All About Schedule 40 Steel Pipe

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sch 40 pipe

Steel pipes are offered in several grades. These grades are likewise organized into schedules. A particular schedule includes a set of norms for measuring pipe thickness. As the number increases, so does the pipe’s thickness. Schedule 40 steel pipe is one example of a versatile pipe with proven performance. These pipes can be zinc-coated using two methods: in-line galvanization and hot-dip galvanization. Hot-dip galvanizing of sch 40 pipe allows the zinc to bind to the pipe. Schedule 40 pipe pressure ratings are also described as regular and of high strength. NPS and scheduled pipes can provide information about a pipe’s outer diameter and wall thickness, For example, NPS 14 schedule 40 pipes will have an outer diameter of 14 cm and a wall thickness of 0.437 inch. The schedule number specifies the inside and exterior diameters of the pipe. 

The below table shows schedule 40 pipes dimensions. The weight of schedule 40 steel pipes varies depending on their size. In general, the sch 40 pipe weight per foot is 1.68 pounds. Each pipe has its own advantage, and so does the schedule 40 pipes. These schedule 40 pipe dimensions have thinner walls, making them ideal for low-pressure applications. One must ensure that the sch 40 pipe dimensions fulfill the requirements of your application. It has the same strength as its weakest spot. A variation in pressure can have an instantaneous effect on its performance. 

The thickness of sch 40 pipes can be found using the data provided. Previously, schedule 40 steel pipe specifications were separated into three sections: normal weight (STD), double extra strong (XXS), and extremely strong (XS). These classifications were based on the pipe sizes. Though Schedule 40 Steel Pipes vendors thought these classes to be phased out, they continue to exist and are widely used. ISO 6708 defines DN as a dimensionless definition that is indirectly connected to diameter. As a result, it does not directly correlate to the size or schedule 40 pipe thickness in millimetres. Initially, the NPS values were assigned the same inner diameter; however, as the schedule 40 pipe thickness increased, the inside diameter varied, and NPS became only indirectly tied to the inside and outside diameters. For years, we have been creating sch 40 pipes with mm dimensions and modifying them to meet the needs of the application. Schedule 40 pipes vary in weight depending on the amount of metal used and the thickness of the wall. 

schedule 40 pipes thickness in mm

Nominal size [inches]Outside diameter [inches]Outside diameter [mm]Wall thickness [inches]Wall thickness [mm]Weight [lb/ft]Weight [kg/m]
1/8 inches0.405 inches10.3 MM0.068 inches1.73 MM0.24 lb/ft0.37 kg/m
1/4 inches0.540 inches13.7 MM0.088 inches2.24 MM0.42 lb/ft0.84 kg/m
1/2 inches0.840 inches21.3 MM0.109 inches2.77 MM0.85 lb/ft1.27 kg/m
3/4 inches1.050 inches26.7 MM0.113 inches2.87 MM1.13 lb/ft1.69 kg/m
1 inches1.315 inches33.4 MM0.133 inches3.38 MM1.68 lb/ft2.50 kg/m
1 1/4 inches1.660 inches42.2 MM0.140 inches3.56 MM2.27 lb/ft3.39 kg/m
1 1/2 inches1.900 inches48.3 MM0.145 inches3.68 MM2.72 lb/ft4.05 kg/m
2 inches2.375 inches60.3 MM0.154 inches3.91 MM3.65 lb/ft5.44 kg/m
2 1/2 inches2.875 inches73.0 MM0.203 inches5.16 MM5.79 lb/ft8.63 kg/m
3 inches3.500 inches88.9 MM0.216 inches5.49 MM7.58 lb/ft11.29 kg/m
3 1/2 inches4.000 inches101.6 MM0.226 inches5.74 MM9.11 lb/ft13.57 kg/m
4 inches4.500 inches114.3 MM0.237 inches6.02 MM10.79 lb/ft16.07 kg/m
5 inches5.563 inches141.3 MM0.258 inches6.55 MM14.62 lb/ft21.77 kg/m
6 inches6.625 inches168.3 MM0.280 inches7.11 MM18.97 lb/ft28.26 kg/m
8 inches8.625 inches219.1 MM0.322 inches8.18 MM28.55 lb/ft42.55 kg/m
10 inches10.750 inches273.0 MM0.365 inches9.27 MM40.48 lb/ft60.31 kg/m
12 inches12.750 inches323.8 MM0.406 inches10.31 MM53.52 lb/ft79.73 kg/m
14 inches14 inches355.6 MM0.375 inches11.13 MM54.57 lb/ft94.55 kg/m
16 inches16 inches406.4 MM0.500 inches12.70 MM82.77 lb/ft123.30 kg/m
18 inches18 inches457.0 MM0.562 inches14.27 MM104.67 lb/ft155.80 kg/m
20 inches20 inches508.0 MM0.594 inches15.09 MM123.11 lb/ft183.42 kg/m
24 inches24 inches610.0 MM0.688 inches17.48 MM171.29 lb/ft255.41 kg/m
32 inches32 inches813.0 MM0.688 inches17.48 MM230.08 lb/ft342.91 kg/m

