Larpen Metallurgical Service

North American Leader and World-Wide Supplier of Graphite and Carbon Additives Since 1962

Quality Assurance

Quality AssuranceJA2_0056-a

The GRAPH-HEX brand is distinguished through the industry as quality, consistency, and reliability. In the early 2000’s, Larpen became certified as an ISO 9001-2000 supplier.

Our ISO 9001:2015 certification ensures that we are continuing to improve our products and services to meet customer needs. As our Quality Policy states, we will meet customers’ requirements by providing:

  1. A consistent quality product
  2. On-time delivery
  3. Competitive pricing
  4. Continuous improvement of the quality system

ISO Certificate

Quality Assurance


Quality standards include the following:

  • Carbon
  • Sulfur
  • Ash
  • Volatiles
  • Nitrogen
  • Moisture
  • Grain sizing
  • Date coding
  • Bag weight


For inquiries of SDS for our products please contact Larpen directly.