Schedule 80 Carbon Steel Pipe – SCH 80 / XS Wall Thickness, Weight & Pressure Rating
ASC LLP, Mumbai, supplies Schedule 80 carbon steel pipe (SCH 80 / XS) in seamless and ERW construction. Grades include ASTM A106 Grade B, ASTM A53 Grade B, API 5L and A333 Grade 6, from ⅛” to 24″ NB, with EN 10204 3.1 certificates. This page gives the full SCH 80 wall-thickness, weight and pressure-rating charts. See our full carbon steel range.
What is Schedule 80 Carbon Steel Pipe?
“Schedule” is the ASME B36.10M wall-thickness designation for steel pipe. Schedule 80 pipe has a thicker wall than Schedule 40 for the same nominal size. The outside diameter stays the same, so the inside diameter is smaller and the pipe is heavier and takes higher pressure. For example, 2″ SCH 80 has a 5.54 mm (0.218″) wall, against 3.91 mm (0.154″) for SCH 40. Schedule 80 is used where pressure, mechanical loads, threading or corrosion allowance call for extra wall.
Schedule 80 Pipe – Quick Facts
- Dimension standard: ASME B36.10M (welded and seamless wrought steel pipe)
- Sizes: ⅛” – 24″ NB (10.3 – 609.6 mm OD)
- Grades: ASTM A106 B / C, A53 B, API 5L B / X42 – X70, A333 Gr 6, A335 P11 / P22 (alloy)
- Type: seamless (SMLS), ERW, LSAW for large sizes
- Ends: plain, bevelled (for butt welding) or threaded
- Certificate: EN 10204 3.1; 3.2 / third-party inspection on request
Schedule 80 vs XS (Extra Strong) – Are They the Same?
Up to 8″ NB, Schedule 80 and XS (Extra Strong / XH) have the same wall thickness. From 10″ upwards they differ: XS stays at 12.70 mm (0.500″), while SCH 80 gets thicker – 15.09 mm at 10″ and 17.48 mm at 12″. Always state both the schedule and the wall thickness on large-size orders.
- High pressure capacity: roughly 40 – 60% higher than SCH 40 in the same size.
- Threading: the extra wall leaves more metal under the threads – SCH 80 is often specified for threaded small-bore lines.
- Corrosion / erosion allowance: more wall to lose before the pressure limit is reached.
- Corrosion protection: carbon steel is not corrosion-resistant – galvanised, painted or lined pipe is used where needed.
Types of Schedule 80 Pipe We Supply
- SCH 80 seamless pipe – ASTM A106 Gr B / A53 Type S / API 5L PSL1–PSL2, preferred for high pressure and high temperature.
- SCH 80 ERW pipe – ASTM A53 Type E and API 5L ERW, economical for general process and structural use.
- SCH 80 low-temperature pipe – ASTM A333 Grade 6 for service down to −45 °C.
- Galvanised SCH 80 pipe – A53 hot-dip galvanised for water and outdoor service.
- SCH 80 alloy pipe – A335 P11 / P22 for high-temperature steam lines, on request.
Need a thinner wall? See Schedule 40 carbon steel pipe.
Schedule 80 Pipe Wall Thickness & Weight Chart (ASME B36.10M)
| NPS | OD (mm) | Wall (mm) | Wall (in) | ID (mm) | Weight (kg/m) |
| ⅛” | 10.29 | 2.41 | 0.095 | 5.47 | 0.47 |
| ¼” | 13.72 | 3.02 | 0.119 | 7.68 | 0.80 |
| ⅜” | 17.15 | 3.20 | 0.126 | 10.75 | 1.10 |
| ½” | 21.34 | 3.73 | 0.147 | 13.88 | 1.62 |
| ¾” | 26.67 | 3.91 | 0.154 | 18.85 | 2.19 |
| 1″ | 33.40 | 4.55 | 0.179 | 24.30 | 3.24 |
| 1¼” | 42.16 | 4.85 | 0.191 | 32.46 | 4.46 |
| 1½” | 48.26 | 5.08 | 0.200 | 38.10 | 5.41 |
| 2″ | 60.33 | 5.54 | 0.218 | 49.25 | 7.49 |
| 2½” | 73.03 | 7.01 | 0.276 | 59.01 | 11.41 |
| 3″ | 88.90 | 7.62 | 0.300 | 73.66 | 15.27 |
| 4″ | 114.30 | 8.56 | 0.337 | 97.18 | 22.32 |
| 5″ | 141.30 | 9.53 | 0.375 | 122.24 | 30.97 |
| 6″ | 168.28 | 10.97 | 0.432 | 146.34 | 42.56 |
| 8″ | 219.08 | 12.70 | 0.500 | 193.68 | 64.63 |
| 10″ | 273.05 | 15.09 | 0.594 | 242.87 | 95.99 |
| 12″ | 323.85 | 17.48 | 0.688 | 288.89 | 132.06 |
| 14″ | 355.60 | 19.05 | 0.750 | 317.50 | 158.10 |
| 16″ | 406.40 | 21.44 | 0.844 | 363.52 | 203.53 |
| 18″ | 457.20 | 23.83 | 0.938 | 409.54 | 254.67 |
| 20″ | 508.00 | 26.19 | 1.031 | 455.62 | 311.17 |
| 24″ | 609.60 | 30.96 | 1.219 | 547.68 | 441.78 |
Plain-end weights for carbon steel (7.85 g/cm³). XS wall equals SCH 80 up to 8″; XS is 12.70 mm for 10″ and larger.
