components in your success


Stainless steels offer specific corrosion resistance and mechanical properties and formability. With OSTP’s long experience and production innovative technology, we produce world-class process pipes, specialty tubes, butt weld fittings and more in this remarkable material. 

Whatever your application, our reliable production, stocks and support services provide worldwide supply capabilities ensure fast delivery of stainless steel products to match your need.

You’ll find pressure-certified components to meet safety and design regulations, available in dimensions and grades that let you balance performance, weight and cost value for money.

Stainless tubular products

tubes & pipes

  • Stainless process pipes
  • Stainless circular hollow sections
  • Product standards

Butt weld fittings

  • Elbows
  • Tees
  • Reducers 
  • Collars
  • End Caps

Process equipment

  • Tubular heat exchangers
  • Pressure vessels, reactors and columns
  • Site-built tanks
  • Conical refiners and deflakers
  • Specialty products

norsok approvals

OSTP is listed on Equinors official list of  Approved Suppliers as a producer for longitudinal welded pipes and welded elbows according to NORSOK M650

EN 1.4547 / UNS S31254

Longitudinally welded pipes acc to ASTM A358/A358M-19 cl 3  OD 6″ – 14″ WT 2,77- 5,97mm

Welded Elbow A403 WP-WX 6″ – 28″ OD < 18,75mm

EN 1.4462 / UNS S31803 / S32205

Longitudinally welded pipes acc to ASTM A928/A928M-14 cl 3  OD 6″ – 14″ WT 2,77- 4,78mm

Welded Elbow A815 WP-WX 6″ – 28″ OD < 15,09mm

EN 1.4410 / UNS S32750

Welded Elbow A815 WP-WX 6″ – 28″ OD < 15,09mm


We deliver pipes and tubes from stock and straight from our production, where we manufacture them from strip or plate in a wide range of grades, thicknesses and surface finishes. 


At OSTP, we maintain full control over the manufacture and inspection of our welded stainless steel products. The proof is in our satisfied customers and major quality certifications

Quality every step of the way