Seamless Stainless Steel Tubes: an overview


You might be working on a fuel line or operating a subsea equipment or planning any other precision system for industrial application, whatever the field you are working for, the need of safety and quality is always there. This is the reason why it is important to make the right choice in every component you select.


Seamless stainless hydraulic and instrumentation tubes play an important role in hydraulic and instrumentation systems. These tubes are used with other components, devices or instruments to secure the safe and trouble-free operations of oil and gas plants, shipbuilding, railway, automotive, power generation and other critical industrial applications.


They are a connecting part where fluids are conveyed from one equipment to another.
Cleanliness, corrosion resistance, accurate tolerances are part of the requirements for these tubes.


Application fields are various. Just to mention the most common ones:

  • Instrumentation and control lines
  • Safety systems sampling and analyzer lines
  • Hydraulic systems, pneumatic lines
  • Process impulse lines, signal transmission lines
  • Subsea equipment, fuel and CNG lines, compressors


Description of Instrumentation tubing available in stock:

Seamless stainless steel tubes according to ASTM A269/A213/EN10216-5 TC1
  • Tolerances: EN ISO 1127 D4/T3S
  • Surface: bright annealed + polished up to OD 25mm or annealed and passivated + polished grit 180 over OD 25mm
  • Certification: PED 2014/68/EU
  • NDT: 100% Eddy Current Test, 100% P.M.I.
  • Length: 6000 mm -0/+10 mm
  • Ends: plugged with plastic caps

Steel grades
TP304/304L 1.4301/1.4307 - TP316/316L 1.4401/1.4404 – TP321/1.4541

Size range
OD from 5mm to 42mm - WT 1mm to 3mm

The available size range is referred to the mostly required sizes on the market. Other sizes could be studied for stock in case of interest of any specific customer, in case of regular business.




Article written by:


Francesca Bogani
Product Manager @Pipex Italia
fbogani@pipex.it



Giulia Ghidotti
Distribution Product Manager @Pipex Italia
gghidotti@pipex.it





For more information, details or requests don't hesitate to contact the author of this article.


Article published on 01/04/2021

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