Food Contact Materials
FDA, NSF and other standards
Food contact materials are exactly that: materials that are in contact with food or potable beverages during processing, packaging or storage. This includes component parts in machinery used for food processing, even covering such things as coffee machines and drink dispensers. Food contact materials and food contact substances (FCS) mean the same thing.
During contact with a food or beverage, molecules from a material can migrate into the food or beverage. Because of this, most countries have food safety regulatory agencies that monitor materials for food safety. In the United States, the most recognized and frequently encountered food safety agencies are the FDA and NSF International.
The Food and Drug Administration (FDA) is an agency of the United States Department of Health and Human Services. FDA responsibilities include protecting public health by assuring the safety, honesty and security of the food supply. The FDA determines the appropriate use of materials for potable beverage and foodstuff processing, handling and packaging.
The FDA does not provide government inspection or certification of materials used for food contact use. Instead, the agency sets rules and guidelines regarding appropriate material composition, properties and uses. Material meeting FDA standards is considered FDA compliant. FDA standards also cover conditions of use like temperature, food type and whether that material is suitable for either single use or repeated contact. It is the end user’s responsibility to use each material in such a way that it is conforms to FDA rules. “Food safe” and “food contact safe” are generally understood to imply FDA compliant.
The Code of Federal Regulations (CFR) is a set of general and permanent rules published by the Federal Government. The FDA uses the Title 21 section of the CFR. The surfaces and materials that come into direct contact with food and beverages are called “wetted” or “wettable” surfaces. These need to be compliant with the appropriate sections of CFR Title 21. Some sections of Title 21 most relevant to miniature fluidics and pneumatic flow control components include
● FDA 21 CFR 174, Indirect Food Additives: General
● FDA 21 CFR 177, Indirect Food Additives: Polymers
● FDA 21 CFR 178, Indirect Food Additives: Adjuvants, Production Aids and Sanitizers
● FDA 21 CFR 181, Prior-Sanctioned Food Ingredients
NSF International, formerly the National Sanitation Foundation, is an independent, non-governmental organization. NSF is usually associated with standards for direct and indirect drinking water additives but it also plays a part in food safety.
NSF certifications are frequently described as NSF/ANSI. The American National Standards Institute (ANSI) is a private non-profit organization that oversees the development of voluntary consensus standards in the United States. NSF certification requires testing to NSF standards for contact with drinking water, among others. NSF certification is provided by NSF accredited third-party certification organizations such as the Water Quality Association.
Some NSF Standards Relevant to Miniature Flow Control Component
NSF/ANSI-14, Plastics Piping System Components and Related Materials This standard applies to thermoplastic and thermoset plastic piping system. It primarily addresses physical properties of plastic components in piping and plumbing systems. Plastics piping system components and related materials complying with this standard are tested and approved by NSF for use in plumbing.
NSF/ANSI-42, Drinking Water Treatment Units - Aesthetic Effects
This standard covers point-of-use (POU) and point-of-entry (POE) systems designed to reduce specific non-health-related contaminants (chlorine, taste, odor, and particulates) that may be present in drinking water. While this standard typically applies to residential systems, the testing used makes it relevant for process filtration also. Components and related materials complying with this standard are tested and approved by NSF for use in POU and POE systems.
NSF/ANSI-51, Food Equipment Materials
This standard establishes minimum health and sanitation requirements for materials used in the making of commercial food equipment. Materials must not contaminate food nor make food equipment difficult to clean and sanitize. This standard also applies to component parts used in food equipment. Fittings and tubes complying with this standard are tested and approved by NSF for contact with potable beverages and foodstuffs.
NSF/ANSI-58, Reverse Osmosis Drinking Water Treatment Systems
This standard relates to flow control by establishing standards for material safety, component structural integrity and component strength as related to drinking water systems. Fittings and tubes complying with this standard are tested and approved by NSF for drinking water treatment systems.
NSF/ANSI-61, Drinking Water System Components - Health Effects
This standard covers pipes and pipe-related products, barrier materials, joining and sealing materials, process media, and point-of-entry systems. This standard only requires testing for materials safety, which looks for a wide variety of contaminants that may leach into the drinking water. It is most frequently associated with certification compliance regarding lead content.
Some other standards related to food contact materials
3-A Sanitary Standards
3-A was founded in the 1920's by three dairy-related associations to set sanitary standards and practices for commercial equipment and systems used to process milk and milk products as well as other perishable foods. 3-A approved materials must be resistant to steam sterilization, milk fat, acid and alkali cleaning solutions and chlorine sanitizing agents. They must also be FDA food contact material compliant.
Agriculture and Agri-Food Canada (AAFC) and Health Canada's Health Products and Food Branch (HPFB) are the Canadian government agency equivalents to the United States' USDA and FDA, respectively. The Canadian Food Inspection Agency (CFIA) enforces Canadian food safety regulations for both domestic and imported food.
The United States Department of Agriculture (USDA) regulates manufacturing, packaging and handling practices in the agricultural food industry, particularly meat, poultry and egg products. USDA compliant products are documented as to their compliance with FDA food contact material standards by a written letter of guaranty from the manufacturer.
The international symbol for food safe materials is a stylized wine glass and fork. This indicates that the material used in the product is safe for food contact. This food safe indication is applicable to any product intended for food contact whether it is made of metals, ceramics, paper and paperboard, or plastics. The glass-and-fork symbol is mandatory for all food contact products sold in Europe except for things like eating utensils and glassware.