Schedule 80 Pipe Pressure Rating – ASTM A106 Grade B
| NPS | Wall (mm) | Approx. max. pressure (MPa) | Approx. max. pressure (psi) |
| ½” | 3.73 | 48.1 | 6,970 |
| ¾” | 3.91 | 39.4 | 5,720 |
| 1″ | 4.55 | 36.3 | 5,270 |
| 1¼” | 4.85 | 30.2 | 4,380 |
| 1½” | 5.08 | 27.4 | 3,980 |
| 2″ | 5.54 | 23.7 | 3,430 |
| 2½” | 7.01 | 24.8 | 3,600 |
| 3″ | 7.62 | 22.0 | 3,190 |
| 4″ | 8.56 | 19.1 | 2,770 |
| 5″ | 9.53 | 17.1 | 2,480 |
| 6″ | 10.97 | 16.5 | 2,390 |
| 8″ | 12.70 | 14.6 | 2,110 |
| 10″ | 15.09 | 13.9 | 2,010 |
| 12″ | 17.48 | 13.5 | 1,960 |
| 14″ | 19.05 | 13.4 | 1,950 |
| 16″ | 21.44 | 13.2 | 1,920 |
| 18″ | 23.83 | 13.1 | 1,890 |
| 20″ | 26.19 | 12.9 | 1,870 |
| 24″ | 30.96 | 12.7 | 1,840 |
Basis: ASME B31.3 straight-pipe formula P = 2SEt / (D − 2Yt), with S = 137.9 MPa (20 ksi, A106 Gr B up to about 204 °C / 400 °F), E = 1.0 (seamless), Y = 0.4, wall reduced by 12.5% mill tolerance, plain-end pipe, no corrosion allowance. Ratings fall at higher temperatures, for ERW pipe (lower E), when a corrosion allowance is added, and for threaded pipe (subtract thread depth). These are guide values only – the design must be checked by the piping engineer.
Schedule 80 Carbon Steel Pipe Specifications
| Item | Details |
| Dimensions | ASME B36.10M, Schedule 80 / XS |
| Seamless grades | ASTM A106 Gr B / C, A53 Type S Gr B, API 5L Gr B – X70 PSL1 / PSL2, A333 Gr 6 |
| Welded grades | ASTM A53 Type E Gr B, API 5L ERW / LSAW |
| Size range | ⅛” – 24″ NB |
| Length | Single random (5 – 7 m), double random (11 – 13 m), cut lengths |
| Ends | Plain end, bevelled end (30° ±5°), threaded & coupled |
| Coating | Black varnish, bare, hot-dip galvanised, 3LPE / FBE on request |
| Testing | Hydrostatic, NDT (UT / eddy current), tensile, flattening, bend |
Chemical Composition – ASTM A106 Grade B (most common SCH 80 grade)
| Element | ASTM A106 Gr B (%) |
| Carbon (C) | 0.30 max |
| Manganese (Mn) | 0.29 – 1.06 |
| Phosphorus (P) | 0.035 max |
| Sulphur (S) | 0.035 max |
| Silicon (Si) | 0.10 min |
| Copper (Cu) | 0.40 max |
| Nickel (Ni) | 0.40 max |
| Chromium (Cr) | 0.40 max |
| Molybdenum (Mo) | 0.15 max |
| Vanadium (V) | 0.08 max |
Mechanical properties of A106 Gr B: tensile 415 MPa (60 ksi) min, yield 240 MPa (35 ksi) min. A53 Gr B has the same minimum tensile and yield strength.
