How should I distinguish between national standard and non-standard of flexible waterproof casing?

How should I distinguish between national standard and non-standard of flexible waterproof casing?
Flexible waterproof casing is a common pipeline protection material, which is soft, corrosion-resistant, waterproof and moisture-proof, and is widely used in wire and cable, communication equipment, traffic signal lights and other fields. In the market, flexible waterproof casing can be divided into two types: national standard and non-standard.
 
National standard flexible waterproof casing is a product manufactured in accordance with national standards, in line with relevant national laws and regulations and quality standards. National standard flexible waterproof casing manufacturers must be certified by the relevant state departments, product quality is guaranteed, and consumers are more assured of its quality.
The opposite is non-standard flexible waterproof casing. Non-standard flexible waterproofing casing is not certified by the state products, also known as the "stall goods". These products are simple manufacturing process, quality is difficult to guarantee, prone to poor waterproofing, corrosion resistance and other problems.
 
1 . How to distinguish between national standard and non-standard flexible waterproof casing? First, you can judge from the outer packaging. National standard flexible waterproof casing packaging will have a clear national certification seal or logo, which will show the product specifications, model, production date and other information. And non-standard flexible waterproofing casing packaging often do not have these signs, or signs are not standardized, and even can be changed at will.
2 . Can be judged by the quality of the product. National standard flexible waterproofing casing manufacturers will be quality testing of each product to ensure that the product conforms to relevant national laws and regulations and quality standards. The non-standard flexible waterproof casing due to the lack of quality assurance, the quality and performance of the material is often not guaranteed, there may be poor electrical conductivity, waterproof performance and other problems.
3 . When buying flexible waterproof casing, you also need to pay attention to the price. National standard flexible waterproofing casing is more expensive than non-standard flexible waterproofing casing, but the quality is guaranteed, and the service life is longer. And non-standard flexible waterproofing casing is inexpensive, but the quality is difficult to guarantee, the service life is shorter.