schedule 40 pipes pressure rating

Maximum Allowable Pressure (psi)  (kPa)
NPSOutside DiameterSchedule
(inch)(inch)(mm)40
1/4 inch0.54 inch13.7 mm798555057
3/8 inch0.675 inch17.1 mm660645548
1/2 inch0.84 inch21.3 mm635843838
3/4 inch1.05 inch26.7 mm527336357
1 inch1.315 inch33.4 mm495634172
1 1/4 inch1.66 inch42.2 mm413328497
1 1/2 inch1.9 inch48.3 mm373925780
2 inch2.375 inch60.3 mm317721905
2 1/2 inch2.875 inch73 mm346023857
3 inch3.5 inch88.9 mm302420850
3 1/2 inch4 inch102 mm276919092
4 inch4.5 inch114 mm258117796
5 inch5.563 inch141 mm227315672
6 inch6.625 inch168 mm207114280
8 inch8.625 inch219 mm182912611
10 inch10.75 inch273 mm166411473
12 inch12.75 inch324 mm156010756
14 inch14 inch356 mm153310570
16 inch16 inch406 mm153110556
18 inch18 inch457 mm153010549
20 inch20 inch508 mm145510032
22 inch22 inch559 mm
24 inch24 inch610 mm14059687
30 inch30 inch762 mm
32 inch32 inch813 mm10547267
34 inch34 inch864 mm9926840
36 inch36 inch914 mm10217040
42 inch42 inch1067 mm8756033

