GMM Pfaudler Limited supplies Stainless Steel Glass-Lined Equipment. GMM Pfaudler Limited is an ISO 9001:2008 company and is accredited by ASME and TUV. GMM Pfaudler Limited offers engineered equipment and systems for critical applications in the chemical and pharmaceutical industries. The Stainless Steel Glass-Lined Equipment, under the brand name Glasteel – 4000 is the high-voltage test glass that can be applied and tested to guarantee a reliable glass lining of uniform thickness and quality on stainless steel. No thin spots, no bare metal, no exposed base coat - all of which can occur with other glasses on stainless steel.