VIGA krantillverkare 
Nyligen, the Nanjing Municipal Bureau of Quality Supervision released the results of the 2017 residents’ home improvement products quality spot check, involverande kranar, rostfritt stål handfat, bathroom brackets and paint-free boards. The pass rate of faucets is the lowest at 67.5%, and the pass rate of faucets priced at 100 yuan and below is only 14.3%.
Den okvalificerade hastigheten för kranar under 20$ is as high as 85.7%
Tidigare, the Nanjing Municipal Bureau of Quality and Technical Supervision commissioned the Nanjing Product Quality Supervision and Inspection Institute to conduct random inspections on 40 batches of faucet products sold by production enterprises, circulation areas and e-commerce platforms in Nanjing. Efter inspektion, 27 batches were qualified and 13 batches were unqualified, med en passfrekvens 67.5%.
Nanjing Quality Supervision Bureau classified the test results according to the product source and price range, and the results were eye-catching.
De 40 batches of tap products sampled this time were 20 satser, 19 partier och 1 batch sampled from physical stores, e-handelsplattformar och tillverkningsföretag, respektive. Bland dem, the qualification rate of physical store products is the lowest at 55%; the qualification rate of e-commerce platform products is 78.9%; and the qualification rate of production enterprises is 100%.
Ur produktpriserna, passfrekvensen för produkter av 70$ and above is 100% (unqualified rate 0%), and the pass rate of products between 20$ och 70$ är 85.7% (unqualified rate 14.3%). The pass rate of products between 20$ och 40$ är 62.5% (the unqualified rate is 37.5%), och passfrekvensen för produkter av 100 Yuan och nedan är 14.3% (the unqualified rate is 85.7%).
2 batches of faucet metal pollutants precipitation exceeded the standard
This sampling inspection was carried out in accordance with GB 18145-2014 “Keramisk ark tätningskran” och GB 25501-2010 “Limited Value of Faucet Water Efficiency and Water Efficiency Grade”. Bland 13 partier av okvalificerade produkter, the unqualified items mainly related to surface corrosion resistance, vatteneffektivitet, flödesenhet och material, among which 2 batches of products were detected to exceed the standard of metal pollutant precipitation (leda).
Dessutom, this sampling inspection also refers to the standard of QB/T 1334-2013 “General Technical Conditions for Faucets”, and carried out the sealing performance of the faucet after freezing for 4 timmar, 8 timmar, 12 timmar, och 24 hours at a low temperature of -10°C. Risk monitoring. Efter inspektion, 33 batches of faucets meet the standard requirements, with a compliance rate of 82.5%.
Inspektionsartikelanalys
①Flow uniformity and water efficiency grade
Flow uniformity and water efficiency grade Among the samples sampled this time, 1 batch of water efficiency grade was unqualified, Och passfrekvensen för detta projekt var 97.5%; 3 batches of flow uniformity were unqualified, Och passfrekvensen för detta projekt var 92.5%. These two items are the requirements for the energy efficiency of the water tap, and the uniformity of the flow is the prerequisite for evaluating the water efficiency grade of the tap. Excessive flow of water nozzles will cause waste of water resources, which is not conducive to the implementation of my country’s energy conservation and emission reduction policies.
② Surface korrosionsmotstånd
Among the samples sampled this time, 12 batches of surface corrosion resistance were unqualified, Och passfrekvensen för detta projekt var 70%. Products with unqualified surface corrosion resistance are prone to rust during use, which will not provide protection and affect the appearance and use of the product. The surface corrosion resistance of the faucet not only depends on the company’s electroplating process, men involverar också olika aspekter som material, gjutningsprocess, polering och förbehandling.
③Precipitation of metal pollutants
Among the samples sampled this time, 2 batches of metal contaminants were unqualified, Och passfrekvensen för detta projekt var 95%. Utfällningen av metallföroreningar är relaterad till människors hälsa, särskilt ansamlingen av bly i människokroppen, which can cause long-term health risks in the human body and affect the normal physiological functions of the human body. The low-grade copper grades of faucet products and the substandard production process of the enterprise are all causes of excessive precipitation of metal pollutants.
(Unqualified samples precipitated by gold contaminants)
④Material
Among the samples sampled this time, 7 batches of materials were unqualified, Och passfrekvensen för detta projekt var 82.5%. Vissa produkter använder zinklegering, a corrosive material whose price is only 1/3 of copper alloy. Detta material är lätt att korrodera, som inte bara påverkar utseendet, but also reduces the strength of the faucet, causing water leakage and cracking after a period of use. Jämfört med kopparlegeringar, zinc alloys are cheap and easy to process. In order to control costs and reduce processing links, some companies use zinc alloys instead of copper alloys to make greater profits.
⑤ Risk items (temperaturtest)
This sampling conducted a temperature test, som är, freezing the water nozzle at -10°C for 4 timmar, 8 timmar, 12 timmar, och 24 hours to test the sealing performance. Efter testning, bland 40 batches of taps sampled this time, totalt 7 batches of faucets have leaked in a low temperature environment.
För närvarande, there is no corresponding national standard for the freezing temperature value of faucets. Under normala omständigheter, the faucet will not be frozen and cracked at a few degrees below zero, but after low-temperature freezing, due to the expansion and condensation of water in the valve core, the valve core will be squeezed and stressed. Det kommer att bli läckage vid anslutningen. För att spara kostnader, some manufacturers use poor-quality brass as the casting material for the faucet. The ductility of the metal is greatly reduced, and it is easy to freeze at low temperatures and almost breaks when it is knocked.
(Sample with unqualified freeze-thaw sealing performance)
Konsumentrådgivning
①Avoid buying zinc alloy faucets
Zinc alloy is a corrosive material, so you should avoid this type of product when purchasing a faucet. Det kan särskiljas enligt produktens inre hålrum. Copper materials are generally castings, and the inner wall of the product is not very flat, while zinc alloys are injection-milled, the inner wall will be very smooth, and the inner wall has obvious separation lines. If possible, you can grind away the sample in an inconspicuous place to see the color. The color of zinc alloy is white, while copper alloy is yellow.
②Avoid buying low-cost faucets
The unqualified rate of faucets below 100 Yuan är så hög som 85.7%, and many items that have a greater impact on consumers’ hälsa, such as the precipitation of materials and metal pollutants, are not recommended.
③Look at the surface
Visually check whether the plating surface of the faucet is evenly glossy, and pay attention to whether there are any defects such as peeling, krackning, burning, botten, peeling, dark spots and obvious pitting. The sprayed surface structure should be fine, smidig och enhetlig, without defects such as sagging and bottoming. There is no burr or grit to the hand.
④Look at the thread
The pipe thread of the faucet is connected with the connecting hose or pipe. Vid köp, visually check the thread surface for defects such as dents and broken teeth. Pay special attention to the effective length of the pipe thread.
⑤ Titta på känslan
Try turning the handle up, ner, vänster, och rätt. If it feels light and does not feel blocking, the valve core is better. The main parts of a good quality faucet are made of brass. Var uppmärksam på att skilja produkter som använder legeringsmaterial och teknikplast, vars kvalitet och livslängd är relativt dålig.
⑥ Water saving
The faucet with a bubbler saves water better. Feel the water flow with your hand when purchasing. Det mjuka vattenflödet och rika skumning (Vattenflödesbubbelinnehåll) indicate that the bubbler is of better quality.