Schedule 80 Pipe: Size Table, Pressure Rating Table And Comparison With Schedule 40

Contents hide

1 What is Schedule 80 Pipe?

2 Schedule 80 steel pipe dimensions in mm

3 Schedule 80 Pipes Pressure Rating

4 Schedule 80 Pipes Sizes

5 Characteristics of Schedule 80 Pipe

5.1 High-pressure bearing capacity

5.2 Corrosion resistance

5.3 Temperature resistance

5.4 Low maintenance cost in the later stage

6 Sch 40 vs Sch 80

What is Schedule 80 Pipe?

“Sch” is an indication method represented by ASME B36.10, indicating the specifications of steel pipes. Because most pipes are used to transport liquids and gases, the inner diameter of the pipe is very important. Schedule 80 does not indicate a specific pipe wall thickness, but a series of wall thicknesses. Schedule 80 is widely used in various industries and is in great demand. Schedule 80 also has additional strength and is heavier than Sch40.

Schedule 80 steel pipe dimensions in mm

Nominal size [inches]	Outside diameter [inches]	Outside diameter [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
1/2	0.840	21.3	0.083	2.11	0.68	1.00
3/4	1.050	26.7	0.083	2.11	0.87	1.29
1	1.315	33.4	0.109	2.77	1.41	2.11
1 1/4	1.660	42.2	0.109	2.77	1.82	2.71
1 1/2	1.900	48.3	0.109	2.77	2.1	3.13
2	2.375	60.3	0.109	2.77	2.66	3.96
2 1/2	2.875	73.0	0.120	3.05	3.56	5.29
3	3.500	88.9	0.120	3.05	4.37	6.50
3 1/2	4.000	101.6	0.120	3.05	5.01	7.46
4	4.500	114.3	0.120	3.05	5.66	8.42
5	5.563	141.3	0.134	3.40	7.82	11.64
6	6.625	168.3	0.134	3.40	9.35	13.91
8	8.625	219.1	0.148	3.76	13.50	20.10
10	10.750	273.1	0.165	4.19	18.79	27.96
12	12.750	323.9	0.180	4.57	24.34	36.22
14	14.000	355.6	0.188	4.78	27.97	41.62
16	16.000	406.4	0.188	4.78	32.02	47.65
18	18.000	457.0	0.188	4.78	36.05	53.65
20	20.000	508.0	0.218	5.54	46.42	69.09
22	22.000	559.0	0.218	5.54	51.14	76.10
24	24.000	610.0	0.250	6.35	63.93	95.13
30	30.000	762.0	0.312	7.92	99.60	148.22

