Which industry need peristaltic pump hose
More and more households use stainless steel pipes for drinking water. These are what we call food-grade stainless steel pipes. But not all 304 stainless steel works for drinking water pipes. On the market, many 304 stainless steel decorative pipes get passed off as drinking water pipes. Unscrupulous sellers use these inferior products to trick consumers. Today, we’ll explore the differences between 304 stainless steel decorative pipes and hygienic food-grade 304 water pipes.
Different Production Processes
Hygienic food-grade 304 stainless steel water pipes have a wall thickness of 0.6mm to 0.8mm. The allowable deviation stays within ±10% of the nominal wall thickness. Their welds also need high quality. Plus, they must pass strict tests for flattening, flaring, bending, and tensile strength. The test water pressure must exceed 2.5Mpa. Production runs at just 1.5 meters per minute. During production, they also need online eddy current flaw detection. Sometimes, a hydrostatic test is required too.
In contrast, 304 stainless steel decorative pipes have no clear wall thickness standards. Their welds face low quality demands. There are also no strict rules for the pressure they can bear. As a result, they produce quickly—up to 20 meters per minute.
Different Standards
Hygienic food-grade stainless steel water pipes follow the standard GB/T29038-2012. This ensures their heavy metal migration stays within safe limits. They also resist scaling and bacterial growth over time. So you don’t have to worry about water quality. They even prevent secondary water pollution.
304 stainless steel decorative pipes, however, follow GB/T18705-2002. This means they can’t touch food directly or serve as drinking water pipes.
Different Applications
Food-grade 304 stainless steel pipes mainly work in water supply and drainage. They’re also great for food processing. General 304 stainless steel pipes, though, mostly serve in industry, home decoration, and similar fields.
Many stainless steel products end up in homes today. But with so many dishonest sellers, it’s hard to tell good from bad—unless you’re a professional. Judging stainless steel quality is tough. You can’t test the material easily. Usually, you can only make a simple judgment based on appearance. That’s why choosing a reliable pipe supplier matters. It’s the best way to ensure quality.
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