Nominal Wall Thickness for Schedule 40 Pipe

Sch 40 Pipe Dimensions

PipeSize*O.D.(in.)Schedule (40)Wall Thickness (in.)**
Sch.40
Wall (in)I.D. (in)
1/8″0.41 od0.07 in0.269 id
Weight(lbs/ft.)Steel0.247 lbs/ft
Stainless
Aluminum 
1/4″0.54 od0.090 in0.364 id
Weight(lbs/ft.)Steel0.429 lbs/ft
Stainless
Aluminum0.147 lbs/ft
3/8″0.675 od0.091 in0.493 id
Weight(lbs/ft.)Steel0.570 lbs/ft
Stainless
Aluminum0.196 lbs/ft
1/2″0.840 od0.109 in0.622 id
Weight(lbs/ft.)Steel0.850 lbs/ft
Stainless
Aluminum0.294 lbs/ft
3/4″1.050 od0.113 in0.824 id
Weight(lbs/ft.)Steel1.13 lbs/ft
Stainless
Aluminum0.391
1″1.315 od0.133 in1.049 id
Weight(lbs/ft.)Steel1.68 lbs/ft
Stainless
Aluminum0.581 lbs/ft
1-1/4″1.66 od0.140 in1.380 id
Weight(lbs/ft.)Steel2.27 lbs/ft
Stainless
Aluminum0.785 lbs/ft
1-1/2″1.90 od0.145 in1.610 id
Weight(lbs/ft.)Steel2.72 lbs/ft
Stainless
Aluminum0.939 lbs/ft
2″2.375 od0.154 in2.067 id
Weight(lbs/ft.)Steel3.66 lbs/ft
Stainless
Aluminum1.260 lbs/ft
2-1/2″2.875 od0.203 in2.469 id
Weight(lbs/ft.)Steel5.80 lbs/ft
Stainless
Aluminum2.000 lbs/ft
3″3.50 od0.216 in3.068 id
Weight(lbs/ft.)Steel7.58 lbs/ft
Stainless
Aluminum2.620 lbs/ft
3-1/2″4.00 od0.226 in3.550 id
Weight(lbs/ft.)Steel9.12 lbs/ft
Stainless
Aluminum3.150 lbs/ft
4″4.50 od0.237 in4.026 id
Weight(lbs/ft.)Steel10.80 lbs/ft
Stainless
Aluminum3.730 lbs/ft
5″5.563 od0.258 in5.047 id
Weight(lbs/ft.)Steel14.63 lbs/ft
Stainless
Aluminum5.050 lbs/ft
6″6.625 od0.280 in6.065 id
Weight(lbs/ft.)Steel18.99 lbs/ft
Stainless
Aluminum6.560 lbs/ft
8″8.625 od0.322 in7.981 id
Weight(lbs/ft.)Steel28.58 lbs/ft
Stainless
Aluminum9.88 lbs/ft

schedule 40 pipes Size Chart

Schedule 40 Line Pipes Weights

Pipe Schedules (according to ASME/ANSI B36.10M)

Schedule 40 Steel Pipes Price

SIZE INCHSIZE Nominal BoreMSL PRICE LISTISMT PRICE LISTJSL PRICE LISTUSL PRICE LISTBAO PRICE LISTLontrin PRICE LISTSMTM PRICE LISTTNRS PRICE LISTV&M PRICE LISTWuxi PRICE LIST
1/2151,323.531,316.181,330.88– 1,029.411,036.761,460.591,396.061,425.471,012.06
3/4201,102.941,095.591,110.29– 954.88963.241,250.001,176.471,205.88938.53
125945.88948.53963.24– 881.35889.711,102.941,029.411,058.82875.00
1.2532901.76904.41919.12– 851.94860.291,058.82985.291,014.71845.59
1.540808.82801.47816.18– 807.82816.18955.88882.35911.76801.47
250784.12786.76801.47– 617.65625.00941.18867.65897.06610.29
2.565784.12786.76801.47– 617.65625.00941.18867.65897.06610.29
380794.12786.76801.47– 617.65625.00941.18867.65897.06610.29
3.590794.12786.76801.47– 617.65625.00941.18867.65897.06610.29
4100794.12786.76801.47735.29617.65625.00941.18867.65897.06610.29
5125794.12786.76801.47735.29617.65625.00941.18867.65897.06610.29
6150794.12786.76801.47735.29617.65625.00941.18867.65897.06610.29
8200794.12786.76801.47735.29647.06654.41941.18867.65897.06639.71
10250794.12786.76– 735.29647.06654.41941.18867.65897.06639.71
12300852.94– – 735.29647.06654.411,000.00926.47955.88639.71
14350852.94– – 735.29661.76669.121,000.00926.47955.88654.41
16400882.35– – – 661.76669.121,029.41955.88985.29654.41
18450882.35– – – 676.47683.821,029.41955.88985.29669.12
20500882.35– – – 676.47683.821,029.41955.88985.29669.12
22550– – – – 705.88713.241,176.471,029.411,132.35698.53
24600– – – – 705.88713.241,176.471,029.

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