Mito Metals Corporation
Stainless
Steel
Seamless
Pipes
ステンレス鋼シームレスパイプ
Austenitic stainless steel seamless pipes for corrosion-critical service — pharmaceutical, petrochemical, marine, and nuclear applications.
1/2"–24"NPS
6Grades
A312ASTM
EN 10204Certs
Scroll
Overview
Engineered for
Corrosion-Critical Service
Corrosion-Critical Service
Hot-finished and cold-drawn from solid austenitic billets — no weld seam — for superior intergranular corrosion resistance and pressure integrity.
01
Zero Weld Seam
No heat-affected zone — uniform microstructure throughout the wall.
02
Austenitic Grades
304, 304L, 316, 316L, 321, 347 — full chromium-nickel matrix.
03
1/2" to 24" NPS
Complete dimensional range per ASTM A312 and A213.
04
Full Traceability
EN 10204 3.1/3.2 — heat-stamped, color-coded, tagged.
Diameter Range
From 1/2" to 24" NPS
Wall Thickness
Available Schedules
5S
Light
10S
Light
SCH 10
Standard
SCH 20
Standard
SCH 40
Standard
40S
Standard
STD
Standard
SCH 60
Heavy
SCH 80
X-Strong
80S
X-Strong
XS
X-Strong
SCH 120
Heavy Wall
SCH 160
X-Heavy
XXS
Double Xtra
Material Grades
Austenitic Stainless Grades
304
TP30418Cr–8Ni
Cr18–20%
Ni8–10.5%
Yield30 ksi
Tensile75 ksi
304L
TP304L18Cr–8Ni Low C
Cr18–20%
Ni8–12%
C max0.035%
Tensile70 ksi
316
TP31616Cr–12Ni–2Mo
Cr16–18%
Mo2–3%
Yield30 ksi
Tensile75 ksi
316L
TP316L16Cr–12Ni–2Mo Low C
Cr16–18%
Mo2–3%
C max0.035%
Tensile70 ksi
321
TP32118Cr–10Ni–Ti
Cr17–19%
Ti5×C min
Yield30 ksi
Temp1500°F
347
TP34718Cr–11Ni–Nb
Cr17–19%
Nb10×C min
Yield30 ksi
Temp1500°F
Dimensional Data
Pipe Specifications
ASTM A312 / A213 — Wall Thickness (mm)
| NPS | DN | OD mm | 5S | 10S | SCH 40S | SCH 80S | SCH 160 |
|---|---|---|---|---|---|---|---|
| 1/2" | 15 | 21.3 | 1.65 | 2.11 | 2.77 | 3.73 | — |
| 3/4" | 20 | 26.7 | 1.65 | 2.11 | 2.87 | 3.91 | — |
| 1" | 25 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 | — |
| 2" | 50 | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 | — |
| 3" | 80 | 88.9 | 1.65 | 2.77 | 5.49 | 7.62 | — |
| 4" | 100 | 114.3 | 2.11 | 3.05 | 6.02 | 8.56 | 13.49 |
| 5" | 125 | 141.3 | 2.77 | 3.40 | 6.55 | 9.53 | 15.88 |
| 6" | 150 | 168.3 | 2.77 | 3.40 | 7.11 | 10.97 | 18.26 |
| 8" | 200 | 219.1 | 2.77 | 3.76 | 8.18 | 12.70 | 23.01 |
| 10" | 250 | 273.1 | 3.40 | 4.19 | 9.27 | 15.09 | 28.58 |
| 12" | 300 | 323.9 | 3.96 | 4.57 | 10.31 | 17.48 | 33.32 |
| 14" | 350 | 355.6 | 3.96 | 4.78 | 11.13 | 19.05 | 35.71 |
| 16" | 400 | 406.4 | 4.19 | 4.78 | 12.70 | 21.44 | 40.49 |
| 18" | 450 | 457.2 | 4.19 | 4.78 | 14.27 | 23.83 | 45.24 |
| 20" | 500 | 508.0 | 4.78 | 5.54 | 15.09 | 26.19 | 50.01 |
| 22" | 550 | 558.8 | 4.78 | 5.54 | 15.88 | 28.58 | 53.98 |
| 24" | 600 | 609.6 | 5.54 | 6.35 | 17.48 | 30.96 | 59.54 |
Delivery
End Finish & Surface
End Finish
Plain EndSquare cut
Beveled End30° ± 5°
ThreadedNPT / BSP
GroovedRoll / cut
Surface Finish
Pickled & PassivatedASTM A380
Bright AnnealedMirror / BA
ElectropolishedRa ≤ 0.8 µm
Mill Finish2B / 2D