F1083 schedule 40 pipe is available in two grades; ASTM F1083 Regular Grade has a standard yield strength of 30,000 psi and a tensile strength of 48,000 psi. ASTM F1083 High-Yield Strength (HYS) has a standard yield strength of 42,000 psi and a tensile strength of 60,000 psi. Both grades are black in color.
Schedule 40 pipe is used in high-pressure applications where it is essential that the pipe be corrosion resistant. It is also used for piping that will not be subject to chemical attack or high temperatures.
Schedule 40 pipe is manufactured from hot-rolled steel sheets that are welded together to form a hollow cylinder. The thickness of the wall varies from 0.5 inches to 1.25 inches. Pipe of other sizes and diameters can be obtained by rolling and welding multiple pieces of sheet metal together.
The term "schedule" refers to the severity of the material's resistance to corrosion. Schedule 10 means that the material will not corrode under normal conditions. Schedule 40 means that the material will withstand a corrosive environment for 40 years without repair. Most industrial piping is scheduled at least 40. Some heating systems and water lines are scheduled 80 or 100.
Standard seamless pipe diameters are rated at temperatures ranging from 100°F to 750°F. All pressure values are in psig and are based on ANSI/ASME B 3. We hope we were able to assist you in locating your pressure rating data.
Class 150 Black Malleable Iron and Galvanized Pipe Fittings are pressure class rated. Class 150 has a saturated steam pressure rating of 150 psi and a maximum WOG (Water Oil Gas) pressure rating of 300 psi At 150 oF. The metal in this type of pipe is black malleable iron.
Class 200 White Metal Steel and Aluminum Pipe Fittings are pressure class rated. Class 200 has a saturated steam pressure rating of 200 psi and a maximum WOG (Water Oil Gas) pressure rating of 500 psi At 150 oF. The metal in this type of pipe is white metal steel.
Class 250 Carbon Steel Pipe Fittings are pressure class rated. Class 250 has a saturated steam pressure rating of 250 psi and a maximum WOG (Water Oil Gas) pressure rating of 600 psi At 150 oF. The metal in this type of pipe is carbon steel.
Class 300 Copper Tube and Rod Fittings are pressure class rated. Class 300 has a saturated steam pressure rating of 300 psi and a maximum WOG (Water Oil Gas) pressure rating of 750 psi At 150 oF. The metal in this type of pipe is copper.
Class 350 Brass Tube and Rod Fittings are pressure class rated.
Schedule 40 Steel Pipe Wall ThicknessSchedule 40 Steel Pipe Pressure Rating NPS is an abbreviation for Nominal Pipe Size. Pressure Rating for Schedule 40 Steel Pipe
| Maximum Allowable Pressure (psi) (kPa) | ||
|---|---|---|
| NPS | Outside Diameter | Schedule |
| 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 |
STD-Schedule 40 Standard Wrought Steel Pipes
| Pipe Dimension (inches) | Standard – STD – Sch. 40 | |
|---|---|---|
| Bursting Pressure (psi) | Working Pressure (psi) | |
| 1 1/4 | 6745 | 840 |
| 1 1/2 | 6100 | 760 |
| 2 | 5185 | 650 |
The pipe has an outer diameter of 20.5 inches and a wall thickness of 0.25 inches. The ASME code allows for a maximum pressure of 2.2 in pipework. The ASME code prescribes an allowed stress (S) of 16,000 psi for this material throughout a temperature range of -20F to +100F. This means that the average annual strain rate is 1.6 x 10-5 per inch, or 160 microstrain per meter.
A microstrain is one ten-millionth of a percent. So the average annual strain rate is 160 microstrain per meter, which means that the maximum permissible stress is:
Maximum pressure = (flow rate) x (pipe inner diameter) x (wall thickness) / (annual strain rate)
Or
Maximum pressure = (120 cubic feet per minute) x (20.5 inches) x (0.25 inches) / (1.6 x 10-5 per inch)
Maximum pressure = 60,000 pounds per square inch
Or, if you want it in terms of forces:
Force = flow rate x pipe inner diameter x wall thickness / annual strain rate
Pressure = force / area
Schedule 40 1.5-inch diameter PVC pipe can withstand 954 pounds of tensile strength, whereas schedule 80 1.5-inch diameter PVC pipe can withstand 1225 pounds of tensile strength, according to pvcfittingonline.com. Tensile strength is simply the maximum amount of weight that can be applied to anything before it breaks. So, if you were to connect several pieces of schedule 40 pipe together, they could support up to 954 pounds, while schedule 80 pipe could support about 1800 pounds.
PVC pipe is very strong and can be used for heavy duty applications where other materials would not be as effective. For example, PVC pipe is commonly used instead of steel or concrete when building forms for landscaping projects or when creating outdoor furniture because it's easy to work with, won't rust, and won't damage your yard when removed.
The weight that PVC pipe can withstand depends on the size of the pipe, so always use the correct size pipe for any project. If you were to use two pieces of schedule 40 pipe instead of one piece of schedule 80 pipe, then you could increase the capacity by 36%. Here are some more useful facts about PVC pipe: It's inexpensive and available in many lengths and sizes. One square foot of PVC sheeting costs around $10-20, depending on the type used. The average home renovation project requires between 2-10 feet of pipe, which comes to about 30-120 linear feet. That's enough pipe to go around the block a few times!
Wrought steel standardization begins with the mass manufacturing era, with the pipe schedule and pipe diameters. Based on the iron pipe size (IPS) system, pipes were only available in three sizes at the time: standard weight (STD), extra-strong (XS), and double extra-strong (XXS). The XXS size was introduced around 1970 and is no longer produced.
Over time, more sophisticated methods have been developed to produce stronger pipes without changing the size. Today's standards include heavy duty (HD), super-heavy (SH), and triple-strength (TS) for XS size; mighty (MD), powerful (PD), and triple-mighty (TM) for STD size; and gigantic (LG), ultra-gigantic (UG), quadruple-giant (QG), and octuple-giant (OG) for XXS size.
The common sense rule is that the larger the diameter of the pipe, the heavier it will be. But there are exceptions to this rule. For example, an XS 10mm pipe can weigh as much as an HD 15mm pipe of the same size. This is because XS 10mm pipe has thicker walls than HD 15mm pipe.
The most common sizes of wrought steel pipe are listed below. They may not be the only options available but they are a good place to start when buying pipeline materials.
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