PipeData

Schedule 10 Pipe Dimensions

Wall thickness, bore and plain-end weight for all 30 sizes ASME B36.10M publishes in schedule 10, NPS 1/8 through NPS 36.

Schedule
Schedule 10
Sizes published
30 (NPS 1/8 to NPS 36)
Thinnest wall
0.049 in (1.2 mm) at NPS 1/8
Thickest wall
0.312 in (7.9 mm) at NPS 26
Standard
ASME B36.10M

Where schedule 10 is used

Schedule 10 is a light wall used for low-pressure service. Its best known use in carbon steel is fire sprinkler piping joined with roll-grooved couplings; in stainless, as Schedule 10S, it is a common choice for process and food-grade lines. It is too thin to thread.

Pipe wall thickness to scale, Schedule 10Pipe cross-sections drawn to scale at the same outside diameter so the wall thicknesses can be compared. NPS 1/8: 0.049 in wall on 0.405 in OD; NPS 8: 0.148 in wall on 8.625 in OD; NPS 36: 0.312 in wall on 36.000 in ODNPS 1/80.049 in wall on 0.405 in ODNPS 80.148 in wall on 8.625 in ODNPS 360.312 in wall on 36.000 in OD
Schedule 10 in three sizes, each drawn to its own scale. The sections are drawn at the same width so that the wall can be compared with the diameter it belongs to. The wall gets thicker as the size goes up, but it takes up a smaller share of the pipe.

Schedule 10 in every size

Dimensions are given in inches, with the millimetre equivalent beneath in grey.

ASME B36.10M schedule 10 dimensions.
SizeDNOutside diameterWall thicknessInside diameterWeight, emptyWater (US gal/ft)This size
NPS 1/8DN 60.40510.29 mm0.0491.24 mm0.3077.80 mm0.190.28 kg/m0.004all schedules →
NPS 1/4DN 80.54013.72 mm0.0651.65 mm0.41010.41 mm0.330.49 kg/m0.007all schedules →
NPS 3/8DN 100.67517.14 mm0.0651.65 mm0.54513.84 mm0.420.63 kg/m0.012all schedules →
NPS 1/2DN 150.84021.34 mm0.0832.11 mm0.67417.12 mm0.671.00 kg/m0.019all schedules →
NPS 3/4DN 201.05026.67 mm0.0832.11 mm0.88422.45 mm0.861.28 kg/m0.032all schedules →
NPS 1DN 251.31533.40 mm0.1092.77 mm1.09727.86 mm1.412.09 kg/m0.049all schedules →
NPS 1 1/4DN 321.66042.16 mm0.1092.77 mm1.44236.63 mm1.812.69 kg/m0.085all schedules →
NPS 1 1/2DN 401.90048.26 mm0.1092.77 mm1.68242.72 mm2.093.11 kg/m0.115all schedules →
NPS 2DN 502.37560.32 mm0.1092.77 mm2.15754.79 mm2.643.93 kg/m0.190all schedules →
NPS 2 1/2DN 652.87573.02 mm0.1203.05 mm2.63566.93 mm3.535.26 kg/m0.283all schedules →
NPS 3DN 803.50088.90 mm0.1203.05 mm3.26082.80 mm4.346.45 kg/m0.434all schedules →
NPS 3 1/2DN 904.000101.60 mm0.1203.05 mm3.76095.50 mm4.987.41 kg/m0.577all schedules →
NPS 4DN 1004.500114.30 mm0.1203.05 mm4.260108.20 mm5.628.36 kg/m0.740all schedules →
NPS 5DN 1255.563141.30 mm0.1343.40 mm5.295134.49 mm7.7811.57 kg/m1.144all schedules →
NPS 6DN 1506.625168.27 mm0.1343.40 mm6.357161.47 mm9.3013.84 kg/m1.649all schedules →
NPS 8DN 2008.625219.07 mm0.1483.76 mm8.329211.56 mm13.4119.96 kg/m2.830all schedules →
NPS 10DN 25010.750273.05 mm0.1654.19 mm10.420264.67 mm18.6727.78 kg/m4.430all schedules →
NPS 12DN 30012.750323.85 mm0.1804.57 mm12.390314.71 mm24.1935.99 kg/m6.263all schedules →
NPS 14DN 35014.000355.60 mm0.2506.35 mm13.500342.90 mm36.7554.69 kg/m7.436all schedules →
NPS 16DN 40016.000406.40 mm0.2506.35 mm15.500393.70 mm42.0962.64 kg/m9.802all schedules →
NPS 18DN 45018.000457.20 mm0.2506.35 mm17.500444.50 mm47.4470.59 kg/m12.495all schedules →
NPS 20DN 50020.000508.00 mm0.2506.35 mm19.500495.30 mm52.7878.55 kg/m15.514all schedules →
NPS 22DN 55022.000558.80 mm0.2506.35 mm21.500546.10 mm58.1386.50 kg/m18.860all schedules →
NPS 24DN 60024.000609.60 mm0.2506.35 mm23.500596.90 mm63.4794.46 kg/m22.532all schedules →
NPS 26DN 65026.000660.40 mm0.3127.92 mm25.376644.55 mm85.68127.50 kg/m26.273all schedules →
NPS 28DN 70028.000711.20 mm0.3127.92 mm27.376695.35 mm92.35137.43 kg/m30.577all schedules →
NPS 30DN 75030.000762.00 mm0.3127.92 mm29.376746.15 mm99.02147.35 kg/m35.208all schedules →
NPS 32DN 80032.000812.80 mm0.3127.92 mm31.376796.95 mm105.69157.28 kg/m40.166all schedules →
NPS 34DN 85034.000863.60 mm0.3127.92 mm33.376847.75 mm112.36167.21 kg/m45.449all schedules →
NPS 36DN 90036.000914.40 mm0.3127.92 mm35.376898.55 mm119.03177.13 kg/m51.060all schedules →

