How to Select Steel Pipes for Pressure Vessel and Special Applications?
Selecting the right steel pipe for pressure vessels and special industrial applications is critical for ensuring safety, reliability, and long-term operational performance. Industries such as oil & gas, petrochemical, power generation, LNG, chemical processing, and offshore engineering often operate under extreme pressure, temperature, and corrosive conditions. Therefore, choosing the appropriate pipe material, manufacturing process, and international standard is essential.
Key
selection factors
Working
pressure
- Low / medium pressure: Carbon steel seamless pipes (ASTM
A106 Gr.B, EN P235GH, JIS STB410)
- High pressure: Alloy steel pipes (ASTM A335
P22/P91, EN 16Mo3)
- Ultra-high pressure: Forged thick-wall seamless pipes
with strict non-destructive testing
Working
temperature
- Normal temperature: Common carbon steel grades
- High temperature (boiler, power
plant): Cr-Mo
alloy steel — A335 P11, P22, P91
- Low / cryogenic temperature (LNG,
cold storage):
Low-temperature impact steel — ASTM A333 Gr.6, 9% nickel steel
Medium
& corrosion environment
- Water, steam, air: Ordinary carbon
steel
- Acid, alkali, chemical fluid: 304 /
316L stainless steel
- Sour service (H₂S oil & gas): Anti-sour alloy
steel and specialized seamless pipes
- Marine & salt corrosion: Duplex
stainless steel
Manufacturing
type: seamless vs welded
- Seamless steel pipe: First choice for pressure
vessels, high temperature, high pressure, special applications — no weld
seam, uniform structure, higher safety
- Welded steel pipe: Only allowed for low-pressure,
non-critical structural use, not recommended for main pressure vessel
piping
Compliance
with international
standards
Must
follow recognized industrial standards for pressure vessel use:
- US: ASTM A106, A335, A333, A312, A213,
B444, B423, B622
- EN: EN 10216, P235GH, P265GH, 16Mo3
- JIS: JIS G3461, G3462, STBA / STB
series
Grade
selection by application scenario
Pressure
vessel general use
- Carbon steel: A106 Gr.B, P235GH, STB410
- Medium strength: A53 Gr.B, P265GH
High
temperature & boiler pressure vessels
- Alloy grades: A335 P11, P22, P91; 10CrMo9-10;
STBA22 / STBA24
Cryogenic
& ING special applications
- Low temp grade: A333 Gr.6, A333 Gr.8
Corrosive
& chemical special applications
- Stainless: TP304, TP316L; 1.4301, 1.4404;
SUS304, SUS316L
- Nickel alloy: Inconel 625, Incoloy 825, Hastelloy
Dimensional
& technical requirements
Wall
thickness: calculated according to design pressure and temperature
Dimensional
tolerance: strict precision for vessel assembly
NDT
inspection: UT, RT, MT required for pressure vessel pipes
Heat
treatment: normalizing, quenching and tempering for high-load alloy pipes, annealing,
solution
Conclusion
Steel
pipe selection for pressure vessels and special applications must
comprehensively consider working conditions, material grades, manufacturing
types, and international standards. Reasonable selection ensures safety, long
service life, and stable operation of pressure vessel equipment and special
industrial systems.
Final
Selection Principles Summary
- Confirm pressure + temperature +
medium first
- Prioritize seamless steel pipes
for pressure vessel and special service
- Choose material grade matching ASTM
/ EN / JIS standards
- Match wall thickness and technical
inspection to design requirements
- Avoid ordinary welded pipes for
high-pressure and critical special applications
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