We offer Schedule 40 Sch 40S thickness stainless steel pipe in a large range of dimensions, the commonly used grades have 304/304L 316/316L stainless steel, Schedule 40 pipe is used for high-pressure and high-temperature conditions, typically in fluid transportation including water, oil & gas, petrochemical engineering & chemical.
There are wide stainless steel pipe dimensions to choose from, large diameter, heavy wall, or small diameter is available, the SCH is an abbreviation of Schedule, schedule 40 refers to the wall thickness of the pipe, the wall thickness varies based on the nominal pipe size (NPS) accordingly, the thicker the wall thickness with the same NPS dimensions when the number increases, for example, Sch 80 pipe is thicker than Sch 40 pipe at NPS 3″ diameter.
The relationship between pipe size, schedules and wall thicknesses is simply to refer to a conversion chart in mm based on ASME B36.19 & ASME B36.10 dimensions, for Carbon Steel and Wrought iron Pipe as per ASME B36.10, for Stainless Steel Pipe as per ASME B36.19, the Schedule No. with the letter “S”, which means stainless steel and Schedule 40S stands for stainless steel pipe thickness.
Stainless Steel Pipe Specifications
| Specifications | ASTM A312, A358, A376, A409, A778 |
|---|---|
| Grade | 304/304L, 316/316L, 321 |
| Pipe Manufacture | Welded Or Seamless |
| Finish | Annealing Pickling Bright Annealing Polishing |
| Outside Diameter | NPS 1/8″ – 40″ |
| Schedule | Sch 5S Sch 10S Sch 10 Sch 20 Sch 30 Sch 40 STD Sch 40S Sch 60 Sch 80 XS Sch 80S Sch 100 Sch 120 Sch 140 Sch 160 XXS |
| Ends | Plain Ends Beveled Ends |
SCH 40S Pipe Dimension Chart, Wall Thickness in mm
| Nominal size [NPS] | OD [inches] | OD [mm] | Wall thickness [inches] | Wall thickness [mm] |
|---|---|---|---|---|
| 1/2 | 0.840 | 21.3 | 0.065 | 1.65 |
| 3/4 | 1.050 | 26.7 | 0.065 | 1.65 |
| 1 | 1.315 | 33.4 | 0.065 | 1.65 |
| 1 1/4 | 1.660 | 42.2 | 0.065 | 1.65 |
| 1 1/2 | 1.900 | 48.3 | 0.065 | 1.65 |
| 2 | 2.375 | 60.3 | 0.065 | 1.65 |
| 2 1/2 | 2.875 | 73.0 | 0.083 | 2.11 |
| 3 | 3.500 | 88.9 | 0.083 | 2.11 |
| 3 1/2 | 4.000 | 101.6 | 0.083 | 2.11 |
| 4 | 4.500 | 114.3 | 0.083 | 2.11 |
| 5 | 5.563 | 141.3 | 0.109 | 2.77 |
| 6 | 6.625 | 168.3 | 0.109 | 2.77 |
| 8 | 8.625 | 219.1 | 0.109 | 2.77 |
| 10 | 10.750 | 273.1 | 0.134 | 3.4 |
| 12 | 12.750 | 323.9 | 0.156 | 3.96 |
| 14 | 14.000 | 355.6 | 0.156 | 3.96 |
| 16 | 16.000 | 406.4 | 0.165 | 4.19 |
| 18 | 18.000 | 457.0 | 0.165 | 4.19 |
| 20 | 20.000 | 508.0 | 0.188 | 4.78 |
| 22 | 22.000 | 559.0 | 0.188 | 4.78 |
| 24 | 24.000 | 610.0 | 0.218 | 5.54 |
| 30 | 30.000 | 762.0 | 0.250 | 6.35 |
Stainless Steel Grade
Stainless steel materials have excellent properties to use in high pressure, high temperature and corrosion environments, besides below stainless steel grades, we also offer other alloy steel on request.
300 Series
Schedule 40 Sch 40S Thickness Stainless Steel Pipe Manufacturing
Stainless steel pipe can be manufactured as seamless or welded technical processes, cold finished & hot finished manufacturing methods are adopted with advanced equipment and skillful engineers, the pipe welding methods contain TIG, ERW, EFW, HFW welding, etc.
