Guide · 9 min read
NFPA 2112 Explained: The Flame-Resistant Clothing Standard for Flash Fire
NFPA 2112 is the US standard that sets minimum performance requirements and test methods for flame-resistant garments worn by industrial workers exposed to flash fire, which the standard calls short-duration thermal exposure from fire. A garment can only be called compliant if it has been certified by an independent certification organization and carries that organization's label. This guide explains the tests, the label, who needs 2112 clothing and how it differs from NFPA 70E.
What is NFPA 2112?
NFPA 2112, Standard on Flame-Resistant Clothing for Protection of Industrial Personnel Against Short-Duration Thermal Exposures from Fire, sets the performance requirements and test methods for flame-resistant fabric and garments worn by industrial workers. It is published by the National Fire Protection Association.
The standard exists because ordinary clothing makes flash fire burns worse. In a hydrocarbon flash fire, exposed skin usually suffers superficial burns, while skin under burning or melting everyday clothing can suffer deep, full-thickness burns. Compliant garments are designed first not to ignite and keep burning, and second to provide a measure of thermal insulation during the few seconds of a short-duration fire, giving the wearer time to escape.
It is important to be clear about what 2112 is not:
- It is not a firefighting standard. Structural and wildland firefighter gear have their own NFPA standards.
- It is not an arc flash standard. Electrical arc hazards are covered by NFPA 70E and arc ratings.
- It does not tell employers when to use FR clothing or how to care for it. That is the job of its companion standard, NFPA 2113.
Current editions of the standard and its companion
| Standard | Purpose | Current edition |
|---|---|---|
| NFPA 2112 | Performance requirements, test methods, certification and labeling for FR garments | 2023 |
| NFPA 2113 | Selection, care, use and maintenance of 2112 garments | 2025 |
Recent editions changed the NFPA 2112 standard in ways buyers notice:
- 2018 edition: replaced the term “flash fire” with “short-duration thermal exposures from fire,” built cold-weather insulation materials into the standard, and added requirements for hoods, shrouds, balaclavas and gloves, as summarized by fabric maker Westex.
- 2023 edition: brought barrier face coverings under full certification and the ASTM F3502 face-covering standard, adjusted heat transfer testing for whole knitted gloves, and refined other test procedures, according to test lab ArcWear’s summary.
Who needs NFPA 2112 clothing
The standard applies directly to manufacturers, fabric makers and certification organizations. Employers come into it through their duty to protect workers: under 29 CFR 1910.132, every employer must assess workplace hazards and provide suitable PPE. Where that assessment identifies a flash fire hazard, certified flame-resistant garments are the accepted way to protect the body.
Typical flash fire environments include:
- Oil and gas drilling, well servicing and production (see oil and gas FR clothing).
- Refineries, petrochemical and chemical plants.
- Natural gas transmission and distribution, and gas utilities.
- Pipeline construction and maintenance.
- Facilities handling combustible dusts, such as grain, sugar, flour and some metal powders.
- Pharmaceutical and specialty chemical plants using flammable solvents.
OSHA does not have a rule naming this standard for every industry, but it has acted where flash fire hazards are recognized. Its March 2010 memorandum, Enforcement Policy for Flame-Resistant Clothing in Oil and Gas Drilling, Well Servicing, and Production-Related Operations, explains when compliance officers may cite employers under 1910.132(a) for failing to provide and require flame-resistant clothing in those operations.
Tip: NFPA 2113 includes guidance to help employers decide whether a site or task needs 2112 clothing at all. If you are building a new program, start with the hazard assessment and 2113, then specify garments to 2112.
How NFPA 2112 tests flame-resistant fabric
The standard sets a “safety net” of tests rather than a single test, because no laboratory can recreate every real fire. The protective outer fabric gets the most demanding testing; thread, closures (buttons, snaps, zippers), interior labels, hi-vis trim, linings and insulation are tested as components. The table below summarizes the key pass/fail tests as described by industry summaries such as Apparel Solutions and Tyndale. Exact procedures are in the standard itself.
