Bundesverband Flachglas

BF Webinars Spring/Summer 2018

After a longer break, the German Federal Flat Glass Association (Bundesverband Flachglas) offers again the webinar program of the technical training series (all webinars in German language). Basically, those webinars are open for everybody.  Especially for newcomers in the glass industry, they are an excellent opportunity to quickly get an overview of the required knowhow. Primarily, the webinars of the fall/winter season focus on topics for beginners, whereas the  spring/summer will provide webinars for deeper knowledge.

My contribution as a speaker for the spring/summer 2018 program will be:

  • 28.2.2018 at 10am Abstandhalter/Warme Kante II (insulating glass spacers/warm edge part 2)
  • 8.3.2018 at 10am  Glasbruch Teil II (glass breakage part 2)
  • 15.3.2018 at 2pm Sprossen (glazing bars)
  • 26.4.2018 at 10am Kondensation bei Isolierglas (condensation on insulating glass)

You can find more information on the topics of my webinars as well as the full program (in German language)  here.

The Online application on the BF websites is here.

On 04. February 2018|By |Dates|0 Comments

News from the “Warm Edge” Working Party

The BF data sheets – which list representative Psi-values for windows and for façade profiles – published by the Bundesverband Flachglas e.V. (“BF” = German Federal Flat Glass Association) are often used to determine UW– and UCW-values. This comparatively simple (but standard-conforming) method is well known in the market – far beyond the borders of Germany. A new project of the BF “Warm Edge” Working Party now aims to permanently ensure trustworthiness and reliability of the declared values. 

The representative Psi-values of the BF data sheets for windows and for façade profiles are calculated according to EN 10077-2 using the so-called equivalent thermal conductivity λeq,2B, (which is determined by measurement). The basis for this approach, as well as for the validity and application of these representative Psi-values are the three ift guidelines about thermally improved spacers, namely WA-08, WA-17 and WA-22. To declare the value of λeq,2B, three pairs of test specimen made from desiccant-filled and butyl-equipped spacers are measured, followed by a statistical evaluation. The value is shown on the BF data sheets on the bottom under ‘Two Box model Characteristic values’ in ‘Box 2’.

Picture: In the future, the value λeq,2B, declared on the BF data sheets shall be rechecked on a regular basis. The value is not suitable for a comparison of individual thermal performances of warm edge systems. For that purpose, only the indicative Psi-values shall be used, because they also include the influence of the spacer height h2.

Apart from a few exceptions, the sole difference in calculating warm edge systems are the input data λeq,2B and the height h2 of the spacer box 2. Therefore, the value λeq,2B is particularly important. It determines the Psi-values which are the most important performance factors of spacer manufacturers in their daily competition.

Consequently, during their last meeting on February 9th, 2017, the members of the BF “Warm Edge” Working Party have agreed a voluntary commitment to scrutinize the equivalent thermal conductivity values λeq,2B every two years. This shall allow the detection of any deviations compared with the original measurements, and as an additional benefit will provide the security that the values declared on the BF data sheets are still correct. The costs of the procedure will be borne by the respective spacer manufacturers.

The measurements shall exclusively be made by ift Rosenheim. It is worth emphasizing that the samples for these check measurements shall be collected from the spacer processing companies in the market, and not supplied by the spacer manufacturers themselves.

From 1st of January 2017, the RAL Gütegemeinschaft Mehrscheiben-Isolierglas e. V. (“GMI” = German Multi-Pane Insulating Glass Quality Association) has already implemented an external monitoring of the insulating glass components spacer, sealants and desiccant. It aspires to later include the control of λeq,2B, planned to be done every two years, into the ‘RAL-GMI Quality monitoring and testing standards for multi-pane insulating glass’.

As of the first re-measurement, the currently valid BF data sheets, available online on the BF websites, will be equipped with an expiration date of validity. The first check and new dating of the data sheets shall take place in 2018.

The „Warm Edge“ Working Group

The ‘Warm Edge’ working group is a subcommittee of the Technical Committee of Bundesverband Flachglas. The participants in the working group are members and sponsoring members of BF. Scientific support for the working group is provided by Prof. Dr. Franz Feldmeier, Rosenheim University of Applied Sciences and by Mr. Norbert Sack, ift Rosenheim.

This is a press release of BF Bundesverband Flachglas and ift Rosenheim of March 2017

 

 

BF Bulletin 004 – typo gremlins got into the works

Unfortunately, the typo gremlins got into the last version of the BF Bulletin 004 “Guide to ‘Warm Edge’ for windows and facades”, and that of all things in the formulas for the calculation of Uw and Ucw. Immediately upon discovery the typos were corrected. As of now, the latest version (Modification index 4, March 2017) is available for free download on the BF websites. Or you can directly get to the pdf-files of the Bulletin in German language here, to the English version here, and to the French please click here.

BF-Bulletin 004 ‘Guide to warm edge’ now available in English and French

The BF-Bulletin 004 ‘Guide to warm edge for windows and facades’ is a good introduction to the topic of warm edge. It is a manual for the often used BF-data sheets with representative Psi-values for windows and for facade profiles and explains the boundary conditions for the use of the BF-data sheets according to ift-guideline WA-08 (windows) and WA-22 (facades).

By the request of many, the bulletin was translated into English and French language.

You can find both versions on the literature page of my website, or you can directly download the English paper here and the French one here.

On 19. September 2016|By |Miscellaneous|0 Comments

BF Technical Webinars Autumn/Winter 2016

With some delay, I would like to draw attention to the next events of the training series BF Technology Webinars, offered by the BF Bundesverband Flachglas (German Federal Flat Glass Association). Basically, those webinars are open for everybody (but they are all in German language). Primarily, the webinars of this season focus on topics for beginners, whereas the next term in spring will provide webinars for deeper knowledge.

My contribution this time will be the webinar ‘Glasbruch – Teil I’ (Glass breakage – part 1), on November 29th, 2016. The date for my webinar about warm edge part 1 is already over, but in springtime 2017, more webinars will follow.

You can find the full webinar program of the present term including a description of their contents and the speakers and the online-application on the BF-websites here.

On 19. September 2016|By |Dates|0 Comments

BF Technical Webinars Spring/Summer 2016

The webinars offered by the BF in spring/summer will take up and continue the themes that were offered during the last semester (All webinars will be held in German language).

My contribution this time will be the following four webinars:

Wednesday, 20.1.2016 – Abstandhalter / Warme Kante – Teil 2 (Spacers / Warm edge – part 2)
Thursday, 3.3.2016 – Glasbruch – Teil II (Glass breakage – part 2)
Wednesday, 13.4.2016 – Sprossen (Glazing bars)
Thursday, 2.6.2016 – Kondensation bei Isolierglas (Condensation on insulating glass)

The full program including possibility for registration can be found [here] on the BF websites.

On 17. January 2016|By |Dates|0 Comments

BF Webinars Glass breakage – remaining spots available

On Thursday, April 24th, 2014, the BF (German Glass Association “Bundesverband Flachglas” will again present my one-hour webinar “Glasbruch – Grundlagen” (Breakage of glass – basics, the webinar will be in German language). I will explain the basics of material science and the properties of glass. A short look into linear-elastic fracture mechanics will illustrate why and how glass breaks and how to predict that.

The second part “Glasbruch – Vertiefung” (Breakage of glass – advanced training, in German language) on Tuesday, May 13th, 2014 will broaden the matter and inform about the different ways to break of different glass types. I will talk about thermally and mechanically induced glass breakage as well as about their possible causes.

Are you interested?
Then click here and register on the BF website (in German language).

On 14. April 2014|By |Dates|0 Comments