Main production process: round steel → re-inspection → peeling → blanking → centering → heating → perforation → pickling → flat head → inspection and grinding → cold rolling (cold drawing) → degreasing → heat treatment → straightening → pipe cutting (fixed-to-length) )→pickling/passivation→finished product inspection (eddy current, ultrasonic, water pressure)→packaging and storage.

The first step in the production of stainless steel pipes is the selection of raw materials. Stainless steel consists of iron, chromium, and varying amounts of other metals such as nickel, molybdenum, or titanium. It is important to choose high-quality raw materials to ensure the best quality and characteristics of the finished product.

Once the raw material is selected, the next step in the production process is to melt the steel in a furnace. The molten steel is then poured into a mold to make a solidified billet.

The billet is then sent to a hot rolling mill where it is formed into the desired shape. The hot rolled steel is then subjected to further heat treatments, such as annealing or quenching, to improve its properties. Annealing involves heating steel to high temperatures and then cooling it slowly to make it softer and more ductile. Quenching involves rapidly cooling steel to temper it and make it stronger.

The next step in production is machining. Stainless steel tubing is machined to its final shape, size and length using a variety of tools including lathes, milling machines and drills.

The machining process may also involve removing any surface imperfections such as roughness or burrs. After the machining process, the stainless steel pipes are cleaned to remove any contamination before being sent for inspection. This is a critical step in ensuring that the finished product meets the required specifications and quality standards.

The testing process includes pressure testing, magnetic particle testing, ultrasonic testing and other testing. Finally, the stainless steel pipe is complete and ready for shipment or installation.

Pipes can be given various surface treatments such as polishing, grinding or electropolishing to improve their appearance and corrosion resistance.

In conclusion, the production process of stainless steel pipe is complex and requires expertise and attention to detail. However, the advantages of stainless steel pipe make it a popular material in various industries. The process of selecting quality raw materials, melting, casting, rolling, heat treating, machining, inspecting and finishing results in a durable, corrosion-resistant product that can withstand harsh conditions and provide years of reliable service.