The all-round corrosion protection for tubes

With WGalweld, Wuppermann has the solution for the highest corrosion protection of steel tubes. The new generation of galvanized tubes is the result of a complex development process. The thermally applied metallic coating adheres excellently. The uniqueness of WGalweld tubes lies in the fact that the zinc and zinc-magnesium layer also adheres in the area of the weld seam, both internally and externally.

What are the advantages of the WGalweld process?

The main advantage of Wuppermann's WGalweld process is the corrosion-resistant weld seam in- and outside. With tubes, made of high-quality galvanized strip, input material from our own production, we can guarantee optimum zinc adhesion, which differs greatly from the zinc adhesion of batch-galvanized tubes.

We offer a smooth, homogeneous surface quality of the tube shell inside and outside: On the outside it serves as a perfect basis for a subsequent organic coating and on the inside as a quality feature for only a low hydraulic pressure loss.

Wuppermann's WGalweld tubes also provide economical corrosion protection. Zinc and zinc-magnesium coatings can be adapted to the customer's end product and there is the option of differential galvanizing. In differential galvanizing, there is always a ratio of 1:2. For example, this can manifest itself in the tube shell being galvanized with a coating of 70 µm on the outside and 35 µm on the inside.

What final products can Wuppermann WGalweld tubes be used as?

In many areas of application, steel tubes with particularly high corrosion resistance are required. WGalweld tubes are ideally suited for extreme stress in areas of application at risk of corrosion.

All-round galvanized tubes from Wuppermann are used primarily in traffic engineering for suspensions of traffic signs and in rail traffic in the area of overhead lines. Both applications require corrosion protection for the highest demands, which Wuppermann meets with its WGalweld tubes.

WGalweld tubes can also be used as sprinkler tubes. Please see the product information for our sprinkler pipes.


Details and quality-relevant key data can be found in the fold-out table:


Round tubeØ 30 - 115 mm
Rectangular tube10 x 40 - 40 x 140 mm
Square tube25 x 25 - 90 x 90 mm
Tube lengths2.500 - 15.000 mm
Wall thickness1,00 - 4,00 mm
Strip thickness tolerancesto +/- 0,03 mm
Imperial formats1" to 4"

Tube & profile standards/Steel grades

EN 39 / S235GT
EN 10217-1 /  P195TR1 – P265TR1
EN 10219-1 /  S235JRH – S355J2H
EN 10305-3 & EN 10305-5 / E195+CR1 – E355+CR1
EN 10305-3 & EN 10305-5 / E220+CR2 – E420+CR2
EN 10162 / S250GD – S350GD
ASTM A795M / Type E, Grade A

Product specifications

Zinc coatings per site: 7 – 80 μm (50 – 560 g/m2)
Differential galvanization: in a ratio of up to 2:1
Coatings: Z (pure zinc), ZM (zinc-magnesium)
Coating finish: M (minimized spangle)
Types of surface: A (normal), B/C (rerolled)

Quality data

Certified according to ISO 9001:2008 and ÖNORM EN ISO 3834-3
CE conformity according to EN 10219-1, BPV 305/2011/EU (Nr. 0780-CPR-122060)
Certified according to DGRL 97/23/EG und 97/23/EC (Nr. 01 202 973/Q-14 9999)
Acceptance test certificate according to EN 10204 3.1
Certified welder according to ÖNORM EN ISO 14732:2013
Certified NTD staff according to ÖNORM EN ISO 9712
Primary material from own strip galvanizing according to EN 10346
Constant inline-controlling of weld quality
Inline edy current testing
Constant inline measuring of pipe geometry
Welding processing sequence freely selectable
Pressure test to maximum 150 bar
Own roll groove facility