pipe Schedules?

Additionally, the robust wall thickness enhances the pipe’s overall durability and resistance to external stresses, improving its performance and longevity in challenging environments.

Pressure Rating of SCH 80 Carbon Steel Pipe

The pressure capacity of Schedule 80 pipe depends on several factors, including:
Pipe size
Material grade
Operating temperature
Manufacturing process
Corrosion allowance

Common materials used for SCH 80 pipe include:
ASTM A106 Grade B
ASTM A53 Grade B
API 5L Grade B
At normal ambient temperature, Schedule 80 pipes can withstand significantly higher pressures than Schedule 40 pipes because of their increased wall thickness.
For critical industrial systems, engineers usually calculate allowable pressure according to ASME B31.3 or related piping design codes.

Features of ASME B36.10 Schedule 80 Carbon Steel Pipe

1.Material Composition

2.Wall Thickness and Pressure Rating

3.Dimensional Accuracy

4.Seamless and Welded Options

5.Wide Applications