2205/2507 Duplex Stainless Steel Pipe ASTM A312 A789/A790 TP304/Tp316/Tp321 Seamless Tube

Since 2018, Zhongzheng Stainless Steel has actively cooperated with many domestic steel mills. Zhongzheng Stainless Steel regularly exchange steel technology with these mills and make progress from this. ln the process of communicating with customers, we carefully listen to customers' requirements and produce steel products as customers' demands. Under necessary circumstances,Zhongzheng Stainless Steel is willing to help customers find suitable steel mill to produce some special products to save time and cost for customers because we have the reliable resources of still mills to prevent you to be cheated.

To meet customer requirements, the quality inspector carries out final inspection and test of raw materials and finished pipe products in strict accordance with the inspection standard required by customers. According to stipulated standard requirements, analysis to chemical components of purchased materials and finished products is carried out to strictly control the materials, mechanical properties and chemical properties of finished products are tested, and eddy current test and ultrasonic nondestructive test are carried out, so as to guarantee product quality.

According to the technical conditions and requirements of product standards, the inspector will check the end appearance, bending degree, specified length,outside diameter, wall thickness dimension and internal and external surfaces of finished products one by one. After the product has been found to be up to standard through inspection and test, the quality certification of the product will be issued to ensure that satisfactory and reliable products are delivered to customers.

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