Meta Description: FDA 21 CFR 175.300 plus NSF/ANSI 61, EU 1935/2004, LFGB, WRAS; inert, non-leaching GFS lining; specify lining grade and get written compliance – and know where GFS fits.

Updated: September 2026 | Author: Center Enamel Technical Content Team | Reviewed by the Engineering Department

‘FDA-certified GFS tank’ bundles two ideas buyers should keep separate: a food-contact regulation (FDA 21 CFR 175.300) and a tank material (Glass-Fused-to-Steel). GFS is genuinely well suited to food and pharma storage because its glass lining is inert and non-leaching – but compliance is something you specify and document, not something a panel wears like a badge. This article explains the boundaries.

Key Takeaway

An FDA-compliant GFS tank uses a glass lining that meets FDA 21 CFR 175.300 (and, for water/export, NSF/ANSI 61, EU 1935/2004, LFGB and WRAS) – an inert, non-leaching surface that does not impart taste or contaminants. The key is to specify the lining grade for your exact application and obtain written compliance; GFS fits food and pharma storage where the stored product is compatible with a vitreous-enamel interior, not every food-contact duty.

What FDA 21 CFR 175.300 Actually Covers

21 CFR 175.300 is the U.S. regulation for resinous and polymeric coatings on food-contact surfaces. For GFS, the claim is that the fired glass lining meets the extractives and use conditions in that regulation. It is a material compliance, documented per lining formulation and intended use – not a one-time certificate that travels with every tank regardless of what it holds.

FDA 21 CFR 175.300 = coatings on food-contact surfaces.

Compliance is per lining formulation and use.

Documented, not a generic badge.

The Inert, Non-Leaching Advantage

The reason GFS suits food and pharma is the glass itself: an inorganic, vitreous surface fused at 820-930C that does not soften, leach or impart taste under normal storage. That inertness, plus a smooth cleanable face, is why GFS appears in potable-water and process-liquid duty. For international food/pharma work the same lining is often documented against NSF/ANSI 61, EU 1935/2004, LFGB and WRAS depending on market.

Inorganic glass: no leach, no taste.

Smooth, cleanable hygienic face.

NSF/ANSI 61, EU 1935/2004, LFGB, WRAS by market.

Where GFS Fits – and Where It Does Not

GFS is strong for potable water, many food/beverage process liquids and pharmaceutical-grade water storage where a vitreous enamel interior is compatible. It is not automatically right for every food-contact duty – highly acidic or fluoride-bearing streams can attack glass, and some products need stainless or a specific polymer lining. The honest step is to state the product and get the lining graded and documented for it.

Fits: potable water, food/beverage process, pharma water.

Caution: strong acid / fluoride can attack glass.

Match lining grade to the exact product.

Compliance Standards by Market

Document the lining against the market you sell into:

Market |
Standard to document |

USA |
FDA 21 CFR 175.300 |

Global potable |
NSF/ANSI 61 |

EU |
EU 1935/2004 |

Germany |
LFGB |

UK |
WRAS |

Project Reference

Food and beverage references show the hygiene class in service: the Coca-Cola plant wastewater projects in Malaysia (2016) and Saudi Arabia (2017, Dammam and Riyadh) and the YiLi dairy wastewater project in Gansu, China (2020) demonstrate tanks supplied into food/beverage industry environments where hygiene and compliance matter.

Coca-Cola Malaysia 2016; Coca-Cola Saudi 2017 (Dammam/Riyadh).

YiLi dairy Gansu 2020 – food/beverage industry.

Company Expertise

Center Enamel supplies GFS tanks with NSF/ANSI 61-capable linings and food/beverage industry references, and can document compliance (FDA 21 CFR 175.300, EU 1935/2004, LFGB, WRAS as applicable) for the specific lining and use you specify.

Frequently Asked Questions

Does GFS meet FDA for food contact?

A GFS lining can be documented to FDA 21 CFR 175.300 where the formulation and use condition qualify; obtain the written compliance for your product.

Is GFS also NSF/ANSI 61 compliant?

NSF/ANSI 61 is the potable-water contact standard; GFS linings are commonly documented to it, and to EU 1935/2004, LFGB and WRAS by market.

Is GFS safe for all food and pharma liquids?

No – strong acids and fluorides can attack the glass. State the product and have the lining graded and documented for that use.

What makes GFS hygienic?

An inert, non-leaching, smooth vitreous surface that does not impart taste or contaminants and is easy to clean.

How do I get compliance documented?

Specify the lining grade and intended product, then request the extractives/use-condition documentation per regulation.

Which industries use GFS today?

Potable water, food/beverage process liquids, pharmaceutical-grade water and general industrial storage.

Conclusion

An FDA-compliant GFS tank is an inert, non-leaching glass lining documented for your specific product – not a generic certificate. Specify the lining grade, get the written compliance (FDA, NSF/ANSI 61, EU 1935/2004, LFGB, WRAS as needed), and keep clear on where vitreous enamel is and is not the right barrier.

Suggested CTA: Tell us your stored product and market and we will specify and document a GFS lining grade for FDA/NSF/EU compliance – with the reference list to match.