With WGalweld, Wuppermann is the only manufacturer in Europe to offer a galvanized internal weld and thus the solution for the highest corrosion protection of steel tubes. The new generation of galvanized tubes is the result of an elaborate development process. The thermally applied metallic coating adheres excellently, even in the area of the weld seam, both externally and internally.

What are the advantages of the WGalweld process?

The outstanding quality feature of a galvanized steel tube produced by this process is the external and internal weld seam, which is protected against corrosion. The starting material for this is galvanized strip steel from Wuppermann with a metallic coating of zinc or zinc-magnesium in economical layer thicknesses of the customer's choice. In a spectrum from 7 to 80 µm, there is also the option of a different layer on the inside and outside in a ratio of 1:2 or vice versa - so-called differential galvanizing. The smooth and homogeneous surface of the tube shell is the perfect basis for a subsequent organic outer coating of a structural tube and a quality feature for low hydraulic pressure loss inside a media-carrying tube.

What final products can Wuppermann WGalweld tubes be used as?

Various fields of application require steel tubes with particularly high corrosion resistance. WGalweld pipes are optimally suited for extreme stress under particularly stressed environmental conditions.
All-round galvanized tubes from Wuppermann are used, for example, in traffic engineering as sign posts for traffic signs or as sprinkler tubes in fire protection systems. But there are also applications for this in other industries, especially those with the highest requirements for corrosion protection.

Details and quality-relevant key data

Round tube Ø 33 - 115 mm
Rectangular tube 10 x 40 - 40 x 140 mm
Square tube 25 x 25 - 90 x 90 mm
Tube lengths 50 - 15.000 mm
Wall thickness 1,00 - 4,00 mm
Imperial formats 1" 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 tube geometry
Welding processing sequence freely selectable
Pressure test to maximum 150 bar
Own roll groove facility

Technical product advice


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