What is Schedule 40 carbon steel pipe?

What is Schedule 40 carbon steel pipe?

Schedule 40 carbon steel pipe is a medium specification pipe, and Schedule (SCH) is a unit of measurement for the nominal wall thickness of the steel pipe. There are various grades of steel pipe, and reasonable classification according to specifications, each specification defines the thickness of the pipe, the larger the number indicates the thicker the pipe. The No. 40 carbon steel pipe is a medium pressure capacity pipe with a diameter of up to 24 inches and a wall thickness of up to 46 mm.

Specifications:

Schedule 40 steel pipes are standard steel pipes classified by nominal pipe size (NPS) and wall thickness. Their wall thickness is directly related to their nominal size (e.g. 1/4 inch to 20 inches). The thickness varies from 0.068 inches (1.73 mm) at the thinnest to 0.406 inches (10.31 mm) at the thickest. The standard thickness of pipe wall thickness makes Schedule 40 pipe suitable for a variety of applications, such as building construction, liquid transportation, and low pressure gas transportation. When manufactured, Schedule 40 steel pipes can be customized according to actual needs.

Schedule 40 Pipe size chart, dimensions, wall thickness and weight:

Nominal size [inches]	Outside diameter [inches]	Outside diameter [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
1/8 inches	0.405 inches	10.3 MM	0.068 inches	1.73 MM	0.24 lb/ft	0.37 kg/m
1/4 inches	0.540 inches	13.7 MM	0.088 inches	2.24 MM	0.42 lb/ft	0.84 kg/m
1/2 inches	0.840 inches	21.3 MM	0.109 inches	2.77 MM	0.85 lb/ft	1.27 kg/m
3/4 inches	1.050 inches	26.7 MM	0.113 inches	2.87 MM	1.13 lb/ft	1.69 kg/m
1 inches	1.315 inches	33.4 MM	0.133 inches	3.38 MM	1.68 lb/ft	2.50 kg/m
1 1/4 inches	1.660 inches	42.2 MM	0.140 inches	3.56 MM	2.27 lb/ft	3.39 kg/m
1 1/2 inches	1.900 inches	48.3 MM	0.145 inches	3.68 MM	2.72 lb/ft	4.05 kg/m
2 inches	2.375 inches	60.3 MM	0.154 inches	3.91 MM	3.65 lb/ft	5.44 kg/m
2 1/2 inches	2.875 inches	73.0 MM	0.203 inches	5.16 MM	5.79 lb/ft	8.63 kg/m
3 inches	3.500 inches	88.9 MM	0.216 inches	5.49 MM	7.58 lb/ft	11.29 kg/m
3 1/2 inches	4.000 inches	101.6 MM	0.226 inches	5.74 MM	9.11 lb/ft	13.57 kg/m
4 inches	4.500 inches	114.3 MM	0.237 inches	6.02 MM	10.79 lb/ft	16.07 kg/m
5 inches	5.563 inches	141.3 MM	0.258 inches	6.55 MM	14.62 lb/ft	21.77 kg/m
6 inches	6.625 inches	168.3 MM	0.280 inches	7.11 MM	18.97 lb/ft	28.26 kg/m
8 inches	8.625 inches	219.1 MM	0.322 inches	8.18 MM	28.55 lb/ft	42.55 kg/m
10 inches	10.750 inches	273.0 MM	0.365 inches	9.27 MM	40.48 lb/ft	60.31 kg/m
12 inches	12.750 inches	323.8 MM	0.406 inches	10.31 MM	53.52 lb/ft	79.73 kg/m
14 inches	14 inches	355.6 MM	0.375 inches	11.13 MM	54.57 lb/ft	94.55 kg/m
16 inches	16 inches	406.4 MM	0.500 inches	12.70 MM	82.77 lb/ft	123.30 kg/m
18 inches	18 inches	457.0 MM	0.562 inches	14.27 MM	104.67 lb/ft	155.80 kg/m
20 inches	20 inches	508.0 MM	0.594 inches	15.09 MM	123.11 lb/ft	183.42 kg/m
24 inches	24 inches	610.0 MM	0.688 inches	17.48 MM	171.29 lb/ft	255.41 kg/m
32 inches	32 inches	813.0 MM	0.688 inches	17.48 MM	230.08 lb/ft	342.91 kg/m

Mechanical strength:

Schedule 40 carbon steel pipe is available in a number of grades, each with its own unique properties and characteristics, the following are the two most common grades:

ASTM A53 Grade B
Yield Strength: 35000psi (min)
Tensile Strength: 60,00psi (min)
ASTM A106 Grade B
Yield Strength: 35000psi (min)
Tensile Strength: 60,00psi (min)


Chemical composition:
Schedule 40 carbon steel tubes are typically made of mild steel, such as ASTM A53 Grade B steel, which has good corrosion resistance and appropriate mechanical properties. The chemical composition usually includes the following:

Carbon: 0.25% (Max)
Manganese: 0.95% (Max)
Phosphorus: 0.05% (Max)
Sulfur: 0.045% (Max)
Copper: 0.4% (Max)
Nickel: 0.4% (Max)
Chromium: 0.4% (Max)
Molybdenum: 0.15% (Max)
Vanadium: 0.08% (Max)

Application scenario:
1. Due to its rugged properties, Schedule 40 steel pipes are widely used in many fields. Main applications include:
2. Water supply and gas distribution system: As a water supply and gas pipeline, Schedule 40 steel pipes ensure the safe delivery of fluids.
3. Hvac systems: heating, ventilation and air conditioning systems for residential, commercial and industrial buildings.
4. Oil and gas pipelines: widely used in the oil and gas industry to adapt to high temperature and high pressure environment.
5. Chemical processing: Pipelines used to transport acids, alkalis and other corrosive chemicals.
6. Power generation: pipes for conveying high-temperature and high-pressure steam and other fluids.
7. Building structure: Used for structural applications such as building support, scaffolding, fences, etc.
8. Agriculture and mining: transporting water in irrigation systems and mud and other materials in mining environments.