Schedule 80 Pipes Pressure Rating

Maximum Allowable Pressure (psi) (kPa)
NPS	Outside Diameter	Schedule
(inch)	(inch) (mm)	10	20	30	STD	40	60	XS	80	100	120	140	160	XXS
1/4 Inch	0.54 Inch 13.7				7985 55057	7985 55057		10798 74452	10798 74452
3/8 Inch	0.675 Inch 17.1				6606 45548	6606 45548		9147 63069	9147 63069
1/2 Inch	0.84 Inch 21.3				6358 43838	6358 43838		8575 59125	8575 59125				10908 75211	17150 118249
3/4 Inch	1.05 Inch 26.7				5273 36357	5273 36357		7187 49554	7187 49554				10220 70467	14373 99102
1 Inch	1.315 Inch 33.4				4956 34172	4956 34172		6670 45990	6670 45990				9316 64234	13340 91979
1 1/4 Inch	1.66 Inch 42.2				4133 28497	4133 28497		5638 38874	5638 38874				7380 50885	11276 77748
1 1/2 Inch	1.9 Inch 48.3				3739 25780	3739 25780		5158 35564	5158 35564				7247 49968	10316 71129
2 Inch	2.375 Inch 60.3				3177 21905	3177 21905		4498 31014	4498 31014				7097 48934	8995 62021
2 1/2 Inch	2.875 Inch 73				3460 23857	3460 23857		4704 32434	4704 32434				6391 44066	9408 64868
3 Inch	3.5 Inch 88.9				3024 20850	3024 20850		4200 28959	4200 28959				6132 42280	8400 57918
3 1/2 Inch	4 Inch 102				2769 19092	2769 19092		3896 26863	3896 26863
4 Inch	4.5 Inch 114				2581 17796	2581 17796		3670 25305	3670 25305		4769 32882		5782 39867	7339 50602
5 Inch	5.563 Inch 141				2273 15672	2273 15672		3303 22774	3303 22774		4404 30366		5505 37957	6606 45548
6 Inch	6.625 Inch 168				2071 14280	2071 14280		3195 22030	3195 22030		4157 28663		5318 36668	6390 44059
8 Inch	8.625 Inch 219		1420 9791	1574 10853	1829 12611	1829 12611	2307 15907	2841 19589	2841 19589	3375 23271	4085 28166	4613 31807	5147 35489	4971 34275
10 Inch	10.75 Inch 273		1140 7860	1399 9646	1664 11473	1664 11473	2279 15714	2279 15714	2708 18672	3277 22595	3847 26525	4558 31427	5128 35358	4558 31427
12 Inch	12.75 Inch 324		961 6626	1268 8743	1441 9936	1560 10756	2160 14893	1922 13252	2644 18230	3244 22367	3843 26497	4324 29814	5042 34765	3843 26497
14 Inch	14 Inch 356	875 6033	1092 7529	1313 9053	1313 9053	1533 10570	2079 14335	1750 12066	2625 18099	3283 22636	3829 26401	4375 30166	4921 33930
16 Inch	16 Inch 406	766 5282	956 6592	1148 7915	1148 7915	1531 10556	2009 13852	1531 10556	2585 17824	3157 21768	3733 25739	4404 30366	4882 33661
18 Inch	18 Inch 457	681 4695	849 5854	1192 8219	1021 7040	1530 10549	2042 14080	1361 9384	2553 17603	3147 21699	3743 25808	4252 29318	4848 33427
20 Inch	20 Inch 508	613 4227	919 6337	1225 8446	919 6337	1455 10032	1989 13714	1225 8446	2526 17417	3138 21637	3675 25339	4288 29566	4824 33261
22 Inch	22 Inch 559	557 3841	835 5757	1114 7681	835 5757		1949 13438	1114 7681	2506 17279	3063 21119	3619 24953	4176 28794	4733 32634
24 Inch	24 Inch 610	510 3516	766 5282	1147 7909	766 5282	1405 9687	1978 13638	1021 7040	2489 17162	3126 21554	3700 25512	4210 29028	4786 32999
30 Inch	30 Inch 762	510 3516	817 5633	1021 7040	613 4227			817 5633
32 Inch	32 Inch 813	478 3296	766 5282	957 6599	574 3958	1054 7267
34 Inch	34 Inch 864	450 3103	721 4971	901 6212	540 3723	992 6840
36 Inch	36 Inch 914	425 2930	681 4695	851 5868	510 3516	1021 7040
42 Inch	42 Inch 1067		583 4020	729 5026	438 3020	875 6033

Schedule 80 Pipes Sizes

NPS	1/2	3/4	1	1¼	1½	2	2½	3	3½	4
DN	15	20	25	32	40	50	65	80	90	100

schedule 80 pipe

Characteristics of Schedule 80 Pipe

High-pressure bearing capacity

Due to its thick-wall design, Schedule 80 can withstand high-pressure work and is suitable for high-pressure water pipes and chemical transportation.

Corrosion resistance

The pipe has excellent chemical corrosion resistance and can resist the erosion of various acids, alkalis and chemicals, making it suitable for the transportation of chemical fluids.

Temperature resistance

When the pipe is in use, it will produce temperature fluctuations under various influences. It is very important to maintain the pipe structure when the temperature changes. Sch80 can withstand extremely high or extremely low temperatures and can adapt to a very wide temperature range.

Low maintenance cost in the later stage

Although the initial investment purchase cost of Sch80 pipes is high, due to its high durability and no need for frequent replacement and maintenance, the later maintenance cost is extremely low.

Sch 40 vs Sch 80

Thickness: Thickness is the main physical difference between 40 and 80. The higher the grade, the thicker the material of the pipe and fittings.
Pressure: Wall thickness is one of the factors that directly affect the ability to withstand pressure. The higher the pipe number, the thicker the wall thickness, and the better its pressure bearing capacity.
Cost: Sch80 is thicker, so more material is required than Sch40, resulting in a slightly higher cost for Sch80.
Application: Sch40 is generally suitable for low-pressure environments, while Sch80 focuses more on medium and high-pressure environments.

Schedule 80 Pipe: Size Table, Pressure Rating Table And Comparison With Schedule 40

What is Schedule 80 Pipe?

Schedule 80 steel pipe dimensions in mm

Schedule 80 Pipes Pressure Rating

Schedule 80 Pipes Sizes