Welding

Custom Welded Elbow for Fireline Pipe Installation

Custom TIG-welded pipe elbow with stainless steel flange for fire protection piping system. Full weld quality control including penetrant testing.

Technical Specifications

Material: AISI 316L stainless steel
Welding method: TIG (process 141)
Nominal diameter: DN80
Working pressure: 16 bar
Testing: PT + hydrostatic test
Flange tolerance: IT7
Standard: EN ISO 15614
Lead time: 5 business days

Challenge

A client in the marine industry required a non-standard pipe elbow for a fireline pipe system. The component had to meet stringent leak-tightness and corrosion resistance requirements in a marine environment. Standard catalog elbows didn't fit the existing installation due to an unusual angle and connection diameter.

TMT Solution

We designed and fabricated the elbow using TIG welding (process 141) from AISI 316L stainless steel. The custom flange was CNC-turned with IT7 tolerance. The weld underwent penetrant testing (PT) and hydrostatic pressure testing. The entire process was completed in accordance with EN ISO 15614 at our facility in Rybnik.

Result

The finished elbow passed all leak-tightness tests and was installed in the fireline pipe system. The client confirmed full compliance with classification society requirements. Lead time: 5 business days from receipt of technical documentation.

Related service: MIG/MAG/TIG Welding →

Frequently Asked Questions

What welding methods do you use for stainless steel?

For stainless steel, we primarily use the TIG method (process 141), which provides the highest weld quality and minimal heat-affected zone. For thicker materials, we use a combination of TIG (root pass) + MIG/MAG (fill passes).

Do you manufacture components for marine and offshore installations?

Yes, we produce components for the marine and offshore industries, including elbows, flanges, and piping from stainless and acid-resistant steel. Our welds undergo non-destructive testing (VT, PT) as required by marine classification societies.

What is the minimum lead time for welded pipe components?

Typical lead time is 3-7 business days depending on complexity. For urgent orders, we offer an express mode with 48-hour delivery. Every component undergoes quality inspection before shipment.

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