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Jilin Province Industry and Commerce Bureau requires that unqualified commodity operators should stop selling unqualified goods according to the published information. The industrial and commercial organs under the jurisdiction shall organize an inventory of the unqualified commodities sold in the market under the jurisdiction and deal with the unqualified commodity operators according to law. At the same time, remind the majority of consumers when purchasing goods, should pay attention to check the product logo, certificate, understand the commodity related information, find suspected fake and shoddy goods, please call the industrial and Commercial Bureau 12315 complaint report telephone, safeguard their legitimate rights and interests.
This sampling inspection is based on GB/T 8464-2008 "Iron and copper threaded connection valves"; GB 18242-2008 "Elastomer modified asphalt waterproof coil"; GB 18173.1-2012 "Polymer waterproof materials Part 1: Sheet"; GB 1499.2-2007 "Steel for reinforced concrete - Part 2: Hot rolled ribbed bars"; GB/T 8814-2004 "Unplasticized polyvinyl chloride (PVC-U) profiles for doors and Windows"; GB 5237.6-2012 "Aluminum alloy building profiles Part 6: Heat insulation profiles"; GB 43351.1-2005 "Portable fire extinguishers Part 1 Performance and structural requirements"; GB 6246-2011 "Fire Hose"; GB 8181-2005 "Fire Water Gun"; GB 17945-2010 "Fire Emergency Lighting and evacuation Indication System" GB 18145-2014 "Ceramic seal Nozzle"; GB 25501-2010 "Water use Efficiency Limit value and water use efficiency grade of water nozzle", for identification and description, Limit value of valve body wall thickness, stem diameter, thread accuracy, surface corrosion resistance, flow rate, flow uniformity, water nozzle water efficiency, size, yield strength, tensile strength, weight deviation, tensile strength, elongation at break, tear strength, impermeability, composite strength, low temperature flexibility, soluble content, fire extinguishing agent test (ammonium dihydrogen phosphate content), basic function test, Usage instructions, dimensional change rate after heating, tensile impact strength, mark, mark and other indicators were tested.
The main problems:
1. Main problems of building waterproof coil. The main problems are that the marking items are not up to standard, the information on the outer packaging of the goods is missing, there are unclear production addresses, fraudulent use of production license numbers, no conformity marks, express product standards expired and many other phenomena; Sellers product quality awareness is not high, quite a number of sellers think that non-national standard products can still be sold.
2. Main problems of aluminum alloy plastic steel materials.
The dimensional change rate after heating is not up to standard. The dimensional change rate after heating is required to place the plastic profile in the blast drying oven at 100℃ for 60 minutes, and the dimensional change rate after heating of the visible surface of the main profile is ±2.0% in the GB/T 8814-2004 standard, and the difference between the heating dimensional change rate of the two visible surfaces of each sample should be ≤0.4%.
The tensile impact strength project mainly tests the damage behavior of the sample when it is subjected to instantaneous tensile impact. Whether the tensile impact strength test can meet the requirements mainly depends on the material characteristics and is closely related to the profile formula processing technology. Under the condition of high-speed tensile tensile, most ductile materials will be brittle and damaged, resulting in low tensile impact strength test value. In the GB/T 8814-2004 standard specifies ≥600 kJ/m2, leading to the product does not meet the tensile impact strength requirements of the main reason is also the mold design is unreasonable, plastic profile formula and extrusion process problems.
3. Main problems of fire supplies.
The unqualified item involved in the fire hose is the wear resistance. The wear resistance mainly tests the wear resistance of the fire hose, that is, the durability. The water belt will be dragged and rolled during use. If the wear resistance is not qualified, the water belt is more prone to wear during use, resulting in water leakage, rupture and other problems.
The non-conforming item involved in the portable dry powder fire extinguisher is the extinguishing agent inspection (ammonium dihydrogen phosphate content). Fire extinguishing agent (ammonium dihydrogen phosphate content) is an important test item. Dry powder extinguishing agent plays the core role of extinguishing fire in portable dry powder fire extinguisher. Ammonium dihydrogen phosphate has an endothermic reaction during combustion and plays a cooling role. The free ammonia produced by decomposition can react with the OH free radical produced in the flame combustion reaction, combine with the free radical produced in the combustion reaction, reduce its quantity, and thus reduce the combustion reaction rate. During the decomposition reaction of combustion, a layer of covering is generated on the surface of the combustion, which can isolate the contact between the surface of the combustion and the air, so as to prevent combustion. If the content of ammonium dihydrogen phosphate in the fire extinguishing agent is very low, it will greatly reduce its fire extinguishing ability, can not effectively control the fire, and even increase the fire risk.
4. Main problems of hot rolled ribbed steel bars.
The non-conforming items are: yield strength, tensile strength, size, mark, weight deviation. When the yield strength, tensile strength and other indicators are not qualified, the building structure resistance to damage will be weakened. The safety of the house is greatly reduced. The dimensional deviation will make the gripping force of concrete and steel bars, the supporting capacity of steel skeleton, and the sectional bearing capacity of the structure will decrease.
5. Main problem of water nozzle.
The corrosion resistance of the water nozzle surface is mainly tested by acid salt spray test to assess the degree of corrosion of the simulated water nozzle under the condition of poor use environment and high air humidity. The water nozzle that fails the acid salt spray test will produce "patina", black spots or corrosion on the surface after being used for a period of time, which seriously affects the appearance. Water nozzle is mostly used in the kitchen or bathroom, long-term acid, alkaline corrosion, such as product coating, coating is not good, the surface will produce a large number of corrosion points in the short term after use. The national standard GB 18145-2014 "Ceramic disc sealed water nozzle" stipulates that the water nozzle products should reach the level 9 standard after 24 hours of acid salt spray test (the old standard is 10). The reason for not meeting the national standards is that there is no plating according to the standard process requirements, and some in order to reduce the processing cost and shorten the plating time, the plating layer is less plated, the plating layer is too thin.
6. Main problem of valve.
Valve body wall thickness is not qualified. The valve body wall thickness required by the standard is 1.8mm~1.9mm, and the actual thickness of the unqualified sample valve body is between 1.26mm~1.66mm. The bearing capacity and stiffness of the valve will decrease, which will easily cause the valve shell to crack and cause hidden dangers to the safety of the user. The reasons that do not meet the national standards, one is not familiar with the standards; Second, the enterprise valve casting production technology and processing technology is not mature; Third, some samples because the valve body casting mold according to the old standard production (GB/T 8644-1998 "water heating internal thread connection valve"), valve standard updated (GB/T 8644-2008 "iron and copper thread connection valve"), the valve body wall thickness than the old standard has increased, resulting in the valve body wall thickness does not meet the requirements of the new standard; In addition, using the mold made according to the new standard for casting, due to the floating of the internal mold during casting, resulting in biased casting of the valve body, resulting in uneven wall thickness on both sides of the valve body, and the thin wall thickness is lower than the standard requirements.
Valve stem diameter is not qualified. In the sample of this random check, the diameter of the valve stem required by the standard is 7.5mm, and the diameter of the valve stem of the unqualified sample is between 6.9mm and 7.3mm. The valve stem is an important part of the valve opening and closing transmission mechanism, and the diameter of the valve stem refers to the diameter of the matching section with the packing. If it is not qualified, it will cause the opening and closing operation to be out of control or the valve stem to break, affecting the use of the product. The main reasons for not meeting the national standards are unfamiliar with the standards and backward production and processing technology of enterprises.
