UNE EN ISO 11611 | Protective clothing for welding and related techniques

Application range

This regulation especifies the minimun requirements and test methods to extintion clothing, including hoods, aprons, sleeves and spats used for users' protection during the welding operations and affine processes. This type of protection clothes are used to protect a user from small cast metal spashes, small contact periodes with fite, radiant heat produced by the welding arc and minize the chance of an electrical shoc by the accidental contact with electrical conductors with a 100 V d.c. voltage.

The regulation sets two level of protection:

• Class 1: Protection against lower damages in welding jobs and situations that provoke lower levels of splashes and radiant heat.
• Class 2: Protection against higher damages in welding jobs and situantions that provoke higher levels of spashes and radiant heat.

General Requisites

ISO 13688

Sizes: according to ISO 13688.

Design: Protection clothes for welding jobs must be designed without any electric conductions from the outside to the inside of the clothes, this will be ensured visually.

When the piece is composed by different clothing (jacket and trousers), the jacket must have enough length to overlap with the higher part of the trousers from at leats 20 cm. This minimum overlapping must be kept in all positions and movements expected during its use.

Pockets: if necessary, must be created with materials following EN 15025 regulations (fire propagation). External pockets in jackets and trousers, except lateral pockets under waist that doesn't make a superior angle to 10º with lateral sewing, must be covered by labels 20mm wider than the pockets averture at least.

Closures must be designed with a protection label outside the suit. Buttonholes' maximum distance must be 150 mm. Zippers must stop when are completely closed. Cuffs could have closures to reduce their width. Neck's apperture must be provided of a closure. Jackets and coveralls' sleeves, as well as the bottom of the trousers, will not have any hem.

Additional clothing (hoods, hoses, aprons and gaiters): must be designed to offer extra protection in specific areas of the body, always wearing them with the main protection suit.

Preprocessing

ISO 6330 / ISO 15797

Before each test clothes must be cleaned according to manufacturer's conditions. Additionally, during the limited fire propagation fire test will be done before and after the wash. Leather will not have preprocessing. If not specified, there will be a minimum ammount of 5 washes.

Termic features

ISO 15025

Limited fire propagation: Materials and seams must be tested under A procedure (A1 code) or B procedure (A2 code). When testing with A procedure, the following requisistes must be accomplished:

• Any sample must burn until superior or lateral edges
• A hole must not be caused in any sample
• Any burnt or melted rest must be released in any sample
• Afterburner average time must be 2s
• Residual incandescence average time must be 2s

When seams are tested, they must remain unchanged

When testing with B procedure, samples with hem must meet the following requisites:

• Any sample must burn until superior or lateral edges
• Any burnt or melted rest must be released by any sample
• Afterburner average time must be 2s
• Residual incandescence average time must be 2s

When seams are tested, with hem, they must remained unchanged. 

ISO 9150

Small splashes impact: According to the ammount of metal drops that the fabric holds before calorimeter's temperature raises from 40ºK, fabrics must be classified as:

• Class 1 > 15 drops
• Class 2 > 25 drops

ISO 6942

Calor radiante: realizando el ensayo con una densidad de flujo calorífico de 20 kW/m2 , el índice de transferencia de calor radiante (RHTI 24 ºC) debe ser:

• Para Clase 1: RHTI 24 7
• Para Clase 2: RHTI 24 16

EN 1149-2

Electric resistance: before testing, samples must be conditioned to a 20 ºC ± 2 ºC temperature and a relative humidity of 85% ± 5% . Applying an electrical potential of 100 V ± 5 V, electric resistance must be higher than 105 , for all clothing's layers.

Mechanical features

ISO 5077

Dimensional variations: Textile materials of the fabric, non-woven fabrics and laminated fabrics, must not be superior to 3%. Dimensional variation of knitted fabrics must not be superior to 5%.

ISO 13934-1

Traction resistance: traction resistance of external materials, except leather and knitted materials, must be 400N minimum in both directions (warp and woof). For leather and tested according EN 3376, traction resistance must be at least 80 N in both directions.

ISO 13937-2

Ripping resistance: Ripping resistance of external material and leather must be at least 20 N in both directions. For leather fabrics, ripping resistance must be tested according to ISO 3377-1 regulations.

ISO 13938-1

Ripping resistance: Ripping resistance of external material and leather must be at least 20 N in both directions. For leather fabrics, ripping resistance must be tested according to ISO 3377-1 regulations.

ISO 13935-2

Seams resistance: the material or the ensemble external clothing must show at least a resistance of 225 N in fabrics and 110N in leather.

EN 343

Optional requisite. Requisito opcional. Water penetration resistance (W code): if a water penetration feature is needed, clothing must be tested and clasified for water penetration and steam resistance, meeting the following requisites:

• Water penetration resistance must be tested and clasified according to EN 343 regulations.
• Steam penetration resistance must be tested and clasified according to EN 343 regulations.

ISO 13688

MARKING: Pictogram