QB/T 5418-2019 English PDF (QBT5418-2019)

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QB/T 5418-2019: Thermostatic shower system
QB/T 5418-2019
QB
LIGHT INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.70
Classification No.: Y71
Thermostatic shower system
恒温淋浴器
ISSUED ON: DECEMBER 24, 2019
IMPLEMENTED ON: JULY 01, 2020
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Categories ... 6
5 Working conditions ... 6
6 Materials ... 7
7 Requirements ... 7
8 Test method ... 15
9 Inspection rules ... 28
10 Sign, packaging, transportation, storage ... 30
Appendix A (Normative) Product installation structure size ... 32
Appendix B (Normative) Outlet water temperature test ... 34
Appendix C (Normative) Control function life test ... 36
Appendix D (Normative) Transfer switch life test ... 38
Appendix E (Normative) Service life test of rotating outlet pipe ... 40
Thermostatic shower system
1 Scope
This standard specifies the terms and definitions, classification, working conditions,
materials, requirements, test methods, inspection rules and signs, packaging,
transportation, storage of thermostatic showers (hereinafter referred to as "showers").
This standard applies to showers, which are installed in bathrooms, shower rooms, and
other sanitary facilities, under the conditions of nominal pressure 0.10 MPa ~ 0.50
MPa and water medium temperature 4 °C ~ 85 °C.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
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 - Revies 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
6 Materials
6.1 Parts in contact with water shall not use corrosive materials, such as zinc alloy.
6.2 Casting copper materials shall comply with the provisions of GB/T 1176. Processed
copper materials shall comply with the provisions of GB/T 5231.
6.3 The stainless steel material shall be 06Cr19Ni10, which is specified in GB/T 20878-
2007, or other stainless steel materials with corrosion resistance not lower than the
above designations.
6.4 Other materials shall meet the performance requirements.
7 Requirements
7.1 Appearance
7.1.1 The surface of the plating shall be glossy and uniform. There shall be no defects
such as peeling, cracking, burning, exposed bottom, peeling off, black spots, obvious
pitting, burrs.
7.1.2 The surface of the coating shall be fine-structured, smooth, uniform in color. There
shall be no defects such as sagging, exposed bottom, obvious scratches, bumps.
7.1.3 The polished surface shall be smooth. There shall be no obvious defects such as
burrs, scratches, bumps.
7.1.4 There shall be no defects such as burrs and sharp corners on the surface, that is
accessible to the human body.
7.1.5 The thread surface shall be smooth and clean. There shall be no obvious dents,
broken teeth, and other defects.
7.1.6 There shall be no cracks, scars, pores, rusts, etc., on the surface of metal fittings.
7.2 Processing and assembly
7.2.1 The external sealing pipe thread of the product shall meet the requirements of
GB/T 7306.1 or GB/T 7306.2. The external non-sealing pipe thread of the product shall
meet the requirements of GB/T 7307, where the external thread shall not be lower than
the grade B precision of GB/T 7307.
7.2.2 The action of the assembled handle or handwheel shall be light, stable and free
from jamming; the transfer switch shall be switched smoothly, lightly and free from
jamming.
7.4.6.2 Flow reduction
Test according to 8.4.6.2. After 30 s, the temperature (Tm) of the shower mixture shall
deviate from the initial temperature (T0) by no more than 2 K, meanwhile the
temperature fluctuation shall not be greater than 1 K.
7.4.6.3 Changes in water supply pressure
Test according to 8.4.6.3. For non-shower outlets: The temperature of the mixed water
(Tm) shall not deviate from the initial temperature (T0) by more than 2 K. For shower
outlets or outlets for other purposes: In the first 5 s, the duration -- where the deviation
between the mixed water temperature (Tm) and the initial temperature (T0) exceeds 3 K
-- shall not be more than 1 s; after 5 s, the mixed water temperature (Tm) shall not
deviate from the initial temperature (T0) by more than 2 K, meanwhile the temperature
fluctuation shall not be greater than 1 K.
7.4.6.4 Changes in supply water temperature
Test according to 8.4.6.4. For non-shower outlets: The temperature of the mixed water
(Tm) shall not deviate from the initial temperature (T0) by more than 2 K. For shower
outlets or outlets for other purposes: In the first 5 s, the duration -- where the deviation
between the mixed water temperature (Tm) and the initial temperature (T0) exceeds 3 K
-- shall not be more than 1 s; after 5 s, the mixed water temperature (Tm) shall not
deviate from the initial temperature (T0) by more than 2 K, meanwhile the temperature
fluctuation shall not be greater than 1 K.
7.4.7 Safety
7.4.7.1 Failure of cold water
Test according to 8.4.7.1. After the cold water is turned off, the mixed water temperature
(Tm) shall not exceed 49 °C, when the water output within the first 5 s is not greater
than 200 mL; the mixed water temperature (Tm) shall not exceed 42 °C, when the water
output within the first 5 s is greater than 200 mL; the water output within the next 30 s
shall not exceed 300 mL. After the cold water supply is restored, the deviation of the
mixed water temperature (Tm) from the initial temperature (T0) shall not exceed 2 K.
7.4.7.2 Failure of hot water
Test according to 8.4.7.2. After the hot water is turned off, the water output in the first
5 s shall not exceed 250 mL; after the hot water supply is resumed, the deviation --
between the mixed water temperature (Tm) and the initial temperature (T0) -- shall not
exceed 2 K.
7.4.8 Outlet water temperature
Carry out the test according to 8.4.8. The maximum temperature of the outlet water
shall be 38 °C ~ 49 °C.
7.4.9 Service life
7.4.9.1 Control functions
Carry out 30000 cycle tests according to 8.4.9.1. During the test, the parts shall not be
broken, jammed, leaked. After the test is completed, the performance shall meet the
requirements of 7.4.2, 7.4.4, 7.4.5, 7.4.6, 7.4.7.
7.4.9.2 Transfer switch
Carry out 30000 cycle tests according to 8.4.9.2. During the test, the components shall
not be deforme...