TYPICAL STAINLESS STEEL PIPING

 

Stainless Steel Pipe Size & Type

Pipe diameter from 1“ to 12“ (25 to 305 mm)

Wall thickness from Sch.5 to Sch.80 (1,65 to 12,7 mm)

Typical alloys are austenite stainless steel as AISI 304 or 316 type

Also qualified for a ferrite or duplex steels and nickel alloys and theirs combinations

 

Main manufacturing standards

For non-pressure piping

ISO 15614-1

ASME IX code

AWS D1.6

 

Specially for pressure piping's

PED 97/23/CE directive

ASME B31.1 code

ASME B31.3 code

 

Man Power

48x certified TIG welders

17x certified VT/DPT inspectors

5x certified UT/X-RAY/LT inspectors

 

MANUFACTURING PROCESS

All piping's are welded by TIG welding process

Small bore piping up to 2“ (50 mm) by orbital head

Bigger sizes by manual welding

 

All external surfaces and welds can be cleaned by a wet passivation at nitric acid, we can offer:

Local weld paste passivation or

Complete surface passivation applied by spraying

 

The internal corrosion resistance can be suited by choice of purging gas type, we are qualified for following types:

  • 100 % Argon
  • 98 % Argon + 2 % Hydrogen
  • 10 % Nitrogen + 90 % Hydrogen

 

INSPECTION PROCESS

All piping is visually inspected:

  • external surface and welding (e.g. weld size, surface smoothness and lack of contamination)
  • Internal root quality by video-scope or mirrors (e.g. penetration, oxide coloring, residual dust)

Customers commonly order a dye penetration testing on butt welds

For demanding applications we can offer extended testing by:

  • Ultrasonic testing, for thick wall piping's
  • X-Ray testing, for thin wall piping's

 

LEAK TEST PROCESSING PROCESS

Based on customer or standards (PED/ASME) requirements

we perform the following leak tests, typically up to 150bar:

  • Smoke testing
  • Babble testing
  • Pneumatic pressure testing - by compressed air
  • Hydrostatic pressure testing – by pressurized water

 

PACKING PROCESS

We take special care with part packing and transport boxes using our traceability system before we deliver to customer sites.

 

SUB SEA PROJECTS

 

Piping System Design - BTS

Clean Room Area – 3200 sqm

High Pressure Testing – up to 800 bar

All Fabrication and Testing Equipment in house