Detail of QB/T 5418-2019

Introduction of QB/T 5418-2019

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by China National Light Industry Council. This standard is under the jurisdiction of SAC/TC 174/SC 4 Subcommittee on Kitchen and Sanitary Hardwares of National Technical Committee on Hardware Products of Standardization Administration of China. This standard is issued for the first time. Thermostatic shower system 1 Scope This standard specifies the terms and definitions, classification, working conditions, materials, requirements, test methods, inspection rules as well as marking, packaging, transport and storage of thermostatic shower system (hereinafter referred to as “shower system”). This standard is applicable to the shower system used on the sanitary fixtures installed in washroom, shower room, etc. under the nominal pressure of 0.10 MPa~0.50 MPa and water medium temperature of 4℃~85℃. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 1176 Casting copper and copper alloys GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection GB/T 4208-2017 Degrees of protection provided by enclosure (IP code) GB 4706.1 Household and similar electrical appliances - Safety - Part 1: General requirements GB/T 5231 Designation and chemical composition of wrought copper and copper alloys GB/T 5270-2005 Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesion GB/T 6461-2002 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 1: Parallel internal and taper external threads GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 2: Taper internal and external threads GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads GB/T 9286-1998 Paints and varnishes - Cross cut test for films GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests GB/T 20878-2007 Stainless and heat-resisting steels - Designation and chemical composition GB/T 23447 Shower outlets for bathing GB/T 23448 Sanitary ware - Flexible hose GB 28378 Minimum allowable values of water efficiency and water efficiency grades for showers GB/T 33733-2017 Terminology and classification for the kitchen and sanitary ware fittings QB/T 5281 Digital display shower 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 33733-2017 and the following apply. 3.1 electronic thermostatic shower system shower system with sensor, CPU and electric valve controlling the inflow of cold water and hot water 3.2 slide bar device consisting of upper and lower supporting seats, mobile frame and bar, of which the upper and lower supporting seats are used for fixing the bar, the mobile frame is used for placing the shower with hose, and the mobile frame can slide up and down to adjust the height position 3.3 upstream of obturator section from the water inlet to the flow opening and closing obturator 3.4 downstream of obturator section from the flow opening and closing obturator to the end of the water outlet   3.5 temperature overide stops device for limiting the temperature-adjusting device to continue to rotate or move in the direction of increasing temperature 3.6 fidelity reproducibility and accuracy of temperature selection 4 Classification According to the control mode, it can be divided into mechanical type and electronic type. 5 Working conditions 5.1 Working pressure 0.10 MPa~0.50 MPa, a relief valve shall be installed if the water pressure exceeds 0.50 MPa. 5.2 Medium temperature The cold water temperature is 4℃~29℃, and the hot water temperature is 45℃~85℃. It is recommended that the hot water temperature in normal conditions should be 50 ℃~75 ℃. 5.3 Ambient humidity The relative humidity (RH) in the environment where the electronic thermostatic shower system used is less than or equal to 93%. 6 Materials 6.1 The components in contact with water shall not be made of materials liable to corrosion such as zinc alloy. 6.2 The cast copper shall meet the requirements of GB/T 1176 and the processing copper shall meet the requirements of GB/T 5231.   6.3 Stainless steel shall be of 06Cr19Ni10 specified in GB/T 20878-2007 or other stainless steels with the corrosion resistance not inferior to that of the above grade. 6.4 Other materials shall meet the requirements of service performance. 7 Requirements 7.1 Appearance 7.1.1 The plating surface shall be glossy, uniform and free from such defects as peeling, cracking, scorching, grinning, delamination, black dot and obvious pits and burrs. 7.1.2 The coating surface shall have fine tissue, be smooth and uniform in color and shall be free from defects such as sagging, grinning and obvious scratch and bump. 7.1.3 The polished surface shall be smooth, and free from defects such as obvious burr, scratch and bump. 7.1.4 The surfaces easily accessible to human body shall be free of flash edges, burrs, sharp corners or other defects. 7.1.5 The thread surface shall be smooth and free from obvious defects such as dent and broken tooth. 7.1.6 The surface of metal fittings shall be free of defects such as cracks, scratches or air holes and free of rust. 7.2 Processing and assembling 7.2.1 As for the products, the external pipe threads where pressure-tight joints are made on the threads shall meet the requirements of GB/T 7306.1 or GB/T 7306.2; the external pipe threads where pressure-tight joints are not made on the threads shall meet the requirements of GB/T 7307, and the precision of external threads shall not be inferior to Level B. 7.2.2 The assembled handle or hand wheel shall act light, stably, and free of jamming; the switching of transfer switch shall be stable, light, and free of jamming. 7.2.3 Shower system shall be marked with cold and hot marks which shall be firmly combined with the shower system. Cold water is represented by blue color, letter "C" or "Cold”, and hot water is represented by red color, letter "H" or "Hot"; other easily recognizable implications may be used to mark the cold and hot water. The mechanical temperature-adjusting device shall be equipped with temperature overide stops, and the limit temperature shall be clearly expressed.

Contents of QB/T 5418-2019

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Classification 5 Working conditions 6 Materials 7 Requirements 8 Test methods 9 Inspection rules 10 Marking, packaging, transport and storage Annex A (Normative) Installation structural dimensions of products Annex B (Normative) Outlet water temperature test Annex C (Normative) Life test of control function Annex D (Normative) Life test of transfer switches Annex E (Normative) Life test of rotating outlet pipes