1. General and design requirements
1.1 General: General requirements which are not specifically covered in this International Standard shall be in accordance with ISO 13688.
Welders’ protective clothing shall be designed to prevent electrical conduction from the outside to the inside, e.g. by metal fasteners. Conformity shall be checked by visual inspection.
1.2 Protective clothing: Welders protective suits shall completely cover the upper and lower torso, neck, arms to the wrist, a legs to the ankle. Suits shall consist of the following:
a) a single garment, e.g. an coverall or boiler suit;
b) a two-piece garment, consisting of a jacket and a pair of trousers.
Pleats in the exterior surface of the garment can act as trapping points for hot /molten materials. If pleats are present in the garment, the bottoms of the pleats shall incorporate a means whereby entrapment of molten metal can be prevented, for example by incorporating diagonal stitches or some other feature. Conformity shall be checked by visual inspection.
1.3 Size designation and fit: Garment sizes shall be in accordance with the requirements of Iso 13688.
Where protection to the requirements of this International Standard is provided by an outer two piece suit, it shall be determined that, when correctly sized for the wearer, an overlap between the jacket and trousers remains when one standing wearer firstly fully extends both arms above the head and then bends over until the fingertips touch the ground.
Conformity shall be checked by visual inspection including an assessment of fit and physical measuring when the appropriate size of clothing is donned by a wearer.
In addition, the wrists, lower arms, and ankles shall also remain covered in an upright position; this shall also apply to one piece suits.
1.4 Additional protective garments: Welder’s protective garments can be designed to provide extra protection for specific areas of the body when worn in addition to a suit according to 4.2, e. g, neck curtain, hoods, sleeves, apron, and gaiters. Aprons shall cover the front body of the user at least from side seam to side seam.
In the case of hoods, manufacturers shall identify the specific(s) visors to be incorporated into the hood.
Performance testing of additional protective garments shall be carried out on the assembly, comprising the suit plus the additional protective garment. Additional protective garments such as hoods, sleeves, apron, and gaiters shall cover the intended areas when worn with a suit of appropriate size and the additional item alone shall also meet the requirements of this International Standard
1.5 Pockets and flap closures: Where garments are constructed with pockets, the pockets shall be constructed to the following design:
a) pockets with external openings, including patch pockets shall be made of material(s) conforming to 6.7 and 6.8
b) external opening pockets including pass-through openings shall have a covering flap except for:
– side pockets below the waist which do not extend more than 10° forward of the side seam
– a single rule pocket with an opening not greater than 75 mm placed behind the side seam on one or both legs and measured flat
c) all flaps shall be at least 20 mm wider than the opening (at least 10 mm on each side) to prevent the flap from being tucked into the pocket. They shall be stitched down on each side or capable of covering the pocket opening by fastening. Flap materials shall conform to 6.7 and 6.8
Conformity shall be checked by visual inspection and physical me
1.6 Closures and seams:
Closures shall be designed with a protective cover flap on the outside of the garment. The maximum distance between buttonholes/press studs shall be 150 mm. If zippers are used, the slide fastener shall be designed to lock when completely closed. Cuffs can be provided with closures to reduce their width.
The closure and any fold which it creates shall be on the underside of the cuff. Cuffs shall not have turn-ups. Neck openings shall be provided with closures.
Trousers or the -piece suits shall not have turn-ups. They can have side slits which shall have a means of closure and the slit and closure shall be covered.
Conformity shall be checked by visual inspection
Hardware penetrating the outer material of a welders protective garment or garment assembly shall not be exposed to the innermost surface of the garment or the garment assembly.
Conformity shall be checked by visual inspection.
2 Sampling and pre-treatment
The number of samples and the size of the specimens of garment materials or garments presented to the different test methods, shall be in accordance with the respective test standards specified in the requirements of Clause 6. Samples for testing shall be taken from the original garment or shall be representative of the component assembly.
2.2 Pre-treatment of material
Before each test specified in 6.2 to 6.10, the test materials and test specimens shall be pre-treated by cleaning. If the manufacturer’s instructions indicate that cleaning is not allowed, i.e. single use garments, then testing will be carried out on new material. In addition, 6.7 requires that the limited flame spread tests shall be carried out both before the pre-treatment and after the pre-treatment.
The cleaning shall be in line with the manufacturers instructions, on the basis of standardized processes. If the number of cleaning cycles is not specified, the tests shall be carried out after five cleaning cycles (a cleaning cycle is one wash and one dry cycle). This shall be reflected in the information supplied by the manufacturer. If the garment can be washed and dry-cleaned, it shall only be washed. If only dry-cleaning is allowed. the garment shall be dry-cleaned in accordance with the manufacturers instructions.
