These little things about stainless steel tubes

These little things about stainless steel tubes

1. What are the stainless steel tubes in the market at present and what are the differences in their quality?

At present the market sales of stainless steel pipe mainly produced in Buddha, Shandong and other two regions of stainless steel pipe manufacturers, stainless steel pipe material mainly 304, 201, 301 and so on. Mainly chromium, nickel content is different and produce differences, 304 stainless steel pipe material contains chromium 18, nickel 8-9, and 201, 301 stainless steel pipe material only contains chromium 14, 16, nickel 1, 5. Through scientific demonstration, contain chromium, nickel high, smelting technology good stainless steel tube use performance is better, anti-corrosion ability is stronger, finish lasting ability is stronger.

Two, why 201, 301 price is lower than 304?

Beware of fake "304". Because 201 and 304 stainless steel pipe material contains low chromium and nickel, the purchase of raw materials is cheap, such as 999 pure gold and 18K gold, gold content is different, the price is different. Therefore, the price of 201, 301 stainless steel tube on the low side. Individual bad manufacturers using material 201,301 stainless steel pipe is also engraved with the words "304", please users to buy in many aspects of in-depth understanding, beware of being cheated.

3. Why are there differences in quality and price of 304 pipes of the same material?

At present, raw materials from imports, domestic large and small manufacturers production, although it is material 304, but the smelting technology of each manufacturer, the chemical element content index is different, different quality, price difference of about 10%. And the manufacturing process of each pipe factory also has quality differences, after the use of performance, corrosion resistance ability also has strong and weak. Poor quality even if the near future does not rust, but long time will become gloomy color, yellow, and even rust. In the face of uneven and complex stainless steel market and related to the building decoration of the hundred years, you have to make a wise choice. Remind the user of coastal area especially here not to be greedy small cheap, lest regret. Therefore, it is recommended that we choose reliable and trustworthy brands.

Four, how to buy high-quality stainless steel pipe?

1, identify whether the stainless steel pipe surface steel seal material "304" word, and to obtain the manufacturer's quality certificate and quality guarantee certificate.

2, with acid reagent test, 30 seconds later, the material 304 does not change color, 201 black (copper sulfate point experiment is red).

3. Watch whether the color of the outer surface and inner wall of the tube is bright and smooth, whether the thickness is even, or there is rough phenomenon.

4, the purchase should be selected by the quality and technical supervision bureau evaluation of provincial brand products. The direct and effective method of purchase is to have a long-term use witness and a good reputation among customers.