Physical Properties of Carbon Steel Pipe
| Property | Value (carbon steel, approx.) |
| Density | 7.85 g/cm³ |
| Modulus of elasticity | ≈ 200 GPa |
| Thermal conductivity | ≈ 50 W/m·K |
| Thermal expansion (20–100 °C) | ≈ 11.7 µm/m·°C |
| Magnetic | Ferromagnetic |
Schedule 80 vs Schedule 40 Steel Pipe – What’s the Difference?
| NPS | SCH 40 wall (mm) | SCH 80 wall (mm) | SCH 40 weight (kg/m) | SCH 80 weight (kg/m) | SCH 40 / SCH 80 pressure (psi, approx.) |
| ½” | 2.77 | 3.73 | 1.27 | 1.62 | 5,000 / 6,970 |
| 1″ | 3.38 | 4.55 | 2.50 | 3.24 | 3,810 / 5,270 |
| 2″ | 3.91 | 5.54 | 5.44 | 7.48 | 2,380 / 3,430 |
| 4″ | 6.02 | 8.56 | 16.07 | 22.32 | 1,910 / 2,770 |
| 6″ | 7.11 | 10.97 | 28.26 | 42.56 | 1,520 / 2,390 |
| 8″ | 8.18 | 12.70 | 42.55 | 64.63 | 1,340 / 2,110 |
Same OD, same pressure basis as above (A106 Gr B, seamless, 204 °C). Full Schedule 40 data: Schedule 40 carbon steel pipe.
Applications of Schedule 80 Steel Pipes
| Industry | Typical Schedule 80 pipe uses |
| Oil & gas | Wellhead, manifold and high-pressure process lines |
| Refining & petrochemical | Process piping, small-bore threaded and socket-weld lines |
| Power generation | Steam, condensate and boiler feed lines (with suitable grade) |
| Hydraulics & compressed air | High-pressure hydraulic and air lines |
| Fire protection & water | Threaded and grooved mains where extra wall is required |
| Structural | Piling, columns and heavy-duty supports |
Why Choose ASC LLP for Schedule 80 Steel Pipes?
- Correct grade and paperwork: SCH 80 pipe certified to ASTM A106 / A53 / API 5L / A333 with EN 10204 3.1 certificates.
- Full size range: ⅛” – 24″ NB, seamless and welded, cut lengths and threaded ends.
- Matching fittings: A106 Gr B fittings and A53 Gr B fittings in SCH 80.
- Export packing with bevel protectors, end caps and bundling.
Send size, grade, schedule, length and quantity to sales@amardeepsteel.com or call 022-67439130.
Frequently Asked Questions – Schedule 80 Carbon Steel Pipe
How thick is Schedule 80 pipe?
Schedule 80 wall thickness depends on pipe size. For example, ½” SCH 80 is 3.73 mm (0.147″), 1″ is 4.55 mm (0.179″), 2″ is 5.54 mm (0.218″), 4″ is 8.56 mm (0.337″) and 6″ is 10.97 mm (0.432″), per ASME B36.10M.
What is the pressure rating of Schedule 80 pipe?
For ASTM A106 Grade B seamless pipe at up to about 204 °C, using the ASME B31.3 formula with 12.5% mill tolerance and no corrosion allowance, approximate ratings are 6,970 psi for ½”, 3,430 psi for 2″, 2,770 psi for 4″ and 2,390 psi for 6″. Ratings are lower at higher temperature, for welded pipe and for threaded pipe.
Is Schedule 80 the same as XS (Extra Strong)?
Yes up to 8″ NB – SCH 80 and XS have the same wall thickness. From 10″ upwards XS stays at 12.70 mm (0.500″), while SCH 80 is thicker (15.09 mm at 10″, 17.48 mm at 12″).
What is the difference between Schedule 40 and Schedule 80 pipe?
Both have the same outside diameter, but Schedule 80 has a thicker wall, a smaller inside diameter, more weight and a higher pressure rating. For example, 2″ SCH 40 has a 3.91 mm wall and 5.44 kg/m weight, while 2″ SCH 80 has a 5.54 mm wall and 7.48 kg/m.
Which material grades are available in Schedule 80?
Schedule 80 carbon steel pipe is commonly supplied in ASTM A106 Grade B (seamless), ASTM A53 Grade B (seamless or ERW), API 5L, and ASTM A333 Grade 6 for low temperature, plus A335 alloy grades on request.
Can Schedule 80 pipe be threaded?
Yes. Schedule 80 is often chosen for threaded small-bore pipe because the thicker wall leaves more metal under the threads. The thread depth must be deducted when calculating the pressure rating of threaded pipe.
Global Reach
ASC LLP supplies carbon steel pipe, fittings and flanges to customers in the USA, Europe, the Middle East and Asia, with secure packing and full documentation. Buyers worldwide rely on our Schedule 80 carbon steel pipes for certified material and traceability.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