| Test | What it simulates | Pass criteria (summary) |
|---|---|---|
| Flame resistance (vertical flame, ASTM D6413) | Fabric contact with a flame | Afterflame no more than 2 seconds; char length no more than 4 in (100 mm); no melting or dripping. Tested as received and after repeated laundering |
| Heat transfer performance (HTP) | Heat passing through fabric to skin | At least 6.0 cal/cm² spaced and 3.0 cal/cm² in contact |
| Thermal shrinkage (oven at 500°F / 260°C) | Fabric shrinking away in heat | No more than 10% shrinkage |
| Heat resistance (oven at 500°F / 260°C) | Fabric, thread and hardware in heat | No melting, dripping, separation or ignition |
| Instrumented manikin (ASTM F1930) | A full-body flash fire | No more than 50% predicted body burn after a 3-second exposure at about 2 cal/cm² per second |
A few points that help when reading spec sheets:
- The manikin result is a percentage of predicted second- and third-degree burn on the manikin’s sensors, excluding hands and feet. It is not the same as the “total body surface area” percentages used in burn medicine, and lower is better.
- The manikin test uses a standard test coverall, not the production garment, so it rates the fabric. The garment’s design (closures, overlaps, fit) still matters in the field.
- Hoods, balaclavas and gloves are not tested on the full-body manikin; they have their own requirements.
Fabric families that can be certified
| Fabric family | How it works | Considerations |
|---|---|---|
| Treated cotton and cotton/nylon blends | FR chemistry bonded to the fiber | Cotton comfort; follow care instructions to keep the protection effective |
| Inherent FR blends (modacrylic, aramid, FR rayon and similar) | Flame resistance is part of the fiber | Often lighter for the same protection; usually higher cost |
Both families can be certified. The certified label, not the fiber name, is what proves compliance.
NFPA 2112 certified clothing: certification and labeling
This is the part of the standard most often misunderstood by buyers.
- Third-party certification is mandatory. A garment complies only when an independent certification organization, accredited for product certification, has certified it. The standard warns that without the required label no claim may be made of meeting any part of it.
- The label must be permanent and conspicuous. It includes a compliance statement naming the standard and its edition, the certification organization’s mark, and manufacturer and care information.
- Certification is ongoing. Certifiers audit manufacturing and retest products periodically, so a certificate from years ago does not cover today’s production by default.
- Components count. Thread, zippers, snaps, reflective trim and interior labels in a certified garment must meet the standard’s component requirements. Swapping in a non-FR zipper breaks compliance.
- Exterior emblems and embroidery are not part of the certified fabric. They are allowed, but their size and number should be limited.
Tip: When a supplier says a garment is “made with NFPA 2112 fabric,” ask to see the garment label with the certifier’s mark. Certified fabric sewn into an uncertified garment is not NFPA 2112 certified clothing.
NFPA 2112 vs NFPA 70E
The two standards are often listed together, but they answer different questions.
| NFPA 2112 | NFPA 70E | |
|---|---|---|
| Hazard | Flash fire (short-duration thermal exposure from fire) | Electric arc flash and shock |
| Who it is written for | Garment and fabric makers, certifiers | Employers and electrical workers |
| What it does | Sets fabric/garment tests and certification | Sets safe work practices and PPE selection |
| Key metric | Pass/fail tests, including manikin body burn | Arc rating in cal/cm² (ATPV or EBT) |
| Label to look for | 2112 compliance statement with certifier’s mark | Arc rating and ASTM F1506 statement |
| Companion standard | NFPA 2113 (selection, care, use) | ASTM F1506 (arc-rated textiles) |
Many FR garments are dual-certified: 2112 compliant and arc-rated. That is the practical choice for workers who face both hazards.
Worked example: refinery crews
A refinery has three groups of workers. Process operators work in units where a vapor release could ignite: they need flash fire rated FR clothing. In-house electricians work in the same units and also perform energized work rated at PPE Category 2: they need garments that are both 2112 certified and arc rated at 8 cal/cm² or more. Office staff who only walk through designated walkways may need FR clothing in some areas depending on the site’s assessment. One dual-certified daily-wear spec for operators and electricians simplifies purchasing, laundering and visitor policy.
Care, inspection and retirement under NFPA 2113
NFPA 2113 puts responsibilities on employers and wearers once garments are issued. Key practices:
- Wear it correctly: fully fastened, sleeves down, shirt tucked, as the outer layer, with no meltable synthetics next to the skin.
