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Portwest Bizflame Work FR Trousers - Dark Navy

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  • Protection against radiant, convective and contact heat
  • Certified protection against molten metal splash
  • Rule pocket
  • Back pocket
  • Durable, strong and long lasting brass zip
  • External standards label for quick identification of protection levels
  • Twin-stitched seams for extra durability
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EN ISO 11611 Guides

EN ISO 11611 - Protective Clothing For Use In Welding And Allied Processes - Features

Flap Pockets

In order to comply with EN ISO 11611 all external pockets must be flapped, except for side pockets below the waist which do not extend more than ten degrees forward of the seam.

Rule Pockets

A single rule pocket with an opening not greater than 75mm is permitted behind the side seam on one or both legs.

EN ISO 11611 - Protective Clothing For Use In Welding And Allied Processes - Features

Tensile and Tear Strength

To meet EN ISO 11611 tensile strength must be at least 400N and tear strength must be at least 15N for class 1 and 20N for class 2.

For example:

Portwest's winning FR50 style has a tensile strength value of at least 500N and tear strength of at least 25N after 50 washes.

What Is EN ISO 11611?

Protection against...

This international standard specifies minimum basic safety requirements and test methods for protective clothing for use in welding and allied processes (excluding hand protection). There are two classes with specific performance requirements.

EN ISO 11611 - Class Level Protections

Class 1 Level Protection

Class 1 is protection against less hazardous welding techniques and situations, causing lower levels of spatter and radiant heat.

Class 2 Level Protection

Class 2 is protection against more hazardous welding techniques and situations, causing higher levels of spatter and radiant heat.

EN ISO 11611 - Testing

The EN ISO 11611: standard has the following parameters:

  • Tensile Strength
  • Tear strength
  • Busting strength
  • Seam strength
  • Dimensional change
  • Requirements of leather
  • Limited Flame Spread (A1 + A2)
  • Molten Droplets
  • Heat Transfer (radiation)
  • Electrical resistance

EN 1149-5 Guides

What Is EN 1149-5?

This European standard is part of a series of standards for test methods and requirements for electrostatic properties of protective clothing.

The standard specifies material and design requirements for garments used as part of a total earthed system, to avoid incendiary discharges.

The requirements may not be sufficient in oxygen enriched flammable atmospheres.

This European Standard is not applicable for specifying protection against main voltages.

EN 1149-5: Is A Family Of Standards and Includes 5 Primary Test Methods:

EN 1149-1:

Test method for measurement of surface resistivity. Surface resistance measures the conductivity between two points on the surface of a fabric. The lower the resistance the higher the conductivity, resulting in charge going to earth.

EN 1149-2:

Test method for measurement of the electrical resistance through a material (vertical resistance). This is the level of conductivity when measured through the depth of a fabric.

EN 1149-5: Is A Family Of Standards and Includes 5 Primary Test Methods:

EN 1149-3:

Test methods for measurement of charge decay. Charge decay measures how long it takes for an electric current to dissipate. The quicker it dissipates the higher the anti-static properties of the garment.

Please note the EN 1149-4 Garment Test is under development.

EN 1149-5:

EN 1149-5 specifies the performance and design requirements to avoid static discharge for all electrostatic dissipative protective clothing as part of an entire earthed system, shoes, clothing & floor. The material meets the requirements.

EN ISO 11612 Guides

What Is EN ISO 11612? - Protective Clothing Against Heat and Flames

EN ISO 11612 is the standard for protective clothing which protects against heat and flame. Users for these garments include those who work in oil & gas, welding & allied processes, mining, petroleum and many other industries.

There are a host of specific tests conducted as part of EN ISO 11612, including tests for: Flame Spread, Tensile Strength, Tear Resistance, and Heat Resistance.

EN ISO 11612 Tests Include:

Flame Spread Test:

A flame is held against the fabric for ten seconds. After it is removed the fabric should not continue to burn. There should be no hole formation, melting or molten debris.

Tensile Strength Test:

The fabric must be able to withstand a minimum force of 300 newtons while being stretched or grabbed.

EN ISO 11612 Tests Include:

Tear Resistance Test:

The fabric must be able to withstand a minimum force of 10 newtons before it will tear.

Heat Resistance Test:

The fabric is placed in an oven at 180oC and must not ignite melt or shrink within the first 5 minutes in order to comply with the standard.

Bizflame Work Fabric

Bizflame Work Fabric

BizFlame™ Work is constructed from high-performance flame resistant fabric with added carbon fibre for inherent anti-static protection. Durable and comfortable with excellent tear and tensile strength.

STANDARDS & CERTIFICATION

  • EN ISO 11612 (A1+A2, B1, C1, E3, F1)
  • EN ISO 11611 Class 1 (A1+A2)
  • EN 1149 -5

Certification markings

CE Certified

CE Certified

This product conforms with essential health and safety requirements as set out in European Directives.

UKCA Marked

UKCA Marked

This symbol indicates UKCA marking in progress at time of print. All products placed on the UK market from January 2023 must be UKCA marked.

CE CAT III

CE CAT III

This product is CE marked as a Category 3 item for complex design.

KEY FEATURES

Protection & performance

UPF 40+

UPF 40+

40+ UPF rated fabric to block 98% of UV rays.

Comfort & practical features

Multiple Storage Pockets - 4

Multiple Storage Pockets - 4

This garment features 4 pockets.

Additional product features

Molten Metal

Molten Metal

An optional test for safety helmets, it indicates the resistance to molten metals and hot solids projection.

