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DEFRENIT
Industrial piping for tank farms and mineral oil facilities

Industrial piping for tank farms, fuel depots and mineral oil facilities.

Filling, discharge and transfer lines that stay leak-tight and are operated safely. We build and renew piping in tank farms and fuel depots in the Basel region, in carbon steel or stainless steel, according to the operator's regulations.

Industries · Petroleum and tank farms

What tank farms get from us

01

Transfer lines between tank, loading facility, rail and ship connection.

02

Filling and discharge lines with valves, strainers and metering sections.

03

Vapour return and vent lines.

04

Fire-fighting water and foam lines as specified in the fire protection concept.

05

Walkways, platforms and pipe supports from our metalwork shop.

06

Renewal of corroded sections and adaptation to new products.

Carbon steel piping

Materials and processes

For fuels, heating oil and lubricants, carbon steel is the standard, with corrosion protection according to the operator's concept. For additives, biocomponents or corrosive admixtures we use stainless steel 1.4404. Welding is by the TIG, MAG and stick (MMA) processes, on site also in difficult welding positions. After installation we test the line as agreed and hand over the test report.

Working in Ex zones

Tank farms are Ex zones (hazardous areas). Our fitters work according to the operator's permit-to-work procedures: hot-work permit, gas-free measurement, fire watch, tools appropriate to the zone. Work is planned so that transfer operations continue as far as possible.

Step by step

How we work

  1. Step 01

    Site visit

    routing, condition, tie-in points, Ex zones.

  2. Step 02

    Quotation and design

    isometrics, material, corrosion protection, scope of testing.

  3. Step 03

    Prefabrication in Pratteln

    spools, flanged connections, pipe supports.

  4. Step 04

    Installation

    in agreed time windows, with the operator's release.

  5. Step 05

    Testing and handover

    pressure test, test report, as-built drawings on request.

FAQ

Frequently asked questions

Which material do you use for fuel lines?

Generally carbon steel with corrosion protection. For additives, biocomponents or corrosive admixtures we use stainless steel 1.4404. We agree the choice with the operator and according to the product.

How does work in an Ex zone proceed?

According to the operator's permit-to-work procedure: hot-work permit, gas-free measurement, fire watch and tools appropriate to the zone. Our fitters are familiar with these procedures.

Can transfer operations continue during the work?

Usually yes. We plan the work section by section and in agreed time windows, so that the other lines remain in operation.

Do you also build walkways and platforms?

Yes. Our metalwork shop fabricates walkways, platforms, stairs and pipe supports in galvanised steel or stainless steel, on request in the same job as the piping work.
Contact

Let's talk about your project.

Hohenrainstrasse 10b, 4133 Pratteln · Mon–Fri 07:00–12:00 and 13:00–16:00