Pipe weld purging system
for the highest demands
Field-proven forming technology, supported by years of experience, for perfect weld seams.
Our pipe weld purging system at a glance
pipe weld purging - creating an environment that is as oxygen-free as possible in the area of the weld seam to ensure the best possible tarnish-free condition to protect the weld seam root from OXYDATION - is the short description of FORMING
Service for the practice
Our practical expertise is the basis for high-quality forming and welding technology for all welding methods and processes as well as all welding accessories.
We bring technological progress and cost-effectiveness in the field of WELDING and FORMING to your company.
The individual and competent advice for new purchases, based on close co-operation with internationally active manufacturers, guarantees an economical and innovative solution for your area of application.
Holzer ASS® knows the day-to-day work of its customers and therefore offers various service concepts to ensure that everything runs smoothly for you.
Advantages ASS®-Prime
Shock-forming is a welding preparation method in which oxygen and moisture are displaced by increased gas flow. The ASS®-Prime forming system was specially developed for this technology to ensure an efficient and smooth gas supply and to guarantee welding quality.
The displacement of oxygen and moisture prevents tarnishing and discolouration, resulting in a high-quality weld seam at the root.
The impact moulding method allows significantly faster preparation of the moulding chamber compared to traditional methods.
The ASS®-Prime forming system is developed, designed and manufactured entirely in-house at Holzer. The design, production and provision of spare parts are all carried out in-house, which ensures a high level of quality assurance and rapid availability.
ASS®-Prime
Maximum freedom from annealing colours in pipes
The inflatable forming system ASS®-Prime from Holzer ASS® is a forming system with a modular design that is suitable for a wide range of applications. Through years of experience with the forming systems available on the market, the ASS® -Prime forming system has been further developed to meet the requirements for the best possible absence of tarnish.

Pipe weld purging technology
that has grown from practice and experience
It is not only the human condition that has evolved to this day through challenges, experiences and setbacks. Further development in moulding technology has also succeeded on the same basis. Today, we also consider the careful use of resources and sustainability. The influence of experienced, skilled and knowledgeable users must not be forgotten. All of this has been used for innovative moulding technology such as the ASS inflatable moulding system®-Prime from Holzer ASS®.
Influencing factors for tarnish colours
- Residual oxygen content
- Moisture
- Purity of the inert gas
- Surface finish
Why mould?
Discover why forming is important in practice.
Discover everything you need to know about forming during welding with us. Find out how quality management and documentation, the right parameters and gases as well as safety aspects optimise the welding process. We will also give you helpful tips on standards, materials and applications for perfect welding results.
Welding technology
Are you interested in welding technology?
Thanks to our experience and interest in welding technology, our trained employees will be happy to assist you with your welding tasks. Holzer ASS® works together with well-known manufacturers of welding systems, plasma systems and the like.