PRODUCT & BRAND NOTES

Gold Ecovadis Sustainability Rating 2026

Gold Ecovadis Sustainability Rating 2026

Portwest has been independently rated by Ecovadis for its environmental, social, and ethical performance and achieved a gold rating, meaning they are in the top 5% of globally rated companies.
The pillars taken into consideration include the environment, labour practices and human rights, ethics, and sustainable procurement.

PRODUCT DETAILS & SPECIFICATIONS

This rugged trouser offers comfort, strength and protection to several EN standards. Winning features include a comfort waistband, rule pocket and a handy patch pocket at the back.

  • Protection against radiant, convective and contact heat
  • Certified protection against molten metal splash
  • Rule pocket
  • Back pocket
  • Durable, strong and long lasting brass zip
  • External standards label for quick identification of protection levels
  • Twin-stitched seams for extra durability
  • 40+ UPF rated fabric to block 98% of UV rays
  • Elasticated back waist for a secure fit
  • 4 pockets for ample storage
  • Suitable to be worn in an ATEX environment
  • CE-CAT III
  • CE certified
  • UKCA marked

This rugged trouser offers comfort, strength and protection to several EN standards. Winning features include a comfort waistband, rule pocket and a handy patch pocket at the back.

  • Protection against radiant, convective and contact heat
  • Certified protection against molten metal splash
  • Rule pocket
  • Back pocket
  • Durable, strong and long lasting brass zip
  • External standards label for quick identification of protection levels
  • Twin-stitched seams for extra durability
  • 40+ UPF rated fabric to block 98% of UV rays
  • Elasticated back waist for a secure fit
  • 4 pockets for ample storage
  • Suitable to be worn in an ATEX environment
  • CE-CAT III
  • CE certified
  • UKCA marked

This rugged trouser offers comfort, strength and protection to several EN standards. Winning features include a comfort waistband, rule pocket and a handy patch pocket at the back.

  • Protection against radiant, convective and contact heat
  • Certified protection against molten metal splash
  • Rule pocket
  • Back pocket
  • Durable, strong and long lasting brass zip
  • External standards label for quick identification of protection levels
  • Twin-stitched seams for extra durability
  • 40+ UPF rated fabric to block 98% of UV rays
  • Elasticated back waist for a secure fit
  • 4 pockets for ample storage
  • Suitable to be worn in an ATEX environment
  • CE-CAT III
  • CE certified
  • UKCA marked

This rugged trouser offers comfort, strength and protection to several EN standards. Winning features include a comfort waistband, rule pocket and a handy patch pocket at the back.

  • Protection against radiant, convective and contact heat
  • Certified protection against molten metal splash
  • Rule pocket
  • Back pocket
  • Durable, strong and long lasting brass zip
  • External standards label for quick identification of protection levels
  • Twin-stitched seams for extra durability
  • 40+ UPF rated fabric to block 98% of UV rays
  • Elasticated back waist for a secure fit
  • 4 pockets for ample storage
  • Suitable to be worn in an ATEX environment
  • CE-CAT III
  • CE certified
  • UKCA marked

This rugged trouser offers comfort, strength and protection to several EN standards. Winning features include a comfort waistband, rule pocket and a handy patch pocket at the back.

  • Protection against radiant, convective and contact heat
  • Certified protection against molten metal splash
  • Rule pocket
  • Back pocket
  • Durable, strong and long lasting brass zip
  • External standards label for quick identification of protection levels
  • Twin-stitched seams for extra durability
  • 40+ UPF rated fabric to block 98% of UV rays
  • Elasticated back waist for a secure fit
  • 4 pockets for ample storage
  • Suitable to be worn in an ATEX environment
  • CE-CAT III
  • CE certified
  • UKCA marked

This rugged trouser offers comfort, strength and protection to several EN standards. Winning features include a comfort waistband, rule pocket and a handy patch pocket at the back.

  • Protection against radiant, convective and contact heat
  • Certified protection against molten metal splash
  • Rule pocket
  • Back pocket
  • Durable, strong and long lasting brass zip
  • External standards label for quick identification of protection levels
  • Twin-stitched seams for extra durability
  • 40+ UPF rated fabric to block 98% of UV rays
  • Elasticated back waist for a secure fit
  • 4 pockets for ample storage
  • Suitable to be worn in an ATEX environment
  • CE-CAT III
  • CE certified
  • UKCA marked

This rugged trouser offers comfort, strength and protection to several EN standards. Winning features include a comfort waistband, rule pocket and a handy patch pocket at the back.

  • Protection against radiant, convective and contact heat
  • Certified protection against molten metal splash
  • Rule pocket
  • Back pocket
  • Durable, strong and long lasting brass zip
  • External standards label for quick identification of protection levels
  • Twin-stitched seams for extra durability
  • 40+ UPF rated fabric to block 98% of UV rays
  • Elasticated back waist for a secure fit
  • 4 pockets for ample storage
  • Suitable to be worn in an ATEX environment
  • CE-CAT III
  • CE certified
  • UKCA marked

Specifications

Weight
0.709kg 0.709kg 0.709kg 0.709kg 0.709kg 0.709kg 0.709kg
Colour
Dark Navy
Country of Origin
 Bangladesh
 Bangladesh
 Bangladesh
 Bangladesh
 Bangladesh
 Bangladesh
 Bangladesh

Material Specs

Shell Fabric
Bizflame Work: 99% Cotton, 1% Carbon Fibre
Shell Weight
330g

Specifications are subject to change - See Terms & Conditions for more info

WASHING INSTRUCTIONS

  • Wash at 40°C maximum, gentle cycle
  • Do Not Bleach
  • Do Not Tumble Dry
  • Iron Max 150°C

    This item can be ironed on a medium temperature setting of up to 150°C

  • Do Not Dry Clean