- Keep it clean: flammable contaminants such as oil and grease reduce protection. See our guide on how to wash FR clothing.
- Inspect before wear and after cleaning: look for holes, tears, worn-thin areas, broken closures and lost labels.
- Repair only with FR materials: manufacturer guides such as Duluth Trading’s FR user information state that repairs must use FR fabric, thread and components.
- Retire garments that are contaminated beyond cleaning, damaged beyond repair, altered, or no longer fit.
Common mistakes with flash fire clothing
- Accepting “meets 2112” without a certified label. Self-declared compliance is not compliance.
- Assuming 2112 means arc rated. Check for an arc rating if electrical work is involved.
- Adding non-FR hi-vis. A standard polyester safety vest over FR clothing can melt and ignite. Use FR hi-vis garments or FR-rated trim; see our hi-vis clothing options, which are specified by ANSI/ISEA 107 class.
- Large heat-transfer logos. Keep decoration small and use methods your garment maker approves.
- Synthetic base layers and fleece. Undergarments and mid-layers should be non-melting.
Buyer checklist: verifying certified FR garments
Before you approve a garment for an FR program, check:
- The sewn-in label names the standard and the edition, and carries the certification organization’s mark.
- The certifier is independent and accredited for product certification, and the product appears in the certifier’s listing or directory.
- Every component is covered: zippers, snaps, thread and any reflective trim are part of the certified construction.
- Arc rating, if needed, is printed on the label in cal/cm² alongside the 2112 statement.
- A user information guide comes with the garments, covering wear, care, inspection and retirement.
- Decoration is approved: the logo method and size are acceptable to the garment maker.
Tip: Re-check labels when a supplier changes fabric, trim or factory. A certification covers a specific construction; a “same garment, new zipper” substitution may not be covered.
Ordering NFPA 2112 workwear for your team
When you specify FR workwear, write down the hazard (flash fire, arc flash or both), the standard and edition required, the minimum arc rating if needed, styles (shirts, pants, coveralls), sizes, colors, and decoration. Custom Uniform Factory cuts and sews branded workwear in our Los Angeles factory with a minimum of about 50 pieces per style. For fire resistant clothing programs, we confirm fabric, component and certification documentation at quote stage so you can check it against your hazard assessment before any garment is made. Crews in welding, oil and gas are the most common users of these programs.
This guide summarizes the 2112 and 2113 standards for buyers and program managers. It is not a substitute for the standards or your company’s hazard assessment.
Frequently asked questions
What does NFPA 2112 certified mean?
It means an independent, accredited certification organization has tested the garment's fabric and components to the standard, audits the manufacturer, and allows its certification mark on the garment label. Without that third-party label, no garment can claim to meet any part of NFPA 2112. A fabric test report or a supplier's own statement is not certification.
Does NFPA 2112 clothing protect against arc flash?
Not automatically. NFPA 2112 tests for flash fire. Arc flash protection under NFPA 70E requires an arc rating in cal/cm² from ASTM F1959 testing and labeling to ASTM F1506. Many garments carry both, which is common in oil, gas and utility work. Check the label for both the flash fire compliance statement and an arc rating.
Is NFPA 2112 required by OSHA?
OSHA has no rule that names NFPA 2112 for all industries. Employers must assess hazards and provide suitable PPE under 29 CFR 1910.132, and where a flash fire hazard exists, OSHA has cited employers for failing to provide flame-resistant clothing, notably in oil and gas operations. Most employers specify certified 2112 garments to meet that duty.
What is the difference between NFPA 2112 and NFPA 2113?
The 2112 document is for manufacturers and certifiers: it sets fabric and garment performance tests and labeling. NFPA 2113 is for employers and wearers: it covers when flame-resistant clothing is needed, how to select it, and how to wear, care for, inspect and retire it. A sound FR program uses both.
Can I put my company logo on certified FR clothing?
Yes, with care. Exterior emblems and embroidery are not part of the certified fabric, so keep them few and small, use flame-resistant thread, and avoid meltable heat-transfer materials. Ask the garment's manufacturer or certifier what decoration is allowed so the garment keeps its certification.
Need garments made?
Custom Uniform Factory cuts and sews scrubs and workwear in Los Angeles from 50 pieces per style, with your logo or label. Get a quote or request samples.
