Slim Fit FR Work Pants – Arc Rated 12 Cal, NFPA 2112 Compliant

Portwest
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SFR404
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Professional flame-resistant pants that meet NFPA 2112 & ASTM F1506 standards. Durable, ARC-rated, and designed to last 100 industrial washes — engineered for safety, comfort, and performance in the toughest industrial environments.
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Flexible CAT 2 FR Pants for Arc and Flash-Fire Programs

Portwest FR404 Bizflame 88/12 Flex FR Pants combine a slim workwear fit with verified dual-hazard performance. Portwest reports an ASTM F1959 ATPV of 12 cal/cm², classifies the pants as CAT 2, and lists the garment to NFPA 2112, NFPA 70E, and ASTM F1506.

The 10 oz stretch shell uses 86% cotton, 12% nylon, and 2% elastane. A garment-wash finish softens the fabric, while four pockets, two back patch pockets, and an adjustable hem support daily industrial work. ASA currently offers the navy style in waist sizes 30 through 44.

ManufacturerPortwest
ModelFR404
ASA Parent SKUSFR404
Sale UnitOne pair
Arc RatingATPV 12 cal/cm²
PPE CategoryCAT 2
StandardsNFPA 2112, NFPA 70E, ASTM F1506
Arc Test MethodASTM F1959
Shell Fabric86% cotton / 12% nylon / 2% elastane
Fabric Weight10 oz
ColorNavy
ASA Size OptionsWaist 30-44

Key Features

  • 12 cal/cm² ATPV
  • CAT 2 dual-hazard rating
  • Stretch 10 oz FR fabric
  • Slim, unrestricted fit
  • Four storage pockets
  • Adjustable leg hems

Common Work Environments

  • Electrical maintenance
  • Utility field work
  • Oil and gas operations
  • Petrochemical facilities
  • Industrial maintenance
  • Power generation

Portwest FR404 Slim Fit FR Work Pants FAQ

What is the arc rating of the Portwest FR404 pants?

Portwest reports an ASTM F1959 ATPV of 12 cal/cm² and classifies FR404 as CAT 2. The task-specific hazard assessment and complete PPE system still determine suitability.

Do the FR404 pants comply with NFPA 2112?

Yes. Portwest lists FR404 to NFPA 2112 and also lists NFPA 70E and ASTM F1506. Check the label on the received garment before placing it into a managed FR clothing program.

What fabric is used in the FR404 pants?

The 10 oz Bizflame 88/12 Flex shell is made from 86% cotton, 12% nylon, and 2% elastane. The elastane supplies stretch, and Portwest applies a garment-wash finish for a softer feel.

How many pockets do the Portwest FR404 pants have?

Portwest specifies four pockets, including two back patch pockets.

Can the leg length be adjusted?

Yes. Portwest describes an adjustable hem that converts the garment from a regular to a long leg. Have alterations completed only in a way permitted by the manufacturer and the employer's FR clothing program.

Which sizes does ASA currently offer?

ASA currently lists the navy style in waist sizes 30, 32, 34, 36, 38, 40, 42, and 44. Use the size selector above the description for current availability.

Are these pants high-visibility workwear?

No ANSI/ISEA 107 visibility classification is stated for FR404. Workers who require high-visibility apparel should select a separately verified garment that meets the required visibility type and class.

How should the Portwest FR404 pants be washed?

Portwest lists normal washing up to 40°C, no bleach, low-temperature tumble drying, line drying in shade, ironing up to 110°C, and no dry cleaning. Follow the sewn garment label and the employer's FR clothing care program.

Are these FR work pants fireproof?

No. FR404 is flame-resistant and arc-rated, but no garment makes the wearer fireproof. Damaged, contaminated, or improperly maintained garments should be removed from service according to the employer's program.

Professional flame-resistant pants that meet NFPA 2112 & ASTM F1506 standards. Durable, ARC-rated, and designed to last 100 industrial washes — engineered for safety, comfort, and performance in the toughest industrial environments.