Leather materials shall be tested in the new state, except if the manufacturer indicates that cleaning is allowed. In that case, cleaning shall be carried out according to the manufacturers instructions
The test specified in 6.11 shall be carried out in the new state (as received)
In the case that the garment should be submitted to some treatment to maintain its limited flame spread property as specified in 6.7 the manufacturer shall indicate the maximum number of cleaning cycles that can be carried out before applying the treatment indicated to maintain the garment protective performance. Limited flame spread test according to 6.7 shall be carried out after the last cleaning cycles before any treatment as indicated by the manufacturer, in both cases, the garment shall comply with the requirement.
Specimens other than leather shall be conditioned for at least 24 h in an atmosphere having a temperature of (20± 2)℃ and a relative humidity of (65± 5)%. Leather specimens shall be conditioned for at 48 h in an atmosphere having a temperature of (20± 2)℃ and a relative humidity of (65± 5)%. Testing shall be carried out within 5 min of removal from this atmosphere
Samples for electrical resistance testing specified in 6.10 shall be conditioned and tested in an atmosphere having a relative humidity of(85±5%) and a temperature of(20±2)°C
4 General performance requirements
This International Standard specifies two classes with specific performance requirements (see AnnexA). I.e. Class 1 being the lower level and Class 2 the higher level
– Class 1 is protection against less hazardous welding techniques and situations, causing lower levels of spatter and radiant heat.
– Class 2 is protection against more hazardous welding techniques and situations, causing higher levels of spatter and radiant heat
Details are given in Table 3 and AnnexA
Wherever in Clause 6 the requirements for a property value are expressed in terms of a minimum or maximum value and wherever a minimum or maximum value is to determine a Level or Class for that property, the resultant property value shall be determined according to Annex B. For all tests in Clause 6 shall be evaluated in accordance with Annex C.
4.2 Tensile strength
When tested in accordance with IS0 13934-1, woven outer materials shall have a minimum tensile strength of 400 N in both the machine and cross directions.
When tested in accordance with IS0 3376, leather outer materials shall have a minimum tensile strength of 80 N in two directions at right angles when the standard test
specimen defined in IS0 3376: 2011, Table 1 is used.
4.3 Tear strength
When tested in accordance with IS0 13937-2, woven outer materials shall have a minimum tear strength of 15 N in both the machine and cross directions for Class I welders clothing and 20 N in both the machine and cross directions for Class 2 welders clothing. When tested in accordance with IS0 3377-1, leather outer materials shall have a minimum tear strength of 15 N in two directions at right angles in the plane of the material for Class I welders clothing and 20 N in two directions at right angles in the
plane of the material for Class 2 welders clothing.
4.4 Burst strength of knitted materials and seams
When tested in accordance with ISO 13938-1 0r ISO 13938-2. knitted outer materials and structural seams in knitted materials shall have a minimum burst strength of 100 kPa, when using 50 cm² test area, or 200 kPa, when using a 7.3 cm² test area.
4.5 Seam strength
When tested in accordance with 150 13935-2, structural seams of woven outer materials and leather materials of the clothing assembly shall have a minimum seam strength of 225 N.
4.6 Dimensional change of textile materials
Dimensional change shall be measured before and after the samples have undergone five cleaning cycles according to 5.2.
The charge in dimensions of woven, non-woven, and sheet materials shall not exceed ±3% in either length or width direction when measured in accordance with ISO 5077.
Dimensional change shall be measured after the specimen has been uncreased and flattened on a plane surface.
Dimensional change does not apply to single use garments.
4.7 Limited flame spread
Testing of materials and seams shall take place in accordance with ISO 15025, Procedure A(code letter A1) and optionally Procedure B (code letter A2). This test shall be carried out both before and after the pre-treatment specified in 5.2.
4.7.2 Testing in accordance with ISO 15025, Procedure A (code letter A1)
22.214.171.124 When tested in accordance with ISO 15025, Procedure A, specimens from single layer garments shall meet the following requirements.
For seams, three specimens containing a structural seam shall be tested in accordance with IS0 15025, Procedure A Specimens shall be oriented with the seam running up the centreline of outer surface of the test specimen so that the burner flame impinges directly upon the seam. Seams shall not separate.
Except for leather, seams shall be tested only after pre-treatment according to 3.2.
