Detail of XF 44-2015

Introduction of XF 44-2015

Helmets for firemen 1 Scope This standard specifies the terms and definitions, classification and models, technical requirements, test methods, inspection rules as well as marking, packaging, transportation and storage of helmets for firemen. This standard is applicable to helmets for firemen during firefighting and rescue. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 191 Packaging — Pictorial marking for handling of goods GB 811-2010 Helmets for motorcyclists GB/T 2410-2008 Determination of the luminous transmittance and haze of transparent plastics GB/T 4744 Textiles — Testing and evaluation for water resistance — Hydrostatic pressure method GB/T 5455 Textiles — Burning behaviour — Determination of damaged length, afterglow time and afterflame time of vertically oriented specimens GB/T 9969 General principles for preparation of instructions for use of industrial products GB/T 10000-1988 Human dimensions of Chinese adults 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 helmet for firemen protective helmet worn by firemen to protect their heads during firefighting and rescue 3.2 shell outer shell of the helmet for firemen   3.3 buffer layer adaptive padding between suspension and the inner surface of shell, which can absorb impact 3.4 suspension liner or gasket inside the helmet for firemen, which touches the top of a fireman's head 3.5 hoop adjustable hoop inside the helmet for firemen for fixing, binding the head circumference 3.6 chin strap adjustable strap tied to the chin so that a fireman can secure the helmet on his head 3.7 comfort pad material padded inside the helmet for firemen to ensure comfortable wearing 3.8 retention system complete set of devices to ensure that a fireman can secure the helmet on his head, which consists of the suspension, hoop, chin strap, etc. 3.9 face shield telescopic protective face cover installed inside the shell or reversible protective face cover installed outside the shell 3.10 evening cape protective layer installed at the lower edge of the helmet for firemen to protect their necks and ears from water and other liquids or radiant heat 3.11 accessory devices attached to the helmet for firemen, including lighting device, intercom device, infrared detection device, camera, warning sign, etc.   3.12 basic plane plane formed from the centers of a man's left and right outer earholes to the lower edge point of the right eye socket Note: See Figure 1 for the basic plane. 3.13 reference plane parallel plane at a certain distance from and above the basic plane Note: See Figure 1 for the reference plane. 4 Classification and model 4.1 Classification Helmets for firemen may be classified into full-face helmets and half-face helmets depending on structures and shapes. 4.2 Model The helmet model shall be prepared according to the requirements as follows: Example: FTK-Q/A stands for full-face helmet for firemen, and its enterprise modification code is A. 5 Technical requirements 5.1 Materials and construction 5.1.1 Composition Helmet for firemen (hereinafter referred to as "helmet") shall be composed of shell, buffer layer, comfort pad, retention system, face shield, evening cape, etc. Accessories may be installed as required. 5.1.2 Shell The material and structure of shell shall meet the following requirements: a) It shall be made of tough materials with flame retardancy, waterproof, insulation, heat resistance, cold resistance, impact resistance and heat radiation resistance; b) The top of the shell may be made into a reinforced structure with or without ribs; c) The inner surface of the shell shall be free of protrusions and sharp objects exceeding 2 mm in height and having a width of less than 2 mm; d) The outer surface of the shell shall not have external protrusions with a height exceeding 5 mm, but shall not include the face shield turned over outside the shell, the hoop adjustment device and the accessories installed on the outside of the helmet. 5.1.3 Buffer layer The buffer layer shall meet the following technical requirements: a) It shall be made of materials that can absorb impact energy and are non-toxic and non-irritating to human body; b) Shape, specification and dimension fit so that no displacement occurs when wearing; c) Uniform thickness, covering the minimum protection range of the helmet. 5.1.4 Comfort pad The materials and construction of comfort pad shall meet the following requirements: a) It shall be made of materials that are comfortable, sweat absorbing, breathable, non-toxic and non-irritating to human body; b) The comfort of wearing helmet shall be guaranteed. 5.1.5 Retention system The material and structure of the retention system shall meet the following requirements: a) The hoop, suspension and chin strap shall be made of materials that are comfortable, non-toxic and non-irritating to human body; b) The width of the chin strap shall not be less than 20 mm; c) The length of chin strap shall be adjusted flexibly and conveniently to ensure that wearing helmets is firm and comfortable, and it is convenient to release; d) The hoop size shall be flexibly and conveniently adjusted within the range of 525 mm ~ 597 mm of the head circumference;

Contents of XF 44-2015

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Classification and model 5 Technical requirements 6 Test methods 7 Test rules 8 Marking, product specification, packaging, transportation and storage