In industries where electrical hazards like arc flashes pose a significant risk, ensuring the safety of workers is paramount. This is where ASTM F1891 comes into play. As the standard specification for Arc and Flame Resistant Rainwear, ASTM F1891 sets the benchmark for protective clothing in environments with potential electrical hazards. In this post, we’ll dig into what ASTM F1891 entails and why it’s crucial for your safety.

What is ASTM F1891?

ASTM F1891 is a comprehensive standard that outlines the performance requirements and testing methods for flame-resistant rainwear designed to protect against electrical arc hazards. This specification is vital in electrical utilities, electric maintenance, and oil & gas industries, where workers are exposed to high-voltage electrical equipment and the risk of arc flash incidents.

Key Features of ASTM F1891:

Material Performance Requirements:

The standard specifies the type of fabric that must be used in FR rainwear. The fabric should withstand a certain level of thermal exposure, ensuring it doesn’t melt, ignite, or break open under extreme conditions, thus providing a barrier against heat and flame.

Arc Rating Standards:

ASTM F1891 requires that the fabric used in FR rainwear has a minimum arc rating. The arc rating measures the material’s ability to protect against electrical arc flash hazards. This rating is crucial in helping employers choose the right level of protection for their workforce.

Testing Procedures:

The standard outlines specific testing methods to evaluate the rainwear’s performance. These tests simulate the conditions of an electrical arc flash, ensuring the garment’s material can withstand such extreme conditions without compromising the wearer’s safety.

Labeling Requirements:

Proper labeling is mandated under ASTM F1891. This ensures that each piece of FR rainwear provides clear information about its level of protection, helping users make informed decisions about their safety gear.


Compliance with ASTM F1891 often involves certification from third parties. This certification process ensures that the FR rainwear meets all the requirements outlined in the standard, offering an additional layer of assurance about the product’s quality and safety.

Why is ASTM F1891 Important?

Compliance with ASTM F1891 is not just about meeting regulatory requirements; it’s about ensuring the highest safety standards. By adhering to this specification, manufacturers of FR rainwear provide a guarantee that their products offer effective protection in high-risk environments. For employers, choosing ASTM F1891 compliant rainwear means taking a significant step towards safeguarding their employees against the severe consequences of electrical arc flashes.


ASTM F1891 plays a critical role in the safety of workers in industries with electrical hazards. By understanding and adhering to this standard, manufacturers, employers, and workers can significantly reduce the risk of injury from electrical arcs. Remember, every detail counts when it comes to safety, and ASTM F1891 is a key piece in the puzzle of comprehensive protective workwear.

At NASCO Industries our FR and arc protective rain wear meets and exceeds the set industry standards. To learn more about our safety compliance visit the FR Industry Standards section of our website.