Topic Content and Scope of Application
This standard specifies the technical requirements, test methods, inspection rules, as well as marking, transportation, and storage requirements for flame retardancy.
This standard is applicable to flame retardant clothing (hereinafter referred to as flame retardant clothing) worn in industrial furnaces, metal hot processing, welding, chemical, petroleum and other places where there are open flames or sparks, or operations near molten metal, as well as in places where there are flammable substances and a risk of ignition, in order to reduce the harm of fire to the human body caused by the burning of clothing.
2 Terminology
Flame retardant: refers to the ability to slow down the spread of flames and hot objects directly, causing clothing to carbonize and form a barrier layer to protect human safety and health.
3 Technical Requirements
3.1 Quality requirements for flame retardant clothing products
3.1.1 Appearance: Clothing quality requirements shall comply with GB 2661-81.
3.1.2 Strength of the joint or stitching of clothing: The tensile strength should meet the requirements of Table 1 when tested according to the method specified in 4.2.
Table 1
tensile load
29.4N(3kg·f) 以上
3.2 Structural Design
Flame retardant clothing includes hats, jackets, pants, outerwear, and shoe covers.
3.2.1 Flame retardant clothing with general structural design must meet the following requirements.
3.2.1.1 Lightweight and sturdy to facilitate human movement.
3.2.1.2 Easy to wear and release, with a certain degree of comfort.
3.2.1.3 Flame retardant clothing generally requires open pockets with a cover to prevent the accumulation of splashing molten metal or other pollutants.
3.2.1.4 Sewing processing shall be carried out in accordance with GB 2661-81.
3.2.2 Flame retardant clothing must have ventilation holes in suitable areas to facilitate sweating and regulate body temperature. But the ventilation pores must not affect the structural strength of the clothing, and the pore structure must not allow foreign objects to enter the interior of the clothing.
3.3 Materials
3.3.1 Clothing requirements: Use fabrics that have undergone flame retardant finishing and can withstand multiple washings (synthetic laundry detergent is added to the washing machine, with a general washing concentration, temperature of 60 ℃, washing time of 15 minutes, and more than 50 washings). Hot melt fabrics that can accumulate static electricity and discharge shall not be used.
3.3.2 Suture requirements: Synthetic fiber yarns shall not be used.
3.3.3 Attachment: Buckles and hooks should be easy to connect and release. The material of buckles and hooks shall not use materials that are easily melted or flammable (if buckles and hooks are sewn inside clothing, this restriction does not apply).
4 Inspection methods
4.1 Appearance inspection: Check whether the clothing structure meets the requirements of 3.1 and 3.2.
4.2 Strength test of clothing joint: Cut a test piece with a center width of 50mm and a length of 200mm from the four parts of the finished clothing and pants, and install it on a tensile testing machine with a clamping width of 50mm and a clamping spacing of 150mm. Conduct a tensile test at a speed of 200mm/s to determine the breaking load of each test piece, and take the lower value as the tensile strength of the joint.
4.3 Flame retardant performance test: GB 5455-85 "Determination of flame retardant performance of textile fabrics by vertical method" shall be adopted.
4.4 The requirements for flame retardant performance test indicators are shown in Table 2:
Table 2
Large test parameters
indicator
Level 1
secondary
Level 3
Continuation time, s
0
4
8
Smoldering time, s
0
4
8
Damage length, mm
50
100
150
The fabric that has undergone flame retardant finishing and meets the second level is considered qualified. First level products are considered excellent. After 50 washes, the test cloth must not be lower than level three. If the textile product is found to have melting and shrinkage during the test, it is considered an unqualified product.
5 Inspection Rules
5.1 All products that produce flame-retardant fabrics and flame-retardant clothing must be inspected by the quality supervision and inspection department. If the products meet the requirements of this standard, a certificate of conformity will be issued before mass production can be allowed.
The technical department of 5.2 should conduct regular spot checks on the products of flame retardant fabric production factories, clothing factories, and user departments. When products are found to be unqualified, they should be re inspected in the same batch of products. If the re inspection still fails, this batch of products should be immediately suspended from sale and await further processing.
During the three-year storage period, the flame retardant performance of the product should be basically stable, and the connecting parts should be firm and reliable. Products stored beyond their expiration date should be sent for inspection according to regulations and re evaluated for qualification.
5.4 The quality and performance tests of textile fabrics used in the product shall be undertaken by the corresponding units of the textile department. The production factory is responsible for product self inspection and is accountable for the quality of its products.
5.5 In clothing products, 1 meter should be cut off as a sample for inspection. If each batch of products is larger than 10000 meters, 1 meter should be cut off every 10000 meters and sent to the technical inspection department for inspection and record keeping.
When the manufacturer of flame-retardant clothing produces less than 2000 sets, 2 sets should be sent for inspection. For every additional 2000 sets, 2 sets should be sent for inspection.
6 Signs, transportation, and storage
6.1 The outer packaging of the product should have the following markings: manufacturer name (or trademark), certificate number, product name, quantity, grade, item number, production batch and date, gross weight, and packaging date.
During transportation and storage, exposure to sunlight, rain, and moisture should be avoided. It should not be placed together with acids, alkalis, oils, or corrosive substances. The storage warehouse should be kept ventilated and dry, and the product should be stored at a distance of at least 200mm from the ground and walls. | | |