Sch5S, Sch10S, Sch40S, Sch80S Pipe Dimensions, Wall Thickness And Weights
| Nominal Pipe Size (Inches) | Outside Diameter | Schedule | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 5S | 10S | 40S | 80S | |||||||
| (Mm) | (Inches) | Wall Thickness And Weight | ||||||||
| Mm (In) | Kg/M | Mm (In) | Kg/M | Mm (In) | Kg/M | Mm (In) | Kg/M | |||
| 1/8 | 10.3 | 0.405 | – | – | 1.25 (0.049) | 0.28 | 1.73 (0.068) | 0.37 | 2.42 (0.095) | 0.47 |
| 1/4 | 13.7 | 0.540 | – | – | 1.66 (0.065) | 0.49 | 2.24 (0.088) | 0.63 | 3.03 (0.119) | 0.80 |
| 3/8 | 17.2 | 0.675 | – | – | 1.66 (0.065) | 0.63 | 2.32 (0.091) | 0.85 | 3.20 (0.126) | 1.10 |
| 1/2 | 21.3 | 0.840 | 1.65 (0.065) | 0.81 | 2.11 (0.083) | 1.00 | 2.77 (0.109) | 1.27 | 3.74 (0.147) | 1.62 |
| 3/4 | 26.7 | 1.050 | 1.65 (0.065) | 1.02 | 2.11 (0.083) | 1.28 | 2.87 (0.113) | 1.68 | 3.92 (0.154) | 2.20 |
| 1 | 33.4 | 1.315 | 1.65 (0.065) | 1.30 | 2.77 (0.109) | 2.09 | 3.38 (0.133) | 2.50 | 4.55 (0.179) | 3.24 |
| 1 1/4 | 42.2 | 1.660 | 1.65 (0.065) | 1.66 | 2.77 (0.109) | 2.69 | 3.56 (0.140) | 3.39 | 4.86 (0.191) | 4.47 |
| 1 1/2 | 48.3 | 1.900 | 1.65 (0.065) | 1.91 | 2.77 (0.109) | 3.11 | 3.69 (0.145) | 4.06 | 5.08 (0.200) | 5.41 |
| 2 | 60.3 | 2.375 | 1.65 (0.065) | 2.40 | 2.77 (0.109) | 3.93 | 3.92 (0.154) | 5.45 | 5.54 (0.218) | 7.49 |
| 2 1/2 | 73.0 | 2.875 | 2.11 (0.083) | 3.69 | 3.05 (0.120) | 5.26 | 5.16 (0.203) | 8.64 | 7.01 (0.276) | 11.4 |
| 3 | 88.9 | 3.500 | 2.11 (0.083) | 4.52 | 3.05 (0.120) | 6.46 | 5.49 (0.216) | 11.3 | 7.62 (0.300) | 15.3 |
| 3 1/2 | 101.6 | 4.000 | 2.11 (0.083) | 5.18 | 3.05 (0.120) | 7.41 | 5.74 (0.226) | 13.6 | 8.08 (0.318) | 18.6 |
| 4 | 114.3 | 4.500 | 2.11 (0.083) | 5.84 | 3.05 (0.120) | 8.37 | 6.02 (0.237) | 16.1 | 8.56 (0.337) | 22.3 |
| 5 | 141.3 | 5.563 | 2.77 (0.109) | 9.46 | 3.41 (0.134) | 11.6 | 6.56 (0.258) | 21.8 | 9.53 (0.375) | 31.0 |
| 6 | 168.3 | 6.625 | 2.77 (0.109) | 11.3 | 3.41 (0.134) | 13.9 | 7.12 (0.280) | 28.3 | 10.98 (0.432) | 42.6 |
| 8 | 219.1 | 8.625 | 2.77 (0.109) | 14.8 | 3.76 (0.148) | 20.0 | 8.18 (0.322) | 42.5 | 12.70 (0.500) | 64.6 |
| 10 | 273.1 | 10.750 | 3.41 (0.134) | 22.7 | 4.20 (0.165) | 27.8 | 9.28 (0.365) | 60.4 | 12.70 (0.500) | 81.5 |
| 12 | 323.9 | 12.750 | 3.97 (0.156) | 31.3 | 4.58 (0.180) | 36.1 | 9.53 (0.375) | 73.9 | 12.70 (0.500) | 97.4 |
Pipe Quality Control
Quality control from raw material to final products, testing and inspection comply with specification, standard testing and optional testing as follows, mill test certificate should be offered as EN10204/3.1 type.
- Flattening Test
- Mechanical Tests
- Grain Size Determinations
- Radiographic Examination
- Hydrostatic or Nondestructive Electric Test
- Intergranular Corrosion Test
- Weld Decay Tests
- Transverse or Longitudinal Tension Test
FAQ
SCH 40 is the same as STD for NPS 1⁄8 to NPS 10, inclusive, and also SCH 40S is the same thickness, the STD is the same thickness in 9.53 mm when the diameter is larger than 10″.
Schedule 40 refers to carbon steel and wrought iron pipe thickness, and Schedule 40S refers to stainless steel pipe thickness, Schedule 40 is the same as Schedule 40S in thickness for NPS from 1/8″ to 10″ in diameter.