Jiangsu Hongyiyuan Metal Technology Co., Ltd
Jiangsu Hongyiyuan Metal Technology Co., Ltd
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With excellent mechanical properties, corrosion resistance, and good weldability, it has a wide range of uses in the oil and gas industry, marine engineering, chemical industry and other industries. The length of the oil and gas pipelines laid by duplex stainless steel in the oil and natural gas industry has exceeded 850Km, most of which are 2205 duplex stainless steel seamless steel pipes (some of them are S31803 duplex stainless steel pipes and 2507 duplex stainless steel pipes); West-East Gas Pipeline Due to the strong corrosiveness of the natural gas medium in the project, the high-pressure pipelines are all made of 2205 duplex stainless steel.
321 austenitic stainless steel has good corrosion resistance in the atmosphere and is widely used in petrochemical, electric power, bridge and automobile industries [1]. However, the "stainlessness" of stainless steel is not absolute. Due to the special service environment, stainless steel will also corrode. Factors such as medium concentration, pH value, and temperature will have a greater impact on the corrosion resistance of stainless steel. For example, long-term use within the sensitization temperature range of 450 to 850°C will cause intergranular corrosion of stainless steel. The mechanism is that C combines with Cr at the grain boundary to form Cr23C6 and precipitate, which reduces the Cr content at the grain boundary. This is the so-called "chromium depletion". The Cr element is one of the main elements that inhibit intergranular corrosion. When the Cr content at the grain boundary is less than 12%, the probability of intergranular corrosion will increase.
| Product Name | Stainless Steel Pipe/Tube |
| Material Grade | 201,304,310S,310,309,309S,316,316L,316Ti,317,317L,321, 321H,347,347H,304,304L, 302,301,202,403,405,409,409L,410,410S,420,430,631,904L,etc |
| Type | Seamless and welding pipe/tube |
| Shape | Round pipe, Square pipe, Rectangular pipe |
| Surface | Pickling/Polished/Satin/Hairline/Mirror Finish |
| Outside diameter | 6mm-630mm(seamless pipe) 9.5mm-1200mm(welding pipe) or as customer's requirement |
| Wall thickness | 2.5mm-30mm(seamless pipe) 20.5mm-20mm(welding pipe) or as customer's requirement |
| Length | 6 Meters and as customer's requirement |
| Standards | AISI ASTM JIS SUS and GB |
| Applications | Kitchenware, utensils, tableware, household appliances, construction decoration and daily products |
| Packing | Seaworthy wooden pallet or according to client's requirement |
| MOQ | 1 ton |
Our service is the basis of cooperation, and the recognition of customers determines the stability of our long-term strategic partnership.
Q: What's your advantage?
A: We have a large number of professional technical personnel, more competitive prices than other steel companies and the best after-sales service.
Q: Do you offer after-sales services?
A: Certainly. If you have any questions, please feel free to contact us. We will do our best to solve the problems and satisfy you.
Q: How about the delivery time?
A: Within 4-35 days after we confirm your orders. Depending on different products.
Q: How do you control quality?
A: All products are produced in strict accordance with relevant product standards, and the products are tested by relevant instruments and experimental equipment during the production process.
Q: Does the product have quality inspection before loading?
A: Of course, all our products have undergone strict quality inspection before packing. We accept customer’s inspection before loading.