Weight is plain-end carbon steel, w = 10.69 × t × (OD − t) lb/ft.

How the wall changes with size

The wall in schedule 10 is 0.049 in (1.2 mm) at NPS 1/8 and 0.312 in (7.9 mm) at NPS 36. Measured against the pipe it belongs to, that is 12.1% of the outside diameter at the small end and 0.9% at the large end, so the wall does not keep pace with the diameter. The pressure the pipe will hold moves the same way. On the basis used throughout this site (ASME B31.3, S = 20,000 psi, nominal wall, no corrosion allowance) schedule 10 holds about 5,358 psig at NPS 1/8 and about 349 psig at NPS 36. A schedule is therefore chosen size by size, from a calculation, and not once for a whole plant.

From NPS 26 up to NPS 36 the wall is the same in every size, 0.312 in (7.9 mm). Over that range schedule 10 is a fixed thickness and no longer a series that climbs with the size.

Guides and comparisons for this page

Schedule 10 vs Schedule 40What the lighter wall saves and what it gives up.Schedule 5S vs Schedule 10SThe two light stainless walls side by side.What a pipe schedule actually isWhy a schedule is a wall series and not a thickness.Pipe wall thickness calculationBarlow and ASME B31.3, corrosion allowance and mill tolerance.Pipe sizing by flow rate and velocityTurn a flow rate into a line size using velocity limits.

Common questions

What sizes is schedule 10 pipe made in?

ASME B36.10M publishes schedule 10 in 30 sizes, from NPS 1/8 through NPS 36. Wall thickness runs from 0.049 in (1.2 mm) at the small end to 0.312 in (7.9 mm) at the large end.

Does schedule 10 mean the same wall thickness in every size?

No. It is a series, not a thickness. The wall is 0.049 in (1.2 mm) at NPS 1/8 and 0.312 in (7.9 mm) at NPS 36, so the thickness always has to be read off the table for the size in hand.

How pipe schedules work →