Schedule 40 Galvanized Pipe

When it comes to durable and corrosion-resistant piping solutions, Schedule 40 galvanized pipe is a popular choice in various industries. This pipe, commonly used in plumbing, construction, and industrial applications, has proven its reliability due to its thickness, resistance to corrosion, and longevity. In this guide, we’ll cover important details about Schedule 40 galvanized pipe including its pressure ratings, dimensions, thickness, and more.

What is Schedule 40 Galvanized Pipe?

Galvanized steel pipe refers to a steel pipe coated with a layer of zinc on the surface of ordinary steel pipes. The zinc layer can form a protective film on the surface of the steel pipe, which can effectively extend the service life of the steel pipe and improve the corrosion resistance of the steel pipe.

Schedule 40 galvanized pipe refers to a type of steel pipe that has been coated with a layer of zinc to help protect it from corrosion. The "schedule 40" designation indicates the thickness of the pipe, with schedule 40 being a standard measurement for wall thickness . This type of pipe is commonly used in various applications, including water distribution, plumbing, and other industrial uses where corrosion resistance is important.

Schedule 40 Galvanized Pipe Dimensions and Thickness

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

Grades of Schedule 40 Steel Pipe

Schedule 40 steel pipe is available in a range of grades, each with its own unique properties and characteristics. The most common grades of Schedule 40 steel pipe are as follows:

ASTM A53 Grade B: This is the most commonly used grade of Schedule 40 steel pipe, and it is ideal for use in a variety of applications, including plumbing, construction, and industrial uses. It has a minimum yield strength of 35,000 psi and a minimum tensile strength of 60,000 psi.

ASTM A106 Grade B: This grade of Schedule 40 steel pipe is often used in high-temperature applications, such as steam and gas lines, as well as in refineries and plants. It has a minimum yield strength of 35,000 psi and a minimum tensile strength of 60,000 psi.

API 5L Grade B: This is another commonly used grade of Schedule 40 steel pipe, particularly in the oil and gas industry. It has a minimum yield strength of 35,000 psi and a minimum tensile strength of 60,000 psi.

ASTM A333 Grade 6: This grade of Schedule 40 steel pipe is designed for low-temperature service, and it is often used in cryogenic applications, such as liquefied natural gas (LNG) plants. It has a minimum yield strength of 35,000 psi and a minimum tensile strength of 60,000 psi.

Schedule 40 Galvanized Pipe Pressure Rating

One of the key factors in selecting Schedule 40 galvanized pipe is its pressure rating. The pressure rating indicates how much pressure the pipe can safely withstand without failure. For Schedule 40 galvanized pipe, the pressure rating varies based on the diameter of the pipe.

1 in (inch) = 25.4 mm
1 psi (lb/in2) = 6,894.8 Pa (N/m2) = 6.895x10-2 bar

Maximum Allowable Pressure (psi) (kPa)
NPS	Outside Diameter (OD)	Schedule
(in)	(in) (mm)	40
1/4	0.54 13.7	7985 55057
3/8	0.675 17.1	6606 45548
1/2	0.84 21.3	6358 43838
3/4	1.05 26.7	5273 36357
1	1.315 33.4	4956 34172
1 1/4	1.66 42.2	4133 28497
1 1/2	1.9 48.3	3739 25780
2	2.375 60.3	3177 21905
2 1/2	2.875 73	3460 23857
3	3.5 88.9	3024 20850
3 1/2	4 102	2769 19092
4	4.5 114	2581 17796
5	5.563 141	2273 15672
6	6.625 168	2071 14280
8	8.625 219	1829 12611
10	10.75 273	1664 11473
12	12.75 324	1560 10756
14	14 356	1533 10570
16	16 406	1531 10556
18	18 457	1530 10549
20	20 508	1455 10032
22	22 559
24	24 610	1405 9687
30	30 762
32	32 813	1054 7267
34	34 864	992 6840
36	36 914	1021 7040
42	42 1067	875 6033

Schedule 40 Galvanized Pipe Fittings

To complete a piping system, you may also need Schedule 40 galvanized pipe fittings such as elbows, tees, and couplings. These fittings are designed to connect Schedule 40 galvanized pipes together and are made from galvanized steel to ensure compatibility with the pipe’s protective coating. These fittings are available in standard pipe sizes and can handle similar pressure ratings as the pipes themselves.

Where to Buy Schedule 40 Galvanized Pipe

For anyone looking to purchase Schedule 40 galvanized pipe, options are widely available both online and at local suppliers. Hardware stores such as Home Depot and plumbing supply outlets are great places to find Schedule 40 galvanized pipe in various sizes. Additionally, local suppliers often stock Schedule 40 galvanized steel pipe dimensions and can offer custom cutting to fit specific needs.

Applications of Sch 40 Galvanized Pipe

Schedule 40 steel pipe is commonly used in a wide range of applications across various industries. Some of the most common applications of Schedule 40 steel pipe include:
Plumbing and HVAC: Schedule 40 steel pipe is widely used for plumbing and heating, ventilation, and air conditioning (HVAC) systems in residential, commercial, and industrial buildings.
Water treatment: Schedule 40 steel pipe is used in water treatment plants and distribution systems for conveying clean water and wastewater.
Oil and gas: Schedule 40 steel pipe is commonly used in the oil and gas industry for transporting crude oil, natural gas, and other petroleum products.
Chemical processing: Schedule 40 steel pipe is used in chemical processing plants for conveying acids, alkalis, and other corrosive chemicals.
Power generation: Schedule 40 steel pipe is used in power plants for conveying steam and other fluids in high-temperature and high-pressure applications.
Construction: Schedule 40 steel pipe is commonly used in construction for structural applications, such as building supports, scaffolding, and fences.
Agriculture: Schedule 40 steel pipe is used in irrigation systems for conveying water to crops and for supporting agricultural structures such as greenhouses.
Mining: Schedule 40 steel pipe is used in mining operations for conveying slurries and other materials in corrosive environments.

Installation precautions of schedule 40 galvanized pipe

(1) Before proper installation, the galvanized layer of the pipe needs to be protected. Sharp objects cannot be used to directly touch the galvanized pipe to prevent it from affecting its later use, and it is also necessary to ensure that the galvanized pipe It should be straight and cannot be bent. Especially for some pipes, too much dirt should not be left to prevent some pipes from being blocked.

(2) When installing galvanized pipes, you should also check whether the pipe fittings are complete. If there is any damage, replace it in time. It can no longer be used. Otherwise, some problems will not easily occur. This is also easy. In order to shorten the use time, when cutting the pipe, it is necessary to ensure that the cut is smooth, and at the same time, the inner diameter of the pipe cannot be reduced.

(3) After the galvanized pipe is installed, it must be inspected to see if there are any broken wires to facilitate later maintenance. At the same time, the galvanized pipe must be oiled and wiped clean. Yes, the most important thing is to fasten it by yourself, so as to ensure that the force is even and prevent unnecessary trouble.