126.96.36.199 If the garment is multilayer, specimens of the material assembly including seams, except the innermost seams, shall be tested both by applying the flame to the surface of the outer material of the garment and to the innermost lining of the garment and shall meet the requirements of 188.8.131.52, including that no specimen shall give hole formation except for an interlining that is used for specific protection other than heat protection, for example liquid penetration.
184.108.40.206 Hardware, whether it is exposed or covered when all closure systems in the garment are in the closed position, shall be tested separately, using ISO 15025, Procedure A, after the pre-treatment specified in 5,2. Samples shall be taken in combination with the garment layer(s) to make it possible to have samples with the dimensions as indicated in ISO 15025, Procedure A. Three specimens containing the hardware shall be tested.
When the hardware is covered, the flame shall be applied to the outer surface of the component assembly containing hardware exactly as designed in the garment so that the burner flame impinges directly upon the place where the hardware is located. When the hardware is directly exposed, the flame shall be applied directly upon the hardware.
When the hardware is covered when all closure systems in the garment are in the closed position, the assembly shall meet the requirements of 4.7.2 1. At least five minutes after completion of the test, it shall be verified that the closure system can be opened at least once.
When the hardware is directly exposed, it shall comply with: no specimen shall melt or giving flaming or molten debris; the afterglow time shall be ≤2 s and the afterflame time shall be ≤2 s. At least five minutes after completion of the test, it shall be verified that the closure system can be opened at least once.
220.127.116.11 Labels, badges, retro-reflective materials, transfers, etc, which are applied to the outermost surface of the garment, shall be tested only after pre-treatment according to 3.2, in combination with the outer layer to make it possible to take samples with the dimensions as indicated in ISo 15025, Procedure A, three specimens containing the item shall be tested. The items shall be oriented with the longer dimensions running up the centreline of the test specimen so that the burner flame impinges directly upon
the middle surface of the item, not the edge. The combination with the outermost layer of the garment shall meet the requirements of 18.104.22.168. This requirement is not applicable for labels, embroideries, or other added decorations with a surface area of less than 10 cm².
4.7.3 Testing in accordance with ISo 15025, Procedure B(code letter A2)
22.214.171.124 When tested in accordance with ISO 15025, Procedure B, hemmed specimens from single layer garments, shall meet the following requirements.
For seams, three specimens containing a structural seam shall be tested in accordance with ISO 15025, Procedure B Specimens shall be oriented with the seam running up the centreline of the test specimen so that the burner flame impinges directly upon the seam. Seams shall not separate. Except for leather, seams shall be tested only after pre-treatment according to 3.2
126.96.36.199 The hemmed fabric specimen shall be taken from the original garment or prepared in the same manner as used in the construction of the clothing.
188.8.131.52 If the garment is multilayer, hemmed specimens of the material assembly including seams shall
be tested by applying the flame to the edge of the multilayer assembly and shall meet the requirements of 184.108.40.206.
4.8 Impact of spatter (small splashes of molten metal)
When tested according to ISo 9150, the outer material or material assembly shall require
– at least 15 drops of molten metal to raise the temperature behind the test specimen by 40 K for Class 1, and
– at least 25 drops of molten metal to raise the temperature behind the test specimen by 40 K for Class 2.
Material and material assemblies which ignite during the test do not meet this requirement
4.9 Heat transfer (radiation)
When tested in accordance with IS0 6942, Method B, at a heat flux density of 20 kW/, single layer or multilayer garments, and /or clothing assemblies that are claimed to offer protection against radiant heat shall meet a radiant heat transfer index (RHTI for 24℃)of
– for Class 1: RHTI 24≧7.0, and
– for Class 2: RHTI 24 ≧ 16,0.
If the garment is multi-layered, the test shall be carried out on the complete material assembly with the innermost layer facing the calorimeter and the outermost layer facing the energy source.
4.10 Electrical resistance
Conditioning and testing of the samples shall be carried out at a temperature of (20±2)℃ and relative humidity of (85± 5)%. When the material assembly is tested in accordance with the test method specified in EN 1149-2 and under an applied potential of (100± 5)V, the electrical resistance shall be greater than 105 (corresponds to less than 1 mA leakage current) for all assemblies of the clothing. Seams shall be taken into account when preparing test samples.
4.11 Fat content of leather
When tested according to ISO 4048:2008, the fat content of leather shall not exceed 15%.
4.12 Performance requirements
The summary of performance requirements are summarized in Table 3.